From 5e3c031872977c5d15e3b72e4efc11cdd153e60e Mon Sep 17 00:00:00 2001
From: wyh <1002682355@qq.com>
Date: Mon, 6 Oct 2025 15:39:51 +0800
Subject: [PATCH] Lab2 publish

---
 CMakeLists.txt                                |  54 ++
 README.md                                     |  12 +-
 include/cminusfc/cminusf_builder.hpp          | 113 +++
 include/common/ast.hpp                        | 256 ++++++
 include/common/logging.hpp                    |  69 ++
 include/common/syntax_tree.h                  |  31 +
 include/lightir/BasicBlock.hpp                |  64 ++
 include/lightir/Constant.hpp                  |  64 ++
 include/lightir/Function.hpp                  |  80 ++
 include/lightir/GlobalVariable.hpp            |  23 +
 include/lightir/IRBuilder.hpp                 | 131 +++
 include/lightir/IRprinter.hpp                 |  14 +
 include/lightir/Instruction.hpp               | 369 ++++++++
 include/lightir/Module.hpp                    |  59 ++
 include/lightir/Type.hpp                      | 118 +++
 include/lightir/User.hpp                      |  41 +
 include/lightir/Value.hpp                     |  60 ++
 src/CMakeLists.txt                            |   6 +
 src/cminusfc/CMakeLists.txt                   |  18 +
 src/cminusfc/cminusf_builder.cpp              | 178 ++++
 src/cminusfc/main.cpp                         | 117 +++
 src/common/CMakeLists.txt                     |   8 +
 src/common/ast.cpp                            | 592 +++++++++++++
 src/common/logging.cpp                        |  38 +
 src/common/syntax_tree.c                      |  75 ++
 src/io/CMakeLists.txt                         |   6 +
 src/io/io.c                                   |  16 +
 src/io/io.h                                   |   7 +
 src/lightir/BasicBlock.cpp                    |  71 ++
 src/lightir/CMakeLists.txt                    |  18 +
 src/lightir/Constant.cpp                      | 116 +++
 src/lightir/Function.cpp                      | 131 +++
 src/lightir/GlobalVariable.cpp                |  28 +
 src/lightir/IRprinter.cpp                     | 335 ++++++++
 src/lightir/Instruction.cpp                   | 364 ++++++++
 src/lightir/Module.cpp                        |  80 ++
 src/lightir/Type.cpp                          | 181 ++++
 src/lightir/User.cpp                          |  41 +
 src/lightir/Value.cpp                         |  43 +
 src/logging/CMakeLists.txt                    |  14 +
 src/logging/test_ast.cpp                      |  15 +
 src/logging/test_logging.cpp                  |  12 +
 src/parser/CMakeLists.txt                     |  26 +
 src/parser/lexer.c                            |  41 +
 src/parser/lexical_analyzer.l                 |  46 +
 src/parser/parser.c                           |  20 +
 src/parser/syntax_analyzer.y                  | 181 ++++
 tests/1-parser/cleanup.sh                     |   3 +
 tests/1-parser/eval_phase1.sh                 | 109 +++
 tests/1-parser/eval_phase2.sh                 | 116 +++
 tests/1-parser/input/easy/FAIL_comment.cminus |   1 +
 .../1-parser/input/easy/FAIL_comment2.cminus  |   5 +
 .../1-parser/input/easy/FAIL_function.cminus  |   3 +
 tests/1-parser/input/easy/FAIL_id.cminus      |   3 +
 tests/1-parser/input/easy/expr.cminus         |  16 +
 tests/1-parser/input/easy/id.cminus           |   3 +
 .../input/hard/You_Should_Pass.cminus         |  33 +
 tests/1-parser/input/hard/assoc.cminus        |   5 +
 tests/1-parser/input/hard/gcd.cminus          |  16 +
 tests/1-parser/input/hard/hanoi.cminus        |  27 +
 tests/1-parser/input/hard/if.cminus           |   6 +
 .../1-parser/input/hard/selectionsort.cminus  |  42 +
 .../1-parser/input/normal/FAIL_assign.cminus  |   5 +
 .../input/normal/FAIL_local-decl.cminus       |   6 +
 tests/1-parser/input/normal/array.cminus      |   5 +
 tests/1-parser/input/normal/func.cminus       |   7 +
 tests/1-parser/input/normal/if.cminus         |  17 +
 tests/1-parser/input/normal/local-decl.cminus |   5 +
 .../1-parser/input/normal/skip_spaces.cminus  |  28 +
 .../easy/FAIL_comment.syntax_tree             |   0
 .../easy/FAIL_comment2.syntax_tree            |   0
 .../easy/FAIL_function.syntax_tree            |   0
 .../output_standard/easy/FAIL_id.syntax_tree  |   0
 .../output_standard/easy/expr.syntax_tree     | 176 ++++
 .../output_standard/easy/id.syntax_tree       |  42 +
 .../hard/You_Should_Pass.syntax_tree          | 369 ++++++++
 .../output_standard/hard/assoc.syntax_tree    | 120 +++
 .../output_standard/hard/gcd.syntax_tree      | 291 +++++++
 .../output_standard/hard/hanoi.syntax_tree    | 558 ++++++++++++
 .../output_standard/hard/if.syntax_tree       |  81 ++
 .../hard/selectionsort.syntax_tree            | 765 +++++++++++++++++
 .../normal/FAIL_assign.syntax_tree            |   0
 .../normal/FAIL_local-decl.syntax_tree        |   0
 .../output_standard/normal/array.syntax_tree  |  63 ++
 .../output_standard/normal/func.syntax_tree   |  71 ++
 .../output_standard/normal/if.syntax_tree     | 147 ++++
 .../normal/local-decl.syntax_tree             |  48 ++
 .../normal/skip_spaces.syntax_tree            | 237 ++++++
 .../testcases_general/1-return.syntax_tree    |  23 +
 .../testcases_general/10-funcall.syntax_tree  |  92 ++
 .../11-funcall_chain.syntax_tree              | 135 +++
 .../12-funcall_recursion.syntax_tree          | 150 ++++
 .../testcases_general/13-if_stmt.syntax_tree  |  86 ++
 .../14-while_stmt.syntax_tree                 |  87 ++
 .../testcases_general/15-if_while.syntax_tree | 215 +++++
 .../testcases_general/16-if_chain.syntax_tree | 147 ++++
 .../17-while_chain.syntax_tree                | 165 ++++
 .../18-global_var.syntax_tree                 |  52 ++
 .../19-global_local_var.syntax_tree           | 110 +++
 .../testcases_general/2-decl_int.syntax_tree  |  29 +
 .../20-gcd_array.syntax_tree                  | 429 ++++++++++
 .../testcases_general/21-comment.syntax_tree  |  23 +
 .../3-decl_float.syntax_tree                  |  29 +
 .../4-decl_int_array.syntax_tree              |  32 +
 .../5-decl_float_array.syntax_tree            |  32 +
 .../6-num_add_int.syntax_tree                 |  58 ++
 .../7-assign_int_var_local.syntax_tree        |  51 ++
 .../8-assign_int_array_local.syntax_tree      |  72 ++
 .../9-assign_cast.syntax_tree                 |  93 ++
 .../output_standard_ast/easy/FAIL_comment.ast |   0
 .../easy/FAIL_comment2.ast                    |   0
 .../easy/FAIL_function.ast                    |   0
 .../output_standard_ast/easy/FAIL_id.ast      |   0
 .../output_standard_ast/easy/expr.ast         |  74 ++
 .../1-parser/output_standard_ast/easy/id.ast  |   6 +
 .../hard/You_Should_Pass.ast                  | 115 +++
 .../output_standard_ast/hard/assoc.ast        |  45 +
 .../1-parser/output_standard_ast/hard/gcd.ast | 105 +++
 .../output_standard_ast/hard/hanoi.ast        | 203 +++++
 .../1-parser/output_standard_ast/hard/if.ast  |  21 +
 .../hard/selectionsort.ast                    | 283 +++++++
 .../normal/FAIL_assign.ast                    |   0
 .../normal/FAIL_local-decl.ast                |   0
 .../output_standard_ast/normal/array.ast      |  21 +
 .../output_standard_ast/normal/func.ast       |  17 +
 .../output_standard_ast/normal/if.ast         |  50 ++
 .../output_standard_ast/normal/local-decl.ast |  11 +
 .../normal/skip_spaces.ast                    |  86 ++
 .../testcases_general/1-return.ast            |   4 +
 .../testcases_general/10-funcall.ast          |  25 +
 .../testcases_general/11-funcall_chain.ast    |  43 +
 .../12-funcall_recursion.ast                  |  50 ++
 .../testcases_general/13-if_stmt.ast          |  31 +
 .../testcases_general/14-while_stmt.ast       |  28 +
 .../testcases_general/15-if_while.ast         |  80 ++
 .../testcases_general/16-if_chain.ast         |  56 ++
 .../testcases_general/17-while_chain.ast      |  59 ++
 .../testcases_general/18-global_var.ast       |  16 +
 .../testcases_general/19-global_local_var.ast |  32 +
 .../testcases_general/2-decl_int.ast          |   5 +
 .../testcases_general/20-gcd_array.ast        | 151 ++++
 .../testcases_general/21-comment.ast          |   4 +
 .../testcases_general/3-decl_float.ast        |   5 +
 .../testcases_general/4-decl_int_array.ast    |   6 +
 .../testcases_general/5-decl_float_array.ast  |   6 +
 .../testcases_general/6-num_add_int.ast       |  19 +
 .../7-assign_int_var_local.ast                |  16 +
 .../8-assign_int_array_local.ast              |  25 +
 .../testcases_general/9-assign_cast.ast       |  33 +
 tests/2-ir-gen/autogen/.gitignore             |   1 +
 .../autogen/answers/lv0_1/decl_float.out      |   0
 .../answers/lv0_1/decl_float_array.out        |   0
 .../autogen/answers/lv0_1/decl_int.out        |   0
 .../autogen/answers/lv0_1/decl_int_array.out  |   0
 tests/2-ir-gen/autogen/answers/lv0_1/input.in |   1 +
 .../2-ir-gen/autogen/answers/lv0_1/input.out  |   0
 .../autogen/answers/lv0_1/output_float.out    |   1 +
 .../autogen/answers/lv0_1/output_int.out      |   1 +
 .../2-ir-gen/autogen/answers/lv0_1/return.out |   0
 .../autogen/answers/lv0_2/num_add_float.out   |   1 +
 .../autogen/answers/lv0_2/num_add_int.out     |   1 +
 .../autogen/answers/lv0_2/num_add_mixed.out   |   1 +
 .../autogen/answers/lv0_2/num_comp1.out       |   1 +
 .../autogen/answers/lv0_2/num_comp2.out       |   4 +
 .../autogen/answers/lv0_2/num_div_float.out   |   1 +
 .../autogen/answers/lv0_2/num_div_int.out     |   1 +
 .../autogen/answers/lv0_2/num_div_mixed.out   |   1 +
 .../autogen/answers/lv0_2/num_eq_float.out    |   3 +
 .../autogen/answers/lv0_2/num_eq_int.out      |   3 +
 .../autogen/answers/lv0_2/num_eq_mixed.out    |   3 +
 .../autogen/answers/lv0_2/num_ge_float.out    |   3 +
 .../autogen/answers/lv0_2/num_ge_int.out      |   3 +
 .../autogen/answers/lv0_2/num_ge_mixed.out    |   3 +
 .../autogen/answers/lv0_2/num_gt_float.out    |   3 +
 .../autogen/answers/lv0_2/num_gt_int.out      |   3 +
 .../autogen/answers/lv0_2/num_gt_mixed.out    |   3 +
 .../autogen/answers/lv0_2/num_le_float.out    |   3 +
 .../autogen/answers/lv0_2/num_le_int.out      |   3 +
 .../autogen/answers/lv0_2/num_le_mixed.out    |   3 +
 .../autogen/answers/lv0_2/num_lt_float.out    |   3 +
 .../autogen/answers/lv0_2/num_lt_int.out      |   3 +
 .../autogen/answers/lv0_2/num_lt_mixed.out    |   3 +
 .../autogen/answers/lv0_2/num_mul_float.out   |   1 +
 .../autogen/answers/lv0_2/num_mul_int.out     |   1 +
 .../autogen/answers/lv0_2/num_mul_mixed.out   |   1 +
 .../autogen/answers/lv0_2/num_neq_float.out   |   3 +
 .../autogen/answers/lv0_2/num_neq_int.out     |   3 +
 .../autogen/answers/lv0_2/num_neq_mixed.out   |   3 +
 .../autogen/answers/lv0_2/num_sub_float.out   |   1 +
 .../autogen/answers/lv0_2/num_sub_int.out     |   1 +
 .../autogen/answers/lv0_2/num_sub_mixed.out   |   1 +
 .../autogen/answers/lv1/assign_cmp.out        |   3 +
 .../answers/lv1/assign_float_array_global.out |   1 +
 .../answers/lv1/assign_float_array_local.out  |   1 +
 .../answers/lv1/assign_float_var_global.out   |   1 +
 .../answers/lv1/assign_float_var_local.out    |   1 +
 .../answers/lv1/assign_int_array_global.out   |   1 +
 .../answers/lv1/assign_int_array_local.out    |   1 +
 .../answers/lv1/assign_int_var_global.out     |   1 +
 .../answers/lv1/assign_int_var_local.out      |   1 +
 .../autogen/answers/lv1/idx_float.out         |   1 +
 tests/2-ir-gen/autogen/answers/lv1/innout.in  |   1 +
 tests/2-ir-gen/autogen/answers/lv1/innout.out |   1 +
 .../autogen/answers/lv1/iteration1.out        |  10 +
 .../autogen/answers/lv1/iteration2.out        |  10 +
 .../autogen/answers/lv1/negidx_float.out      |   1 +
 .../answers/lv1/negidx_floatfuncall.out       |   1 +
 .../autogen/answers/lv1/negidx_int.out        |   1 +
 .../autogen/answers/lv1/negidx_intfuncall.out |   1 +
 .../answers/lv1/negidx_voidfuncall.out        |   1 +
 tests/2-ir-gen/autogen/answers/lv1/scope.out  |   3 +
 .../autogen/answers/lv1/selection1.out        |   2 +
 .../autogen/answers/lv1/selection2.out        |   2 +
 .../autogen/answers/lv1/selection3.out        |   3 +
 .../answers/lv1/transfer_float_to_int.out     |   1 +
 .../answers/lv1/transfer_int_to_float.out     |   1 +
 .../autogen/answers/lv2/assign_chain.out      |   3 +
 .../autogen/answers/lv2/funcall_array.out     |   1 +
 .../answers/lv2/funcall_array_array.out       |   2 +
 .../autogen/answers/lv2/funcall_chain.out     |   1 +
 .../answers/lv2/funcall_float_array.out       |   1 +
 .../autogen/answers/lv2/funcall_int_array.out |   1 +
 .../answers/lv2/funcall_type_mismatch1.out    |   1 +
 .../answers/lv2/funcall_type_mismatch2.out    |   1 +
 .../autogen/answers/lv2/funcall_var.out       |   1 +
 .../autogen/answers/lv2/return_in_middle1.out |   1 +
 .../autogen/answers/lv2/return_in_middle2.out |   1 +
 .../answers/lv2/return_type_mismatch1.out     |   1 +
 .../answers/lv2/return_type_mismatch2.out     |   1 +
 .../2-ir-gen/autogen/answers/lv3/complex1.out | 800 ++++++++++++++++++
 .../2-ir-gen/autogen/answers/lv3/complex2.in  |  10 +
 .../2-ir-gen/autogen/answers/lv3/complex2.out |  10 +
 .../2-ir-gen/autogen/answers/lv3/complex3.in  |   2 +
 .../2-ir-gen/autogen/answers/lv3/complex3.out |   1 +
 .../2-ir-gen/autogen/answers/lv3/complex4.out |   3 +
 tests/2-ir-gen/autogen/eval_lab2.py           | 180 ++++
 tests/2-ir-gen/autogen/eval_lab2.sh           |   3 +
 .../autogen/testcases/lv0_1/decl_float.cminus |   4 +
 .../testcases/lv0_1/decl_float_array.cminus   |   4 +
 .../autogen/testcases/lv0_1/decl_int.cminus   |   4 +
 .../testcases/lv0_1/decl_int_array.cminus     |   4 +
 .../autogen/testcases/lv0_1/input.cminus      |   4 +
 .../testcases/lv0_1/output_float.cminus       |   4 +
 .../autogen/testcases/lv0_1/output_int.cminus |   4 +
 .../autogen/testcases/lv0_1/return.cminus     |   1 +
 .../testcases/lv0_2/num_add_float.cminus      |   4 +
 .../testcases/lv0_2/num_add_int.cminus        |   4 +
 .../testcases/lv0_2/num_add_mixed.cminus      |   4 +
 .../autogen/testcases/lv0_2/num_comp1.cminus  |   4 +
 .../autogen/testcases/lv0_2/num_comp2.cminus  |   7 +
 .../testcases/lv0_2/num_div_float.cminus      |   4 +
 .../testcases/lv0_2/num_div_int.cminus        |   4 +
 .../testcases/lv0_2/num_div_mixed.cminus      |   4 +
 .../testcases/lv0_2/num_eq_float.cminus       |   6 +
 .../autogen/testcases/lv0_2/num_eq_int.cminus |   6 +
 .../testcases/lv0_2/num_eq_mixed.cminus       |   6 +
 .../testcases/lv0_2/num_ge_float.cminus       |   6 +
 .../autogen/testcases/lv0_2/num_ge_int.cminus |   6 +
 .../testcases/lv0_2/num_ge_mixed.cminus       |   6 +
 .../testcases/lv0_2/num_gt_float.cminus       |   6 +
 .../autogen/testcases/lv0_2/num_gt_int.cminus |   6 +
 .../testcases/lv0_2/num_gt_mixed.cminus       |   6 +
 .../testcases/lv0_2/num_le_float.cminus       |   6 +
 .../autogen/testcases/lv0_2/num_le_int.cminus |   6 +
 .../testcases/lv0_2/num_le_mixed.cminus       |   6 +
 .../testcases/lv0_2/num_lt_float.cminus       |   6 +
 .../autogen/testcases/lv0_2/num_lt_int.cminus |   6 +
 .../testcases/lv0_2/num_lt_mixed.cminus       |   6 +
 .../testcases/lv0_2/num_mul_float.cminus      |   4 +
 .../testcases/lv0_2/num_mul_int.cminus        |   4 +
 .../testcases/lv0_2/num_mul_mixed.cminus      |   4 +
 .../testcases/lv0_2/num_neq_float.cminus      |   6 +
 .../testcases/lv0_2/num_neq_int.cminus        |   6 +
 .../testcases/lv0_2/num_neq_mixed.cminus      |   6 +
 .../testcases/lv0_2/num_sub_float.cminus      |   4 +
 .../testcases/lv0_2/num_sub_int.cminus        |   4 +
 .../testcases/lv0_2/num_sub_mixed.cminus      |   4 +
 .../autogen/testcases/lv1/assign_cmp.cminus   |  12 +
 .../lv1/assign_float_array_global.cminus      |   6 +
 .../lv1/assign_float_array_local.cminus       |   6 +
 .../lv1/assign_float_var_global.cminus        |   6 +
 .../lv1/assign_float_var_local.cminus         |   6 +
 .../lv1/assign_int_array_global.cminus        |   6 +
 .../lv1/assign_int_array_local.cminus         |   6 +
 .../lv1/assign_int_var_global.cminus          |   6 +
 .../testcases/lv1/assign_int_var_local.cminus |   6 +
 .../autogen/testcases/lv1/idx_float.cminus    |   6 +
 .../autogen/testcases/lv1/innout.cminus       |   6 +
 .../autogen/testcases/lv1/iteration1.cminus   |   9 +
 .../autogen/testcases/lv1/iteration2.cminus   |   9 +
 .../autogen/testcases/lv1/negidx_float.cminus |   5 +
 .../testcases/lv1/negidx_floatfuncall.cminus  |   9 +
 .../autogen/testcases/lv1/negidx_int.cminus   |   5 +
 .../testcases/lv1/negidx_intfuncall.cminus    |   9 +
 .../testcases/lv1/negidx_voidfuncall.cminus   |   9 +
 .../autogen/testcases/lv1/scope.cminus        |  12 +
 .../autogen/testcases/lv1/selection1.cminus   |   8 +
 .../autogen/testcases/lv1/selection2.cminus   |   9 +
 .../autogen/testcases/lv1/selection3.cminus   |  15 +
 .../lv1/transfer_float_to_int.cminus          |   6 +
 .../lv1/transfer_int_to_float.cminus          |   6 +
 .../autogen/testcases/lv2/assign_chain.cminus |  10 +
 .../testcases/lv2/funcall_array_array.cminus  |  17 +
 .../testcases/lv2/funcall_chain.cminus        |   7 +
 .../testcases/lv2/funcall_float_array.cminus  |  11 +
 .../testcases/lv2/funcall_int_array.cminus    |  11 +
 .../lv2/funcall_type_mismatch1.cminus         |  11 +
 .../lv2/funcall_type_mismatch2.cminus         |  11 +
 .../autogen/testcases/lv2/funcall_var.cminus  |  11 +
 .../testcases/lv2/return_in_middle1.cminus    |  16 +
 .../testcases/lv2/return_in_middle2.cminus    |  14 +
 .../lv2/return_type_mismatch1.cminus          |   6 +
 .../lv2/return_type_mismatch2.cminus          |   6 +
 .../autogen/testcases/lv3/complex1.cminus     |  71 ++
 .../autogen/testcases/lv3/complex2.cminus     |  50 ++
 .../autogen/testcases/lv3/complex3.cminus     |  22 +
 .../autogen/testcases/lv3/complex4.cminus     | 105 +++
 tests/2-ir-gen/warmup/CMakeLists.txt          |  45 +
 tests/2-ir-gen/warmup/c_cases/assign.c        |   6 +
 tests/2-ir-gen/warmup/c_cases/fun.c           |   2 +
 tests/2-ir-gen/warmup/c_cases/if.c            |   6 +
 tests/2-ir-gen/warmup/c_cases/while.c         |  11 +
 .../2-ir-gen/warmup/calculator/CMakeLists.txt |  27 +
 tests/2-ir-gen/warmup/calculator/calc.cpp     |  48 ++
 tests/2-ir-gen/warmup/calculator/calc_ast.cpp | 115 +++
 tests/2-ir-gen/warmup/calculator/calc_ast.hpp |  90 ++
 .../warmup/calculator/calc_builder.cpp        |  63 ++
 .../warmup/calculator/calc_builder.hpp        |  26 +
 tests/2-ir-gen/warmup/calculator/calculator.l |  36 +
 tests/2-ir-gen/warmup/calculator/calculator.y | 108 +++
 .../warmup/stu_cpp/assign_generator.cpp       |   1 +
 .../2-ir-gen/warmup/stu_cpp/fun_generator.cpp |   1 +
 .../2-ir-gen/warmup/stu_cpp/if_generator.cpp  |   1 +
 .../warmup/stu_cpp/while_generator.cpp        |   1 +
 tests/2-ir-gen/warmup/stu_ll/assign_hand.ll   |   0
 tests/2-ir-gen/warmup/stu_ll/fun_hand.ll      |   0
 tests/2-ir-gen/warmup/stu_ll/if_hand.ll       |   0
 tests/2-ir-gen/warmup/stu_ll/while_hand.ll    |   0
 tests/2-ir-gen/warmup/ta_gcd/gcd_array.c      |  29 +
 .../warmup/ta_gcd/gcd_array_generator.cpp     | 230 +++++
 tests/CMakeLists.txt                          |   1 +
 tests/testcases_general/1-return.cminus       |   1 +
 tests/testcases_general/1-return.out          |   1 +
 tests/testcases_general/10-funcall.cminus     |  10 +
 tests/testcases_general/10-funcall.out        |   1 +
 .../testcases_general/11-funcall_chain.cminus |   6 +
 tests/testcases_general/11-funcall_chain.out  |   1 +
 .../12-funcall_recursion.cminus               |  11 +
 .../12-funcall_recursion.out                  |   1 +
 tests/testcases_general/13-if_stmt.cminus     |   8 +
 tests/testcases_general/13-if_stmt.out        |   1 +
 tests/testcases_general/14-while_stmt.cminus  |   8 +
 tests/testcases_general/14-while_stmt.out     |   1 +
 tests/testcases_general/15-if_while.cminus    |  17 +
 tests/testcases_general/15-if_while.out       |   1 +
 tests/testcases_general/16-if_chain.cminus    |  14 +
 tests/testcases_general/16-if_chain.out       |   1 +
 tests/testcases_general/17-while_chain.cminus |  13 +
 tests/testcases_general/17-while_chain.out    |   1 +
 tests/testcases_general/18-global_var.cminus  |   5 +
 tests/testcases_general/18-global_var.out     |   1 +
 .../19-global_local_var.cminus                |  11 +
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 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/iteration2.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/negidx_float.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/negidx_floatfuncall.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/negidx_int.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/negidx_intfuncall.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/negidx_voidfuncall.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/scope.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/selection1.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/selection2.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/selection3.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/transfer_float_to_int.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv1/transfer_int_to_float.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/assign_chain.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/funcall_array_array.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/funcall_chain.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/funcall_float_array.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/funcall_int_array.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/funcall_type_mismatch1.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/funcall_type_mismatch2.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/funcall_var.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/return_in_middle1.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/return_in_middle2.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/return_type_mismatch1.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv2/return_type_mismatch2.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv3/complex1.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv3/complex2.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv3/complex3.cminus
 create mode 100644 tests/2-ir-gen/autogen/testcases/lv3/complex4.cminus
 create mode 100755 tests/2-ir-gen/warmup/CMakeLists.txt
 create mode 100644 tests/2-ir-gen/warmup/c_cases/assign.c
 create mode 100644 tests/2-ir-gen/warmup/c_cases/fun.c
 create mode 100644 tests/2-ir-gen/warmup/c_cases/if.c
 create mode 100644 tests/2-ir-gen/warmup/c_cases/while.c
 create mode 100644 tests/2-ir-gen/warmup/calculator/CMakeLists.txt
 create mode 100644 tests/2-ir-gen/warmup/calculator/calc.cpp
 create mode 100644 tests/2-ir-gen/warmup/calculator/calc_ast.cpp
 create mode 100644 tests/2-ir-gen/warmup/calculator/calc_ast.hpp
 create mode 100644 tests/2-ir-gen/warmup/calculator/calc_builder.cpp
 create mode 100644 tests/2-ir-gen/warmup/calculator/calc_builder.hpp
 create mode 100644 tests/2-ir-gen/warmup/calculator/calculator.l
 create mode 100644 tests/2-ir-gen/warmup/calculator/calculator.y
 create mode 100644 tests/2-ir-gen/warmup/stu_cpp/assign_generator.cpp
 create mode 100644 tests/2-ir-gen/warmup/stu_cpp/fun_generator.cpp
 create mode 100644 tests/2-ir-gen/warmup/stu_cpp/if_generator.cpp
 create mode 100644 tests/2-ir-gen/warmup/stu_cpp/while_generator.cpp
 create mode 100644 tests/2-ir-gen/warmup/stu_ll/assign_hand.ll
 create mode 100644 tests/2-ir-gen/warmup/stu_ll/fun_hand.ll
 create mode 100644 tests/2-ir-gen/warmup/stu_ll/if_hand.ll
 create mode 100644 tests/2-ir-gen/warmup/stu_ll/while_hand.ll
 create mode 100644 tests/2-ir-gen/warmup/ta_gcd/gcd_array.c
 create mode 100644 tests/2-ir-gen/warmup/ta_gcd/gcd_array_generator.cpp
 create mode 100644 tests/CMakeLists.txt
 create mode 100644 tests/testcases_general/1-return.cminus
 create mode 100644 tests/testcases_general/1-return.out
 create mode 100644 tests/testcases_general/10-funcall.cminus
 create mode 100644 tests/testcases_general/10-funcall.out
 create mode 100644 tests/testcases_general/11-funcall_chain.cminus
 create mode 100644 tests/testcases_general/11-funcall_chain.out
 create mode 100644 tests/testcases_general/12-funcall_recursion.cminus
 create mode 100644 tests/testcases_general/12-funcall_recursion.out
 create mode 100644 tests/testcases_general/13-if_stmt.cminus
 create mode 100644 tests/testcases_general/13-if_stmt.out
 create mode 100644 tests/testcases_general/14-while_stmt.cminus
 create mode 100644 tests/testcases_general/14-while_stmt.out
 create mode 100644 tests/testcases_general/15-if_while.cminus
 create mode 100644 tests/testcases_general/15-if_while.out
 create mode 100644 tests/testcases_general/16-if_chain.cminus
 create mode 100644 tests/testcases_general/16-if_chain.out
 create mode 100644 tests/testcases_general/17-while_chain.cminus
 create mode 100644 tests/testcases_general/17-while_chain.out
 create mode 100644 tests/testcases_general/18-global_var.cminus
 create mode 100644 tests/testcases_general/18-global_var.out
 create mode 100644 tests/testcases_general/19-global_local_var.cminus
 create mode 100644 tests/testcases_general/19-global_local_var.out
 create mode 100644 tests/testcases_general/2-decl_int.cminus
 create mode 100644 tests/testcases_general/2-decl_int.out
 create mode 100644 tests/testcases_general/20-gcd_array.cminus
 create mode 100644 tests/testcases_general/20-gcd_array.out
 create mode 100644 tests/testcases_general/21-comment.cminus
 create mode 100644 tests/testcases_general/21-comment.out
 create mode 100644 tests/testcases_general/3-decl_float.cminus
 create mode 100644 tests/testcases_general/3-decl_float.out
 create mode 100644 tests/testcases_general/4-decl_int_array.cminus
 create mode 100644 tests/testcases_general/4-decl_int_array.out
 create mode 100644 tests/testcases_general/5-decl_float_array.cminus
 create mode 100644 tests/testcases_general/5-decl_float_array.out
 create mode 100644 tests/testcases_general/6-num_add_int.cminus
 create mode 100644 tests/testcases_general/6-num_add_int.out
 create mode 100644 tests/testcases_general/7-assign_int_var_local.cminus
 create mode 100644 tests/testcases_general/7-assign_int_var_local.out
 create mode 100644 tests/testcases_general/8-assign_int_array_local.cminus
 create mode 100644 tests/testcases_general/8-assign_int_array_local.out
 create mode 100644 tests/testcases_general/9-assign_cast.cminus
 create mode 100644 tests/testcases_general/9-assign_cast.out
 create mode 100644 tests/testcases_general/README.md

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100755
index 0000000..65ba81d
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,54 @@
+cmake_minimum_required( VERSION 3.8 )
+project(CMINUSF)
+
+set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -std=c99")
+
+SET(CMAKE_CXX_FLAGS_DEBUG "$ENV{CXXFLAGS} -O0 -Wall -g2 -ggdb")
+SET(CMAKE_CXX_FLAGS_RELEASE "$ENV{CXXFLAGS} -O3 -Wall")
+SET(CMAKE_CXX_FLAGS_ASAN "${CMAKE_CXX_FLAGS_DEBUG} -fsanitize=undefined -fsanitize=address")
+
+set(default_build_type "Debug")
+
+if(NOT(CMAKE_BUILD_TYPE_SHADOW STREQUAL CMAKE_BUILD_TYPE))
+    if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+        message(STATUS "Setting build type to '${default_build_type}'")
+        set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE STRING "Choose the type of build." FORCE)
+    else()
+        message(STATUS "Building in ${CMAKE_BUILD_TYPE} mode")
+    endif()
+
+    set(CMAKE_BUILD_TYPE_SHADOW ${CMAKE_BUILD_TYPE} CACHE STRING "used to detect changes in build type" FORCE)
+endif()
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+find_package(FLEX REQUIRED)
+find_package(BISON REQUIRED)
+find_package(LLVM REQUIRED CONFIG)
+message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
+message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
+llvm_map_components_to_libnames(
+    llvm_libs
+    support
+    core
+)
+
+INCLUDE_DIRECTORIES(
+    include
+    include/cminusfc
+    include/common
+    include/lightir
+    ${LLVM_INCLUDE_DIRS}
+)
+
+add_definitions(${LLVM_DEFINITIONS})
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})
+
+include_directories(${PROJECT_SOURCE_DIR})
+include_directories(${PROJECT_BINARY_DIR})
+add_subdirectory(src)
+add_subdirectory(tests)
diff --git a/README.md b/README.md
index 0097975..a18087c 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,11 @@
-This is 2025 compiler.
\ No newline at end of file
+# 简介
+
+本仓库为 USTC 编译原理和技术 2025 的课程实验仓库。在本学期的编译实验中，你们将构建一个从词法分析器开始到后端代码生成的JIANMU编译器。
+
+你们需要 fork 此 repo 到自己的仓库下，随后在自己的仓库中完成实验。
+
+
+## 测试脚本使用方法
+
+eval_lab2.sh: 
+    没有参数，直接运行即可，结果会生成在 eval_result 下
\ No newline at end of file
diff --git a/include/cminusfc/cminusf_builder.hpp b/include/cminusfc/cminusf_builder.hpp
new file mode 100644
index 0000000..30c724b
--- /dev/null
+++ b/include/cminusfc/cminusf_builder.hpp
@@ -0,0 +1,113 @@
+#pragma once
+
+#include "BasicBlock.hpp"
+#include "Constant.hpp"
+#include "Function.hpp"
+#include "IRBuilder.hpp"
+#include "Module.hpp"
+#include "Type.hpp"
+#include "ast.hpp"
+
+#include <map>
+#include <memory>
+
+class Scope {
+  public:
+    // enter a new scope
+    void enter() { inner.emplace_back(); }
+
+    // exit a scope
+    void exit() { inner.pop_back(); }
+
+    bool in_global() { return inner.size() == 1; }
+
+    // push a name to scope
+    // return true if successful
+    // return false if this name already exits
+    bool push(const std::string& name, Value *val) {
+        auto result = inner[inner.size() - 1].insert({name, val});
+        return result.second;
+    }
+
+    Value *find(const std::string& name) {
+        for (auto s = inner.rbegin(); s != inner.rend(); s++) {
+            auto iter = s->find(name);
+            if (iter != s->end()) {
+                return iter->second;
+            }
+        }
+
+        // Name not found: handled here?
+        assert(false && "Name not found in scope");
+
+        return nullptr;
+    }
+
+  private:
+    std::vector<std::map<std::string, Value *>> inner;
+};
+
+class CminusfBuilder : public ASTVisitor {
+  public:
+    CminusfBuilder() {
+        module = std::make_unique<Module>();
+        builder = std::make_unique<IRBuilder>(nullptr, module.get());
+        auto *TyVoid = module->get_void_type();
+        auto *TyInt32 = module->get_int32_type();
+        auto *TyFloat = module->get_float_type();
+
+        auto *input_type = FunctionType::get(TyInt32, {});
+        auto *input_fun = Function::create(input_type, "input", module.get());
+
+        std::vector<Type *> output_params;
+        output_params.push_back(TyInt32);
+        auto *output_type = FunctionType::get(TyVoid, output_params);
+        auto *output_fun = Function::create(output_type, "output", module.get());
+
+        std::vector<Type *> output_float_params;
+        output_float_params.push_back(TyFloat);
+        auto *output_float_type = FunctionType::get(TyVoid, output_float_params);
+        auto *output_float_fun =
+            Function::create(output_float_type, "outputFloat", module.get());
+
+        auto *neg_idx_except_type = FunctionType::get(TyVoid, {});
+        auto *neg_idx_except_fun = Function::create(
+            neg_idx_except_type, "neg_idx_except", module.get());
+
+        scope.enter();
+        scope.push("input", input_fun);
+        scope.push("output", output_fun);
+        scope.push("outputFloat", output_float_fun);
+        scope.push("neg_idx_except", neg_idx_except_fun);
+    }
+
+    std::unique_ptr<Module> getModule() { return std::move(module); }
+
+  private:
+    virtual Value *visit(ASTProgram &) override final;
+    virtual Value *visit(ASTNum &) override final;
+    virtual Value *visit(ASTVarDeclaration &) override final;
+    virtual Value *visit(ASTFunDeclaration &) override final;
+    virtual Value *visit(ASTParam &) override final;
+    virtual Value *visit(ASTCompoundStmt &) override final;
+    virtual Value *visit(ASTExpressionStmt &) override final;
+    virtual Value *visit(ASTSelectionStmt &) override final;
+    virtual Value *visit(ASTIterationStmt &) override final;
+    virtual Value *visit(ASTReturnStmt &) override final;
+    virtual Value *visit(ASTAssignExpression &) override final;
+    virtual Value *visit(ASTSimpleExpression &) override final;
+    virtual Value *visit(ASTAdditiveExpression &) override final;
+    virtual Value *visit(ASTVar &) override final;
+    virtual Value *visit(ASTTerm &) override final;
+    virtual Value *visit(ASTCall &) override final;
+
+    std::unique_ptr<IRBuilder> builder;
+    Scope scope;
+    std::unique_ptr<Module> module;
+
+    struct {
+        // function that is being built
+        Function *func = nullptr;
+        // TODO: you should add more fields to store state
+    } context;
+};
diff --git a/include/common/ast.hpp b/include/common/ast.hpp
new file mode 100644
index 0000000..5609441
--- /dev/null
+++ b/include/common/ast.hpp
@@ -0,0 +1,256 @@
+#pragma once
+
+#include <cstdarg>
+extern "C" {
+#include "syntax_tree.h"
+extern syntax_tree *parse(const char *input);
+}
+#include "User.hpp"
+#include <memory>
+#include <string>
+#include <vector>
+
+enum CminusType { TYPE_INT, TYPE_FLOAT, TYPE_VOID };
+
+enum RelOp {
+    // <=
+    OP_LE,
+    // <
+    OP_LT,
+    // >
+    OP_GT,
+    // >=
+    OP_GE,
+    // ==
+    OP_EQ,
+    // !=
+    OP_NEQ
+};
+
+enum AddOp {
+    // +
+    OP_PLUS,
+    // -
+    OP_MINUS
+};
+
+enum MulOp {
+    // *
+    OP_MUL,
+    // /
+    OP_DIV
+};
+
+class AST;
+
+struct ASTNode;
+struct ASTProgram;
+struct ASTDeclaration;
+struct ASTNum;
+struct ASTVarDeclaration;
+struct ASTFunDeclaration;
+struct ASTParam;
+
+struct ASTCompoundStmt;
+struct ASTStatement;
+struct ASTExpressionStmt;
+struct ASTSelectionStmt;
+struct ASTIterationStmt;
+struct ASTReturnStmt;
+struct ASTFactor;
+struct ASTExpression;
+struct ASTVar;
+struct ASTAssignExpression;
+struct ASTSimpleExpression;
+struct ASTAdditiveExpression;
+struct ASTTerm;
+struct ASTCall;
+
+class ASTVisitor;
+
+class AST {
+  public:
+    AST() = delete;
+    AST(syntax_tree *);
+    AST(AST &&tree) {
+        root = tree.root;
+        tree.root = nullptr;
+    };
+    ASTProgram *get_root() { return root.get(); }
+    void run_visitor(ASTVisitor &visitor);
+
+  private:
+    ASTNode *transform_node_iter(syntax_tree_node *);
+    std::shared_ptr<ASTProgram> root = nullptr;
+};
+
+struct ASTNode {
+    virtual Value* accept(ASTVisitor &) = 0;
+    virtual ~ASTNode() = default;
+};
+
+struct ASTProgram : ASTNode {
+    virtual Value* accept(ASTVisitor &) override final;
+    virtual ~ASTProgram() = default;
+    std::vector<std::shared_ptr<ASTDeclaration>> declarations;
+};
+
+struct ASTDeclaration : ASTNode {
+    virtual ~ASTDeclaration() = default;
+    CminusType type;
+    std::string id;
+};
+
+struct ASTFactor : ASTNode {
+    virtual ~ASTFactor() = default;
+};
+
+struct ASTNum : ASTFactor {
+    virtual Value* accept(ASTVisitor &) override final;
+    CminusType type;
+    union {
+        int i_val;
+        float f_val;
+    };
+};
+
+struct ASTVarDeclaration : ASTDeclaration {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::shared_ptr<ASTNum> num;
+};
+
+struct ASTFunDeclaration : ASTDeclaration {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::vector<std::shared_ptr<ASTParam>> params;
+    std::shared_ptr<ASTCompoundStmt> compound_stmt;
+};
+
+struct ASTParam : ASTNode {
+    virtual Value* accept(ASTVisitor &) override final;
+    CminusType type;
+    std::string id;
+    // true if it is array param
+    bool isarray;
+};
+
+struct ASTStatement : ASTNode {
+    virtual ~ASTStatement() = default;
+};
+
+struct ASTCompoundStmt : ASTStatement {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::vector<std::shared_ptr<ASTVarDeclaration>> local_declarations;
+    std::vector<std::shared_ptr<ASTStatement>> statement_list;
+};
+
+struct ASTExpressionStmt : ASTStatement {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::shared_ptr<ASTExpression> expression;
+};
+
+struct ASTSelectionStmt : ASTStatement {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::shared_ptr<ASTExpression> expression;
+    std::shared_ptr<ASTStatement> if_statement;
+    // should be nullptr if no else structure exists
+    std::shared_ptr<ASTStatement> else_statement;
+};
+
+struct ASTIterationStmt : ASTStatement {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::shared_ptr<ASTExpression> expression;
+    std::shared_ptr<ASTStatement> statement;
+};
+
+struct ASTReturnStmt : ASTStatement {
+    virtual Value* accept(ASTVisitor &) override final;
+    // should be nullptr if return void
+    std::shared_ptr<ASTExpression> expression;
+};
+
+struct ASTExpression : ASTFactor {};
+
+struct ASTAssignExpression : ASTExpression {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::shared_ptr<ASTVar> var;
+    std::shared_ptr<ASTExpression> expression;
+};
+
+struct ASTSimpleExpression : ASTExpression {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::shared_ptr<ASTAdditiveExpression> additive_expression_l;
+    std::shared_ptr<ASTAdditiveExpression> additive_expression_r;
+    RelOp op;
+};
+
+struct ASTVar : ASTFactor {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::string id;
+    // nullptr if var is of int type
+    std::shared_ptr<ASTExpression> expression;
+};
+
+struct ASTAdditiveExpression : ASTNode {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::shared_ptr<ASTAdditiveExpression> additive_expression;
+    AddOp op;
+    std::shared_ptr<ASTTerm> term;
+};
+
+struct ASTTerm : ASTNode {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::shared_ptr<ASTTerm> term;
+    MulOp op;
+    std::shared_ptr<ASTFactor> factor;
+};
+
+struct ASTCall : ASTFactor {
+    virtual Value* accept(ASTVisitor &) override final;
+    std::string id;
+    std::vector<std::shared_ptr<ASTExpression>> args;
+};
+
+class ASTVisitor {
+  public:
+    virtual Value* visit(ASTProgram &) = 0;
+    virtual Value* visit(ASTNum &) = 0;
+    virtual Value* visit(ASTVarDeclaration &) = 0;
+    virtual Value* visit(ASTFunDeclaration &) = 0;
+    virtual Value* visit(ASTParam &) = 0;
+    virtual Value* visit(ASTCompoundStmt &) = 0;
+    virtual Value* visit(ASTExpressionStmt &) = 0;
+    virtual Value* visit(ASTSelectionStmt &) = 0;
+    virtual Value* visit(ASTIterationStmt &) = 0;
+    virtual Value* visit(ASTReturnStmt &) = 0;
+    virtual Value* visit(ASTAssignExpression &) = 0;
+    virtual Value* visit(ASTSimpleExpression &) = 0;
+    virtual Value* visit(ASTAdditiveExpression &) = 0;
+    virtual Value* visit(ASTVar &) = 0;
+    virtual Value* visit(ASTTerm &) = 0;
+    virtual Value* visit(ASTCall &) = 0;
+};
+
+class ASTPrinter : public ASTVisitor {
+  public:
+    virtual Value* visit(ASTProgram &) override final;
+    virtual Value* visit(ASTNum &) override final;
+    virtual Value* visit(ASTVarDeclaration &) override final;
+    virtual Value* visit(ASTFunDeclaration &) override final;
+    virtual Value* visit(ASTParam &) override final;
+    virtual Value* visit(ASTCompoundStmt &) override final;
+    virtual Value* visit(ASTExpressionStmt &) override final;
+    virtual Value* visit(ASTSelectionStmt &) override final;
+    virtual Value* visit(ASTIterationStmt &) override final;
+    virtual Value* visit(ASTReturnStmt &) override final;
+    virtual Value* visit(ASTAssignExpression &) override final;
+    virtual Value* visit(ASTSimpleExpression &) override final;
+    virtual Value* visit(ASTAdditiveExpression &) override final;
+    virtual Value* visit(ASTVar &) override final;
+    virtual Value* visit(ASTTerm &) override final;
+    virtual Value* visit(ASTCall &) override final;
+    void add_depth() { depth += 2; }
+    void remove_depth() { depth -= 2; }
+
+  private:
+    int depth = 0;
+};
diff --git a/include/common/logging.hpp b/include/common/logging.hpp
new file mode 100644
index 0000000..d70ac41
--- /dev/null
+++ b/include/common/logging.hpp
@@ -0,0 +1,69 @@
+#ifndef LOGGING_HPP
+#define LOGGING_HPP
+
+#include <cstdlib>
+#include <iostream>
+#include <sstream>
+
+enum LogLevel { DEBUG = 0, INFO, WARNING, ERROR };
+struct LocationInfo {
+    LocationInfo(std::string file, int line, const char *func)
+        : file_(file), line_(line), func_(func) {}
+    ~LocationInfo() = default;
+
+    std::string file_;
+    int line_;
+    const char *func_;
+};
+class LogStream;
+class LogWriter;
+
+class LogWriter {
+  public:
+    LogWriter(LocationInfo location, LogLevel loglevel)
+        : location_(location), log_level_(loglevel) {
+        char *logv = std::getenv("LOGV");
+        if (logv) {
+            std::string string_logv = logv;
+            env_log_level = std::stoi(logv);
+        } else {
+            env_log_level = 4;
+        }
+    };
+
+    void operator<(const LogStream &stream);
+
+  private:
+    void output_log(const std::ostringstream &g);
+    LocationInfo location_;
+    LogLevel log_level_;
+    int env_log_level;
+};
+
+class LogStream {
+  public:
+    template <typename T> LogStream &operator<<(const T &val) noexcept {
+        sstream_ << val;
+        return *this;
+    }
+
+    friend class LogWriter;
+
+  private:
+    std::stringstream sstream_{};
+};
+
+std::string level2string(LogLevel level);
+std::string get_short_name(const char *file_path);
+
+#define __FILESHORTNAME__ get_short_name(__FILE__)
+#define LOG_IF(level)                                                          \
+    LogWriter(LocationInfo(__FILESHORTNAME__, __LINE__, __FUNCTION__),         \
+              level) < LogStream()
+#define LOG(level) LOG_##level
+#define LOG_DEBUG LOG_IF(DEBUG)
+#define LOG_INFO LOG_IF(INFO)
+#define LOG_WARNING LOG_IF(WARNING)
+#define LOG_ERROR LOG_IF(ERROR)
+
+#endif
diff --git a/include/common/syntax_tree.h b/include/common/syntax_tree.h
new file mode 100644
index 0000000..78ec91c
--- /dev/null
+++ b/include/common/syntax_tree.h
@@ -0,0 +1,31 @@
+#ifndef __SYNTAXTREE_H__
+#define __SYNTAXTREE_H__
+
+#include <stdio.h>
+
+#define SYNTAX_TREE_NODE_NAME_MAX 30
+
+struct _syntax_tree_node {
+    struct _syntax_tree_node *parent;
+    struct _syntax_tree_node *children[10];
+    int children_num;
+
+    char name[SYNTAX_TREE_NODE_NAME_MAX];
+};
+typedef struct _syntax_tree_node syntax_tree_node;
+
+syntax_tree_node *new_anon_syntax_tree_node();
+syntax_tree_node *new_syntax_tree_node(const char *name);
+int syntax_tree_add_child(syntax_tree_node *parent, syntax_tree_node *child);
+void del_syntax_tree_node(syntax_tree_node *node, int recursive);
+
+struct _syntax_tree {
+    syntax_tree_node *root;
+};
+typedef struct _syntax_tree syntax_tree;
+
+syntax_tree *new_syntax_tree();
+void del_syntax_tree(syntax_tree *tree);
+void print_syntax_tree(FILE *fout, syntax_tree *tree);
+
+#endif /* SyntaxTree.h */
diff --git a/include/lightir/BasicBlock.hpp b/include/lightir/BasicBlock.hpp
new file mode 100644
index 0000000..1d1d3e1
--- /dev/null
+++ b/include/lightir/BasicBlock.hpp
@@ -0,0 +1,64 @@
+#pragma once
+
+#include "Instruction.hpp"
+#include "Value.hpp"
+
+#include <list>
+#include <llvm/ADT/ilist.h>
+#include <llvm/ADT/ilist_node.h>
+#include <set>
+#include <string>
+
+class Function;
+class Instruction;
+class Module;
+
+class BasicBlock : public Value, public llvm::ilist_node<BasicBlock> {
+  public:
+    ~BasicBlock() = default;
+    static BasicBlock *create(Module *m, const std::string &name,
+                              Function *parent) {
+        auto prefix = name.empty() ? "" : "label_";
+        return new BasicBlock(m, prefix + name, parent);
+    }
+
+    /****************api about cfg****************/
+    std::list<BasicBlock *> &get_pre_basic_blocks() { return pre_bbs_; }
+    std::list<BasicBlock *> &get_succ_basic_blocks() { return succ_bbs_; }
+
+    void add_pre_basic_block(BasicBlock *bb) { pre_bbs_.push_back(bb); }
+    void add_succ_basic_block(BasicBlock *bb) { succ_bbs_.push_back(bb); }
+    void remove_pre_basic_block(BasicBlock *bb) { pre_bbs_.remove(bb); }
+    void remove_succ_basic_block(BasicBlock *bb) { succ_bbs_.remove(bb); }
+
+    // If the Block is terminated by ret/br
+    bool is_terminated() const;
+    // Get terminator, only accept valid case use
+    Instruction *get_terminator();
+
+    /****************api about Instruction****************/
+    void add_instruction(Instruction *instr);
+    void add_instr_begin(Instruction *instr) { instr_list_.push_front(instr); }
+    void erase_instr(Instruction *instr) { instr_list_.erase(instr); }
+    void remove_instr(Instruction *instr) { instr_list_.remove(instr); }
+
+    llvm::ilist<Instruction> &get_instructions() { return instr_list_; }
+    bool empty() const { return instr_list_.empty(); }
+    int get_num_of_instr() const { return instr_list_.size(); }
+
+    /****************api about accessing parent****************/
+    Function *get_parent() { return parent_; }
+    Module *get_module();
+    void erase_from_parent();
+
+    virtual std::string print() override;
+
+  private:
+    BasicBlock(const BasicBlock &) = delete;
+    explicit BasicBlock(Module *m, const std::string &name, Function *parent);
+
+    std::list<BasicBlock *> pre_bbs_;
+    std::list<BasicBlock *> succ_bbs_;
+    llvm::ilist<Instruction> instr_list_;
+    Function *parent_;
+};
diff --git a/include/lightir/Constant.hpp b/include/lightir/Constant.hpp
new file mode 100644
index 0000000..786a00e
--- /dev/null
+++ b/include/lightir/Constant.hpp
@@ -0,0 +1,64 @@
+#pragma once
+
+#include "Type.hpp"
+#include "User.hpp"
+#include "Value.hpp"
+
+class Constant : public User {
+  private:
+    // int value;
+  public:
+    Constant(Type *ty, const std::string &name = "") : User(ty, name) {}
+    ~Constant() = default;
+};
+
+class ConstantInt : public Constant {
+  private:
+    int value_;
+    ConstantInt(Type *ty, int val) : Constant(ty, ""), value_(val) {}
+
+  public:
+    int get_value() { return value_; }
+    static ConstantInt *get(int val, Module *m);
+    static ConstantInt *get(bool val, Module *m);
+    virtual std::string print() override;
+};
+
+class ConstantArray : public Constant {
+  private:
+    std::vector<Constant *> const_array;
+
+    ConstantArray(ArrayType *ty, const std::vector<Constant *> &val);
+
+  public:
+    ~ConstantArray() = default;
+
+    Constant *get_element_value(int index);
+
+    unsigned get_size_of_array() { return const_array.size(); }
+
+    static ConstantArray *get(ArrayType *ty,
+                              const std::vector<Constant *> &val);
+
+    virtual std::string print() override;
+};
+
+class ConstantZero : public Constant {
+  private:
+    ConstantZero(Type *ty) : Constant(ty, "") {}
+
+  public:
+    static ConstantZero *get(Type *ty, Module *m);
+    virtual std::string print() override;
+};
+
+class ConstantFP : public Constant {
+  private:
+    float val_;
+    ConstantFP(Type *ty, float val) : Constant(ty, ""), val_(val) {}
+
+  public:
+    static ConstantFP *get(float val, Module *m);
+    float get_value() { return val_; }
+    virtual std::string print() override;
+};
diff --git a/include/lightir/Function.hpp b/include/lightir/Function.hpp
new file mode 100644
index 0000000..c7825e7
--- /dev/null
+++ b/include/lightir/Function.hpp
@@ -0,0 +1,80 @@
+#pragma once
+
+#include "BasicBlock.hpp"
+#include "Type.hpp"
+#include "User.hpp"
+
+#include <cassert>
+#include <cstddef>
+#include <iterator>
+#include <list>
+#include <llvm/ADT/ilist.h>
+#include <llvm/ADT/ilist_node.h>
+#include <map>
+#include <memory>
+
+class Module;
+class Argument;
+class Type;
+class FunctionType;
+
+class Function : public Value, public llvm::ilist_node<Function> {
+  public:
+    Function(const Function &) = delete;
+    Function(FunctionType *ty, const std::string &name, Module *parent);
+    ~Function() = default;
+    static Function *create(FunctionType *ty, const std::string &name,
+                            Module *parent);
+
+    FunctionType *get_function_type() const;
+    Type *get_return_type() const;
+
+    void add_basic_block(BasicBlock *bb);
+
+    unsigned get_num_of_args() const;
+    unsigned get_num_basic_blocks() const;
+
+    Module *get_parent() const;
+
+    void remove(BasicBlock *bb);
+    BasicBlock *get_entry_block() { return &*basic_blocks_.begin(); }
+
+    llvm::ilist<BasicBlock> &get_basic_blocks() { return basic_blocks_; }
+    std::list<Argument> &get_args() { return arguments_; }
+
+    bool is_declaration() { return basic_blocks_.empty(); }
+
+    void set_instr_name();
+    std::string print();
+
+  private:
+    llvm::ilist<BasicBlock> basic_blocks_;
+    std::list<Argument> arguments_;
+    Module *parent_;
+    unsigned seq_cnt_; // print use
+};
+
+// Argument of Function, does not contain actual value
+class Argument : public Value {
+  public:
+    Argument(const Argument &) = delete;
+    explicit Argument(Type *ty, const std::string &name = "",
+                      Function *f = nullptr, unsigned arg_no = 0)
+        : Value(ty, name), parent_(f), arg_no_(arg_no) {}
+    virtual ~Argument() {}
+
+    inline const Function *get_parent() const { return parent_; }
+    inline Function *get_parent() { return parent_; }
+
+    /// For example in "void foo(int a, float b)" a is 0 and b is 1.
+    unsigned get_arg_no() const {
+        assert(parent_ && "can't get number of unparented arg");
+        return arg_no_;
+    }
+
+    virtual std::string print() override;
+
+  private:
+    Function *parent_;
+    unsigned arg_no_; // argument No.
+};
diff --git a/include/lightir/GlobalVariable.hpp b/include/lightir/GlobalVariable.hpp
new file mode 100644
index 0000000..50c0891
--- /dev/null
+++ b/include/lightir/GlobalVariable.hpp
@@ -0,0 +1,23 @@
+#pragma once
+
+#include "Constant.hpp"
+#include "User.hpp"
+
+#include <llvm/ADT/ilist_node.h>
+class Module;
+class GlobalVariable : public User, public llvm::ilist_node<GlobalVariable> {
+  private:
+    bool is_const_;
+    Constant *init_val_;
+    GlobalVariable(std::string name, Module *m, Type *ty, bool is_const,
+                   Constant *init = nullptr);
+
+  public:
+    GlobalVariable(const GlobalVariable &) = delete;
+    static GlobalVariable *create(std::string name, Module *m, Type *ty,
+                                  bool is_const, Constant *init);
+    virtual ~GlobalVariable() = default;
+    Constant *get_init() { return init_val_; }
+    bool is_const() { return is_const_; }
+    std::string print();
+};
diff --git a/include/lightir/IRBuilder.hpp b/include/lightir/IRBuilder.hpp
new file mode 100644
index 0000000..7774641
--- /dev/null
+++ b/include/lightir/IRBuilder.hpp
@@ -0,0 +1,131 @@
+#pragma once
+
+#include "BasicBlock.hpp"
+#include "Function.hpp"
+#include "Instruction.hpp"
+#include "Value.hpp"
+
+class IRBuilder {
+  private:
+    BasicBlock *BB_;
+    Module *m_;
+
+  public:
+    IRBuilder(BasicBlock *bb, Module *m) : BB_(bb), m_(m){};
+    ~IRBuilder() = default;
+    Module *get_module() { return m_; }
+    BasicBlock *get_insert_block() { return this->BB_; }
+    void set_insert_point(BasicBlock *bb) {
+        this->BB_ = bb;
+    } // 在某个基本块中插入指令
+    IBinaryInst *create_iadd(Value *lhs, Value *rhs) {
+        return IBinaryInst::create_add(lhs, rhs, this->BB_);
+    } // 创建加法指令（以及其他算术指令）
+    IBinaryInst *create_isub(Value *lhs, Value *rhs) {
+        return IBinaryInst::create_sub(lhs, rhs, this->BB_);
+    }
+    IBinaryInst *create_imul(Value *lhs, Value *rhs) {
+        return IBinaryInst::create_mul(lhs, rhs, this->BB_);
+    }
+    IBinaryInst *create_isdiv(Value *lhs, Value *rhs) {
+        return IBinaryInst::create_sdiv(lhs, rhs, this->BB_);
+    }
+
+    ICmpInst *create_icmp_eq(Value *lhs, Value *rhs) {
+        return ICmpInst::create_eq(lhs, rhs, this->BB_);
+    }
+    ICmpInst *create_icmp_ne(Value *lhs, Value *rhs) {
+        return ICmpInst::create_ne(lhs, rhs, this->BB_);
+    }
+    ICmpInst *create_icmp_gt(Value *lhs, Value *rhs) {
+        return ICmpInst::create_gt(lhs, rhs, this->BB_);
+    }
+    ICmpInst *create_icmp_ge(Value *lhs, Value *rhs) {
+        return ICmpInst::create_ge(lhs, rhs, this->BB_);
+    }
+    ICmpInst *create_icmp_lt(Value *lhs, Value *rhs) {
+        return ICmpInst::create_lt(lhs, rhs, this->BB_);
+    }
+    ICmpInst *create_icmp_le(Value *lhs, Value *rhs) {
+        return ICmpInst::create_le(lhs, rhs, this->BB_);
+    }
+
+    CallInst *create_call(Value *func, std::vector<Value *> args) {
+        return CallInst::create_call(static_cast<Function *>(func), args,
+                                     this->BB_);
+    }
+
+    BranchInst *create_br(BasicBlock *if_true) {
+        return BranchInst::create_br(if_true, this->BB_);
+    }
+    BranchInst *create_cond_br(Value *cond, BasicBlock *if_true,
+                               BasicBlock *if_false) {
+        return BranchInst::create_cond_br(cond, if_true, if_false, this->BB_);
+    }
+
+    ReturnInst *create_ret(Value *val) {
+        return ReturnInst::create_ret(val, this->BB_);
+    }
+    ReturnInst *create_void_ret() {
+        return ReturnInst::create_void_ret(this->BB_);
+    }
+
+    GetElementPtrInst *create_gep(Value *ptr, std::vector<Value *> idxs) {
+        return GetElementPtrInst::create_gep(ptr, idxs, this->BB_);
+    }
+
+    StoreInst *create_store(Value *val, Value *ptr) {
+        return StoreInst::create_store(val, ptr, this->BB_);
+    }
+    LoadInst *create_load(Value *ptr) {
+        assert(ptr->get_type()->is_pointer_type() &&
+               "ptr must be pointer type");
+        return LoadInst::create_load(ptr, this->BB_);
+    }
+
+    AllocaInst *create_alloca(Type *ty) {
+        return AllocaInst::create_alloca(ty, this->BB_);
+    }
+    ZextInst *create_zext(Value *val, Type *ty) {
+        return ZextInst::create_zext(val, ty, this->BB_);
+    }
+
+    SiToFpInst *create_sitofp(Value *val, Type *ty) {
+        return SiToFpInst::create_sitofp(val, this->BB_);
+    }
+    FpToSiInst *create_fptosi(Value *val, Type *ty) {
+        return FpToSiInst::create_fptosi(val, ty, this->BB_);
+    }
+
+    FCmpInst *create_fcmp_ne(Value *lhs, Value *rhs) {
+        return FCmpInst::create_fne(lhs, rhs, this->BB_);
+    }
+    FCmpInst *create_fcmp_lt(Value *lhs, Value *rhs) {
+        return FCmpInst::create_flt(lhs, rhs, this->BB_);
+    }
+    FCmpInst *create_fcmp_le(Value *lhs, Value *rhs) {
+        return FCmpInst::create_fle(lhs, rhs, this->BB_);
+    }
+    FCmpInst *create_fcmp_ge(Value *lhs, Value *rhs) {
+        return FCmpInst::create_fge(lhs, rhs, this->BB_);
+    }
+    FCmpInst *create_fcmp_gt(Value *lhs, Value *rhs) {
+        return FCmpInst::create_fgt(lhs, rhs, this->BB_);
+    }
+    FCmpInst *create_fcmp_eq(Value *lhs, Value *rhs) {
+        return FCmpInst::create_feq(lhs, rhs, this->BB_);
+    }
+
+    FBinaryInst *create_fadd(Value *lhs, Value *rhs) {
+        return FBinaryInst::create_fadd(lhs, rhs, this->BB_);
+    }
+    FBinaryInst *create_fsub(Value *lhs, Value *rhs) {
+        return FBinaryInst::create_fsub(lhs, rhs, this->BB_);
+    }
+    FBinaryInst *create_fmul(Value *lhs, Value *rhs) {
+        return FBinaryInst::create_fmul(lhs, rhs, this->BB_);
+    }
+    FBinaryInst *create_fdiv(Value *lhs, Value *rhs) {
+        return FBinaryInst::create_fdiv(lhs, rhs, this->BB_);
+    }
+};
diff --git a/include/lightir/IRprinter.hpp b/include/lightir/IRprinter.hpp
new file mode 100644
index 0000000..be4f965
--- /dev/null
+++ b/include/lightir/IRprinter.hpp
@@ -0,0 +1,14 @@
+#pragma once
+
+#include "BasicBlock.hpp"
+#include "Constant.hpp"
+#include "Function.hpp"
+#include "GlobalVariable.hpp"
+#include "Instruction.hpp"
+#include "Module.hpp"
+#include "Type.hpp"
+#include "User.hpp"
+#include "Value.hpp"
+
+std::string print_as_op(Value *v, bool print_ty);
+std::string print_instr_op_name(Instruction::OpID);
diff --git a/include/lightir/Instruction.hpp b/include/lightir/Instruction.hpp
new file mode 100644
index 0000000..184ebd5
--- /dev/null
+++ b/include/lightir/Instruction.hpp
@@ -0,0 +1,369 @@
+#pragma once
+
+#include "Type.hpp"
+#include "User.hpp"
+
+#include <cstdint>
+#include <llvm/ADT/ilist_node.h>
+
+class BasicBlock;
+class Function;
+
+class Instruction : public User, public llvm::ilist_node<Instruction> {
+  public:
+    enum OpID : uint32_t {
+        // Terminator Instructions
+        ret,
+        br,
+        // Standard binary operators
+        add,
+        sub,
+        mul,
+        sdiv,
+        // float binary operators
+        fadd,
+        fsub,
+        fmul,
+        fdiv,
+        // Memory operators
+        alloca,
+        load,
+        store,
+        // Int compare operators
+        ge,
+        gt,
+        le,
+        lt,
+        eq,
+        ne,
+        // Float compare operators
+        fge,
+        fgt,
+        fle,
+        flt,
+        feq,
+        fne,
+        // Other operators
+        phi,
+        call,
+        getelementptr,
+        zext, // zero extend
+        fptosi,
+        sitofp
+        // float binary operators Logical operators
+
+    };
+    /* @parent: if parent!=nullptr, auto insert to bb
+     * @ty: result type */
+    Instruction(Type *ty, OpID id, BasicBlock *parent = nullptr);
+    Instruction(const Instruction &) = delete;
+    virtual ~Instruction() = default;
+
+    BasicBlock *get_parent() { return parent_; }
+    const BasicBlock *get_parent() const { return parent_; }
+    void set_parent(BasicBlock *parent) { this->parent_ = parent; }
+
+    // Return the function this instruction belongs to.
+    Function *get_function();
+    Module *get_module();
+
+    OpID get_instr_type() const { return op_id_; }
+    std::string get_instr_op_name() const;
+
+    bool is_void() {
+        return ((op_id_ == ret) || (op_id_ == br) || (op_id_ == store) ||
+                (op_id_ == call && this->get_type()->is_void_type()));
+    }
+
+    bool is_phi() const { return op_id_ == phi; }
+    bool is_store() const { return op_id_ == store; }
+    bool is_alloca() const { return op_id_ == alloca; }
+    bool is_ret() const { return op_id_ == ret; }
+    bool is_load() const { return op_id_ == load; }
+    bool is_br() const { return op_id_ == br; }
+
+    bool is_add() const { return op_id_ == add; }
+    bool is_sub() const { return op_id_ == sub; }
+    bool is_mul() const { return op_id_ == mul; }
+    bool is_div() const { return op_id_ == sdiv; }
+
+    bool is_fadd() const { return op_id_ == fadd; }
+    bool is_fsub() const { return op_id_ == fsub; }
+    bool is_fmul() const { return op_id_ == fmul; }
+    bool is_fdiv() const { return op_id_ == fdiv; }
+    bool is_fp2si() const { return op_id_ == fptosi; }
+    bool is_si2fp() const { return op_id_ == sitofp; }
+
+    bool is_cmp() const { return ge <= op_id_ and op_id_ <= ne; }
+    bool is_fcmp() const { return fge <= op_id_ and op_id_ <= fne; }
+
+    bool is_call() const { return op_id_ == call; }
+    bool is_gep() const { return op_id_ == getelementptr; }
+    bool is_zext() const { return op_id_ == zext; }
+
+    bool isBinary() const {
+        return (is_add() || is_sub() || is_mul() || is_div() || is_fadd() ||
+                is_fsub() || is_fmul() || is_fdiv()) &&
+               (get_num_operand() == 2);
+    }
+
+    bool isTerminator() const { return is_br() || is_ret(); }
+
+  private:
+    OpID op_id_;
+    BasicBlock *parent_;
+};
+
+template <typename Inst> class BaseInst : public Instruction {
+  protected:
+    template <typename... Args> static Inst *create(Args &&...args) {
+        return new Inst(std::forward<Args>(args)...);
+    }
+
+    template <typename... Args>
+    BaseInst(Args &&...args) : Instruction(std::forward<Args>(args)...) {}
+};
+
+class IBinaryInst : public BaseInst<IBinaryInst> {
+    friend BaseInst<IBinaryInst>;
+
+  private:
+    IBinaryInst(OpID id, Value *v1, Value *v2, BasicBlock *bb);
+
+  public:
+    static IBinaryInst *create_add(Value *v1, Value *v2, BasicBlock *bb);
+    static IBinaryInst *create_sub(Value *v1, Value *v2, BasicBlock *bb);
+    static IBinaryInst *create_mul(Value *v1, Value *v2, BasicBlock *bb);
+    static IBinaryInst *create_sdiv(Value *v1, Value *v2, BasicBlock *bb);
+
+    virtual std::string print() override;
+};
+
+class FBinaryInst : public BaseInst<FBinaryInst> {
+    friend BaseInst<FBinaryInst>;
+
+  private:
+    FBinaryInst(OpID id, Value *v1, Value *v2, BasicBlock *bb);
+
+  public:
+    static FBinaryInst *create_fadd(Value *v1, Value *v2, BasicBlock *bb);
+    static FBinaryInst *create_fsub(Value *v1, Value *v2, BasicBlock *bb);
+    static FBinaryInst *create_fmul(Value *v1, Value *v2, BasicBlock *bb);
+    static FBinaryInst *create_fdiv(Value *v1, Value *v2, BasicBlock *bb);
+
+    virtual std::string print() override;
+};
+
+class ICmpInst : public BaseInst<ICmpInst> {
+    friend BaseInst<ICmpInst>;
+
+  private:
+    ICmpInst(OpID id, Value *lhs, Value *rhs, BasicBlock *bb);
+
+  public:
+    static ICmpInst *create_ge(Value *v1, Value *v2, BasicBlock *bb);
+    static ICmpInst *create_gt(Value *v1, Value *v2, BasicBlock *bb);
+    static ICmpInst *create_le(Value *v1, Value *v2, BasicBlock *bb);
+    static ICmpInst *create_lt(Value *v1, Value *v2, BasicBlock *bb);
+    static ICmpInst *create_eq(Value *v1, Value *v2, BasicBlock *bb);
+    static ICmpInst *create_ne(Value *v1, Value *v2, BasicBlock *bb);
+
+    virtual std::string print() override;
+};
+
+class FCmpInst : public BaseInst<FCmpInst> {
+    friend BaseInst<FCmpInst>;
+
+  private:
+    FCmpInst(OpID id, Value *lhs, Value *rhs, BasicBlock *bb);
+
+  public:
+    static FCmpInst *create_fge(Value *v1, Value *v2, BasicBlock *bb);
+    static FCmpInst *create_fgt(Value *v1, Value *v2, BasicBlock *bb);
+    static FCmpInst *create_fle(Value *v1, Value *v2, BasicBlock *bb);
+    static FCmpInst *create_flt(Value *v1, Value *v2, BasicBlock *bb);
+    static FCmpInst *create_feq(Value *v1, Value *v2, BasicBlock *bb);
+    static FCmpInst *create_fne(Value *v1, Value *v2, BasicBlock *bb);
+
+    virtual std::string print() override;
+};
+
+class CallInst : public BaseInst<CallInst> {
+    friend BaseInst<CallInst>;
+
+  protected:
+    CallInst(Function *func, std::vector<Value *> args, BasicBlock *bb);
+
+  public:
+    static CallInst *create_call(Function *func, std::vector<Value *> args,
+                                 BasicBlock *bb);
+    FunctionType *get_function_type() const;
+
+    virtual std::string print() override;
+};
+
+class BranchInst : public BaseInst<BranchInst> {
+    friend BaseInst<BranchInst>;
+
+  private:
+    BranchInst(Value *cond, BasicBlock *if_true, BasicBlock *if_false,
+               BasicBlock *bb);
+    ~BranchInst();
+
+  public:
+    static BranchInst *create_cond_br(Value *cond, BasicBlock *if_true,
+                                      BasicBlock *if_false, BasicBlock *bb);
+    static BranchInst *create_br(BasicBlock *if_true, BasicBlock *bb);
+
+    bool is_cond_br() const { return get_num_operand() == 3; }
+
+    Value *get_condition() const { return get_operand(0); }
+
+    virtual std::string print() override;
+};
+
+class ReturnInst : public BaseInst<ReturnInst> {
+    friend BaseInst<ReturnInst>;
+
+  private:
+    ReturnInst(Value *val, BasicBlock *bb);
+
+  public:
+    static ReturnInst *create_ret(Value *val, BasicBlock *bb);
+    static ReturnInst *create_void_ret(BasicBlock *bb);
+    bool is_void_ret() const;
+
+    virtual std::string print() override;
+};
+
+class GetElementPtrInst : public BaseInst<GetElementPtrInst> {
+    friend BaseInst<GetElementPtrInst>;
+
+  private:
+    GetElementPtrInst(Value *ptr, std::vector<Value *> idxs, BasicBlock *bb);
+
+  public:
+    static Type *get_element_type(Value *ptr, std::vector<Value *> idxs);
+    static GetElementPtrInst *create_gep(Value *ptr, std::vector<Value *> idxs,
+                                         BasicBlock *bb);
+    Type *get_element_type() const;
+
+    virtual std::string print() override;
+};
+
+class StoreInst : public BaseInst<StoreInst> {
+    friend BaseInst<StoreInst>;
+
+  private:
+    StoreInst(Value *val, Value *ptr, BasicBlock *bb);
+
+  public:
+    static StoreInst *create_store(Value *val, Value *ptr, BasicBlock *bb);
+
+    Value *get_rval() { return this->get_operand(0); }
+    Value *get_lval() { return this->get_operand(1); }
+
+    virtual std::string print() override;
+};
+
+class LoadInst : public BaseInst<LoadInst> {
+    friend BaseInst<LoadInst>;
+
+  private:
+    LoadInst(Value *ptr, BasicBlock *bb);
+
+  public:
+    static LoadInst *create_load(Value *ptr, BasicBlock *bb);
+
+    Value *get_lval() const { return this->get_operand(0); }
+    Type *get_load_type() const { return get_type(); };
+
+    virtual std::string print() override;
+};
+
+class AllocaInst : public BaseInst<AllocaInst> {
+    friend BaseInst<AllocaInst>;
+
+  private:
+    AllocaInst(Type *ty, BasicBlock *bb);
+
+  public:
+    static AllocaInst *create_alloca(Type *ty, BasicBlock *bb);
+
+    Type *get_alloca_type() const {
+        return get_type()->get_pointer_element_type();
+    };
+
+    virtual std::string print() override;
+};
+
+class ZextInst : public BaseInst<ZextInst> {
+    friend BaseInst<ZextInst>;
+
+  private:
+    ZextInst(Value *val, Type *ty, BasicBlock *bb);
+
+  public:
+    static ZextInst *create_zext(Value *val, Type *ty, BasicBlock *bb);
+    static ZextInst *create_zext_to_i32(Value *val, BasicBlock *bb);
+
+    Type *get_dest_type() const { return get_type(); };
+
+    virtual std::string print() override;
+};
+
+class FpToSiInst : public BaseInst<FpToSiInst> {
+    friend BaseInst<FpToSiInst>;
+
+  private:
+    FpToSiInst(Value *val, Type *ty, BasicBlock *bb);
+
+  public:
+    static FpToSiInst *create_fptosi(Value *val, Type *ty, BasicBlock *bb);
+    static FpToSiInst *create_fptosi_to_i32(Value *val, BasicBlock *bb);
+
+    Type *get_dest_type() const { return get_type(); };
+
+    virtual std::string print() override;
+};
+
+class SiToFpInst : public BaseInst<SiToFpInst> {
+    friend BaseInst<SiToFpInst>;
+
+  private:
+    SiToFpInst(Value *val, Type *ty, BasicBlock *bb);
+
+  public:
+    static SiToFpInst *create_sitofp(Value *val, BasicBlock *bb);
+
+    Type *get_dest_type() const { return get_type(); };
+
+    virtual std::string print() override;
+};
+
+class PhiInst : public BaseInst<PhiInst> {
+    friend BaseInst<PhiInst>;
+
+  private:
+    PhiInst(Type *ty, std::vector<Value *> vals,
+            std::vector<BasicBlock *> val_bbs, BasicBlock *bb);
+
+  public:
+    static PhiInst *create_phi(Type *ty, BasicBlock *bb,
+                               std::vector<Value *> vals = {},
+                               std::vector<BasicBlock *> val_bbs = {});
+
+    void add_phi_pair_operand(Value *val, Value *pre_bb) {
+        this->add_operand(val);
+        this->add_operand(pre_bb);
+    }
+    std::vector<std::pair<Value *, BasicBlock *>> get_phi_pairs() {
+        std::vector<std::pair<Value *, BasicBlock *>> res;
+        for (size_t i = 0; i < get_num_operand(); i += 2) {
+            res.push_back({this->get_operand(i),
+                           this->get_operand(i + 1)->as<BasicBlock>()});
+        }
+        return res;
+    }
+    virtual std::string print() override;
+};
diff --git a/include/lightir/Module.hpp b/include/lightir/Module.hpp
new file mode 100644
index 0000000..b154b08
--- /dev/null
+++ b/include/lightir/Module.hpp
@@ -0,0 +1,59 @@
+#pragma once
+
+#include "Function.hpp"
+#include "GlobalVariable.hpp"
+#include "Instruction.hpp"
+#include "Type.hpp"
+#include "Value.hpp"
+
+#include <list>
+#include <llvm/ADT/ilist.h>
+#include <llvm/ADT/ilist_node.h>
+#include <map>
+#include <memory>
+#include <string>
+
+class GlobalVariable;
+class Function;
+class Module {
+  public:
+    Module();
+    ~Module() = default;
+
+    Type *get_void_type();
+    Type *get_label_type();
+    IntegerType *get_int1_type();
+    IntegerType *get_int32_type();
+    PointerType *get_int32_ptr_type();
+    FloatType *get_float_type();
+    PointerType *get_float_ptr_type();
+
+    PointerType *get_pointer_type(Type *contained);
+    ArrayType *get_array_type(Type *contained, unsigned num_elements);
+    FunctionType *get_function_type(Type *retty, std::vector<Type *> &args);
+
+    void add_function(Function *f);
+    llvm::ilist<Function> &get_functions();
+    void add_global_variable(GlobalVariable *g);
+    llvm::ilist<GlobalVariable> &get_global_variable();
+
+    void set_print_name();
+    std::string print();
+
+  private:
+    // The global variables in the module
+    llvm::ilist<GlobalVariable> global_list_;
+    // The functions in the module
+    llvm::ilist<Function> function_list_;
+
+    std::unique_ptr<IntegerType> int1_ty_;
+    std::unique_ptr<IntegerType> int32_ty_;
+    std::unique_ptr<Type> label_ty_;
+    std::unique_ptr<Type> void_ty_;
+    std::unique_ptr<FloatType> float32_ty_;
+    std::map<Type *, std::unique_ptr<PointerType>> pointer_map_;
+    std::map<std::pair<Type *, int>, std::unique_ptr<ArrayType>> array_map_;
+    std::map<std::pair<Type *, std::vector<Type *>>,
+             std::unique_ptr<FunctionType>>
+        function_map_;
+};
diff --git a/include/lightir/Type.hpp b/include/lightir/Type.hpp
new file mode 100644
index 0000000..5d456a7
--- /dev/null
+++ b/include/lightir/Type.hpp
@@ -0,0 +1,118 @@
+#pragma once
+
+#include <iostream>
+#include <vector>
+
+class Module;
+class IntegerType;
+class FunctionType;
+class ArrayType;
+class PointerType;
+class FloatType;
+
+class Type {
+  public:
+    enum TypeID {
+        VoidTyID,     // Void
+        LabelTyID,    // Labels, e.g., BasicBlock
+        IntegerTyID,  // Integers, include 32 bits and 1 bit
+        FunctionTyID, // Functions
+        ArrayTyID,    // Arrays
+        PointerTyID,  // Pointer
+        FloatTyID     // float
+    };
+
+    explicit Type(TypeID tid, Module *m);
+    ~Type() = default;
+
+    TypeID get_type_id() const { return tid_; }
+
+    bool is_void_type() const { return get_type_id() == VoidTyID; }
+    bool is_label_type() const { return get_type_id() == LabelTyID; }
+    bool is_integer_type() const { return get_type_id() == IntegerTyID; }
+    bool is_function_type() const { return get_type_id() == FunctionTyID; }
+    bool is_array_type() const { return get_type_id() == ArrayTyID; }
+    bool is_pointer_type() const { return get_type_id() == PointerTyID; }
+    bool is_float_type() const { return get_type_id() == FloatTyID; }
+    bool is_int32_type() const;
+    bool is_int1_type() const;
+
+    // Return related data member if is the required type, else throw error
+    Type *get_pointer_element_type() const;
+    Type *get_array_element_type() const;
+
+    Module *get_module() const { return m_; }
+    unsigned get_size() const;
+
+    std::string print() const;
+
+  private:
+    TypeID tid_;
+    Module *m_;
+};
+
+class IntegerType : public Type {
+  public:
+    explicit IntegerType(unsigned num_bits, Module *m);
+
+    unsigned get_num_bits() const;
+
+  private:
+    unsigned num_bits_;
+};
+
+class FunctionType : public Type {
+  public:
+    FunctionType(Type *result, std::vector<Type *> params);
+
+    static bool is_valid_return_type(Type *ty);
+    static bool is_valid_argument_type(Type *ty);
+
+    static FunctionType *get(Type *result, std::vector<Type *> params);
+
+    unsigned get_num_of_args() const;
+
+    Type *get_param_type(unsigned i) const;
+    std::vector<Type *>::iterator param_begin() { return args_.begin(); }
+    std::vector<Type *>::iterator param_end() { return args_.end(); }
+    Type *get_return_type() const;
+
+  private:
+    Type *result_;
+    std::vector<Type *> args_;
+};
+
+class ArrayType : public Type {
+  public:
+    ArrayType(Type *contained, unsigned num_elements);
+
+    static bool is_valid_element_type(Type *ty);
+
+    static ArrayType *get(Type *contained, unsigned num_elements);
+
+    Type *get_element_type() const { return contained_; }
+    unsigned get_num_of_elements() const { return num_elements_; }
+
+  private:
+    Type *contained_;       // The element type of the array.
+    unsigned num_elements_; // Number of elements in the array.
+};
+
+class PointerType : public Type {
+  public:
+    PointerType(Type *contained);
+    Type *get_element_type() const { return contained_; }
+
+    static PointerType *get(Type *contained);
+
+  private:
+    Type *contained_; // The element type of the ptr.
+};
+
+class FloatType : public Type {
+  public:
+    FloatType(Module *m);
+    static FloatType *get(Module *m);
+
+  private:
+};
diff --git a/include/lightir/User.hpp b/include/lightir/User.hpp
new file mode 100644
index 0000000..50bffc8
--- /dev/null
+++ b/include/lightir/User.hpp
@@ -0,0 +1,41 @@
+#pragma once
+
+#include "Value.hpp"
+
+#include <vector>
+
+class User : public Value {
+  public:
+    User(Type *ty, const std::string &name = "") : Value(ty, name){};
+    virtual ~User() { remove_all_operands(); }
+
+    const std::vector<Value *> &get_operands() const { return operands_; }
+    unsigned get_num_operand() const { return operands_.size(); }
+
+    // start from 0
+    Value *get_operand(unsigned i) const { return operands_.at(i); };
+    // start from 0
+    void set_operand(unsigned i, Value *v);
+    void add_operand(Value *v);
+
+    void remove_all_operands();
+    void remove_operand(unsigned i);
+
+  private:
+    std::vector<Value *> operands_; // operands of this value
+};
+
+/* For example: op = func(a, b)
+ *  for a: Use(op, 0)
+ *  for b: Use(op, 1)
+ */
+struct Use {
+    User *val_;       // used by whom
+    unsigned arg_no_; // the no. of operand
+
+    Use(User *val, unsigned no) : val_(val), arg_no_(no) {}
+
+    bool operator==(const Use &other) const {
+        return val_ == other.val_ and arg_no_ == other.arg_no_;
+    }
+};
diff --git a/include/lightir/Value.hpp b/include/lightir/Value.hpp
new file mode 100644
index 0000000..7e805a5
--- /dev/null
+++ b/include/lightir/Value.hpp
@@ -0,0 +1,60 @@
+#pragma once
+
+#include <functional>
+#include <iostream>
+#include <list>
+#include <string>
+#include <cassert>
+
+class Type;
+class Value;
+class User;
+struct Use;
+
+class Value {
+  public:
+    explicit Value(Type *ty, const std::string &name = "")
+        : type_(ty), name_(name){};
+    virtual ~Value() { replace_all_use_with(nullptr); }
+
+    std::string get_name() const { return name_; };
+    Type *get_type() const { return type_; }
+    const std::list<Use> &get_use_list() const { return use_list_; }
+
+    bool set_name(std::string name);
+
+    void add_use(User *user, unsigned arg_no);
+    void remove_use(User *user, unsigned arg_no);
+
+    void replace_all_use_with(Value *new_val);
+    void replace_use_with_if(Value *new_val, std::function<bool(Use *)> pred);
+
+    virtual std::string print() = 0;
+
+    template<typename T>
+    T *as()
+    {
+      static_assert(std::is_base_of<Value, T>::value, "T must be a subclass of Value");
+      const auto ptr = dynamic_cast<T*>(this);
+      assert(ptr && "dynamic_cast failed");
+      return ptr;
+    }
+    template<typename T>
+    [[nodiscard]] const T* as() const {
+        static_assert(std::is_base_of<Value, T>::value, "T must be a subclass of Value");
+        const auto ptr = dynamic_cast<const T*>(this);
+        assert(ptr);
+        return ptr;
+    }
+    // is 接口
+    template <typename T>
+    [[nodiscard]] bool is() const {
+        static_assert(std::is_base_of<Value, T>::value, "T must be a subclass of Value");
+        return dynamic_cast<const T*>(this);
+    }
+
+  private:
+    Type *type_;
+    std::list<Use> use_list_; // who use this value
+    std::string name_;        // should we put name field here ?
+};
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..a1ec57b
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,6 @@
+add_subdirectory(parser)
+add_subdirectory(common)
+add_subdirectory(logging)
+add_subdirectory(cminusfc)
+add_subdirectory(lightir)
+add_subdirectory(io)
\ No newline at end of file
diff --git a/src/cminusfc/CMakeLists.txt b/src/cminusfc/CMakeLists.txt
new file mode 100644
index 0000000..3e54d07
--- /dev/null
+++ b/src/cminusfc/CMakeLists.txt
@@ -0,0 +1,18 @@
+add_executable(
+    cminusfc
+    main.cpp
+    cminusf_builder.cpp
+)
+
+target_link_libraries(
+    cminusfc
+    IR_lib
+    common
+    syntax
+    stdc++fs
+)
+
+install(
+    TARGETS cminusfc
+    RUNTIME DESTINATION bin
+)
diff --git a/src/cminusfc/cminusf_builder.cpp b/src/cminusfc/cminusf_builder.cpp
new file mode 100644
index 0000000..0360444
--- /dev/null
+++ b/src/cminusfc/cminusf_builder.cpp
@@ -0,0 +1,178 @@
+#include "cminusf_builder.hpp"
+
+#define CONST_FP(num) ConstantFP::get((float)num, module.get())
+#define CONST_INT(num) ConstantInt::get(num, module.get())
+
+// types
+Type *VOID_T;
+Type *INT1_T;
+Type *INT32_T;
+Type *INT32PTR_T;
+Type *FLOAT_T;
+Type *FLOATPTR_T;
+
+/*
+ * use CMinusfBuilder::Scope to construct scopes
+ * scope.enter: enter a new scope
+ * scope.exit: exit current scope
+ * scope.push: add a new binding to current scope
+ * scope.find: find and return the value bound to the name
+ */
+
+Value* CminusfBuilder::visit(ASTProgram &node) {
+    VOID_T = module->get_void_type();
+    INT1_T = module->get_int1_type();
+    INT32_T = module->get_int32_type();
+    INT32PTR_T = module->get_int32_ptr_type();
+    FLOAT_T = module->get_float_type();
+    FLOATPTR_T = module->get_float_ptr_type();
+
+    Value *ret_val = nullptr;
+    for (auto &decl : node.declarations) {
+        ret_val = decl->accept(*this);
+    }
+    return ret_val;
+}
+
+Value* CminusfBuilder::visit(ASTNum &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTVarDeclaration &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTFunDeclaration &node) {
+    FunctionType *fun_type;
+    Type *ret_type;
+    std::vector<Type *> param_types;
+    if (node.type == TYPE_INT)
+        ret_type = INT32_T;
+    else if (node.type == TYPE_FLOAT)
+        ret_type = FLOAT_T;
+    else
+        ret_type = VOID_T;
+
+    for (auto &param : node.params) {
+        // TODO: Please accomplish param_types.
+    }
+
+    fun_type = FunctionType::get(ret_type, param_types);
+    auto func = Function::create(fun_type, node.id, module.get());
+    scope.push(node.id, func);
+    context.func = func;
+    auto funBB = BasicBlock::create(module.get(), "entry", func);
+    builder->set_insert_point(funBB);
+    scope.enter();
+    std::vector<Value *> args;
+    for (auto &arg : func->get_args()) {
+        args.push_back(&arg);
+    }
+    for (unsigned int i = 0; i < node.params.size(); ++i) {
+        // TODO: You need to deal with params and store them in the scope.
+    }
+    node.compound_stmt->accept(*this);
+    if (not builder->get_insert_block()->is_terminated()) 
+    {
+        if (context.func->get_return_type()->is_void_type())
+            builder->create_void_ret();
+        else if (context.func->get_return_type()->is_float_type())
+            builder->create_ret(CONST_FP(0.));
+        else
+            builder->create_ret(CONST_INT(0));
+    }
+    scope.exit();
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTParam &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTCompoundStmt &node) {
+    // TODO: This function is not complete.
+    // You may need to add some code here
+    // to deal with complex statements. 
+    
+    for (auto &decl : node.local_declarations) {
+        decl->accept(*this);
+    }
+
+    for (auto &stmt : node.statement_list) {
+        stmt->accept(*this);
+        if (builder->get_insert_block()->is_terminated())
+            break;
+    }
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTExpressionStmt &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTSelectionStmt &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTIterationStmt &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTReturnStmt &node) {
+    if (node.expression == nullptr) {
+        builder->create_void_ret();
+        return nullptr;
+    } else {
+        // TODO: The given code is incomplete.
+        // You need to solve other return cases (e.g. return an integer).
+    }
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTVar &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTAssignExpression &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTSimpleExpression &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTAdditiveExpression &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTTerm &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
+
+Value* CminusfBuilder::visit(ASTCall &node) {
+    // TODO: This function is empty now.
+    // Add some code here.
+    return nullptr;
+}
diff --git a/src/cminusfc/main.cpp b/src/cminusfc/main.cpp
new file mode 100644
index 0000000..456ec38
--- /dev/null
+++ b/src/cminusfc/main.cpp
@@ -0,0 +1,117 @@
+#include "Module.hpp"
+#include "ast.hpp"
+#include "cminusf_builder.hpp"
+
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <string>
+
+using std::string;
+using std::operator""s;
+
+struct Config {
+    string exe_name; // compiler exe name
+    std::filesystem::path input_file;
+    std::filesystem::path output_file;
+
+    bool emitast{false};
+    bool emitllvm{false};
+
+    Config(int argc, char **argv) : argc(argc), argv(argv) {
+        parse_cmd_line();
+        check();
+    }
+
+  private:
+    int argc{-1};
+    char **argv{nullptr};
+
+    void parse_cmd_line();
+    void check();
+    // print helper infomation and exit
+    void print_help() const;
+    void print_err(const string &msg) const;
+};
+
+int main(int argc, char **argv) {
+    Config config(argc, argv);
+
+    auto syntax_tree = parse(config.input_file.c_str());
+    auto ast = AST(syntax_tree);
+
+    if (config.emitast) { // if emit ast (lab1), print ast and return
+        ASTPrinter printer;
+        ast.run_visitor(printer);
+    } else {
+        std::unique_ptr<Module> m;
+        CminusfBuilder builder;
+        ast.run_visitor(builder);
+        m = builder.getModule();
+
+        std::ofstream output_stream(config.output_file);
+        if (config.emitllvm) {
+            auto abs_path = std::filesystem::canonical(config.input_file);
+            output_stream << "; ModuleID = 'cminus'\n";
+            output_stream << "source_filename = " << abs_path << "\n\n";
+            output_stream << m->print();
+        }
+
+        // TODO: lab3 lab4 (IR optimization or codegen)
+    }
+
+    return 0;
+}
+
+void Config::parse_cmd_line() {
+    exe_name = argv[0];
+    for (int i = 1; i < argc; ++i) {
+        if (argv[i] == "-h"s || argv[i] == "--help"s) {
+            print_help();
+        } else if (argv[i] == "-o"s) {
+            if (output_file.empty() && i + 1 < argc) {
+                output_file = argv[i + 1];
+                i += 1;
+            } else {
+                print_err("bad output file");
+            }
+        } else if (argv[i] == "-emit-ast"s) {
+            emitast = true;
+        } else if (argv[i] == "-emit-llvm"s) {
+            emitllvm = true;
+        } else {
+            if (input_file.empty()) {
+                input_file = argv[i];
+            } else {
+                string err =
+                    "unrecognized command-line option \'"s + argv[i] + "\'"s;
+                print_err(err);
+            }
+        }
+    }
+}
+
+void Config::check() {
+    if (input_file.empty()) {
+        print_err("no input file");
+    }
+    if (input_file.extension() != ".cminus") {
+        print_err("file format not recognized");
+    }
+    if (output_file.empty()) {
+        output_file = input_file.stem();
+    }
+}
+
+void Config::print_help() const {
+    std::cout << "Usage: " << exe_name
+              << " [-h|--help] [-o <target-file>] [-mem2reg] [-emit-llvm] [-S] "
+                 "<input-file>"
+              << std::endl;
+    exit(0);
+}
+
+void Config::print_err(const string &msg) const {
+    std::cout << exe_name << ": " << msg << std::endl;
+    exit(-1);
+}
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
new file mode 100644
index 0000000..5fe66a7
--- /dev/null
+++ b/src/common/CMakeLists.txt
@@ -0,0 +1,8 @@
+add_library(common STATIC
+    syntax_tree.c
+    ast.cpp
+    logging.cpp
+)
+
+target_link_libraries(common)
+
diff --git a/src/common/ast.cpp b/src/common/ast.cpp
new file mode 100644
index 0000000..da76f87
--- /dev/null
+++ b/src/common/ast.cpp
@@ -0,0 +1,592 @@
+#include "ast.hpp"
+
+#include <cstring>
+#include <iostream>
+#include <stack>
+
+#define _AST_NODE_ERROR_                                                       \
+  std::cerr << "Abort due to node cast error."                                 \
+               "Contact with TAs to solve your problem."                       \
+            << std::endl;                                                      \
+  std::abort();
+// NOTE: use std::string instead of strcmp to compare strings,
+// 注意使用这里的接口
+#define _STR_EQ(a, b) (strcmp((a), (b)) == 0)
+
+void AST::run_visitor(ASTVisitor &visitor) { root->accept(visitor); }
+
+AST::AST(syntax_tree *s) {
+  if (s == nullptr) {
+    std::cerr << "empty input tree!" << std::endl;
+    std::abort();
+  }
+  auto node = transform_node_iter(s->root);
+  del_syntax_tree(s);
+  root = std::shared_ptr<ASTProgram>(static_cast<ASTProgram *>(node));
+}
+
+ASTNode *AST::transform_node_iter(syntax_tree_node *n) {
+  /*
+  example:
+  program -> declaration-list
+  declaration-list -> declaration-list declaration | declaration
+  将其转化成AST中ASTProgram的结构
+  */
+  if (_STR_EQ(n->name, "program")) {
+    auto node = new ASTProgram();
+    // flatten declaration list
+    std::stack<syntax_tree_node *>
+        s; // 为什么这里要用stack呢？如果用其他数据结构应该如何实现
+    auto list_ptr = n->children[0];
+    while (list_ptr->children_num == 2) {
+      s.push(list_ptr->children[1]);
+      list_ptr = list_ptr->children[0];
+    }
+    s.push(list_ptr->children[0]);
+
+    while (!s.empty()) {
+      auto child_node =
+          static_cast<ASTDeclaration *>(transform_node_iter(s.top()));
+
+      auto child_node_shared = std::shared_ptr<ASTDeclaration>(child_node);
+      node->declarations.push_back(child_node_shared);
+      s.pop();
+    }
+    return node;
+  } else if (_STR_EQ(n->name, "declaration")) {
+    return transform_node_iter(n->children[0]);
+  } else if (_STR_EQ(n->name, "var-declaration")) {
+    auto node = new ASTVarDeclaration();
+    // NOTE: 思考 ASTVarDeclaration的结构，需要填充的字段有哪些
+    // type
+    // 为什么不会有 TYPE_VOID?
+    if (_STR_EQ(n->children[0]->children[0]->name, "int"))
+      node->type = TYPE_INT;
+    else
+      node->type = TYPE_FLOAT;
+    // id & num
+    // 由不同的表达式填充
+    if (n->children_num == 3) {
+      node->id = n->children[1]->name;
+    } else if (n->children_num == 6) {
+      node->id = n->children[1]->name;
+      int num = std::stoi(n->children[3]->name);
+      auto num_node = std::make_shared<ASTNum>();
+      num_node->i_val = num;
+      num_node->type = TYPE_INT;
+      node->num = num_node;
+    } else {
+      std::cerr << "[ast]: var-declaration transform failure!" << std::endl;
+      std::abort();
+    }
+    return node;
+  } else if (_STR_EQ(n->name, "fun-declaration")) {
+    // fun-declaration -> type-specifier ID ( params ) compound-stmt
+    // 由表达式和 ASTFunDeclaration的结构，我们需要填充
+    // type, id, params, compound_stmt 这四个字段
+    auto node = new ASTFunDeclaration();
+    // type 字段填充
+    if (_STR_EQ(n->children[0]->children[0]->name, "int")) {
+      node->type = TYPE_INT;
+    } else if (_STR_EQ(n->children[0]->children[0]->name, "float")) {
+      node->type = TYPE_FLOAT;
+    } else {
+      node->type = TYPE_VOID;
+    }
+    // id 字段填充
+    node->id = n->children[1]->name;
+
+    /*
+        params 字段填充
+        注意这里的params是一个列表，每个元素都是一个ASTParam，需要flatten
+        params -> param-list | void
+        param-list -> param-list , param | param
+    */
+    // TODO: 1.fill in the fields of ASTFunDeclaration
+    // 1.1 flatten params
+
+    // 1.2 compound_stmt 字段填充
+
+    return node;
+  } else if (_STR_EQ(n->name, "param")) {
+    // param -> type-specifier ID | type-specifier ID [ ]
+    // ASTParam的结构 主要需要填充的属性有 type, id, isarray
+    auto node = new ASTParam();
+    // type, id, isarray
+    if (_STR_EQ(n->children[0]->children[0]->name, "int"))
+      node->type = TYPE_INT;
+    else
+      node->type = TYPE_FLOAT;
+    node->id = n->children[1]->name;
+    if (n->children_num > 2)
+      node->isarray = true;
+    return node;
+  } else if (_STR_EQ(n->name, "compound-stmt")) {
+    auto node = new ASTCompoundStmt();
+    // TODO: 2.fill in the fields of ASTCompoundStmt
+    /*
+      文法表达式如下
+      compound-stmt -> { local-declarations statement-list }
+      local-declarations -> local-declarations var-declaration | empty
+      statement-list -> statement-list statement | empty
+    */
+    // local declarations
+    // 2.1 flatten local declarations
+
+    // statement list
+    // 2.2 flatten statement-list
+
+    return node;
+  } else if (_STR_EQ(n->name, "statement")) {
+    return transform_node_iter(n->children[0]);
+  } else if (_STR_EQ(n->name, "expression-stmt")) {
+    auto node = new ASTExpressionStmt();
+    if (n->children_num == 2) {
+      auto expr_node =
+          static_cast<ASTExpression *>(transform_node_iter(n->children[0]));
+
+      auto expr_node_ptr = std::shared_ptr<ASTExpression>(expr_node);
+      node->expression = expr_node_ptr;
+    }
+    return node;
+  } else if (_STR_EQ(n->name, "selection-stmt")) {
+    auto node = new ASTSelectionStmt();
+    // TODO: 5.fill in the fields of ASTSelectionStmt
+    /*
+      selection-stmt -> if ( expression ) statement | if ( expression )
+      statement else statement ASTSelectionStmt的结构，需要填充的字段有
+      expression, if_statement, else_statement
+    */
+    // 5.1 expresstion
+
+    // 5.2 if statement
+
+    // check whether this selection statement contains
+    // 5.3 else structure
+
+    return node;
+  } else if (_STR_EQ(n->name, "iteration-stmt")) {
+    auto node = new ASTIterationStmt();
+
+    auto expr_node =
+        static_cast<ASTExpression *>(transform_node_iter(n->children[2]));
+    auto expr_node_ptr = std::shared_ptr<ASTExpression>(expr_node);
+    node->expression = expr_node_ptr;
+
+    auto stmt_node =
+        static_cast<ASTStatement *>(transform_node_iter(n->children[4]));
+    auto stmt_node_ptr = std::shared_ptr<ASTStatement>(stmt_node);
+    node->statement = stmt_node_ptr;
+
+    return node;
+  } else if (_STR_EQ(n->name, "return-stmt")) {
+    auto node = new ASTReturnStmt();
+    if (n->children_num == 3) {
+      auto expr_node =
+          static_cast<ASTExpression *>(transform_node_iter(n->children[1]));
+      node->expression = std::shared_ptr<ASTExpression>(expr_node);
+    }
+    return node;
+  } else if (_STR_EQ(n->name, "expression")) {
+    // simple-expression
+    if (n->children_num == 1) {
+      return transform_node_iter(n->children[0]);
+    }
+    auto node = new ASTAssignExpression();
+
+    auto var_node = static_cast<ASTVar *>(transform_node_iter(n->children[0]));
+    node->var = std::shared_ptr<ASTVar>(var_node);
+
+    auto expr_node =
+        static_cast<ASTExpression *>(transform_node_iter(n->children[2]));
+    node->expression = std::shared_ptr<ASTExpression>(expr_node);
+
+    return node;
+  } else if (_STR_EQ(n->name, "var")) {
+    auto node = new ASTVar();
+    node->id = n->children[0]->name;
+    if (n->children_num == 4) {
+      auto expr_node =
+          static_cast<ASTExpression *>(transform_node_iter(n->children[2]));
+      node->expression = std::shared_ptr<ASTExpression>(expr_node);
+    }
+    return node;
+  } else if (_STR_EQ(n->name, "simple-expression")) {
+    auto node = new ASTSimpleExpression();
+    auto expr_node_1 = static_cast<ASTAdditiveExpression *>(
+        transform_node_iter(n->children[0]));
+    node->additive_expression_l =
+        std::shared_ptr<ASTAdditiveExpression>(expr_node_1);
+
+    if (n->children_num == 3) {
+      auto op_name = n->children[1]->children[0]->name;
+      if (_STR_EQ(op_name, "<="))
+        node->op = OP_LE;
+      else if (_STR_EQ(op_name, "<"))
+        node->op = OP_LT;
+      else if (_STR_EQ(op_name, ">"))
+        node->op = OP_GT;
+      else if (_STR_EQ(op_name, ">="))
+        node->op = OP_GE;
+      else if (_STR_EQ(op_name, "=="))
+        node->op = OP_EQ;
+      else if (_STR_EQ(op_name, "!="))
+        node->op = OP_NEQ;
+
+      auto expr_node_2 = static_cast<ASTAdditiveExpression *>(
+          transform_node_iter(n->children[2]));
+      node->additive_expression_r =
+          std::shared_ptr<ASTAdditiveExpression>(expr_node_2);
+    }
+    return node;
+  } else if (_STR_EQ(n->name, "additive-expression")) {
+    auto node = new ASTAdditiveExpression();
+    if (n->children_num == 3) {
+      // TODO: 4.fill in the fields of ASTAdditiveExpression
+      /*
+        文法表达式如下
+        additive-expression -> additive-expression addop term | term 
+      */
+      // additive_expression, term, op
+
+    } else {
+      auto term_node =
+          static_cast<ASTTerm *>(transform_node_iter(n->children[0]));
+      node->term = std::shared_ptr<ASTTerm>(term_node);
+    }
+    return node;
+  } else if (_STR_EQ(n->name, "term")) {
+    auto node = new ASTTerm();
+    if (n->children_num == 3) {
+      auto term_node =
+          static_cast<ASTTerm *>(transform_node_iter(n->children[0]));
+      node->term = std::shared_ptr<ASTTerm>(term_node);
+
+      auto op_name = n->children[1]->children[0]->name;
+      if (_STR_EQ(op_name, "*"))
+        node->op = OP_MUL;
+      else if (_STR_EQ(op_name, "/"))
+        node->op = OP_DIV;
+
+      auto factor_node =
+          static_cast<ASTFactor *>(transform_node_iter(n->children[2]));
+      node->factor = std::shared_ptr<ASTFactor>(factor_node);
+    } else {
+      auto factor_node =
+          static_cast<ASTFactor *>(transform_node_iter(n->children[0]));
+      node->factor = std::shared_ptr<ASTFactor>(factor_node);
+    }
+    return node;
+  } else if (_STR_EQ(n->name, "factor")) {
+    int i = 0;
+    if (n->children_num == 3)
+      i = 1;
+    auto name = n->children[i]->name;
+    if (_STR_EQ(name, "expression") || _STR_EQ(name, "var") ||
+        _STR_EQ(name, "call"))
+      return transform_node_iter(n->children[i]);
+    else {
+      auto num_node = new ASTNum();
+      // TODO: 3.fill in the fields of ASTNum
+      /*
+        文法表达式如下
+        factor -> ( expression ) | var | call | integer | float
+        float -> FLOATPOINT
+        integer -> INTEGER
+      */
+      if (_STR_EQ(name, "integer")) {
+        // 3.1
+
+      } else if (_STR_EQ(name, "float")) {
+        // 3.2
+
+      } else {
+        _AST_NODE_ERROR_
+      }
+      return num_node;
+    }
+  } else if (_STR_EQ(n->name, "call")) {
+    auto node = new ASTCall();
+    node->id = n->children[0]->name;
+    // flatten args
+    if (_STR_EQ(n->children[2]->children[0]->name, "arg-list")) {
+      auto list_ptr = n->children[2]->children[0];
+      auto s = std::stack<syntax_tree_node *>();
+      while (list_ptr->children_num == 3) {
+        s.push(list_ptr->children[2]);
+        list_ptr = list_ptr->children[0];
+      }
+      s.push(list_ptr->children[0]);
+
+      while (!s.empty()) {
+        auto expr_node =
+            static_cast<ASTExpression *>(transform_node_iter(s.top()));
+        auto expr_node_ptr = std::shared_ptr<ASTExpression>(expr_node);
+        node->args.push_back(expr_node_ptr);
+        s.pop();
+      }
+    }
+    return node;
+  } else {
+    std::cerr << "[ast]: transform failure!" << std::endl;
+    std::abort();
+  }
+}
+
+Value* ASTProgram::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTNum::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTVarDeclaration::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTFunDeclaration::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTParam::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTCompoundStmt::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTExpressionStmt::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTSelectionStmt::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTIterationStmt::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTReturnStmt::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTAssignExpression::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTSimpleExpression::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTAdditiveExpression::accept(ASTVisitor &visitor) {
+    return visitor.visit(*this);
+}
+Value* ASTVar::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTTerm::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+Value* ASTCall::accept(ASTVisitor &visitor) { return visitor.visit(*this); }
+
+#define _DEBUG_PRINT_N_(N)                                                     \
+    { std::cout << std::string(N, '-'); }
+
+Value* ASTPrinter::visit(ASTProgram &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "program" << std::endl;
+    add_depth();
+    for (auto decl : node.declarations) {
+        decl->accept(*this);
+    }
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTNum &node) {
+    _DEBUG_PRINT_N_(depth);
+    if (node.type == TYPE_INT) {
+        std::cout << "num (int): " << node.i_val << std::endl;
+    } else if (node.type == TYPE_FLOAT) {
+        std::cout << "num (float): " << node.f_val << std::endl;
+    } else {
+        _AST_NODE_ERROR_
+    }
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTVarDeclaration &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "var-declaration: " << node.id;
+    if (node.num != nullptr) {
+        std::cout << "[]" << std::endl;
+        add_depth();
+        node.num->accept(*this);
+        remove_depth();
+        return nullptr;
+    }
+    std::cout << std::endl;
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTFunDeclaration &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "fun-declaration: " << node.id << std::endl;
+    add_depth();
+    for (auto param : node.params) {
+        param->accept(*this);
+    }
+
+    node.compound_stmt->accept(*this);
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTParam &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "param: " << node.id;
+    if (node.isarray)
+        std::cout << "[]";
+    std::cout << std::endl;
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTCompoundStmt &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "compound-stmt" << std::endl;
+    add_depth();
+    for (auto decl : node.local_declarations) {
+        decl->accept(*this);
+    }
+
+    for (auto stmt : node.statement_list) {
+        stmt->accept(*this);
+    }
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTExpressionStmt &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "expression-stmt" << std::endl;
+    add_depth();
+    if (node.expression != nullptr)
+        node.expression->accept(*this);
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTSelectionStmt &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "selection-stmt" << std::endl;
+    add_depth();
+    node.expression->accept(*this);
+    node.if_statement->accept(*this);
+    if (node.else_statement != nullptr)
+        node.else_statement->accept(*this);
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTIterationStmt &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "iteration-stmt" << std::endl;
+    add_depth();
+    node.expression->accept(*this);
+    node.statement->accept(*this);
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTReturnStmt &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "return-stmt";
+    if (node.expression == nullptr) {
+        std::cout << ": void" << std::endl;
+    } else {
+        std::cout << std::endl;
+        add_depth();
+        node.expression->accept(*this);
+        remove_depth();
+    }
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTAssignExpression &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "assign-expression" << std::endl;
+    add_depth();
+    node.var->accept(*this);
+    node.expression->accept(*this);
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTSimpleExpression &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "simple-expression";
+    if (node.additive_expression_r == nullptr) {
+        std::cout << std::endl;
+    } else {
+        std::cout << ": ";
+        if (node.op == OP_LT) {
+            std::cout << "<";
+        } else if (node.op == OP_LE) {
+            std::cout << "<=";
+        } else if (node.op == OP_GE) {
+            std::cout << ">=";
+        } else if (node.op == OP_GT) {
+            std::cout << ">";
+        } else if (node.op == OP_EQ) {
+            std::cout << "==";
+        } else if (node.op == OP_NEQ) {
+            std::cout << "!=";
+        } else {
+            std::abort();
+        }
+        std::cout << std::endl;
+    }
+    add_depth();
+    node.additive_expression_l->accept(*this);
+    if (node.additive_expression_r != nullptr)
+        node.additive_expression_r->accept(*this);
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTAdditiveExpression &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "additive-expression";
+    if (node.additive_expression == nullptr) {
+        std::cout << std::endl;
+    } else {
+        std::cout << ": ";
+        if (node.op == OP_PLUS) {
+            std::cout << "+";
+        } else if (node.op == OP_MINUS) {
+            std::cout << "-";
+        } else {
+            std::abort();
+        }
+        std::cout << std::endl;
+    }
+    add_depth();
+    if (node.additive_expression != nullptr)
+        node.additive_expression->accept(*this);
+    node.term->accept(*this);
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTVar &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "var: " << node.id;
+    if (node.expression != nullptr) {
+        std::cout << "[]" << std::endl;
+        add_depth();
+        node.expression->accept(*this);
+        remove_depth();
+        return nullptr;
+    }
+    std::cout << std::endl;
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTTerm &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "term";
+    if (node.term == nullptr) {
+        std::cout << std::endl;
+    } else {
+        std::cout << ": ";
+        if (node.op == OP_MUL) {
+            std::cout << "*";
+        } else if (node.op == OP_DIV) {
+            std::cout << "/";
+        } else {
+            std::abort();
+        }
+        std::cout << std::endl;
+    }
+    add_depth();
+    if (node.term != nullptr)
+        node.term->accept(*this);
+
+    node.factor->accept(*this);
+    remove_depth();
+    return nullptr;
+}
+
+Value* ASTPrinter::visit(ASTCall &node) {
+    _DEBUG_PRINT_N_(depth);
+    std::cout << "call: " << node.id << "()" << std::endl;
+    add_depth();
+    for (auto arg : node.args) {
+        arg->accept(*this);
+    }
+    remove_depth();
+    return nullptr;
+}
diff --git a/src/common/logging.cpp b/src/common/logging.cpp
new file mode 100644
index 0000000..e733833
--- /dev/null
+++ b/src/common/logging.cpp
@@ -0,0 +1,38 @@
+#include "logging.hpp"
+
+void LogWriter::operator<(const LogStream &stream) {
+    std::ostringstream msg;
+    msg << stream.sstream_.rdbuf();
+    output_log(msg);
+}
+
+void LogWriter::output_log(const std::ostringstream &msg) {
+    if (log_level_ >= env_log_level)
+        std::cout << "[" << level2string(log_level_) << "] "
+                  << "(" << location_.file_ << ":" << location_.line_ << "L  "
+                  << location_.func_ << ")" << msg.str() << std::endl;
+}
+std::string level2string(LogLevel level) {
+    switch (level) {
+    case DEBUG:
+        return "DEBUG";
+
+    case INFO:
+        return "INFO";
+
+    case WARNING:
+        return "WARNING";
+
+    case ERROR:
+        return "ERROR";
+
+    default:
+        return "";
+    }
+}
+std::string get_short_name(const char *file_path) {
+    std::string short_file_path = file_path;
+    int index = short_file_path.find_last_of('/');
+
+    return short_file_path.substr(index + 1);
+}
diff --git a/src/common/syntax_tree.c b/src/common/syntax_tree.c
new file mode 100644
index 0000000..1e9b35e
--- /dev/null
+++ b/src/common/syntax_tree.c
@@ -0,0 +1,75 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "syntax_tree.h"
+
+syntax_tree_node *new_syntax_tree_node(const char *name) {
+    syntax_tree_node *new_node =
+        (syntax_tree_node *)malloc(sizeof(syntax_tree_node));
+    if (name)
+        strncpy(new_node->name, name, SYNTAX_TREE_NODE_NAME_MAX);
+    else
+        new_node->name[0] = '\0';
+    new_node->children_num = 0;
+    return new_node;
+}
+
+int syntax_tree_add_child(syntax_tree_node *parent, syntax_tree_node *child) {
+    if (!parent || !child)
+        return -1;
+    parent->children[parent->children_num++] = child;
+    return parent->children_num;
+}
+
+void del_syntax_tree_node(syntax_tree_node *node, int recursive) {
+    if (!node)
+        return;
+
+    int i;
+    if (recursive) {
+        for (i = 0; i < node->children_num; i++) {
+            del_syntax_tree_node(node->children[i], 1);
+        }
+    }
+    free(node);
+}
+
+syntax_tree *new_syntax_tree() {
+    return (syntax_tree *)malloc(sizeof(syntax_tree));
+}
+
+void del_syntax_tree(syntax_tree *tree) {
+    if (!tree)
+        return;
+
+    if (tree->root) {
+        del_syntax_tree_node(tree->root, 1);
+    }
+    free(tree);
+}
+
+void print_syntax_tree_node(FILE *fout, syntax_tree_node *node, int level) {
+    // assume fout valid now
+
+    // check if "node" empty pointer
+    if (!node)
+        return;
+
+    // print myself
+    int i;
+    for (i = 0; i < level; i++) {
+        fprintf(fout, "|  ");
+    }
+    fprintf(fout, ">--%s %s\n", (node->children_num ? "+" : "*"), node->name);
+
+    for (i = 0; i < node->children_num; i++) {
+        print_syntax_tree_node(fout, node->children[i], level + 1);
+    }
+}
+
+void print_syntax_tree(FILE *fout, syntax_tree *tree) {
+    if (!fout)
+        return;
+
+    print_syntax_tree_node(fout, tree->root, 0);
+}
diff --git a/src/io/CMakeLists.txt b/src/io/CMakeLists.txt
new file mode 100644
index 0000000..3517289
--- /dev/null
+++ b/src/io/CMakeLists.txt
@@ -0,0 +1,6 @@
+add_library(cminus_io io.c)
+
+install(
+    TARGETS cminus_io
+    ARCHIVE DESTINATION lib
+)
diff --git a/src/io/io.c b/src/io/io.c
new file mode 100644
index 0000000..11b25c0
--- /dev/null
+++ b/src/io/io.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+int input() {
+    int a;
+    scanf("%d", &a);
+    return a;
+}
+
+void output(int a) { printf("%d\n", a); }
+
+void outputFloat(float a) { printf("%f\n", a); }
+
+void neg_idx_except() {
+    printf("negative index exception\n");
+    exit(0);
+}
diff --git a/src/io/io.h b/src/io/io.h
new file mode 100644
index 0000000..0b04739
--- /dev/null
+++ b/src/io/io.h
@@ -0,0 +1,7 @@
+int input();
+
+void output(int a);
+
+void outputFloat(float a);
+
+void neg_idx_except();
diff --git a/src/lightir/BasicBlock.cpp b/src/lightir/BasicBlock.cpp
new file mode 100644
index 0000000..5f7daeb
--- /dev/null
+++ b/src/lightir/BasicBlock.cpp
@@ -0,0 +1,71 @@
+#include "BasicBlock.hpp"
+
+#include "Function.hpp"
+#include "IRprinter.hpp"
+#include "Module.hpp"
+
+#include <cassert>
+
+BasicBlock::BasicBlock(Module *m, const std::string &name = "",
+                       Function *parent = nullptr)
+    : Value(m->get_label_type(), name), parent_(parent) {
+    assert(parent && "currently parent should not be nullptr");
+    parent_->add_basic_block(this);
+}
+
+Module *BasicBlock::get_module() { return get_parent()->get_parent(); }
+void BasicBlock::erase_from_parent() { this->get_parent()->remove(this); }
+
+bool BasicBlock::is_terminated() const {
+    if (instr_list_.empty()) {
+        return false;
+    }
+    switch (instr_list_.back().get_instr_type()) {
+    case Instruction::ret:
+    case Instruction::br:
+        return true;
+    default:
+        return false;
+    }
+}
+
+Instruction *BasicBlock::get_terminator() {
+    assert(is_terminated() &&
+           "Trying to get terminator from an bb which is not terminated");
+    return &instr_list_.back();
+}
+
+void BasicBlock::add_instruction(Instruction *instr) {
+    assert(not is_terminated() && "Inserting instruction to terminated bb");
+    instr_list_.push_back(instr);
+}
+
+std::string BasicBlock::print() {
+    std::string bb_ir;
+    bb_ir += this->get_name();
+    bb_ir += ":";
+    // print prebb
+    if (!this->get_pre_basic_blocks().empty()) {
+        bb_ir += "                                                ; preds = ";
+    }
+    for (auto bb : this->get_pre_basic_blocks()) {
+        if (bb != *this->get_pre_basic_blocks().begin()) {
+            bb_ir += ", ";
+        }
+        bb_ir += print_as_op(bb, false);
+    }
+
+    // print prebb
+    if (!this->get_parent()) {
+        bb_ir += "\n";
+        bb_ir += "; Error: Block without parent!";
+    }
+    bb_ir += "\n";
+    for (auto &instr : this->get_instructions()) {
+        bb_ir += "  ";
+        bb_ir += instr.print();
+        bb_ir += "\n";
+    }
+
+    return bb_ir;
+}
diff --git a/src/lightir/CMakeLists.txt b/src/lightir/CMakeLists.txt
new file mode 100644
index 0000000..c519e49
--- /dev/null
+++ b/src/lightir/CMakeLists.txt
@@ -0,0 +1,18 @@
+add_library(
+    IR_lib STATIC
+    Type.cpp
+    User.cpp
+    Value.cpp
+    BasicBlock.cpp
+    Constant.cpp
+    Function.cpp
+    GlobalVariable.cpp
+    Instruction.cpp
+    Module.cpp
+    IRprinter.cpp
+)
+
+target_link_libraries(
+    IR_lib
+    LLVMSupport
+)
diff --git a/src/lightir/Constant.cpp b/src/lightir/Constant.cpp
new file mode 100644
index 0000000..3dcdbd4
--- /dev/null
+++ b/src/lightir/Constant.cpp
@@ -0,0 +1,116 @@
+#include "Constant.hpp"
+#include "Module.hpp"
+
+#include <iostream>
+#include <memory>
+#include <sstream>
+#include <unordered_map>
+
+struct pair_hash {
+    template <typename T>
+    std::size_t operator()(const std::pair<T, Module *> val) const {
+        auto lhs = std::hash<T>()(val.first);
+        auto rhs =
+            std::hash<uintptr_t>()(reinterpret_cast<uintptr_t>(val.second));
+        return lhs ^ rhs;
+    }
+};
+
+static std::unordered_map<std::pair<int, Module *>,
+                          std::unique_ptr<ConstantInt>, pair_hash>
+    cached_int;
+static std::unordered_map<std::pair<bool, Module *>,
+                          std::unique_ptr<ConstantInt>, pair_hash>
+    cached_bool;
+static std::unordered_map<std::pair<float, Module *>,
+                          std::unique_ptr<ConstantFP>, pair_hash>
+    cached_float;
+static std::unordered_map<Type *, std::unique_ptr<ConstantZero>> cached_zero;
+
+ConstantInt *ConstantInt::get(int val, Module *m) {
+    if (cached_int.find(std::make_pair(val, m)) != cached_int.end())
+        return cached_int[std::make_pair(val, m)].get();
+    return (cached_int[std::make_pair(val, m)] = std::unique_ptr<ConstantInt>(
+                new ConstantInt(m->get_int32_type(), val)))
+        .get();
+}
+ConstantInt *ConstantInt::get(bool val, Module *m) {
+    if (cached_bool.find(std::make_pair(val, m)) != cached_bool.end())
+        return cached_bool[std::make_pair(val, m)].get();
+    return (cached_bool[std::make_pair(val, m)] = std::unique_ptr<ConstantInt>(
+                new ConstantInt(m->get_int1_type(), val ? 1 : 0)))
+        .get();
+}
+std::string ConstantInt::print() {
+    std::string const_ir;
+    Type *ty = this->get_type();
+    if (ty->is_integer_type() &&
+        static_cast<IntegerType *>(ty)->get_num_bits() == 1) {
+        // int1
+        const_ir += (this->get_value() == 0) ? "false" : "true";
+    } else {
+        // int32
+        const_ir += std::to_string(this->get_value());
+    }
+    return const_ir;
+}
+
+ConstantArray::ConstantArray(ArrayType *ty, const std::vector<Constant *> &val)
+    : Constant(ty, "") {
+    for (unsigned i = 0; i < val.size(); i++)
+        set_operand(i, val[i]);
+    this->const_array.assign(val.begin(), val.end());
+}
+
+Constant *ConstantArray::get_element_value(int index) {
+    return this->const_array[index];
+}
+
+ConstantArray *ConstantArray::get(ArrayType *ty,
+                                  const std::vector<Constant *> &val) {
+    return new ConstantArray(ty, val);
+}
+
+std::string ConstantArray::print() {
+    std::string const_ir;
+    const_ir += this->get_type()->print();
+    const_ir += " ";
+    const_ir += "[";
+    for (unsigned i = 0; i < this->get_size_of_array(); i++) {
+        Constant *element = get_element_value(i);
+        if (!dynamic_cast<ConstantArray *>(get_element_value(i))) {
+            const_ir += element->get_type()->print();
+        }
+        const_ir += element->print();
+        if (i < this->get_size_of_array()) {
+            const_ir += ", ";
+        }
+    }
+    const_ir += "]";
+    return const_ir;
+}
+
+ConstantFP *ConstantFP::get(float val, Module *m) {
+    if (cached_float.find(std::make_pair(val, m)) != cached_float.end())
+        return cached_float[std::make_pair(val, m)].get();
+    return (cached_float[std::make_pair(val, m)] = std::unique_ptr<ConstantFP>(
+                new ConstantFP(m->get_float_type(), val)))
+        .get();
+}
+
+std::string ConstantFP::print() {
+    std::stringstream fp_ir_ss;
+    std::string fp_ir;
+    double val = this->get_value();
+    fp_ir_ss << "0x" << std::hex << *(uint64_t *)&val << std::endl;
+    fp_ir_ss >> fp_ir;
+    return fp_ir;
+}
+
+ConstantZero *ConstantZero::get(Type *ty, Module *m) {
+    if (not cached_zero[ty])
+        cached_zero[ty] = std::unique_ptr<ConstantZero>(new ConstantZero(ty));
+    return cached_zero[ty].get();
+}
+
+std::string ConstantZero::print() { return "zeroinitializer"; }
diff --git a/src/lightir/Function.cpp b/src/lightir/Function.cpp
new file mode 100644
index 0000000..e48e575
--- /dev/null
+++ b/src/lightir/Function.cpp
@@ -0,0 +1,131 @@
+#include "Function.hpp"
+#include "IRprinter.hpp"
+#include "Module.hpp"
+
+Function::Function(FunctionType *ty, const std::string &name, Module *parent)
+    : Value(ty, name), parent_(parent), seq_cnt_(0) {
+    // num_args_ = ty->getNumParams();
+    parent->add_function(this);
+    // build args
+    for (unsigned i = 0; i < get_num_of_args(); i++) {
+        arguments_.emplace_back(ty->get_param_type(i), "", this, i);
+    }
+}
+Function *Function::create(FunctionType *ty, const std::string &name,
+                           Module *parent) {
+    return new Function(ty, name, parent);
+}
+
+FunctionType *Function::get_function_type() const {
+    return static_cast<FunctionType *>(get_type());
+}
+
+Type *Function::get_return_type() const {
+    return get_function_type()->get_return_type();
+}
+
+unsigned Function::get_num_of_args() const {
+    return get_function_type()->get_num_of_args();
+}
+
+unsigned Function::get_num_basic_blocks() const { return basic_blocks_.size(); }
+
+Module *Function::get_parent() const { return parent_; }
+
+void Function::remove(BasicBlock *bb) {
+    basic_blocks_.remove(bb);
+    for (auto pre : bb->get_pre_basic_blocks()) {
+        pre->remove_succ_basic_block(bb);
+    }
+    for (auto succ : bb->get_succ_basic_blocks()) {
+        succ->remove_pre_basic_block(bb);
+    }
+}
+
+void Function::add_basic_block(BasicBlock *bb) { basic_blocks_.push_back(bb); }
+
+void Function::set_instr_name() {
+    std::map<Value *, int> seq;
+    for (auto &arg : this->get_args()) {
+        if (seq.find(&arg) == seq.end()) {
+            auto seq_num = seq.size() + seq_cnt_;
+            if (arg.set_name("arg" + std::to_string(seq_num))) {
+                seq.insert({&arg, seq_num});
+            }
+        }
+    }
+    for (auto &bb1 : basic_blocks_) {
+        auto bb = &bb1;
+        if (seq.find(bb) == seq.end()) {
+            auto seq_num = seq.size() + seq_cnt_;
+            if (bb->set_name("label" + std::to_string(seq_num))) {
+                seq.insert({bb, seq_num});
+            }
+        }
+        for (auto &instr : bb->get_instructions()) {
+            if (!instr.is_void() && seq.find(&instr) == seq.end()) {
+                auto seq_num = seq.size() + seq_cnt_;
+                if (instr.set_name("op" + std::to_string(seq_num))) {
+                    seq.insert({&instr, seq_num});
+                }
+            }
+        }
+    }
+    seq_cnt_ += seq.size();
+}
+
+std::string Function::print() {
+    set_instr_name();
+    std::string func_ir;
+    if (this->is_declaration()) {
+        func_ir += "declare ";
+    } else {
+        func_ir += "define ";
+    }
+
+    func_ir += this->get_return_type()->print();
+    func_ir += " ";
+    func_ir += print_as_op(this, false);
+    func_ir += "(";
+
+    // print arg
+    if (this->is_declaration()) {
+        for (unsigned i = 0; i < this->get_num_of_args(); i++) {
+            if (i)
+                func_ir += ", ";
+            func_ir += static_cast<FunctionType *>(this->get_type())
+                           ->get_param_type(i)
+                           ->print();
+        }
+    } else {
+        for (auto &arg : get_args()) {
+            if (&arg != &*get_args().begin())
+                func_ir += ", ";
+            func_ir += arg.print();
+        }
+    }
+    func_ir += ")";
+
+    // print bb
+    if (this->is_declaration()) {
+        func_ir += "\n";
+    } else {
+        func_ir += " {";
+        func_ir += "\n";
+        for (auto &bb1 : this->get_basic_blocks()) {
+            auto bb = &bb1;
+            func_ir += bb->print();
+        }
+        func_ir += "}";
+    }
+
+    return func_ir;
+}
+
+std::string Argument::print() {
+    std::string arg_ir;
+    arg_ir += this->get_type()->print();
+    arg_ir += " %";
+    arg_ir += this->get_name();
+    return arg_ir;
+}
diff --git a/src/lightir/GlobalVariable.cpp b/src/lightir/GlobalVariable.cpp
new file mode 100644
index 0000000..906141b
--- /dev/null
+++ b/src/lightir/GlobalVariable.cpp
@@ -0,0 +1,28 @@
+#include "GlobalVariable.hpp"
+#include "IRprinter.hpp"
+
+GlobalVariable::GlobalVariable(std::string name, Module *m, Type *ty,
+                               bool is_const, Constant *init)
+    : User(ty, name), is_const_(is_const), init_val_(init) {
+    m->add_global_variable(this);
+    if (init) {
+        this->add_operand(init);
+    }
+} // global操作数为initval
+
+GlobalVariable *GlobalVariable::create(std::string name, Module *m, Type *ty,
+                                       bool is_const,
+                                       Constant *init = nullptr) {
+    return new GlobalVariable(name, m, PointerType::get(ty), is_const, init);
+}
+
+std::string GlobalVariable::print() {
+    std::string global_val_ir;
+    global_val_ir += print_as_op(this, false);
+    global_val_ir += " = ";
+    global_val_ir += (this->is_const() ? "constant " : "global ");
+    global_val_ir += this->get_type()->get_pointer_element_type()->print();
+    global_val_ir += " ";
+    global_val_ir += this->get_init()->print();
+    return global_val_ir;
+}
diff --git a/src/lightir/IRprinter.cpp b/src/lightir/IRprinter.cpp
new file mode 100644
index 0000000..7eb40d6
--- /dev/null
+++ b/src/lightir/IRprinter.cpp
@@ -0,0 +1,335 @@
+#include "IRprinter.hpp"
+#include "Instruction.hpp"
+#include <cassert>
+#include <type_traits>
+
+std::string print_as_op(Value *v, bool print_ty) {
+    std::string op_ir;
+    if (print_ty) {
+        op_ir += v->get_type()->print();
+        op_ir += " ";
+    }
+
+    if (dynamic_cast<GlobalVariable *>(v)) {
+        op_ir += "@" + v->get_name();
+    } else if (dynamic_cast<Function *>(v)) {
+        op_ir += "@" + v->get_name();
+    } else if (dynamic_cast<Constant *>(v)) {
+        op_ir += v->print();
+    } else {
+        op_ir += "%" + v->get_name();
+    }
+
+    return op_ir;
+}
+
+std::string print_instr_op_name(Instruction::OpID id) {
+    switch (id) {
+    case Instruction::ret:
+        return "ret";
+    case Instruction::br:
+        return "br";
+    case Instruction::add:
+        return "add";
+    case Instruction::sub:
+        return "sub";
+    case Instruction::mul:
+        return "mul";
+    case Instruction::sdiv:
+        return "sdiv";
+    case Instruction::fadd:
+        return "fadd";
+    case Instruction::fsub:
+        return "fsub";
+    case Instruction::fmul:
+        return "fmul";
+    case Instruction::fdiv:
+        return "fdiv";
+    case Instruction::alloca:
+        return "alloca";
+    case Instruction::load:
+        return "load";
+    case Instruction::store:
+        return "store";
+    case Instruction::ge:
+        return "sge";
+    case Instruction::gt:
+        return "sgt";
+    case Instruction::le:
+        return "sle";
+    case Instruction::lt:
+        return "slt";
+    case Instruction::eq:
+        return "eq";
+    case Instruction::ne:
+        return "ne";
+    case Instruction::fge:
+        return "uge";
+    case Instruction::fgt:
+        return "ugt";
+    case Instruction::fle:
+        return "ule";
+    case Instruction::flt:
+        return "ult";
+    case Instruction::feq:
+        return "ueq";
+    case Instruction::fne:
+        return "une";
+    case Instruction::phi:
+        return "phi";
+    case Instruction::call:
+        return "call";
+    case Instruction::getelementptr:
+        return "getelementptr";
+    case Instruction::zext:
+        return "zext";
+    case Instruction::fptosi:
+        return "fptosi";
+    case Instruction::sitofp:
+        return "sitofp";
+    }
+    assert(false && "Must be bug");
+}
+
+template <class BinInst> std::string print_binary_inst(const BinInst &inst) {
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += inst.get_name();
+    instr_ir += " = ";
+    instr_ir += inst.get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += inst.get_operand(0)->get_type()->print();
+    instr_ir += " ";
+    instr_ir += print_as_op(inst.get_operand(0), false);
+    instr_ir += ", ";
+    if (inst.get_operand(0)->get_type() == inst.get_operand(1)->get_type()) {
+        instr_ir += print_as_op(inst.get_operand(1), false);
+    } else {
+        instr_ir += print_as_op(inst.get_operand(1), true);
+    }
+    return instr_ir;
+}
+std::string IBinaryInst::print() { return print_binary_inst(*this); }
+std::string FBinaryInst::print() { return print_binary_inst(*this); }
+
+template <class CMP> std::string print_cmp_inst(const CMP &inst) {
+    std::string cmp_type;
+    if (inst.is_cmp())
+        cmp_type = "icmp";
+    else if (inst.is_fcmp())
+        cmp_type = "fcmp";
+    else
+        assert(false && "Unexpected case");
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += inst.get_name();
+    instr_ir += " = " + cmp_type + " ";
+    instr_ir += inst.get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += inst.get_operand(0)->get_type()->print();
+    instr_ir += " ";
+    instr_ir += print_as_op(inst.get_operand(0), false);
+    instr_ir += ", ";
+    if (inst.get_operand(0)->get_type() == inst.get_operand(1)->get_type()) {
+        instr_ir += print_as_op(inst.get_operand(1), false);
+    } else {
+        instr_ir += print_as_op(inst.get_operand(1), true);
+    }
+    return instr_ir;
+}
+std::string ICmpInst::print() { return print_cmp_inst(*this); }
+std::string FCmpInst::print() { return print_cmp_inst(*this); }
+
+std::string CallInst::print() {
+    std::string instr_ir;
+    if (!this->is_void()) {
+        instr_ir += "%";
+        instr_ir += this->get_name();
+        instr_ir += " = ";
+    }
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += this->get_function_type()->get_return_type()->print();
+
+    instr_ir += " ";
+    assert(dynamic_cast<Function *>(this->get_operand(0)) &&
+           "Wrong call operand function");
+    instr_ir += print_as_op(this->get_operand(0), false);
+    instr_ir += "(";
+    for (unsigned i = 1; i < this->get_num_operand(); i++) {
+        if (i > 1)
+            instr_ir += ", ";
+        instr_ir += this->get_operand(i)->get_type()->print();
+        instr_ir += " ";
+        instr_ir += print_as_op(this->get_operand(i), false);
+    }
+    instr_ir += ")";
+    return instr_ir;
+}
+
+std::string BranchInst::print() {
+    std::string instr_ir;
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += print_as_op(this->get_operand(0), true);
+    if (is_cond_br()) {
+        instr_ir += ", ";
+        instr_ir += print_as_op(this->get_operand(1), true);
+        instr_ir += ", ";
+        instr_ir += print_as_op(this->get_operand(2), true);
+    }
+    return instr_ir;
+}
+
+std::string ReturnInst::print() {
+    std::string instr_ir;
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    if (!is_void_ret()) {
+        instr_ir += this->get_operand(0)->get_type()->print();
+        instr_ir += " ";
+        instr_ir += print_as_op(this->get_operand(0), false);
+    } else {
+        instr_ir += "void";
+    }
+
+    return instr_ir;
+}
+
+std::string GetElementPtrInst::print() {
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += this->get_name();
+    instr_ir += " = ";
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    assert(this->get_operand(0)->get_type()->is_pointer_type());
+    instr_ir +=
+        this->get_operand(0)->get_type()->get_pointer_element_type()->print();
+    instr_ir += ", ";
+    for (unsigned i = 0; i < this->get_num_operand(); i++) {
+        if (i > 0)
+            instr_ir += ", ";
+        instr_ir += this->get_operand(i)->get_type()->print();
+        instr_ir += " ";
+        instr_ir += print_as_op(this->get_operand(i), false);
+    }
+    return instr_ir;
+}
+
+std::string StoreInst::print() {
+    std::string instr_ir;
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += this->get_operand(0)->get_type()->print();
+    instr_ir += " ";
+    instr_ir += print_as_op(this->get_operand(0), false);
+    instr_ir += ", ";
+    instr_ir += print_as_op(this->get_operand(1), true);
+    return instr_ir;
+}
+
+std::string LoadInst::print() {
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += this->get_name();
+    instr_ir += " = ";
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    assert(this->get_operand(0)->get_type()->is_pointer_type());
+    instr_ir +=
+        this->get_operand(0)->get_type()->get_pointer_element_type()->print();
+    instr_ir += ",";
+    instr_ir += " ";
+    instr_ir += print_as_op(this->get_operand(0), true);
+    return instr_ir;
+}
+
+std::string AllocaInst::print() {
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += this->get_name();
+    instr_ir += " = ";
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += get_alloca_type()->print();
+    return instr_ir;
+}
+
+std::string ZextInst::print() {
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += this->get_name();
+    instr_ir += " = ";
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += this->get_operand(0)->get_type()->print();
+    instr_ir += " ";
+    instr_ir += print_as_op(this->get_operand(0), false);
+    instr_ir += " to ";
+    instr_ir += this->get_dest_type()->print();
+    return instr_ir;
+}
+
+std::string FpToSiInst::print() {
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += this->get_name();
+    instr_ir += " = ";
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += this->get_operand(0)->get_type()->print();
+    instr_ir += " ";
+    instr_ir += print_as_op(this->get_operand(0), false);
+    instr_ir += " to ";
+    instr_ir += this->get_dest_type()->print();
+    return instr_ir;
+}
+
+std::string SiToFpInst::print() {
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += this->get_name();
+    instr_ir += " = ";
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += this->get_operand(0)->get_type()->print();
+    instr_ir += " ";
+    instr_ir += print_as_op(this->get_operand(0), false);
+    instr_ir += " to ";
+    instr_ir += this->get_dest_type()->print();
+    return instr_ir;
+}
+
+std::string PhiInst::print() {
+    std::string instr_ir;
+    instr_ir += "%";
+    instr_ir += this->get_name();
+    instr_ir += " = ";
+    instr_ir += get_instr_op_name();
+    instr_ir += " ";
+    instr_ir += this->get_operand(0)->get_type()->print();
+    instr_ir += " ";
+    for (unsigned i = 0; i < this->get_num_operand() / 2; i++) {
+        if (i > 0)
+            instr_ir += ", ";
+        instr_ir += "[ ";
+        instr_ir += print_as_op(this->get_operand(2 * i), false);
+        instr_ir += ", ";
+        instr_ir += print_as_op(this->get_operand(2 * i + 1), false);
+        instr_ir += " ]";
+    }
+    if (this->get_num_operand() / 2 <
+        this->get_parent()->get_pre_basic_blocks().size()) {
+        for (auto pre_bb : this->get_parent()->get_pre_basic_blocks()) {
+            if (std::find(this->get_operands().begin(),
+                          this->get_operands().end(),
+                          static_cast<Value *>(pre_bb)) ==
+                this->get_operands().end()) {
+                // find a pre_bb is not in phi
+                instr_ir += ", [ undef, " + print_as_op(pre_bb, false) + " ]";
+            }
+        }
+    }
+    return instr_ir;
+}
diff --git a/src/lightir/Instruction.cpp b/src/lightir/Instruction.cpp
new file mode 100644
index 0000000..383b21f
--- /dev/null
+++ b/src/lightir/Instruction.cpp
@@ -0,0 +1,364 @@
+#include "Instruction.hpp"
+#include "BasicBlock.hpp"
+#include "Function.hpp"
+#include "IRprinter.hpp"
+#include "Module.hpp"
+#include "Type.hpp"
+
+#include <algorithm>
+#include <cassert>
+#include <stdexcept>
+#include <string>
+#include <vector>
+
+Instruction::Instruction(Type *ty, OpID id, BasicBlock *parent)
+    : User(ty, ""), op_id_(id), parent_(parent) {
+    if (parent)
+        parent->add_instruction(this);
+}
+
+Function *Instruction::get_function() { return parent_->get_parent(); }
+Module *Instruction::get_module() { return parent_->get_module(); }
+
+std::string Instruction::get_instr_op_name() const {
+    return print_instr_op_name(op_id_);
+}
+
+IBinaryInst::IBinaryInst(OpID id, Value *v1, Value *v2, BasicBlock *bb)
+    : BaseInst<IBinaryInst>(bb->get_module()->get_int32_type(), id, bb) {
+    assert(v1->get_type()->is_int32_type() && v2->get_type()->is_int32_type() &&
+           "IBinaryInst operands are not both i32");
+    add_operand(v1);
+    add_operand(v2);
+}
+
+IBinaryInst *IBinaryInst::create_add(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(add, v1, v2, bb);
+}
+IBinaryInst *IBinaryInst::create_sub(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(sub, v1, v2, bb);
+}
+IBinaryInst *IBinaryInst::create_mul(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(mul, v1, v2, bb);
+}
+IBinaryInst *IBinaryInst::create_sdiv(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(sdiv, v1, v2, bb);
+}
+
+FBinaryInst::FBinaryInst(OpID id, Value *v1, Value *v2, BasicBlock *bb)
+    : BaseInst<FBinaryInst>(bb->get_module()->get_float_type(), id, bb) {
+    assert(v1->get_type()->is_float_type() && v2->get_type()->is_float_type() &&
+           "FBinaryInst operands are not both float");
+    add_operand(v1);
+    add_operand(v2);
+}
+
+FBinaryInst *FBinaryInst::create_fadd(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(fadd, v1, v2, bb);
+}
+FBinaryInst *FBinaryInst::create_fsub(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(fsub, v1, v2, bb);
+}
+FBinaryInst *FBinaryInst::create_fmul(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(fmul, v1, v2, bb);
+}
+FBinaryInst *FBinaryInst::create_fdiv(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(fdiv, v1, v2, bb);
+}
+
+ICmpInst::ICmpInst(OpID id, Value *lhs, Value *rhs, BasicBlock *bb)
+    : BaseInst<ICmpInst>(bb->get_module()->get_int1_type(), id, bb) {
+    assert(lhs->get_type()->is_int32_type() &&
+           rhs->get_type()->is_int32_type() &&
+           "CmpInst operands are not both i32");
+    add_operand(lhs);
+    add_operand(rhs);
+}
+
+ICmpInst *ICmpInst::create_ge(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(ge, v1, v2, bb);
+}
+ICmpInst *ICmpInst::create_gt(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(gt, v1, v2, bb);
+}
+ICmpInst *ICmpInst::create_le(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(le, v1, v2, bb);
+}
+ICmpInst *ICmpInst::create_lt(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(lt, v1, v2, bb);
+}
+ICmpInst *ICmpInst::create_eq(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(eq, v1, v2, bb);
+}
+ICmpInst *ICmpInst::create_ne(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(ne, v1, v2, bb);
+}
+
+FCmpInst::FCmpInst(OpID id, Value *lhs, Value *rhs, BasicBlock *bb)
+    : BaseInst<FCmpInst>(bb->get_module()->get_int1_type(), id, bb) {
+    assert(lhs->get_type()->is_float_type() &&
+           rhs->get_type()->is_float_type() &&
+           "FCmpInst operands are not both float");
+    add_operand(lhs);
+    add_operand(rhs);
+}
+
+FCmpInst *FCmpInst::create_fge(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(fge, v1, v2, bb);
+}
+FCmpInst *FCmpInst::create_fgt(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(fgt, v1, v2, bb);
+}
+FCmpInst *FCmpInst::create_fle(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(fle, v1, v2, bb);
+}
+FCmpInst *FCmpInst::create_flt(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(flt, v1, v2, bb);
+}
+FCmpInst *FCmpInst::create_feq(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(feq, v1, v2, bb);
+}
+FCmpInst *FCmpInst::create_fne(Value *v1, Value *v2, BasicBlock *bb) {
+    return create(fne, v1, v2, bb);
+}
+
+CallInst::CallInst(Function *func, std::vector<Value *> args, BasicBlock *bb)
+    : BaseInst<CallInst>(func->get_return_type(), call, bb) {
+    assert(func->get_type()->is_function_type() && "Not a function");
+    assert((func->get_num_of_args() == args.size()) && "Wrong number of args");
+    add_operand(func);
+    auto func_type = static_cast<FunctionType *>(func->get_type());
+    for (unsigned i = 0; i < args.size(); i++) {
+        assert(func_type->get_param_type(i) == args[i]->get_type() &&
+               "CallInst: Wrong arg type");
+        add_operand(args[i]);
+    }
+}
+
+CallInst *CallInst::create_call(Function *func, std::vector<Value *> args,
+                                BasicBlock *bb) {
+    return create(func, args, bb);
+}
+
+FunctionType *CallInst::get_function_type() const {
+    return static_cast<FunctionType *>(get_operand(0)->get_type());
+}
+
+BranchInst::BranchInst(Value *cond, BasicBlock *if_true, BasicBlock *if_false,
+                       BasicBlock *bb)
+    : BaseInst<BranchInst>(bb->get_module()->get_void_type(), br, bb) {
+    if (cond == nullptr) { // conditionless jump
+        assert(if_false == nullptr && "Given false-bb on conditionless jump");
+        add_operand(if_true);
+        // prev/succ
+        if_true->add_pre_basic_block(bb);
+        bb->add_succ_basic_block(if_true);
+    } else {
+        assert(cond->get_type()->is_int1_type() &&
+               "BranchInst condition is not i1");
+        add_operand(cond);
+        add_operand(if_true);
+        add_operand(if_false);
+        // prev/succ
+        if_true->add_pre_basic_block(bb);
+        if_false->add_pre_basic_block(bb);
+        bb->add_succ_basic_block(if_true);
+        bb->add_succ_basic_block(if_false);
+    }
+}
+
+BranchInst::~BranchInst() {
+    std::list<BasicBlock *> succs;
+    if (is_cond_br()) {
+        succs.push_back(static_cast<BasicBlock *>(get_operand(1)));
+        succs.push_back(static_cast<BasicBlock *>(get_operand(2)));
+    } else {
+        succs.push_back(static_cast<BasicBlock *>(get_operand(0)));
+    }
+    for (auto succ_bb : succs) {
+        if (succ_bb) {
+            succ_bb->remove_pre_basic_block(get_parent());
+            get_parent()->remove_succ_basic_block(succ_bb);
+        }
+    }
+}
+
+BranchInst *BranchInst::create_cond_br(Value *cond, BasicBlock *if_true,
+                                       BasicBlock *if_false, BasicBlock *bb) {
+    return create(cond, if_true, if_false, bb);
+}
+
+BranchInst *BranchInst::create_br(BasicBlock *if_true, BasicBlock *bb) {
+    return create(nullptr, if_true, nullptr, bb);
+}
+
+ReturnInst::ReturnInst(Value *val, BasicBlock *bb)
+    : BaseInst<ReturnInst>(bb->get_module()->get_void_type(), ret, bb) {
+    if (val == nullptr) {
+        assert(bb->get_parent()->get_return_type()->is_void_type());
+    } else {
+        assert(!bb->get_parent()->get_return_type()->is_void_type() &&
+               "Void function returning a value");
+        assert(bb->get_parent()->get_return_type() == val->get_type() &&
+               "ReturnInst type is different from function return type");
+        add_operand(val);
+    }
+}
+
+ReturnInst *ReturnInst::create_ret(Value *val, BasicBlock *bb) {
+    return create(val, bb);
+}
+ReturnInst *ReturnInst::create_void_ret(BasicBlock *bb) {
+    return create(nullptr, bb);
+}
+
+bool ReturnInst::is_void_ret() const { return get_num_operand() == 0; }
+
+GetElementPtrInst::GetElementPtrInst(Value *ptr, std::vector<Value *> idxs,
+                                     BasicBlock *bb)
+    : BaseInst<GetElementPtrInst>(PointerType::get(get_element_type(ptr, idxs)),
+                                  getelementptr, bb) {
+    add_operand(ptr);
+    for (unsigned i = 0; i < idxs.size(); i++) {
+        Value *idx = idxs[i];
+        assert(idx->get_type()->is_integer_type() && "Index is not integer");
+        add_operand(idx);
+    }
+}
+
+Type *GetElementPtrInst::get_element_type(Value *ptr,
+                                          std::vector<Value *> idxs) {
+    assert(ptr->get_type()->is_pointer_type() &&
+           "GetElementPtrInst ptr is not a pointer");
+
+    Type *ty = ptr->get_type()->get_pointer_element_type();
+    assert(
+        "GetElementPtrInst ptr is wrong type" &&
+        (ty->is_array_type() || ty->is_integer_type() || ty->is_float_type()));
+    if (ty->is_array_type()) {
+        ArrayType *arr_ty = static_cast<ArrayType *>(ty);
+        for (unsigned i = 1; i < idxs.size(); i++) {
+            ty = arr_ty->get_element_type();
+            if (i < idxs.size() - 1) {
+                assert(ty->is_array_type() && "Index error!");
+            }
+            if (ty->is_array_type()) {
+                arr_ty = static_cast<ArrayType *>(ty);
+            }
+        }
+    }
+    return ty;
+}
+
+Type *GetElementPtrInst::get_element_type() const {
+    return get_type()->get_pointer_element_type();
+}
+
+GetElementPtrInst *GetElementPtrInst::create_gep(Value *ptr,
+                                                 std::vector<Value *> idxs,
+                                                 BasicBlock *bb) {
+    return create(ptr, idxs, bb);
+}
+
+StoreInst::StoreInst(Value *val, Value *ptr, BasicBlock *bb)
+    : BaseInst<StoreInst>(bb->get_module()->get_void_type(), store, bb) {
+    assert((ptr->get_type()->get_pointer_element_type() == val->get_type()) &&
+           "StoreInst ptr is not a pointer to val type");
+    add_operand(val);
+    add_operand(ptr);
+}
+
+StoreInst *StoreInst::create_store(Value *val, Value *ptr, BasicBlock *bb) {
+    return create(val, ptr, bb);
+}
+
+LoadInst::LoadInst(Value *ptr, BasicBlock *bb)
+    : BaseInst<LoadInst>(ptr->get_type()->get_pointer_element_type(), load,
+                         bb) {
+    assert((get_type()->is_integer_type() or get_type()->is_float_type() or
+            get_type()->is_pointer_type()) &&
+           "Should not load value with type except int/float");
+    add_operand(ptr);
+}
+
+LoadInst *LoadInst::create_load(Value *ptr, BasicBlock *bb) {
+    return create(ptr, bb);
+}
+
+AllocaInst::AllocaInst(Type *ty, BasicBlock *bb)
+    : BaseInst<AllocaInst>(PointerType::get(ty), alloca, bb) {
+    static const std::array allowed_alloc_type = {
+        Type::IntegerTyID, Type::FloatTyID, Type::ArrayTyID, Type::PointerTyID};
+    assert(std::find(allowed_alloc_type.begin(), allowed_alloc_type.end(),
+                     ty->get_type_id()) != allowed_alloc_type.end() &&
+           "Not allowed type for alloca");
+}
+
+AllocaInst *AllocaInst::create_alloca(Type *ty, BasicBlock *bb) {
+    return create(ty, bb);
+}
+
+ZextInst::ZextInst(Value *val, Type *ty, BasicBlock *bb)
+    : BaseInst<ZextInst>(ty, zext, bb) {
+    assert(val->get_type()->is_integer_type() &&
+           "ZextInst operand is not integer");
+    assert(ty->is_integer_type() && "ZextInst destination type is not integer");
+    assert((static_cast<IntegerType *>(val->get_type())->get_num_bits() <
+            static_cast<IntegerType *>(ty)->get_num_bits()) &&
+           "ZextInst operand bit size is not smaller than destination type bit "
+           "size");
+    add_operand(val);
+}
+
+ZextInst *ZextInst::create_zext(Value *val, Type *ty, BasicBlock *bb) {
+    return create(val, ty, bb);
+}
+ZextInst *ZextInst::create_zext_to_i32(Value *val, BasicBlock *bb) {
+    return create(val, bb->get_module()->get_int32_type(), bb);
+}
+
+FpToSiInst::FpToSiInst(Value *val, Type *ty, BasicBlock *bb)
+    : BaseInst<FpToSiInst>(ty, fptosi, bb) {
+    assert(val->get_type()->is_float_type() &&
+           "FpToSiInst operand is not float");
+    assert(ty->is_integer_type() &&
+           "FpToSiInst destination type is not integer");
+    add_operand(val);
+}
+
+FpToSiInst *FpToSiInst::create_fptosi(Value *val, Type *ty, BasicBlock *bb) {
+    return create(val, ty, bb);
+}
+FpToSiInst *FpToSiInst::create_fptosi_to_i32(Value *val, BasicBlock *bb) {
+    return create(val, bb->get_module()->get_int32_type(), bb);
+}
+
+SiToFpInst::SiToFpInst(Value *val, Type *ty, BasicBlock *bb)
+    : BaseInst<SiToFpInst>(ty, sitofp, bb) {
+    assert(val->get_type()->is_integer_type() &&
+           "SiToFpInst operand is not integer");
+    assert(ty->is_float_type() && "SiToFpInst destination type is not float");
+    add_operand(val);
+}
+
+SiToFpInst *SiToFpInst::create_sitofp(Value *val, BasicBlock *bb) {
+    return create(val, bb->get_module()->get_float_type(), bb);
+}
+
+PhiInst::PhiInst(Type *ty, std::vector<Value *> vals,
+                 std::vector<BasicBlock *> val_bbs, BasicBlock *bb)
+    : BaseInst<PhiInst>(ty, phi) {
+    assert(vals.size() == val_bbs.size() && "Unmatched vals and bbs");
+    for (unsigned i = 0; i < vals.size(); i++) {
+        assert(ty == vals[i]->get_type() && "Bad type for phi");
+        add_operand(vals[i]);
+        add_operand(val_bbs[i]);
+    }
+    this->set_parent(bb);
+}
+
+PhiInst *PhiInst::create_phi(Type *ty, BasicBlock *bb,
+                             std::vector<Value *> vals,
+                             std::vector<BasicBlock *> val_bbs) {
+    return create(ty, vals, val_bbs, bb);
+}
diff --git a/src/lightir/Module.cpp b/src/lightir/Module.cpp
new file mode 100644
index 0000000..daf62e4
--- /dev/null
+++ b/src/lightir/Module.cpp
@@ -0,0 +1,80 @@
+#include "Module.hpp"
+#include "Function.hpp"
+#include "GlobalVariable.hpp"
+
+#include <memory>
+#include <string>
+
+Module::Module() {
+    void_ty_ = std::make_unique<Type>(Type::VoidTyID, this);
+    label_ty_ = std::make_unique<Type>(Type::LabelTyID, this);
+    int1_ty_ = std::make_unique<IntegerType>(1, this);
+    int32_ty_ = std::make_unique<IntegerType>(32, this);
+    float32_ty_ = std::make_unique<FloatType>(this);
+}
+
+Type *Module::get_void_type() { return void_ty_.get(); }
+Type *Module::get_label_type() { return label_ty_.get(); }
+IntegerType *Module::get_int1_type() { return int1_ty_.get(); }
+IntegerType *Module::get_int32_type() { return int32_ty_.get(); }
+FloatType *Module::get_float_type() { return float32_ty_.get(); }
+PointerType *Module::get_int32_ptr_type() {
+    return get_pointer_type(int32_ty_.get());
+}
+PointerType *Module::get_float_ptr_type() {
+    return get_pointer_type(float32_ty_.get());
+}
+
+PointerType *Module::get_pointer_type(Type *contained) {
+    if (pointer_map_.find(contained) == pointer_map_.end()) {
+        pointer_map_[contained] = std::make_unique<PointerType>(contained);
+    }
+    return pointer_map_[contained].get();
+}
+
+ArrayType *Module::get_array_type(Type *contained, unsigned num_elements) {
+    if (array_map_.find({contained, num_elements}) == array_map_.end()) {
+        array_map_[{contained, num_elements}] =
+            std::make_unique<ArrayType>(contained, num_elements);
+    }
+    return array_map_[{contained, num_elements}].get();
+}
+
+FunctionType *Module::get_function_type(Type *retty,
+                                        std::vector<Type *> &args) {
+    if (not function_map_.count({retty, args})) {
+        function_map_[{retty, args}] =
+            std::make_unique<FunctionType>(retty, args);
+    }
+    return function_map_[{retty, args}].get();
+}
+
+void Module::add_function(Function *f) { function_list_.push_back(f); }
+llvm::ilist<Function> &Module::get_functions() { return function_list_; }
+void Module::add_global_variable(GlobalVariable *g) {
+    global_list_.push_back(g);
+}
+llvm::ilist<GlobalVariable> &Module::get_global_variable() {
+    return global_list_;
+}
+
+void Module::set_print_name() {
+    for (auto &func : this->get_functions()) {
+        func.set_instr_name();
+    }
+    return;
+}
+
+std::string Module::print() {
+    set_print_name();
+    std::string module_ir;
+    for (auto &global_val : this->global_list_) {
+        module_ir += global_val.print();
+        module_ir += "\n";
+    }
+    for (auto &func : this->function_list_) {
+        module_ir += func.print();
+        module_ir += "\n";
+    }
+    return module_ir;
+}
diff --git a/src/lightir/Type.cpp b/src/lightir/Type.cpp
new file mode 100644
index 0000000..30a0313
--- /dev/null
+++ b/src/lightir/Type.cpp
@@ -0,0 +1,181 @@
+#include "Type.hpp"
+#include "Module.hpp"
+
+#include <array>
+#include <cassert>
+#include <stdexcept>
+
+Type::Type(TypeID tid, Module *m) {
+    tid_ = tid;
+    m_ = m;
+}
+
+bool Type::is_int1_type() const {
+    return is_integer_type() and
+           static_cast<const IntegerType *>(this)->get_num_bits() == 1;
+}
+bool Type::is_int32_type() const {
+    return is_integer_type() and
+           static_cast<const IntegerType *>(this)->get_num_bits() == 32;
+}
+
+Type *Type::get_pointer_element_type() const {
+    if (this->is_pointer_type())
+        return static_cast<const PointerType *>(this)->get_element_type();
+    assert(false and "get_pointer_element_type() called on non-pointer type");
+}
+
+Type *Type::get_array_element_type() const {
+    if (this->is_array_type())
+        return static_cast<const ArrayType *>(this)->get_element_type();
+    assert(false and "get_array_element_type() called on non-array type");
+}
+
+unsigned Type::get_size() const {
+    switch (get_type_id()) {
+    case IntegerTyID: {
+        if (is_int1_type())
+            return 1;
+        else if (is_int32_type())
+            return 4;
+        else
+            assert(false && "Type::get_size(): unexpected int type bits");
+    }
+    case ArrayTyID: {
+        auto array_type = static_cast<const ArrayType *>(this);
+        auto element_size = array_type->get_element_type()->get_size();
+        auto num_elements = array_type->get_num_of_elements();
+        return element_size * num_elements;
+    }
+    case PointerTyID:
+        return 8;
+    case FloatTyID:
+        return 4;
+    case VoidTyID:
+    case LabelTyID:
+    case FunctionTyID:
+        assert(false && "bad use on get_size()");
+    }
+    assert(false && "unreachable");
+}
+
+std::string Type::print() const {
+    std::string type_ir;
+    switch (this->get_type_id()) {
+    case VoidTyID:
+        type_ir += "void";
+        break;
+    case LabelTyID:
+        type_ir += "label";
+        break;
+    case IntegerTyID:
+        type_ir += "i";
+        type_ir += std::to_string(
+            static_cast<const IntegerType *>(this)->get_num_bits());
+        break;
+    case FunctionTyID:
+        type_ir +=
+            static_cast<const FunctionType *>(this)->get_return_type()->print();
+        type_ir += " (";
+        for (unsigned i = 0;
+             i < static_cast<const FunctionType *>(this)->get_num_of_args();
+             i++) {
+            if (i)
+                type_ir += ", ";
+            type_ir += static_cast<const FunctionType *>(this)
+                           ->get_param_type(i)
+                           ->print();
+        }
+        type_ir += ")";
+        break;
+    case PointerTyID:
+        type_ir += this->get_pointer_element_type()->print();
+        type_ir += "*";
+        break;
+    case ArrayTyID:
+        type_ir += "[";
+        type_ir += std::to_string(
+            static_cast<const ArrayType *>(this)->get_num_of_elements());
+        type_ir += " x ";
+        type_ir +=
+            static_cast<const ArrayType *>(this)->get_element_type()->print();
+        type_ir += "]";
+        break;
+    case FloatTyID:
+        type_ir += "float";
+        break;
+    default:
+        break;
+    }
+    return type_ir;
+}
+
+IntegerType::IntegerType(unsigned num_bits, Module *m)
+    : Type(Type::IntegerTyID, m), num_bits_(num_bits) {}
+
+unsigned IntegerType::get_num_bits() const { return num_bits_; }
+
+FunctionType::FunctionType(Type *result, std::vector<Type *> params)
+    : Type(Type::FunctionTyID, nullptr) {
+    assert(is_valid_return_type(result) && "Invalid return type for function!");
+    result_ = result;
+
+    for (auto p : params) {
+        assert(is_valid_argument_type(p) &&
+               "Not a valid type for function argument!");
+        args_.push_back(p);
+    }
+}
+
+bool FunctionType::is_valid_return_type(Type *ty) {
+    return ty->is_integer_type() || ty->is_void_type() || ty->is_float_type();
+}
+
+bool FunctionType::is_valid_argument_type(Type *ty) {
+    return ty->is_integer_type() || ty->is_pointer_type() ||
+           ty->is_float_type();
+}
+
+FunctionType *FunctionType::get(Type *result, std::vector<Type *> params) {
+    return result->get_module()->get_function_type(result, params);
+}
+
+unsigned FunctionType::get_num_of_args() const { return args_.size(); }
+
+Type *FunctionType::get_param_type(unsigned i) const { return args_[i]; }
+
+Type *FunctionType::get_return_type() const { return result_; }
+
+ArrayType::ArrayType(Type *contained, unsigned num_elements)
+    : Type(Type::ArrayTyID, contained->get_module()),
+      num_elements_(num_elements) {
+    assert(is_valid_element_type(contained) &&
+           "Not a valid type for array element!");
+    contained_ = contained;
+}
+
+bool ArrayType::is_valid_element_type(Type *ty) {
+    return ty->is_integer_type() || ty->is_array_type() || ty->is_float_type();
+}
+
+ArrayType *ArrayType::get(Type *contained, unsigned num_elements) {
+    return contained->get_module()->get_array_type(contained, num_elements);
+}
+
+PointerType::PointerType(Type *contained)
+    : Type(Type::PointerTyID, contained->get_module()), contained_(contained) {
+    static const std::array allowed_elem_type = {
+        Type::IntegerTyID, Type::FloatTyID, Type::ArrayTyID, Type::PointerTyID};
+    auto elem_type_id = contained->get_type_id();
+    assert(std::find(allowed_elem_type.begin(), allowed_elem_type.end(),
+                     elem_type_id) != allowed_elem_type.end() &&
+           "Not allowed type for pointer");
+}
+
+PointerType *PointerType::get(Type *contained) {
+    return contained->get_module()->get_pointer_type(contained);
+}
+
+FloatType::FloatType(Module *m) : Type(Type::FloatTyID, m) {}
+
+FloatType *FloatType::get(Module *m) { return m->get_float_type(); }
diff --git a/src/lightir/User.cpp b/src/lightir/User.cpp
new file mode 100644
index 0000000..8c0f0a5
--- /dev/null
+++ b/src/lightir/User.cpp
@@ -0,0 +1,41 @@
+#include "User.hpp"
+
+#include <cassert>
+
+void User::set_operand(unsigned i, Value *v) {
+    assert(i < operands_.size() && "set_operand out of index");
+    if (operands_[i]) { // old operand
+        operands_[i]->remove_use(this, i);
+    }
+    if (v) { // new operand
+        v->add_use(this, i);
+    }
+    operands_[i] = v;
+}
+
+void User::add_operand(Value *v) {
+    assert(v != nullptr && "bad use: add_operand(nullptr)");
+    v->add_use(this, operands_.size());
+    operands_.push_back(v);
+}
+
+void User::remove_all_operands() {
+    for (unsigned i = 0; i != operands_.size(); ++i) {
+        if (operands_[i]) {
+            operands_[i]->remove_use(this, i);
+        }
+    }
+    operands_.clear();
+}
+
+void User::remove_operand(unsigned idx) {
+    assert(idx < operands_.size() && "remove_operand out of index");
+    // influence on other operands
+    for (unsigned i = idx + 1; i < operands_.size(); ++i) {
+        operands_[i]->remove_use(this, i);
+        operands_[i]->add_use(this, i - 1);
+    }
+    // remove the designated operand
+    operands_[idx]->remove_use(this, idx);
+    operands_.erase(operands_.begin() + idx);
+}
diff --git a/src/lightir/Value.cpp b/src/lightir/Value.cpp
new file mode 100644
index 0000000..90b8c6e
--- /dev/null
+++ b/src/lightir/Value.cpp
@@ -0,0 +1,43 @@
+#include "Value.hpp"
+#include "Type.hpp"
+#include "User.hpp"
+
+#include <cassert>
+
+bool Value::set_name(std::string name) {
+    if (name_ == "") {
+        name_ = name;
+        return true;
+    }
+    return false;
+}
+
+void Value::add_use(User *user, unsigned arg_no) {
+    use_list_.emplace_back(user, arg_no);
+};
+
+void Value::remove_use(User *user, unsigned arg_no) {
+    auto target_use = Use(user, arg_no);
+    use_list_.remove_if([&](const Use &use) { return use == target_use; });
+}
+
+void Value::replace_all_use_with(Value *new_val) {
+    if (this == new_val)
+        return;
+    while (use_list_.size()) {
+        auto use = use_list_.begin();
+        use->val_->set_operand(use->arg_no_, new_val);
+    }
+}
+
+void Value::replace_use_with_if(Value *new_val,
+                                std::function<bool(Use *)> should_replace) {
+    if (this == new_val)
+        return;
+    for (auto iter = use_list_.begin(); iter != use_list_.end();) {
+        auto use = *iter++;
+        if (not should_replace(&use))
+            continue;
+        use.val_->set_operand(use.arg_no_, new_val);
+    }
+}
diff --git a/src/logging/CMakeLists.txt b/src/logging/CMakeLists.txt
new file mode 100644
index 0000000..4a82d9d
--- /dev/null
+++ b/src/logging/CMakeLists.txt
@@ -0,0 +1,14 @@
+add_executable(test_ast test_ast.cpp)
+add_executable(test_logging test_logging.cpp)
+target_link_libraries(test_ast syntax common)
+target_link_libraries(test_logging common)
+
+install(
+    TARGETS test_logging
+    RUNTIME DESTINATION bin
+)
+
+install(
+    TARGETS test_ast
+    RUNTIME DESTINATION bin
+)
diff --git a/src/logging/test_ast.cpp b/src/logging/test_ast.cpp
new file mode 100644
index 0000000..2693fc2
--- /dev/null
+++ b/src/logging/test_ast.cpp
@@ -0,0 +1,15 @@
+#include "ast.hpp"
+
+#include <iostream>
+
+int main(int argc, char **argv) {
+    if (argc != 2) {
+        std::cout << "usage: " << argv[0] << " <cminus_file>" << std::endl;
+    } else {
+        auto s = parse(argv[1]);
+        auto a = AST(s);
+        auto printer = ASTPrinter();
+        a.run_visitor(printer);
+    }
+    return 0;
+}
diff --git a/src/logging/test_logging.cpp b/src/logging/test_logging.cpp
new file mode 100644
index 0000000..4b2b85d
--- /dev/null
+++ b/src/logging/test_logging.cpp
@@ -0,0 +1,12 @@
+#include "logging.hpp"
+// 引入头文件
+int main() {
+    LOG(DEBUG) << "This is DEBUG log item.";
+    // 使用关键字LOG，括号中填入要输出的日志等级
+    // 紧接着就是<<以及日志的具体信息，这一步就跟使用std::cout一样
+    LOG(INFO) << "This is INFO log item";
+    LOG(WARNING) << "This is WARNING log item";
+    LOG(ERROR) << "This is ERROR log item";
+
+    return 0;
+}
\ No newline at end of file
diff --git a/src/parser/CMakeLists.txt b/src/parser/CMakeLists.txt
new file mode 100644
index 0000000..f5b83c9
--- /dev/null
+++ b/src/parser/CMakeLists.txt
@@ -0,0 +1,26 @@
+flex_target(lex lexical_analyzer.l ${CMAKE_CURRENT_BINARY_DIR}/lexical_analyzer.c)
+bison_target(syntax syntax_analyzer.y
+  ${CMAKE_CURRENT_BINARY_DIR}/syntax_analyzer.c
+  DEFINES_FILE ${PROJECT_BINARY_DIR}/syntax_analyzer.h)
+
+add_flex_bison_dependency(lex syntax)
+add_library(syntax STATIC
+  ${BISON_syntax_OUTPUTS}
+  ${FLEX_lex_OUTPUTS}
+)
+
+include_directories(${PROJECT_BINARY_DIR})
+add_executable(parser parser.c)
+target_link_libraries(parser syntax common)
+add_executable(lexer lexer.c)
+target_link_libraries(lexer syntax common)
+
+install(
+    TARGETS parser
+    RUNTIME DESTINATION bin
+)
+
+install(
+    TARGETS lexer
+    RUNTIME DESTINATION bin
+)
diff --git a/src/parser/lexer.c b/src/parser/lexer.c
new file mode 100755
index 0000000..526456b
--- /dev/null
+++ b/src/parser/lexer.c
@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syntax_analyzer.h>
+
+///
+extern int lines;
+extern int pos_start;
+extern int pos_end;
+
+///
+extern FILE *yyin;
+extern char *yytext;
+extern int yylex();
+
+// Mac-only hack.
+YYSTYPE yylval;
+
+///
+int main(int argc, const char **argv) {
+    if (argc != 2) {
+        printf("usage: lexer input_file\n");
+        return 0;
+    }
+
+    const char *input_file = argv[1];
+    yyin = fopen(input_file, "r");
+    if (!yyin) {
+        fprintf(stderr, "cannot open file: %s\n", input_file);
+        return 1;
+    }
+
+    int token;
+    printf("%5s\t%10s\t%s\t%s\n", "Token", "Text", "Line",
+           "Column (Start,End)");
+    while ((token = yylex())) {
+        printf("%-5d\t%10s\t%d\t(%d,%d)\n", token, yytext, lines, pos_start,
+               pos_end);
+    }
+    return 0;
+}
diff --git a/src/parser/lexical_analyzer.l b/src/parser/lexical_analyzer.l
new file mode 100644
index 0000000..e3d89c9
--- /dev/null
+++ b/src/parser/lexical_analyzer.l
@@ -0,0 +1,46 @@
+%option noyywrap
+%{
+/*****************声明和选项设置  begin*****************/
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "syntax_tree.h"
+#include "syntax_analyzer.h"
+
+int lines=1;
+int pos_start=1;
+int pos_end=1;
+
+void pass_node(char *text){
+     yylval.node = new_syntax_tree_node(text);
+}
+
+/*****************声明和选项设置  end*****************/
+
+%}
+
+%x COMMENT
+
+%%
+ /* to do for students */
+ /* two cases for you, pass_node will send flex's token to bison */
+\+ 	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return ADD;}
+\-	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return SUB;}
+\*	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return MUL;}
+\/	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return DIV;}
+\<	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return LT;}
+\<=	{pos_start = pos_end; pos_end += 2; pass_node(yytext); return LTE;}
+\>	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return GT;}
+\>=	{pos_start = pos_end; pos_end += 2; pass_node(yytext); return GTE;}
+==	{pos_start = pos_end; pos_end += 2; pass_node(yytext); return EQ;}
+!=	{pos_start = pos_end; pos_end += 2; pass_node(yytext); return NEQ;}
+=	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return ASSIGN;}
+;	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return SEMICOLON;}
+,	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return COMMA;}
+ /* TODO: phase1. 请在这里补充其他的词法规则 */
+
+
+. { pos_start = pos_end; pos_end++; return ERROR; }
+
+ /****请在此补全所有flex的模式与动作  end******/
+%%
diff --git a/src/parser/parser.c b/src/parser/parser.c
new file mode 100644
index 0000000..174e392
--- /dev/null
+++ b/src/parser/parser.c
@@ -0,0 +1,20 @@
+#include "syntax_tree.h"
+extern syntax_tree *parse(const char *);
+
+int main(int argc, char *argv[]) {
+    syntax_tree *tree = NULL;
+    const char *input = NULL;
+
+    if (argc == 2) {
+        input = argv[1];
+    } else if (argc >= 3) {
+        printf("usage: %s <cminus_file>\n", argv[0]);
+        return 1;
+    }
+
+    // Call the syntax analyzer.
+    tree = parse(input);
+    print_syntax_tree(stdout, tree);
+    del_syntax_tree(tree);
+    return 0;
+}
diff --git a/src/parser/syntax_analyzer.y b/src/parser/syntax_analyzer.y
new file mode 100644
index 0000000..71a07ec
--- /dev/null
+++ b/src/parser/syntax_analyzer.y
@@ -0,0 +1,181 @@
+%{
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "syntax_tree.h"
+
+// external functions from lex
+extern int yylex();
+extern int yyparse();
+extern int yyrestart();
+extern FILE * yyin;
+
+// external variables from lexical_analyzer module
+extern int lines;
+extern char * yytext;
+extern int pos_end;
+extern int pos_start;
+
+// Global syntax tree
+syntax_tree *gt;
+
+// Error reporting
+void yyerror(const char *s);
+
+// Helper functions written for you with love
+syntax_tree_node *node(const char *node_name, int children_num, ...);
+%}
+
+/* Complete this definition.
+   Hint: See pass_node(), node(), and syntax_tree.h.
+         Use forward declaring. */
+%union {
+     struct _syntax_tree_node * node;
+	 char * name;
+}
+
+/* Your tokens here. */
+%token <node> ERROR
+%token <node> ADD
+%token <node> SUB
+%token <node> MUL
+%token <node> DIV
+%token <node> LT
+%token <node> LTE
+%token <node> GT
+%token <node> GTE
+%token <node> EQ
+%token <node> NEQ
+%token <node> ASSIGN
+%token <node> SEMICOLON
+%token <node> COMMA
+%token <node> LPARENTHESE
+%token <node> RPARENTHESE
+%token <node> LBRACKET
+%token <node> RBRACKET
+%token <node> LBRACE
+%token <node> RBRACE
+%token <node> ELSE
+%token <node> IF
+%token <node> INT
+%token <node> RETURN
+%token <node> VOID
+%token <node> WHILE
+%token <node> IDENTIFIER
+%token <node> INTEGER
+%token <node> FLOAT             // 这个token 对应float 关键字
+%token <node> FLOATPOINT        // 这个token 对应 浮点数值, 如果分不清的同学可以参考type-specifier的文法和对应产生式规则
+//%token <node> EOL
+//%token <node> BLANK
+//%token <node> COMMENT
+%type <node> program declaration-list declaration var-declaration type-specifier fun-declaration params param-list param compound-stmt local-declarations statement-list statement expression-stmt selection-stmt iteration-stmt return-stmt expression var simple-expression relop additive-expression addop term mulop factor integer float call args arg-list
+
+/* compulsory starting symbol */
+%start program
+
+%%
+/* Your rules here. TA has completed many */
+
+program : 	declaration-list {$$ = node( "program", 1, $1); gt->root = $$;}
+		;
+
+declaration-list 	: 	declaration-list declaration {$$ = node( "declaration-list", 2, $1, $2);}
+					|	declaration {$$ = node( "declaration-list", 1, $1);}
+					;
+
+declaration : 	var-declaration {$$ = node( "declaration", 1, $1);}
+			| 	fun-declaration {$$ = node( "declaration", 1, $1);}
+			;
+
+var-declaration : 	type-specifier IDENTIFIER SEMICOLON {$$ = node( "var-declaration", 3, $1, $2, $3);}
+                | 	type-specifier IDENTIFIER LBRACKET INTEGER RBRACKET SEMICOLON {$$ = node( "var-declaration", 6, $1, $2, $3, $4, $5, $6);}
+                ;
+
+type-specifier 	: 	INT {$$ = node( "type-specifier", 1, $1);}
+				| 	FLOAT { $$ = node( "type-specifier", 1, $1); }
+				| 	VOID {$$ = node( "type-specifier", 1, $1);}
+				;
+
+fun-declaration : 	type-specifier IDENTIFIER LPARENTHESE params RPARENTHESE compound-stmt {$$ = node( "fun-declaration", 6, $1, $2, $3, $4, $5, $6);}
+				;
+
+params 	: 	param-list {$$ = node( "params", 1, $1);}
+		|	VOID {$$ = node( "params", 1, $1);}
+		;
+
+param-list 	: 	param-list COMMA param {$$ = node( "param-list", 3, $1, $2, $3);}
+			| 	param {$$ = node( "param-list", 1, $1);}
+			;
+
+param 	: 	type-specifier IDENTIFIER {$$ = node( "param", 2, $1, $2);}
+		| 	type-specifier IDENTIFIER LBRACKET RBRACKET {$$ = node( "param", 4, $1, $2, $3, $4);}
+		;
+
+compound-stmt 	: 	LBRACE local-declarations statement-list RBRACE {$$ = node( "compound-stmt", 4, $1, $2, $3, $4);}
+				;
+
+local-declarations 	: 	local-declarations var-declaration {$$ = node( "local-declarations", 2, $1, $2);}
+| 	{$$ = node( "local-declarations",0);}
+					;
+
+statement-list 	: 	statement-list statement {$$ = node( "statement-list", 2, $1, $2);}
+| 	{$$ = node( "statement-list",0);}
+                    ;
+// TODO: phase1. 补充其他的文法产生式逻辑
+
+%%
+
+/// The error reporting function.
+void yyerror(const char * s)
+{
+    // TO STUDENTS: This is just an example.
+    // You can customize it as you like.
+    fprintf(stderr, "error at line %d column %d: %s\n", lines, pos_start, s);
+}
+
+/// Parse input from file `input_path`, and prints the parsing results
+/// to stdout.  If input_path is NULL, read from stdin.
+///
+/// This function initializes essential states before running yyparse().
+syntax_tree *parse(const char *input_path)
+{
+    if (input_path != NULL) {
+        if (!(yyin = fopen(input_path, "r"))) {
+            fprintf(stderr, "[ERR] Open input file %s failed.\n", input_path);
+            exit(1);
+        }
+    } else {
+        yyin = stdin;
+    }
+
+    lines = pos_start = pos_end = 1;
+    gt = new_syntax_tree();
+    yyrestart(yyin);
+    yyparse();
+    return gt;
+}
+
+/// A helper function to quickly construct a tree node.
+///
+/// e.g. $$ = node("program", 1, $1);
+syntax_tree_node *node(const char *name, int children_num, ...)
+{
+    syntax_tree_node *p = new_syntax_tree_node(name);
+    syntax_tree_node *child;
+    // 这里表示 epsilon结点是通过 children_num == 0 来判断的
+    if (children_num == 0) {
+        child = new_syntax_tree_node("epsilon");
+        syntax_tree_add_child(p, child);
+    } else {
+        va_list ap;
+        va_start(ap, children_num);
+        for (int i = 0; i < children_num; ++i) {
+            child = va_arg(ap, syntax_tree_node *);
+            syntax_tree_add_child(p, child);
+        }
+        va_end(ap);
+    }
+    return p;
+}
diff --git a/tests/1-parser/cleanup.sh b/tests/1-parser/cleanup.sh
new file mode 100755
index 0000000..0fe99f1
--- /dev/null
+++ b/tests/1-parser/cleanup.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+rm -rf output_student/*
+rm -rf output_student_ast/*
diff --git a/tests/1-parser/eval_phase1.sh b/tests/1-parser/eval_phase1.sh
new file mode 100755
index 0000000..4618cdd
--- /dev/null
+++ b/tests/1-parser/eval_phase1.sh
@@ -0,0 +1,109 @@
+#!/bin/bash
+
+# DO NOT MODIFY!
+# If you need customized behavior, please create your own script.
+
+function run_tests() {
+    local TESTCASE_DIR=$1
+    local OUTPUT_DIR=$2
+    local OUTPUT_STD_DIR=$3
+    local score=0
+    local total=0
+
+    mkdir -p "$OUTPUT_DIR"
+
+    # 对每个 .cminus 文件生成 syntax_tree 文件
+    for testcase in "$TESTCASE_DIR"/*.cminus; do
+        filename="$(basename "$testcase")"
+
+        echo "[info] Analyzing $filename"
+        
+        # 生成学生的 syntax_tree 文件
+        "$BUILD_DIR"/parser "$testcase" > "$OUTPUT_DIR/${filename%.cminus}.syntax_tree"
+        
+        # 比较当前文件的输出与标准输出
+        if [[ ${2:-no} != "no" ]]; then
+            echo "[info] Comparing $filename..."
+            
+            # 如果是详细模式
+            if [[ ${2:-no} == "verbose" ]]; then
+                diff "$OUTPUT_DIR/${filename%.cminus}.syntax_tree" "$OUTPUT_STD_DIR/${filename%.cminus}.syntax_tree"
+            else
+                diff -q "$OUTPUT_DIR/${filename%.cminus}.syntax_tree" "$OUTPUT_STD_DIR/${filename%.cminus}.syntax_tree"
+            fi
+
+            # 检查 diff 的返回值
+            if [ $? -eq 0 ]; then
+                echo "[info] $filename is correct!"
+                let score=score+1   # 正确时得分+1
+            else
+                echo "[info] $filename differs from the expected output."
+            fi
+        fi
+
+        let total=total+1  # 总文件数+1
+
+        rm -f "$CUR_DIR/${filename%.cminus}"
+    done
+
+    # 输出当前测试集的得分
+    echo "[info] Score for $TESTCASE_DIR: $score/$total"
+    return $score
+}
+
+# 检查命令行参数是否足够
+if [[ $# -lt 1 ]]; then
+    echo "usage: ./eval_phase1.sh   <input> [<summary>]"
+    echo "       <input> can be one of 'easy', 'normal', 'hard', 'testcases_general', or '-all'."
+    echo "       <summary> can be one of 'no', 'yes', and 'verbose'. the default value is 'no'"
+    exit 1
+fi
+
+CUR_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
+BUILD_DIR="$CUR_DIR/../../build"
+
+# 检查是否使用了 -all 选项
+if [[ $1 == "-all" ]]; then
+    TOTAL_SCORE=0
+    TOTAL_FILES=0
+    # 定义四个测试集
+    TESTCASES=("easy" "normal" "hard" "testcases_general")
+
+    for TESTCASE in "${TESTCASES[@]}"; do
+        if [[ $TESTCASE == "testcases_general" ]]; then
+            TESTCASE_DIR="$CUR_DIR/../$TESTCASE"
+        else
+            TESTCASE_DIR="$CUR_DIR/input/$TESTCASE"
+        fi
+        OUTPUT_DIR="$CUR_DIR/output_student/$TESTCASE"
+        OUTPUT_STD_DIR="$CUR_DIR/output_standard/$TESTCASE"
+
+        # 计算有效文件数
+        VALID_FILES=$(find "$TESTCASE_DIR" -maxdepth 1 -name '*.cminus' | wc -l)
+        echo "[info] Found $VALID_FILES valid files in $TESTCASE_DIR"
+
+        run_tests "$TESTCASE_DIR" "$OUTPUT_DIR" "$OUTPUT_STD_DIR" $2
+        CURRENT_SCORE=$?
+
+        let TOTAL_SCORE+=CURRENT_SCORE
+        TOTAL_FILES=$(($TOTAL_FILES + $VALID_FILES))
+    done
+
+    # 输出总分
+    echo "[info] Total score for all testcases: $TOTAL_SCORE/$TOTAL_FILES"
+
+else
+    # 单个测试集处理
+    TESTCASE="$1"
+    if [[ $TESTCASE == "easy" || $TESTCASE == "normal" || $TESTCASE == "hard" ]]; then
+        TESTCASE_DIR="$CUR_DIR/input/$TESTCASE"
+    elif [[ $TESTCASE == "testcases_general" ]]; then
+        TESTCASE_DIR="$CUR_DIR/../$TESTCASE"
+    fi
+
+    OUTPUT_DIR="$CUR_DIR/output_student/$TESTCASE"
+    OUTPUT_STD_DIR="$CUR_DIR/output_standard/$TESTCASE"
+
+    # 运行单个测试集
+    run_tests "$TESTCASE_DIR" "$OUTPUT_DIR" "$OUTPUT_STD_DIR" $2
+fi
\ No newline at end of file
diff --git a/tests/1-parser/eval_phase2.sh b/tests/1-parser/eval_phase2.sh
new file mode 100755
index 0000000..74626fe
--- /dev/null
+++ b/tests/1-parser/eval_phase2.sh
@@ -0,0 +1,116 @@
+#!/bin/bash
+
+# DO NOT MODIFY!
+# If you need customized behavior, please create your own script.
+
+function run_tests() {
+    local TESTCASE_DIR=$1
+    local OUTPUT_DIR=$2
+    local OUTPUT_STD_DIR=$3
+    local score=0
+    local total=0
+
+    mkdir -p "$OUTPUT_DIR"
+
+    # 对每个 .cminus 文件生成 ast 文件
+    for testcase in "$TESTCASE_DIR"/*.cminus; do
+        filename="$(basename "$testcase")"
+
+        # 检查文件名是否以 FAIL 开头，跳过该文件
+        if [[ "$filename" == FAIL* ]]; then
+            echo "[info] Skipping $filename (starts with FAIL)"
+            continue
+        fi
+
+        echo "[info] Analyzing $filename"
+        
+        # 生成学生的 AST 文件
+        "$BUILD_DIR"/cminusfc -emit-ast "$testcase" > "$OUTPUT_DIR/${filename%.cminus}.ast"
+        
+        # 比较当前文件的输出与标准输出
+        if [[ ${2:-no} != "no" ]]; then
+            echo "[info] Comparing $filename..."
+            
+            # 如果是详细模式
+            if [[ ${2:-no} == "verbose" ]]; then
+                diff "$OUTPUT_DIR/${filename%.cminus}.ast" "$OUTPUT_STD_DIR/${filename%.cminus}.ast"
+            else
+                diff -q "$OUTPUT_DIR/${filename%.cminus}.ast" "$OUTPUT_STD_DIR/${filename%.cminus}.ast"
+            fi
+
+            # 检查 diff 的返回值
+            if [ $? -eq 0 ]; then
+                echo "[info] $filename is correct!"
+                let score=score+1   # 正确时得分+1
+            else
+                echo "[info] $filename differs from the expected output."
+            fi
+        fi
+
+        let total=total+1  # 总文件数+1
+
+        rm -f "$CUR_DIR/${filename%.cminus}"
+    done
+
+    # 输出当前测试集的得分
+    echo "[info] Score for $TESTCASE_DIR: $score/$total"
+    return $score
+}
+
+# 检查命令行参数是否足够
+if [[ $# -lt 1 ]]; then
+    echo "usage: ./eval_phase2.sh   <input> [<summary>]"
+    echo "       <input> can be one of 'easy', 'normal', 'hard', 'testcases_general', or '-all'."
+    echo "       <summary> can be one of 'no', 'yes', and 'verbose'. the default value is 'no'"
+    exit 1
+fi
+
+CUR_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
+BUILD_DIR="$CUR_DIR/../../build"
+
+# 检查是否使用了 -all 选项
+if [[ $1 == "-all" ]]; then
+    TOTAL_SCORE=0
+    TOTAL_FILES=0
+    # 定义四个测试集
+    TESTCASES=("easy" "normal" "hard" "testcases_general")
+
+    for TESTCASE in "${TESTCASES[@]}"; do
+        if [[ $TESTCASE == "testcases_general" ]]; then
+            TESTCASE_DIR="$CUR_DIR/../$TESTCASE"
+        else
+            TESTCASE_DIR="$CUR_DIR/input/$TESTCASE"
+        fi
+        OUTPUT_DIR="$CUR_DIR/output_student_ast/$TESTCASE"
+        OUTPUT_STD_DIR="$CUR_DIR/output_standard_ast/$TESTCASE"
+
+        # 计算有效文件数，跳过以 FAIL 开头的文件
+        VALID_FILES=$(find "$TESTCASE_DIR" -maxdepth 1 -name '*.cminus' ! -name 'FAIL*' | wc -l)
+        echo "[info] Found $VALID_FILES valid files in $TESTCASE_DIR"
+
+        # 运行测试集并跳过以 FAIL 开头的文件
+        run_tests "$TESTCASE_DIR" "$OUTPUT_DIR" "$OUTPUT_STD_DIR" $2
+        CURRENT_SCORE=$?
+
+        let TOTAL_SCORE+=CURRENT_SCORE
+        TOTAL_FILES=$(($TOTAL_FILES + $VALID_FILES))
+    done
+
+    # 输出总分
+    echo "[info] Total score for all testcases: $TOTAL_SCORE/$TOTAL_FILES"
+
+else
+    # 单个测试集处理
+    TESTCASE="$1"
+    if [[ $TESTCASE == "easy" || $TESTCASE == "normal" || $TESTCASE == "hard" ]]; then
+        TESTCASE_DIR="$CUR_DIR/input/$TESTCASE"
+    elif [[ $TESTCASE == "testcases_general" ]]; then
+        TESTCASE_DIR="$CUR_DIR/../$TESTCASE"
+    fi
+
+    OUTPUT_DIR="$CUR_DIR/output_student_ast/$TESTCASE"
+    OUTPUT_STD_DIR="$CUR_DIR/output_standard_ast/$TESTCASE"
+
+    # 运行单个测试集
+    run_tests "$TESTCASE_DIR" "$OUTPUT_DIR" "$OUTPUT_STD_DIR" $2
+fi
\ No newline at end of file
diff --git a/tests/1-parser/input/easy/FAIL_comment.cminus b/tests/1-parser/input/easy/FAIL_comment.cminus
new file mode 100644
index 0000000..e496908
--- /dev/null
+++ b/tests/1-parser/input/easy/FAIL_comment.cminus
@@ -0,0 +1 @@
+/* unclosed comment
\ No newline at end of file
diff --git a/tests/1-parser/input/easy/FAIL_comment2.cminus b/tests/1-parser/input/easy/FAIL_comment2.cminus
new file mode 100644
index 0000000..a9af229
--- /dev/null
+++ b/tests/1-parser/input/easy/FAIL_comment2.cminus
@@ -0,0 +1,5 @@
+// cminus dont support comment like that
+
+int main(void){
+    return 0;
+}
\ No newline at end of file
diff --git a/tests/1-parser/input/easy/FAIL_function.cminus b/tests/1-parser/input/easy/FAIL_function.cminus
new file mode 100644
index 0000000..869c521
--- /dev/null
+++ b/tests/1-parser/input/easy/FAIL_function.cminus
@@ -0,0 +1,3 @@
+/* unclosed function */
+int main(void)
+{
\ No newline at end of file
diff --git a/tests/1-parser/input/easy/FAIL_id.cminus b/tests/1-parser/input/easy/FAIL_id.cminus
new file mode 100644
index 0000000..b3d6508
--- /dev/null
+++ b/tests/1-parser/input/easy/FAIL_id.cminus
@@ -0,0 +1,3 @@
+int a1;
+int f1(void) {}
+int f2(void) {}
diff --git a/tests/1-parser/input/easy/expr.cminus b/tests/1-parser/input/easy/expr.cminus
new file mode 100644
index 0000000..787f1ca
--- /dev/null
+++ b/tests/1-parser/input/easy/expr.cminus
@@ -0,0 +1,16 @@
+/*Basic num part*/
+int main(void){
+    a = 0;
+
+    x = 0.0;
+    x = 1.;
+    x = .1;
+
+    a = 1+1;
+    a = a-1;
+
+    x = x*1;
+    x = a/x;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/tests/1-parser/input/easy/id.cminus b/tests/1-parser/input/easy/id.cminus
new file mode 100644
index 0000000..b6cf78b
--- /dev/null
+++ b/tests/1-parser/input/easy/id.cminus
@@ -0,0 +1,3 @@
+int a;
+int f(void) {}
+int g(void) {}
diff --git a/tests/1-parser/input/hard/You_Should_Pass.cminus b/tests/1-parser/input/hard/You_Should_Pass.cminus
new file mode 100644
index 0000000..33dd800
--- /dev/null
+++ b/tests/1-parser/input/hard/You_Should_Pass.cminus
@@ -0,0 +1,33 @@
+/*
+    I konw it's weird, even stupid, to code C like this. w(ﾟДﾟ)w
+    HOWEVER, we have to use some tricky cases to test your answer.
+*/
+
+float GVAR;
+void NeverEverDeclareLikeThis;
+int GARRAY[2333];
+
+void MyFuncA(int floatNum, float intNum, void voidNums[]){
+    int IKnowYouAreVoid;
+    return MyFuncB(IKnowYouAreVoid);
+}
+
+float MyFuncB(void){
+    int IAmVoid[0];
+    return MyFuncA(.0, 0, IAmVoid);
+}
+
+int main(void){
+
+    int a; int b; int c;
+
+    a = b = c = (85 == 84 + 0.4);
+
+    if(a = b){
+        GARRAY[ ( MyFuncB() ) ] = GARRAY[c = 1.*.1 == 1.1];
+    }else if (MyFuncC(NotDeclared)){
+
+    }else;
+
+    return 0.;
+}
\ No newline at end of file
diff --git a/tests/1-parser/input/hard/assoc.cminus b/tests/1-parser/input/hard/assoc.cminus
new file mode 100644
index 0000000..527a92f
--- /dev/null
+++ b/tests/1-parser/input/hard/assoc.cminus
@@ -0,0 +1,5 @@
+/* associativity and precedence */
+int main(void)
+{
+  a = b = c = 1 + 1 / 2 * 1 * (1 + 1 + 1 - 1 / 1) + 3 + 4 * 3;
+}
diff --git a/tests/1-parser/input/hard/gcd.cminus b/tests/1-parser/input/hard/gcd.cminus
new file mode 100644
index 0000000..c872500
--- /dev/null
+++ b/tests/1-parser/input/hard/gcd.cminus
@@ -0,0 +1,16 @@
+int gcd (int u, int v) { /* calculate the gcd of u and v */
+    if (v == 0) return u;
+    else return gcd(v, u - u / v * v); /* v,u-u/v*v is equals to u mod v*/
+}
+int main(void) {
+        int x; int y; int temp;
+    x = 72;
+        y = 18;
+    if (x<y) {
+        temp = x;
+        x = y;
+        y = temp;
+    }
+    gcd(x,y);
+    return 0;
+}
diff --git a/tests/1-parser/input/hard/hanoi.cminus b/tests/1-parser/input/hard/hanoi.cminus
new file mode 100644
index 0000000..a9049ca
--- /dev/null
+++ b/tests/1-parser/input/hard/hanoi.cminus
@@ -0,0 +1,27 @@
+void move(int x, int y)
+{
+    putint(x); putch(32); putint(y); putch(44); putch(32);
+}
+
+void hanoi(int n, int one, int two, int three)
+{
+    if (n == 1)
+        move(one, three);
+    else {
+        hanoi(n - 1, one, three, two);
+        move(one, three);
+        hanoi(n - 1, two, one, three);
+    }
+}
+
+int main(void )
+{
+    int n;
+    n = getint();
+    while (n > 0) {
+        hanoi(getint(), 1, 2, 3);
+        putch(10);
+        n = n - 1;
+    }
+    return 0;
+}
diff --git a/tests/1-parser/input/hard/if.cminus b/tests/1-parser/input/hard/if.cminus
new file mode 100644
index 0000000..1eddf0a
--- /dev/null
+++ b/tests/1-parser/input/hard/if.cminus
@@ -0,0 +1,6 @@
+/* else should be bound to the closest if */
+int main(void)
+{
+  if (1) {} else if (2) {} else {}
+  return 0;
+}
diff --git a/tests/1-parser/input/hard/selectionsort.cminus b/tests/1-parser/input/hard/selectionsort.cminus
new file mode 100644
index 0000000..0719343
--- /dev/null
+++ b/tests/1-parser/input/hard/selectionsort.cminus
@@ -0,0 +1,42 @@
+/* this is the sample program in C- in the book "Compiler Construction" */
+/* A program to perform selection sort on a 10 element array. */
+int x[10];
+int minloc ( int a[], int low, int high )
+{ int i; int x; int k;
+  k = low;
+  x = a[low];
+  i = low + 1;
+  while (i < high)
+    { if (a[i] < x)
+      { x = a[i];
+        k = i; }
+      i = i + 1;
+     }
+  return k;
+ }
+
+ void sort( int a[], int low, int high)
+ { int i; int k;
+   i = low;
+   while ( i < high-1)
+   { int t;
+     k = minloc(a, i, high);
+     t = a[k];
+     a[k] = a[i];
+     a[i] = t;
+     i = i + 1;
+  }
+ }
+
+ void main(void)
+ {  int i;
+   i = 0;
+   while ( i < 10)
+     {  x[i] = input();
+       i = i + 1; }
+   sort(x, 0, 10);
+   i = 0;
+   while (i < 10)
+     { output(x[i]);
+       i = i + 1; }
+ }
diff --git a/tests/1-parser/input/normal/FAIL_assign.cminus b/tests/1-parser/input/normal/FAIL_assign.cminus
new file mode 100644
index 0000000..605bfa0
--- /dev/null
+++ b/tests/1-parser/input/normal/FAIL_assign.cminus
@@ -0,0 +1,5 @@
+int main(void)
+{
+  a=1;
+  1=a;
+}
diff --git a/tests/1-parser/input/normal/FAIL_local-decl.cminus b/tests/1-parser/input/normal/FAIL_local-decl.cminus
new file mode 100644
index 0000000..bab7f08
--- /dev/null
+++ b/tests/1-parser/input/normal/FAIL_local-decl.cminus
@@ -0,0 +1,6 @@
+int main(void){
+    int a;
+    a = 1;
+    int b;
+    return 0;
+}
\ No newline at end of file
diff --git a/tests/1-parser/input/normal/array.cminus b/tests/1-parser/input/normal/array.cminus
new file mode 100644
index 0000000..3d1cab5
--- /dev/null
+++ b/tests/1-parser/input/normal/array.cminus
@@ -0,0 +1,5 @@
+int main(void) {
+	int array[1];
+	array[1] = 0;
+	return 0;
+}
diff --git a/tests/1-parser/input/normal/func.cminus b/tests/1-parser/input/normal/func.cminus
new file mode 100644
index 0000000..6907c2b
--- /dev/null
+++ b/tests/1-parser/input/normal/func.cminus
@@ -0,0 +1,7 @@
+float foo(float a, float b[]) {
+	return 1;
+}
+
+int main(void) {
+	return 0;
+}
diff --git a/tests/1-parser/input/normal/if.cminus b/tests/1-parser/input/normal/if.cminus
new file mode 100644
index 0000000..d892bd9
--- /dev/null
+++ b/tests/1-parser/input/normal/if.cminus
@@ -0,0 +1,17 @@
+/*Basic selection part*/
+
+int main(void){
+    int a; int b;
+
+    a = 1;
+    b = 1;
+
+    if(a != b){
+        if(a == b);
+        else{
+            a = b;
+        }
+    }
+
+    return 0;
+}
\ No newline at end of file
diff --git a/tests/1-parser/input/normal/local-decl.cminus b/tests/1-parser/input/normal/local-decl.cminus
new file mode 100644
index 0000000..7ee0599
--- /dev/null
+++ b/tests/1-parser/input/normal/local-decl.cminus
@@ -0,0 +1,5 @@
+int main(void) {
+	int i; float j;
+	void v;
+	return 0;
+}
diff --git a/tests/1-parser/input/normal/skip_spaces.cminus b/tests/1-parser/input/normal/skip_spaces.cminus
new file mode 100644
index 0000000..5233ded
--- /dev/null
+++ b/tests/1-parser/input/normal/skip_spaces.cminus
@@ -0,0 +1,28 @@
+/*
+
+int main() {
+  int arr[100];
+  int i;
+  int sum;
+  i = 0;
+  sum = 0;
+  while (getint()) {
+  	arr[i] = getint();
+    i = i + 1;
+  }*/
+int main(void) {
+  int arr[100];
+  int i;
+  int sum;
+  i = 0;
+  sum = 0;
+  while (getint()) {
+  	arr[i] = getint();
+    i = i + 1;
+  }
+	while (i) {
+    i = i - 1;
+    sum = sum + arr[i];
+  }
+  return sum - 79;
+}
diff --git a/tests/1-parser/output_standard/easy/FAIL_comment.syntax_tree b/tests/1-parser/output_standard/easy/FAIL_comment.syntax_tree
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard/easy/FAIL_comment2.syntax_tree b/tests/1-parser/output_standard/easy/FAIL_comment2.syntax_tree
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard/easy/FAIL_function.syntax_tree b/tests/1-parser/output_standard/easy/FAIL_function.syntax_tree
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard/easy/FAIL_id.syntax_tree b/tests/1-parser/output_standard/easy/FAIL_id.syntax_tree
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard/easy/expr.syntax_tree b/tests/1-parser/output_standard/easy/expr.syntax_tree
new file mode 100644
index 0000000..9ebc417
--- /dev/null
+++ b/tests/1-parser/output_standard/easy/expr.syntax_tree
@@ -0,0 +1,176 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0.0
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1.
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* .1
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* *
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* /
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/easy/id.syntax_tree b/tests/1-parser/output_standard/easy/id.syntax_tree
new file mode 100644
index 0000000..7ca2718
--- /dev/null
+++ b/tests/1-parser/output_standard/easy/id.syntax_tree
@@ -0,0 +1,42 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration-list
+|  |  |  |  >--+ declaration
+|  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  >--* a
+|  |  |  |  |  |  >--* ;
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* int
+|  |  |  |  |  >--* f
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--* void
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* g
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/hard/You_Should_Pass.syntax_tree b/tests/1-parser/output_standard/hard/You_Should_Pass.syntax_tree
new file mode 100644
index 0000000..d3cc5dc
--- /dev/null
+++ b/tests/1-parser/output_standard/hard/You_Should_Pass.syntax_tree
@@ -0,0 +1,369 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration-list
+|  |  |  |  >--+ declaration-list
+|  |  |  |  |  >--+ declaration-list
+|  |  |  |  |  |  >--+ declaration-list
+|  |  |  |  |  |  |  >--+ declaration
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* float
+|  |  |  |  |  |  |  |  |  >--* GVAR
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ declaration
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* void
+|  |  |  |  |  |  |  |  >--* NeverEverDeclareLikeThis
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ declaration
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* GARRAY
+|  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  >--* 2333
+|  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  >--+ declaration
+|  |  |  |  |  >--+ fun-declaration
+|  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  >--* void
+|  |  |  |  |  |  >--* MyFuncA
+|  |  |  |  |  |  >--* (
+|  |  |  |  |  |  >--+ params
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  |  >--* floatNum
+|  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  >--* float
+|  |  |  |  |  |  |  |  |  |  >--* intNum
+|  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* void
+|  |  |  |  |  |  |  |  |  >--* voidNums
+|  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  >--* )
+|  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* IKnowYouAreVoid
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* MyFuncB
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* IKnowYouAreVoid
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--* }
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* float
+|  |  |  |  |  >--* MyFuncB
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--* void
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* IAmVoid
+|  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* MyFuncA
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* .0
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* IAmVoid
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* c
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* c
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 85
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ==
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 84
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0.4
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* GARRAY
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* MyFuncB
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* GARRAY
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* c
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1.
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* *
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* .1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ==
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1.1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* MyFuncC
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* NotDeclared
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0.
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/hard/assoc.syntax_tree b/tests/1-parser/output_standard/hard/assoc.syntax_tree
new file mode 100644
index 0000000..8420eb9
--- /dev/null
+++ b/tests/1-parser/output_standard/hard/assoc.syntax_tree
@@ -0,0 +1,120 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* c
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* /
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 2
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* *
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* *
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* /
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 3
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 4
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* *
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 3
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/hard/gcd.syntax_tree b/tests/1-parser/output_standard/hard/gcd.syntax_tree
new file mode 100644
index 0000000..a2b03f9
--- /dev/null
+++ b/tests/1-parser/output_standard/hard/gcd.syntax_tree
@@ -0,0 +1,291 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* int
+|  |  |  |  |  >--* gcd
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ==
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* gcd
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* /
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* *
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* temp
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 72
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 18
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* temp
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* temp
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* gcd
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/hard/hanoi.syntax_tree b/tests/1-parser/output_standard/hard/hanoi.syntax_tree
new file mode 100644
index 0000000..f91ceec
--- /dev/null
+++ b/tests/1-parser/output_standard/hard/hanoi.syntax_tree
@@ -0,0 +1,558 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration-list
+|  |  |  |  >--+ declaration
+|  |  |  |  |  >--+ fun-declaration
+|  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  >--* void
+|  |  |  |  |  |  >--* move
+|  |  |  |  |  |  >--* (
+|  |  |  |  |  |  >--+ params
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  >--* )
+|  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* putint
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* putch
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 32
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* putint
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* putch
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 44
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* putch
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 32
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--* }
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* void
+|  |  |  |  |  >--* hanoi
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  >--* one
+|  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* two
+|  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* three
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ==
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* move
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* one
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* three
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* hanoi
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* one
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* three
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* two
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* move
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* one
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* three
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* hanoi
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* two
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* one
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* three
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* getint
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* >
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* hanoi
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* getint
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 2
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 3
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* putch
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* n
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/hard/if.syntax_tree b/tests/1-parser/output_standard/hard/if.syntax_tree
new file mode 100644
index 0000000..78b818c
--- /dev/null
+++ b/tests/1-parser/output_standard/hard/if.syntax_tree
@@ -0,0 +1,81 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 2
+|  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/hard/selectionsort.syntax_tree b/tests/1-parser/output_standard/hard/selectionsort.syntax_tree
new file mode 100644
index 0000000..6eb1dcc
--- /dev/null
+++ b/tests/1-parser/output_standard/hard/selectionsort.syntax_tree
@@ -0,0 +1,765 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration-list
+|  |  |  |  >--+ declaration-list
+|  |  |  |  |  >--+ declaration
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  >--+ declaration
+|  |  |  |  |  >--+ fun-declaration
+|  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  >--* minloc
+|  |  |  |  |  |  >--* (
+|  |  |  |  |  |  >--+ params
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  >--* low
+|  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* high
+|  |  |  |  |  |  >--* )
+|  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* k
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* k
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* low
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* low
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* low
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* high
+|  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* k
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* k
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--* }
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* void
+|  |  |  |  |  >--* sort
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* low
+|  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* high
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* k
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* low
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* high
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* t
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* k
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* minloc
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* high
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* t
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* k
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* k
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* t
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* input
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* sort
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* output
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/normal/FAIL_assign.syntax_tree b/tests/1-parser/output_standard/normal/FAIL_assign.syntax_tree
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard/normal/FAIL_local-decl.syntax_tree b/tests/1-parser/output_standard/normal/FAIL_local-decl.syntax_tree
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard/normal/array.syntax_tree b/tests/1-parser/output_standard/normal/array.syntax_tree
new file mode 100644
index 0000000..d5b549b
--- /dev/null
+++ b/tests/1-parser/output_standard/normal/array.syntax_tree
@@ -0,0 +1,63 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* array
+|  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* array
+|  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/normal/func.syntax_tree b/tests/1-parser/output_standard/normal/func.syntax_tree
new file mode 100644
index 0000000..6464b70
--- /dev/null
+++ b/tests/1-parser/output_standard/normal/func.syntax_tree
@@ -0,0 +1,71 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* float
+|  |  |  |  |  >--* foo
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* float
+|  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* float
+|  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/normal/if.syntax_tree b/tests/1-parser/output_standard/normal/if.syntax_tree
new file mode 100644
index 0000000..d239b5c
--- /dev/null
+++ b/tests/1-parser/output_standard/normal/if.syntax_tree
@@ -0,0 +1,147 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* !=
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ==
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/normal/local-decl.syntax_tree b/tests/1-parser/output_standard/normal/local-decl.syntax_tree
new file mode 100644
index 0000000..de7614a
--- /dev/null
+++ b/tests/1-parser/output_standard/normal/local-decl.syntax_tree
@@ -0,0 +1,48 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* float
+|  |  |  |  |  |  |  |  >--* j
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* void
+|  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/normal/skip_spaces.syntax_tree b/tests/1-parser/output_standard/normal/skip_spaces.syntax_tree
new file mode 100644
index 0000000..781d45b
--- /dev/null
+++ b/tests/1-parser/output_standard/normal/skip_spaces.syntax_tree
@@ -0,0 +1,237 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* arr
+|  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  >--* 100
+|  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* sum
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* sum
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* getint
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* arr
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* getint
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* sum
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* sum
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* arr
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* sum
+|  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 79
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/1-return.syntax_tree b/tests/1-parser/output_standard/testcases_general/1-return.syntax_tree
new file mode 100644
index 0000000..14f9156
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/1-return.syntax_tree
@@ -0,0 +1,23 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/10-funcall.syntax_tree b/tests/1-parser/output_standard/testcases_general/10-funcall.syntax_tree
new file mode 100644
index 0000000..23c02ad
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/10-funcall.syntax_tree
@@ -0,0 +1,92 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* void
+|  |  |  |  |  >--* test
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* test
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/11-funcall_chain.syntax_tree b/tests/1-parser/output_standard/testcases_general/11-funcall_chain.syntax_tree
new file mode 100644
index 0000000..d2d487b
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/11-funcall_chain.syntax_tree
@@ -0,0 +1,135 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* int
+|  |  |  |  |  >--* addone
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* result
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* result
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* addone
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* addone
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* addone
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* addone
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1230
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* result
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/12-funcall_recursion.syntax_tree b/tests/1-parser/output_standard/testcases_general/12-funcall_recursion.syntax_tree
new file mode 100644
index 0000000..7face44
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/12-funcall_recursion.syntax_tree
@@ -0,0 +1,150 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* int
+|  |  |  |  |  >--* factorial
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ==
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* *
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* factorial
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* result
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* result
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* factorial
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* result
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/13-if_stmt.syntax_tree b/tests/1-parser/output_standard/testcases_general/13-if_stmt.syntax_tree
new file mode 100644
index 0000000..15393ff
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/13-if_stmt.syntax_tree
@@ -0,0 +1,86 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 2
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 3
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 4
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/14-while_stmt.syntax_tree b/tests/1-parser/output_standard/testcases_general/14-while_stmt.syntax_tree
new file mode 100644
index 0000000..cab56f7
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/14-while_stmt.syntax_tree
@@ -0,0 +1,87 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/15-if_while.syntax_tree b/tests/1-parser/output_standard/testcases_general/15-if_while.syntax_tree
new file mode 100644
index 0000000..fbc2e5f
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/15-if_while.syntax_tree
@@ -0,0 +1,215 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 5
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/16-if_chain.syntax_tree b/tests/1-parser/output_standard/testcases_general/16-if_chain.syntax_tree
new file mode 100644
index 0000000..e9d4326
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/16-if_chain.syntax_tree
@@ -0,0 +1,147 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* c
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* c
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 2
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* c
+|  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 4
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 3
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/17-while_chain.syntax_tree b/tests/1-parser/output_standard/testcases_general/17-while_chain.syntax_tree
new file mode 100644
index 0000000..05b930f
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/17-while_chain.syntax_tree
@@ -0,0 +1,165 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* j
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* j
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ iteration-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* while
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* j
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* j
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* j
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* i
+|  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* j
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/18-global_var.syntax_tree b/tests/1-parser/output_standard/testcases_general/18-global_var.syntax_tree
new file mode 100644
index 0000000..17be8b9
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/18-global_var.syntax_tree
@@ -0,0 +1,52 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration
+|  |  |  |  >--+ var-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* int
+|  |  |  |  |  >--* a
+|  |  |  |  |  >--* ;
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/19-global_local_var.syntax_tree b/tests/1-parser/output_standard/testcases_general/19-global_local_var.syntax_tree
new file mode 100644
index 0000000..8fb61e8
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/19-global_local_var.syntax_tree
@@ -0,0 +1,110 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration-list
+|  |  |  |  >--+ declaration
+|  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  >--* a
+|  |  |  |  |  |  >--* ;
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* void
+|  |  |  |  |  >--* GlobalAssign
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--* void
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* GlobalAssign
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 20
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/2-decl_int.syntax_tree b/tests/1-parser/output_standard/testcases_general/2-decl_int.syntax_tree
new file mode 100644
index 0000000..e548f2a
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/2-decl_int.syntax_tree
@@ -0,0 +1,29 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/20-gcd_array.syntax_tree b/tests/1-parser/output_standard/testcases_general/20-gcd_array.syntax_tree
new file mode 100644
index 0000000..915aaee
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/20-gcd_array.syntax_tree
@@ -0,0 +1,429 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration-list
+|  |  |  >--+ declaration-list
+|  |  |  |  >--+ declaration-list
+|  |  |  |  |  >--+ declaration-list
+|  |  |  |  |  |  >--+ declaration
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ declaration
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  >--+ declaration
+|  |  |  |  |  >--+ fun-declaration
+|  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  >--* gcd
+|  |  |  |  |  |  >--* (
+|  |  |  |  |  |  >--+ params
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  >--* )
+|  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* ==
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  >--* else
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* gcd
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* -
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* /
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ mulop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* *
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--* }
+|  |  |  >--+ declaration
+|  |  |  |  >--+ fun-declaration
+|  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  >--* int
+|  |  |  |  |  >--* funArray
+|  |  |  |  |  >--* (
+|  |  |  |  |  >--+ params
+|  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  >--+ param-list
+|  |  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  >--+ param
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  >--* )
+|  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  >--* {
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* temp
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* u
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* v
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ selection-stmt
+|  |  |  |  |  |  |  |  |  |  >--* if
+|  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  >--+ compound-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  >--* {
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* temp
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* temp
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  |  |  |  |  |  >--* }
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* gcd
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--* }
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 90
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 0
+|  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 18
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ call
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* funArray
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* (
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ args
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ arg-list
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* x
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ,
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* y
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* )
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/21-comment.syntax_tree b/tests/1-parser/output_standard/testcases_general/21-comment.syntax_tree
new file mode 100644
index 0000000..14f9156
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/21-comment.syntax_tree
@@ -0,0 +1,23 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/3-decl_float.syntax_tree b/tests/1-parser/output_standard/testcases_general/3-decl_float.syntax_tree
new file mode 100644
index 0000000..d42a019
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/3-decl_float.syntax_tree
@@ -0,0 +1,29 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* float
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/4-decl_int_array.syntax_tree b/tests/1-parser/output_standard/testcases_general/4-decl_int_array.syntax_tree
new file mode 100644
index 0000000..5c5ad5a
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/4-decl_int_array.syntax_tree
@@ -0,0 +1,32 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/5-decl_float_array.syntax_tree b/tests/1-parser/output_standard/testcases_general/5-decl_float_array.syntax_tree
new file mode 100644
index 0000000..eb3ce1a
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/5-decl_float_array.syntax_tree
@@ -0,0 +1,32 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* void
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* float
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/6-num_add_int.syntax_tree b/tests/1-parser/output_standard/testcases_general/6-num_add_int.syntax_tree
new file mode 100644
index 0000000..0dc24fd
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/6-num_add_int.syntax_tree
@@ -0,0 +1,58 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1000
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 234
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/7-assign_int_var_local.syntax_tree b/tests/1-parser/output_standard/testcases_general/7-assign_int_var_local.syntax_tree
new file mode 100644
index 0000000..276c6b7
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/7-assign_int_var_local.syntax_tree
@@ -0,0 +1,51 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1234
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/8-assign_int_array_local.syntax_tree b/tests/1-parser/output_standard/testcases_general/8-assign_int_array_local.syntax_tree
new file mode 100644
index 0000000..7e7acd8
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/8-assign_int_array_local.syntax_tree
@@ -0,0 +1,72 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  >--* 10
+|  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 3
+|  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1234
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* [
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 3
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* ]
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard/testcases_general/9-assign_cast.syntax_tree b/tests/1-parser/output_standard/testcases_general/9-assign_cast.syntax_tree
new file mode 100644
index 0000000..69fc176
--- /dev/null
+++ b/tests/1-parser/output_standard/testcases_general/9-assign_cast.syntax_tree
@@ -0,0 +1,93 @@
+>--+ program
+|  >--+ declaration-list
+|  |  >--+ declaration
+|  |  |  >--+ fun-declaration
+|  |  |  |  >--+ type-specifier
+|  |  |  |  |  >--* int
+|  |  |  |  >--* main
+|  |  |  |  >--* (
+|  |  |  |  >--+ params
+|  |  |  |  |  >--* void
+|  |  |  |  >--* )
+|  |  |  |  >--+ compound-stmt
+|  |  |  |  |  >--* {
+|  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  >--+ local-declarations
+|  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ var-declaration
+|  |  |  |  |  |  |  >--+ type-specifier
+|  |  |  |  |  |  |  |  >--* int
+|  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  >--+ statement-list
+|  |  |  |  |  |  |  |  |  >--* epsilon
+|  |  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 1
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ relop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* <
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 3
+|  |  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  |  >--+ expression-stmt
+|  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  |  |  >--* =
+|  |  |  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ integer
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 2
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ float
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* 2.4
+|  |  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  |  >--+ statement
+|  |  |  |  |  |  |  >--+ return-stmt
+|  |  |  |  |  |  |  |  >--* return
+|  |  |  |  |  |  |  |  >--+ expression
+|  |  |  |  |  |  |  |  |  >--+ simple-expression
+|  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  >--+ additive-expression
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* a
+|  |  |  |  |  |  |  |  |  |  |  >--+ addop
+|  |  |  |  |  |  |  |  |  |  |  |  >--* +
+|  |  |  |  |  |  |  |  |  |  |  >--+ term
+|  |  |  |  |  |  |  |  |  |  |  |  >--+ factor
+|  |  |  |  |  |  |  |  |  |  |  |  |  >--+ var
+|  |  |  |  |  |  |  |  |  |  |  |  |  |  >--* b
+|  |  |  |  |  |  |  |  >--* ;
+|  |  |  |  |  >--* }
diff --git a/tests/1-parser/output_standard_ast/easy/FAIL_comment.ast b/tests/1-parser/output_standard_ast/easy/FAIL_comment.ast
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard_ast/easy/FAIL_comment2.ast b/tests/1-parser/output_standard_ast/easy/FAIL_comment2.ast
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard_ast/easy/FAIL_function.ast b/tests/1-parser/output_standard_ast/easy/FAIL_function.ast
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard_ast/easy/FAIL_id.ast b/tests/1-parser/output_standard_ast/easy/FAIL_id.ast
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard_ast/easy/expr.ast b/tests/1-parser/output_standard_ast/easy/expr.ast
new file mode 100644
index 0000000..5cc69d9
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/easy/expr.ast
@@ -0,0 +1,74 @@
+program
+--fun-declaration: main
+----compound-stmt
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------expression-stmt
+--------assign-expression
+----------var: x
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (float): 0
+------expression-stmt
+--------assign-expression
+----------var: x
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (float): 1
+------expression-stmt
+--------assign-expression
+----------var: x
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (float): 0.1
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression: +
+--------------additive-expression
+----------------term
+------------------num (int): 1
+--------------term
+----------------num (int): 1
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression: -
+--------------additive-expression
+----------------term
+------------------var: a
+--------------term
+----------------num (int): 1
+------expression-stmt
+--------assign-expression
+----------var: x
+----------simple-expression
+------------additive-expression
+--------------term: *
+----------------term
+------------------var: x
+----------------num (int): 1
+------expression-stmt
+--------assign-expression
+----------var: x
+----------simple-expression
+------------additive-expression
+--------------term: /
+----------------term
+------------------var: a
+----------------var: x
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 0
diff --git a/tests/1-parser/output_standard_ast/easy/id.ast b/tests/1-parser/output_standard_ast/easy/id.ast
new file mode 100644
index 0000000..b9073b2
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/easy/id.ast
@@ -0,0 +1,6 @@
+program
+--var-declaration: a
+--fun-declaration: f
+----compound-stmt
+--fun-declaration: g
+----compound-stmt
diff --git a/tests/1-parser/output_standard_ast/hard/You_Should_Pass.ast b/tests/1-parser/output_standard_ast/hard/You_Should_Pass.ast
new file mode 100644
index 0000000..1c4f188
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/hard/You_Should_Pass.ast
@@ -0,0 +1,115 @@
+program
+--var-declaration: GVAR
+--var-declaration: NeverEverDeclareLikeThis
+--var-declaration: GARRAY[]
+----num (int): 2333
+--fun-declaration: MyFuncA
+----param: floatNum
+----param: intNum
+----param: voidNums[]
+----compound-stmt
+------var-declaration: IKnowYouAreVoid
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: MyFuncB()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: IKnowYouAreVoid
+--fun-declaration: MyFuncB
+----compound-stmt
+------var-declaration: IAmVoid[]
+--------num (int): 0
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: MyFuncA()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------num (float): 0
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------num (int): 0
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: IAmVoid
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------var-declaration: b
+------var-declaration: c
+------expression-stmt
+--------assign-expression
+----------var: a
+----------assign-expression
+------------var: b
+------------assign-expression
+--------------var: c
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------simple-expression: ==
+----------------------additive-expression
+------------------------term
+--------------------------num (int): 85
+----------------------additive-expression: +
+------------------------additive-expression
+--------------------------term
+----------------------------num (int): 84
+------------------------term
+--------------------------num (float): 0.4
+------selection-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: b
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: GARRAY[]
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------simple-expression
+------------------------additive-expression
+--------------------------term
+----------------------------call: MyFuncB()
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: GARRAY[]
+----------------------assign-expression
+------------------------var: c
+------------------------simple-expression: ==
+--------------------------additive-expression
+----------------------------term: *
+------------------------------term
+--------------------------------num (float): 1
+------------------------------num (float): 0.1
+--------------------------additive-expression
+----------------------------term
+------------------------------num (float): 1.1
+--------selection-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------call: MyFuncC()
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: NotDeclared
+----------compound-stmt
+----------expression-stmt
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (float): 0
diff --git a/tests/1-parser/output_standard_ast/hard/assoc.ast b/tests/1-parser/output_standard_ast/hard/assoc.ast
new file mode 100644
index 0000000..68b893e
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/hard/assoc.ast
@@ -0,0 +1,45 @@
+program
+--fun-declaration: main
+----compound-stmt
+------expression-stmt
+--------assign-expression
+----------var: a
+----------assign-expression
+------------var: b
+------------assign-expression
+--------------var: c
+--------------simple-expression
+----------------additive-expression: +
+------------------additive-expression: +
+--------------------additive-expression: +
+----------------------additive-expression
+------------------------term
+--------------------------num (int): 1
+----------------------term: *
+------------------------term: *
+--------------------------term: /
+----------------------------term
+------------------------------num (int): 1
+----------------------------num (int): 2
+--------------------------num (int): 1
+------------------------simple-expression
+--------------------------additive-expression: -
+----------------------------additive-expression: +
+------------------------------additive-expression: +
+--------------------------------additive-expression
+----------------------------------term
+------------------------------------num (int): 1
+--------------------------------term
+----------------------------------num (int): 1
+------------------------------term
+--------------------------------num (int): 1
+----------------------------term: /
+------------------------------term
+--------------------------------num (int): 1
+------------------------------num (int): 1
+--------------------term
+----------------------num (int): 3
+------------------term: *
+--------------------term
+----------------------num (int): 4
+--------------------num (int): 3
diff --git a/tests/1-parser/output_standard_ast/hard/gcd.ast b/tests/1-parser/output_standard_ast/hard/gcd.ast
new file mode 100644
index 0000000..6bbf706
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/hard/gcd.ast
@@ -0,0 +1,105 @@
+program
+--fun-declaration: gcd
+----param: u
+----param: v
+----compound-stmt
+------selection-stmt
+--------simple-expression: ==
+----------additive-expression
+------------term
+--------------var: v
+----------additive-expression
+------------term
+--------------num (int): 0
+--------return-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: u
+--------return-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------call: gcd()
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: v
+------------------simple-expression
+--------------------additive-expression: -
+----------------------additive-expression
+------------------------term
+--------------------------var: u
+----------------------term: *
+------------------------term: /
+--------------------------term
+----------------------------var: u
+--------------------------var: v
+------------------------var: v
+--fun-declaration: main
+----compound-stmt
+------var-declaration: x
+------var-declaration: y
+------var-declaration: temp
+------expression-stmt
+--------assign-expression
+----------var: x
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 72
+------expression-stmt
+--------assign-expression
+----------var: y
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 18
+------selection-stmt
+--------simple-expression: <
+----------additive-expression
+------------term
+--------------var: x
+----------additive-expression
+------------term
+--------------var: y
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: temp
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: x
+----------expression-stmt
+------------assign-expression
+--------------var: x
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: y
+----------expression-stmt
+------------assign-expression
+--------------var: y
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: temp
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: gcd()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: x
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: y
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 0
diff --git a/tests/1-parser/output_standard_ast/hard/hanoi.ast b/tests/1-parser/output_standard_ast/hard/hanoi.ast
new file mode 100644
index 0000000..2d2d9c9
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/hard/hanoi.ast
@@ -0,0 +1,203 @@
+program
+--fun-declaration: move
+----param: x
+----param: y
+----compound-stmt
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: putint()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: x
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: putch()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------num (int): 32
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: putint()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: y
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: putch()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------num (int): 44
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: putch()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------num (int): 32
+--fun-declaration: hanoi
+----param: n
+----param: one
+----param: two
+----param: three
+----compound-stmt
+------selection-stmt
+--------simple-expression: ==
+----------additive-expression
+------------term
+--------------var: n
+----------additive-expression
+------------term
+--------------num (int): 1
+--------expression-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------call: move()
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: one
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: three
+--------compound-stmt
+----------expression-stmt
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------call: hanoi()
+--------------------simple-expression
+----------------------additive-expression: -
+------------------------additive-expression
+--------------------------term
+----------------------------var: n
+------------------------term
+--------------------------num (int): 1
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: one
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: three
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: two
+----------expression-stmt
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------call: move()
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: one
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: three
+----------expression-stmt
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------call: hanoi()
+--------------------simple-expression
+----------------------additive-expression: -
+------------------------additive-expression
+--------------------------term
+----------------------------var: n
+------------------------term
+--------------------------num (int): 1
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: two
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: one
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: three
+--fun-declaration: main
+----compound-stmt
+------var-declaration: n
+------expression-stmt
+--------assign-expression
+----------var: n
+----------simple-expression
+------------additive-expression
+--------------term
+----------------call: getint()
+------iteration-stmt
+--------simple-expression: >
+----------additive-expression
+------------term
+--------------var: n
+----------additive-expression
+------------term
+--------------num (int): 0
+--------compound-stmt
+----------expression-stmt
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------call: hanoi()
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------call: getint()
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------num (int): 1
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------num (int): 2
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------num (int): 3
+----------expression-stmt
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------call: putch()
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------num (int): 10
+----------expression-stmt
+------------assign-expression
+--------------var: n
+--------------simple-expression
+----------------additive-expression: -
+------------------additive-expression
+--------------------term
+----------------------var: n
+------------------term
+--------------------num (int): 1
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 0
diff --git a/tests/1-parser/output_standard_ast/hard/if.ast b/tests/1-parser/output_standard_ast/hard/if.ast
new file mode 100644
index 0000000..8a9ca95
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/hard/if.ast
@@ -0,0 +1,21 @@
+program
+--fun-declaration: main
+----compound-stmt
+------selection-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 1
+--------compound-stmt
+--------selection-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 2
+----------compound-stmt
+----------compound-stmt
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 0
diff --git a/tests/1-parser/output_standard_ast/hard/selectionsort.ast b/tests/1-parser/output_standard_ast/hard/selectionsort.ast
new file mode 100644
index 0000000..29e7d30
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/hard/selectionsort.ast
@@ -0,0 +1,283 @@
+program
+--var-declaration: x[]
+----num (int): 10
+--fun-declaration: minloc
+----param: a[]
+----param: low
+----param: high
+----compound-stmt
+------var-declaration: i
+------var-declaration: x
+------var-declaration: k
+------expression-stmt
+--------assign-expression
+----------var: k
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: low
+------expression-stmt
+--------assign-expression
+----------var: x
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: a[]
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: low
+------expression-stmt
+--------assign-expression
+----------var: i
+----------simple-expression
+------------additive-expression: +
+--------------additive-expression
+----------------term
+------------------var: low
+--------------term
+----------------num (int): 1
+------iteration-stmt
+--------simple-expression: <
+----------additive-expression
+------------term
+--------------var: i
+----------additive-expression
+------------term
+--------------var: high
+--------compound-stmt
+----------selection-stmt
+------------simple-expression: <
+--------------additive-expression
+----------------term
+------------------var: a[]
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: i
+--------------additive-expression
+----------------term
+------------------var: x
+------------compound-stmt
+--------------expression-stmt
+----------------assign-expression
+------------------var: x
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: a[]
+--------------------------simple-expression
+----------------------------additive-expression
+------------------------------term
+--------------------------------var: i
+--------------expression-stmt
+----------------assign-expression
+------------------var: k
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: i
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: +
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: k
+--fun-declaration: sort
+----param: a[]
+----param: low
+----param: high
+----compound-stmt
+------var-declaration: i
+------var-declaration: k
+------expression-stmt
+--------assign-expression
+----------var: i
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: low
+------iteration-stmt
+--------simple-expression: <
+----------additive-expression
+------------term
+--------------var: i
+----------additive-expression: -
+------------additive-expression
+--------------term
+----------------var: high
+------------term
+--------------num (int): 1
+--------compound-stmt
+----------var-declaration: t
+----------expression-stmt
+------------assign-expression
+--------------var: k
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------call: minloc()
+----------------------simple-expression
+------------------------additive-expression
+--------------------------term
+----------------------------var: a
+----------------------simple-expression
+------------------------additive-expression
+--------------------------term
+----------------------------var: i
+----------------------simple-expression
+------------------------additive-expression
+--------------------------term
+----------------------------var: high
+----------expression-stmt
+------------assign-expression
+--------------var: t
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: a[]
+----------------------simple-expression
+------------------------additive-expression
+--------------------------term
+----------------------------var: k
+----------expression-stmt
+------------assign-expression
+--------------var: a[]
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: k
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: a[]
+----------------------simple-expression
+------------------------additive-expression
+--------------------------term
+----------------------------var: i
+----------expression-stmt
+------------assign-expression
+--------------var: a[]
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: i
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: t
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: +
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
+--fun-declaration: main
+----compound-stmt
+------var-declaration: i
+------expression-stmt
+--------assign-expression
+----------var: i
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------iteration-stmt
+--------simple-expression: <
+----------additive-expression
+------------term
+--------------var: i
+----------additive-expression
+------------term
+--------------num (int): 10
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: x[]
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: i
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------call: input()
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: +
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: sort()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: x
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------num (int): 0
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------num (int): 10
+------expression-stmt
+--------assign-expression
+----------var: i
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------iteration-stmt
+--------simple-expression: <
+----------additive-expression
+------------term
+--------------var: i
+----------additive-expression
+------------term
+--------------num (int): 10
+--------compound-stmt
+----------expression-stmt
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------call: output()
+--------------------simple-expression
+----------------------additive-expression
+------------------------term
+--------------------------var: x[]
+----------------------------simple-expression
+------------------------------additive-expression
+--------------------------------term
+----------------------------------var: i
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: +
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
diff --git a/tests/1-parser/output_standard_ast/normal/FAIL_assign.ast b/tests/1-parser/output_standard_ast/normal/FAIL_assign.ast
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard_ast/normal/FAIL_local-decl.ast b/tests/1-parser/output_standard_ast/normal/FAIL_local-decl.ast
new file mode 100644
index 0000000..e69de29
diff --git a/tests/1-parser/output_standard_ast/normal/array.ast b/tests/1-parser/output_standard_ast/normal/array.ast
new file mode 100644
index 0000000..e152d56
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/normal/array.ast
@@ -0,0 +1,21 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: array[]
+--------num (int): 1
+------expression-stmt
+--------assign-expression
+----------var: array[]
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------num (int): 1
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 0
diff --git a/tests/1-parser/output_standard_ast/normal/func.ast b/tests/1-parser/output_standard_ast/normal/func.ast
new file mode 100644
index 0000000..366d183
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/normal/func.ast
@@ -0,0 +1,17 @@
+program
+--fun-declaration: foo
+----param: a
+----param: b[]
+----compound-stmt
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 1
+--fun-declaration: main
+----compound-stmt
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 0
diff --git a/tests/1-parser/output_standard_ast/normal/if.ast b/tests/1-parser/output_standard_ast/normal/if.ast
new file mode 100644
index 0000000..f2a9c9e
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/normal/if.ast
@@ -0,0 +1,50 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------var-declaration: b
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 1
+------expression-stmt
+--------assign-expression
+----------var: b
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 1
+------selection-stmt
+--------simple-expression: !=
+----------additive-expression
+------------term
+--------------var: a
+----------additive-expression
+------------term
+--------------var: b
+--------compound-stmt
+----------selection-stmt
+------------simple-expression: ==
+--------------additive-expression
+----------------term
+------------------var: a
+--------------additive-expression
+----------------term
+------------------var: b
+------------expression-stmt
+------------compound-stmt
+--------------expression-stmt
+----------------assign-expression
+------------------var: a
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: b
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 0
diff --git a/tests/1-parser/output_standard_ast/normal/local-decl.ast b/tests/1-parser/output_standard_ast/normal/local-decl.ast
new file mode 100644
index 0000000..93f6efa
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/normal/local-decl.ast
@@ -0,0 +1,11 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: i
+------var-declaration: j
+------var-declaration: v
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------num (int): 0
diff --git a/tests/1-parser/output_standard_ast/normal/skip_spaces.ast b/tests/1-parser/output_standard_ast/normal/skip_spaces.ast
new file mode 100644
index 0000000..33fb1d6
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/normal/skip_spaces.ast
@@ -0,0 +1,86 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: arr[]
+--------num (int): 100
+------var-declaration: i
+------var-declaration: sum
+------expression-stmt
+--------assign-expression
+----------var: i
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------expression-stmt
+--------assign-expression
+----------var: sum
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------iteration-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: getint()
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: arr[]
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: i
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------call: getint()
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: +
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
+------iteration-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: i
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: -
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
+----------expression-stmt
+------------assign-expression
+--------------var: sum
+--------------simple-expression
+----------------additive-expression: +
+------------------additive-expression
+--------------------term
+----------------------var: sum
+------------------term
+--------------------var: arr[]
+----------------------simple-expression
+------------------------additive-expression
+--------------------------term
+----------------------------var: i
+------return-stmt
+--------simple-expression
+----------additive-expression: -
+------------additive-expression
+--------------term
+----------------var: sum
+------------term
+--------------num (int): 79
diff --git a/tests/1-parser/output_standard_ast/testcases_general/1-return.ast b/tests/1-parser/output_standard_ast/testcases_general/1-return.ast
new file mode 100644
index 0000000..6894f20
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/1-return.ast
@@ -0,0 +1,4 @@
+program
+--fun-declaration: main
+----compound-stmt
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/10-funcall.ast b/tests/1-parser/output_standard_ast/testcases_general/10-funcall.ast
new file mode 100644
index 0000000..12c7349
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/10-funcall.ast
@@ -0,0 +1,25 @@
+program
+--fun-declaration: test
+----param: a
+----compound-stmt
+------return-stmt: void
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 10
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: test()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: a
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/11-funcall_chain.ast b/tests/1-parser/output_standard_ast/testcases_general/11-funcall_chain.ast
new file mode 100644
index 0000000..806d28a
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/11-funcall_chain.ast
@@ -0,0 +1,43 @@
+program
+--fun-declaration: addone
+----param: a
+----compound-stmt
+------return-stmt
+--------simple-expression
+----------additive-expression: +
+------------additive-expression
+--------------term
+----------------var: a
+------------term
+--------------num (int): 1
+--fun-declaration: main
+----compound-stmt
+------var-declaration: result
+------expression-stmt
+--------assign-expression
+----------var: result
+----------simple-expression
+------------additive-expression
+--------------term
+----------------call: addone()
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------call: addone()
+--------------------------simple-expression
+----------------------------additive-expression
+------------------------------term
+--------------------------------call: addone()
+----------------------------------simple-expression
+------------------------------------additive-expression
+--------------------------------------term
+----------------------------------------call: addone()
+------------------------------------------simple-expression
+--------------------------------------------additive-expression
+----------------------------------------------term
+------------------------------------------------num (int): 1230
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: result
diff --git a/tests/1-parser/output_standard_ast/testcases_general/12-funcall_recursion.ast b/tests/1-parser/output_standard_ast/testcases_general/12-funcall_recursion.ast
new file mode 100644
index 0000000..0c1199a
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/12-funcall_recursion.ast
@@ -0,0 +1,50 @@
+program
+--fun-declaration: factorial
+----param: a
+----compound-stmt
+------selection-stmt
+--------simple-expression: ==
+----------additive-expression
+------------term
+--------------var: a
+----------additive-expression
+------------term
+--------------num (int): 0
+--------return-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 1
+--------return-stmt
+----------simple-expression
+------------additive-expression
+--------------term: *
+----------------term
+------------------var: a
+----------------call: factorial()
+------------------simple-expression
+--------------------additive-expression: -
+----------------------additive-expression
+------------------------term
+--------------------------var: a
+----------------------term
+------------------------num (int): 1
+--fun-declaration: main
+----compound-stmt
+------var-declaration: result
+------expression-stmt
+--------assign-expression
+----------var: result
+----------simple-expression
+------------additive-expression
+--------------term
+----------------call: factorial()
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------num (int): 10
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: result
diff --git a/tests/1-parser/output_standard_ast/testcases_general/13-if_stmt.ast b/tests/1-parser/output_standard_ast/testcases_general/13-if_stmt.ast
new file mode 100644
index 0000000..9ccda43
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/13-if_stmt.ast
@@ -0,0 +1,31 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 2
+------selection-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: a
+--------expression-stmt
+----------assign-expression
+------------var: a
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------num (int): 3
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 4
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/14-while_stmt.ast b/tests/1-parser/output_standard_ast/testcases_general/14-while_stmt.ast
new file mode 100644
index 0000000..0b1c938
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/14-while_stmt.ast
@@ -0,0 +1,28 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: i
+------expression-stmt
+--------assign-expression
+----------var: i
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 10
+------iteration-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: i
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: -
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/15-if_while.ast b/tests/1-parser/output_standard_ast/testcases_general/15-if_while.ast
new file mode 100644
index 0000000..8a4ee2c
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/15-if_while.ast
@@ -0,0 +1,80 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: i
+------var-declaration: a
+------var-declaration: b
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------expression-stmt
+--------assign-expression
+----------var: b
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------expression-stmt
+--------assign-expression
+----------var: i
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 10
+------iteration-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: i
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: -
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
+----------selection-stmt
+------------simple-expression: <
+--------------additive-expression
+----------------term
+------------------var: i
+--------------additive-expression
+----------------term
+------------------num (int): 5
+------------expression-stmt
+--------------assign-expression
+----------------var: a
+----------------simple-expression
+------------------additive-expression: +
+--------------------additive-expression
+----------------------term
+------------------------var: a
+--------------------term
+----------------------var: i
+------------compound-stmt
+--------------expression-stmt
+----------------assign-expression
+------------------var: b
+------------------simple-expression
+--------------------additive-expression: +
+----------------------additive-expression
+------------------------term
+--------------------------var: b
+----------------------term
+------------------------var: i
+------return-stmt
+--------simple-expression
+----------additive-expression: +
+------------additive-expression
+--------------term
+----------------var: a
+------------term
+--------------var: b
diff --git a/tests/1-parser/output_standard_ast/testcases_general/16-if_chain.ast b/tests/1-parser/output_standard_ast/testcases_general/16-if_chain.ast
new file mode 100644
index 0000000..6185e16
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/16-if_chain.ast
@@ -0,0 +1,56 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------var-declaration: b
+------var-declaration: c
+------expression-stmt
+--------assign-expression
+----------var: c
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 0
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 2
+------expression-stmt
+--------assign-expression
+----------var: b
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 1
+------selection-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: b
+--------selection-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: c
+----------expression-stmt
+------------assign-expression
+--------------var: a
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------num (int): 4
+----------expression-stmt
+------------assign-expression
+--------------var: a
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------num (int): 3
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: a
diff --git a/tests/1-parser/output_standard_ast/testcases_general/17-while_chain.ast b/tests/1-parser/output_standard_ast/testcases_general/17-while_chain.ast
new file mode 100644
index 0000000..b979989
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/17-while_chain.ast
@@ -0,0 +1,59 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: i
+------var-declaration: j
+------expression-stmt
+--------assign-expression
+----------var: i
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 10
+------iteration-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: i
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: i
+--------------simple-expression
+----------------additive-expression: -
+------------------additive-expression
+--------------------term
+----------------------var: i
+------------------term
+--------------------num (int): 1
+----------expression-stmt
+------------assign-expression
+--------------var: j
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: i
+----------iteration-stmt
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------var: j
+------------compound-stmt
+--------------expression-stmt
+----------------assign-expression
+------------------var: j
+------------------simple-expression
+--------------------additive-expression: -
+----------------------additive-expression
+------------------------term
+--------------------------var: j
+----------------------term
+------------------------num (int): 1
+------return-stmt
+--------simple-expression
+----------additive-expression: +
+------------additive-expression
+--------------term
+----------------var: i
+------------term
+--------------var: j
diff --git a/tests/1-parser/output_standard_ast/testcases_general/18-global_var.ast b/tests/1-parser/output_standard_ast/testcases_general/18-global_var.ast
new file mode 100644
index 0000000..143fd7b
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/18-global_var.ast
@@ -0,0 +1,16 @@
+program
+--var-declaration: a
+--fun-declaration: main
+----compound-stmt
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 10
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: a
diff --git a/tests/1-parser/output_standard_ast/testcases_general/19-global_local_var.ast b/tests/1-parser/output_standard_ast/testcases_general/19-global_local_var.ast
new file mode 100644
index 0000000..f785d13
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/19-global_local_var.ast
@@ -0,0 +1,32 @@
+program
+--var-declaration: a
+--fun-declaration: GlobalAssign
+----compound-stmt
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 10
+------return-stmt: void
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------expression-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: GlobalAssign()
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 20
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: a
diff --git a/tests/1-parser/output_standard_ast/testcases_general/2-decl_int.ast b/tests/1-parser/output_standard_ast/testcases_general/2-decl_int.ast
new file mode 100644
index 0000000..45376af
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/2-decl_int.ast
@@ -0,0 +1,5 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/20-gcd_array.ast b/tests/1-parser/output_standard_ast/testcases_general/20-gcd_array.ast
new file mode 100644
index 0000000..7ff2f94
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/20-gcd_array.ast
@@ -0,0 +1,151 @@
+program
+--var-declaration: x[]
+----num (int): 1
+--var-declaration: y[]
+----num (int): 1
+--fun-declaration: gcd
+----param: u
+----param: v
+----compound-stmt
+------selection-stmt
+--------simple-expression: ==
+----------additive-expression
+------------term
+--------------var: v
+----------additive-expression
+------------term
+--------------num (int): 0
+--------return-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: u
+--------return-stmt
+----------simple-expression
+------------additive-expression
+--------------term
+----------------call: gcd()
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------var: v
+------------------simple-expression
+--------------------additive-expression: -
+----------------------additive-expression
+------------------------term
+--------------------------var: u
+----------------------term: *
+------------------------term: /
+--------------------------term
+----------------------------var: u
+--------------------------var: v
+------------------------var: v
+--fun-declaration: funArray
+----param: u[]
+----param: v[]
+----compound-stmt
+------var-declaration: a
+------var-declaration: b
+------var-declaration: temp
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: u[]
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------num (int): 0
+------expression-stmt
+--------assign-expression
+----------var: b
+----------simple-expression
+------------additive-expression
+--------------term
+----------------var: v[]
+------------------simple-expression
+--------------------additive-expression
+----------------------term
+------------------------num (int): 0
+------selection-stmt
+--------simple-expression: <
+----------additive-expression
+------------term
+--------------var: a
+----------additive-expression
+------------term
+--------------var: b
+--------compound-stmt
+----------expression-stmt
+------------assign-expression
+--------------var: temp
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: a
+----------expression-stmt
+------------assign-expression
+--------------var: a
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: b
+----------expression-stmt
+------------assign-expression
+--------------var: b
+--------------simple-expression
+----------------additive-expression
+------------------term
+--------------------var: temp
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: gcd()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: a
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: b
+--fun-declaration: main
+----compound-stmt
+------expression-stmt
+--------assign-expression
+----------var: x[]
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------num (int): 0
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 90
+------expression-stmt
+--------assign-expression
+----------var: y[]
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------num (int): 0
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 18
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------call: funArray()
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: x
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------var: y
diff --git a/tests/1-parser/output_standard_ast/testcases_general/21-comment.ast b/tests/1-parser/output_standard_ast/testcases_general/21-comment.ast
new file mode 100644
index 0000000..6894f20
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/21-comment.ast
@@ -0,0 +1,4 @@
+program
+--fun-declaration: main
+----compound-stmt
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/3-decl_float.ast b/tests/1-parser/output_standard_ast/testcases_general/3-decl_float.ast
new file mode 100644
index 0000000..45376af
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/3-decl_float.ast
@@ -0,0 +1,5 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/4-decl_int_array.ast b/tests/1-parser/output_standard_ast/testcases_general/4-decl_int_array.ast
new file mode 100644
index 0000000..89a7603
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/4-decl_int_array.ast
@@ -0,0 +1,6 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a[]
+--------num (int): 10
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/5-decl_float_array.ast b/tests/1-parser/output_standard_ast/testcases_general/5-decl_float_array.ast
new file mode 100644
index 0000000..89a7603
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/5-decl_float_array.ast
@@ -0,0 +1,6 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a[]
+--------num (int): 10
+------return-stmt: void
diff --git a/tests/1-parser/output_standard_ast/testcases_general/6-num_add_int.ast b/tests/1-parser/output_standard_ast/testcases_general/6-num_add_int.ast
new file mode 100644
index 0000000..f00f696
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/6-num_add_int.ast
@@ -0,0 +1,19 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression: +
+--------------additive-expression
+----------------term
+------------------num (int): 1000
+--------------term
+----------------num (int): 234
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: a
diff --git a/tests/1-parser/output_standard_ast/testcases_general/7-assign_int_var_local.ast b/tests/1-parser/output_standard_ast/testcases_general/7-assign_int_var_local.ast
new file mode 100644
index 0000000..5118d87
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/7-assign_int_var_local.ast
@@ -0,0 +1,16 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 1234
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: a
diff --git a/tests/1-parser/output_standard_ast/testcases_general/8-assign_int_array_local.ast b/tests/1-parser/output_standard_ast/testcases_general/8-assign_int_array_local.ast
new file mode 100644
index 0000000..146e3fe
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/8-assign_int_array_local.ast
@@ -0,0 +1,25 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a[]
+--------num (int): 10
+------expression-stmt
+--------assign-expression
+----------var: a[]
+------------simple-expression
+--------------additive-expression
+----------------term
+------------------num (int): 3
+----------simple-expression
+------------additive-expression
+--------------term
+----------------num (int): 1234
+------return-stmt
+--------simple-expression
+----------additive-expression
+------------term
+--------------var: a[]
+----------------simple-expression
+------------------additive-expression
+--------------------term
+----------------------num (int): 3
diff --git a/tests/1-parser/output_standard_ast/testcases_general/9-assign_cast.ast b/tests/1-parser/output_standard_ast/testcases_general/9-assign_cast.ast
new file mode 100644
index 0000000..ae6285d
--- /dev/null
+++ b/tests/1-parser/output_standard_ast/testcases_general/9-assign_cast.ast
@@ -0,0 +1,33 @@
+program
+--fun-declaration: main
+----compound-stmt
+------var-declaration: a
+------var-declaration: b
+------expression-stmt
+--------assign-expression
+----------var: a
+----------simple-expression: <
+------------additive-expression
+--------------term
+----------------num (int): 1
+------------additive-expression
+--------------term
+----------------num (int): 3
+------expression-stmt
+--------assign-expression
+----------var: b
+----------simple-expression
+------------additive-expression: +
+--------------additive-expression
+----------------term
+------------------num (int): 2
+--------------term
+----------------num (float): 2.4
+------return-stmt
+--------simple-expression
+----------additive-expression: +
+------------additive-expression
+--------------term
+----------------var: a
+------------term
+--------------var: b
diff --git a/tests/2-ir-gen/autogen/.gitignore b/tests/2-ir-gen/autogen/.gitignore
new file mode 100644
index 0000000..b524e95
--- /dev/null
+++ b/tests/2-ir-gen/autogen/.gitignore
@@ -0,0 +1 @@
+eval_result
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/decl_float.out b/tests/2-ir-gen/autogen/answers/lv0_1/decl_float.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/decl_float_array.out b/tests/2-ir-gen/autogen/answers/lv0_1/decl_float_array.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/decl_int.out b/tests/2-ir-gen/autogen/answers/lv0_1/decl_int.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/decl_int_array.out b/tests/2-ir-gen/autogen/answers/lv0_1/decl_int_array.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/input.in b/tests/2-ir-gen/autogen/answers/lv0_1/input.in
new file mode 100644
index 0000000..b8626c4
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_1/input.in
@@ -0,0 +1 @@
+4
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/input.out b/tests/2-ir-gen/autogen/answers/lv0_1/input.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/output_float.out b/tests/2-ir-gen/autogen/answers/lv0_1/output_float.out
new file mode 100644
index 0000000..306e815
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_1/output_float.out
@@ -0,0 +1 @@
+123.400002
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/output_int.out b/tests/2-ir-gen/autogen/answers/lv0_1/output_int.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_1/output_int.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv0_1/return.out b/tests/2-ir-gen/autogen/answers/lv0_1/return.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_add_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_add_float.out
new file mode 100644
index 0000000..190a180
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_add_float.out
@@ -0,0 +1 @@
+123
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_add_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_add_int.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_add_int.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_add_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_add_mixed.out
new file mode 100644
index 0000000..b70608f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_add_mixed.out
@@ -0,0 +1 @@
+1023
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_comp1.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_comp1.out
new file mode 100644
index 0000000..2161347
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_comp1.out
@@ -0,0 +1 @@
+-44.720001
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_comp2.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_comp2.out
new file mode 100644
index 0000000..d9ff83f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_comp2.out
@@ -0,0 +1,4 @@
+1
+1
+0
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_div_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_div_float.out
new file mode 100644
index 0000000..48082f7
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_div_float.out
@@ -0,0 +1 @@
+12
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_div_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_div_int.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_div_int.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_div_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_div_mixed.out
new file mode 100644
index 0000000..48082f7
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_div_mixed.out
@@ -0,0 +1 @@
+12
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_float.out
new file mode 100644
index 0000000..7938dcd
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_float.out
@@ -0,0 +1,3 @@
+0
+1
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_int.out
new file mode 100644
index 0000000..7938dcd
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_int.out
@@ -0,0 +1,3 @@
+0
+1
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_mixed.out
new file mode 100644
index 0000000..7938dcd
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_eq_mixed.out
@@ -0,0 +1,3 @@
+0
+1
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_float.out
new file mode 100644
index 0000000..986394f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_float.out
@@ -0,0 +1,3 @@
+0
+1
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_int.out
new file mode 100644
index 0000000..986394f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_int.out
@@ -0,0 +1,3 @@
+0
+1
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_mixed.out
new file mode 100644
index 0000000..986394f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_ge_mixed.out
@@ -0,0 +1,3 @@
+0
+1
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_float.out
new file mode 100644
index 0000000..bb5ee5c
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_float.out
@@ -0,0 +1,3 @@
+0
+0
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_int.out
new file mode 100644
index 0000000..bb5ee5c
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_int.out
@@ -0,0 +1,3 @@
+0
+0
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_mixed.out
new file mode 100644
index 0000000..bb5ee5c
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_gt_mixed.out
@@ -0,0 +1,3 @@
+0
+0
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_le_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_le_float.out
new file mode 100644
index 0000000..2f1465d
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_le_float.out
@@ -0,0 +1,3 @@
+1
+1
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_le_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_le_int.out
new file mode 100644
index 0000000..2f1465d
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_le_int.out
@@ -0,0 +1,3 @@
+1
+1
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_le_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_le_mixed.out
new file mode 100644
index 0000000..2f1465d
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_le_mixed.out
@@ -0,0 +1,3 @@
+1
+1
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_float.out
new file mode 100644
index 0000000..e224937
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_float.out
@@ -0,0 +1,3 @@
+1
+0
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_int.out
new file mode 100644
index 0000000..e224937
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_int.out
@@ -0,0 +1,3 @@
+1
+0
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_mixed.out
new file mode 100644
index 0000000..e224937
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_lt_mixed.out
@@ -0,0 +1,3 @@
+1
+0
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_float.out
new file mode 100644
index 0000000..190a180
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_float.out
@@ -0,0 +1 @@
+123
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_int.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_int.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_mixed.out
new file mode 100644
index 0000000..190a180
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_mul_mixed.out
@@ -0,0 +1 @@
+123
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_float.out
new file mode 100644
index 0000000..16db301
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_float.out
@@ -0,0 +1,3 @@
+1
+0
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_int.out
new file mode 100644
index 0000000..16db301
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_int.out
@@ -0,0 +1,3 @@
+1
+0
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_mixed.out
new file mode 100644
index 0000000..16db301
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_neq_mixed.out
@@ -0,0 +1,3 @@
+1
+0
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_float.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_float.out
new file mode 100644
index 0000000..86a0307
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_float.out
@@ -0,0 +1 @@
+192
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_int.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_int.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_int.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_mixed.out b/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_mixed.out
new file mode 100644
index 0000000..1862496
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv0_2/num_sub_mixed.out
@@ -0,0 +1 @@
+1923
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_cmp.out b/tests/2-ir-gen/autogen/answers/lv1/assign_cmp.out
new file mode 100644
index 0000000..e224937
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_cmp.out
@@ -0,0 +1,3 @@
+1
+0
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_float_array_global.out b/tests/2-ir-gen/autogen/answers/lv1/assign_float_array_global.out
new file mode 100644
index 0000000..16b42d8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_float_array_global.out
@@ -0,0 +1 @@
+1234.000000
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_float_array_local.out b/tests/2-ir-gen/autogen/answers/lv1/assign_float_array_local.out
new file mode 100644
index 0000000..16b42d8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_float_array_local.out
@@ -0,0 +1 @@
+1234.000000
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_float_var_global.out b/tests/2-ir-gen/autogen/answers/lv1/assign_float_var_global.out
new file mode 100644
index 0000000..16b42d8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_float_var_global.out
@@ -0,0 +1 @@
+1234.000000
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_float_var_local.out b/tests/2-ir-gen/autogen/answers/lv1/assign_float_var_local.out
new file mode 100644
index 0000000..16b42d8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_float_var_local.out
@@ -0,0 +1 @@
+1234.000000
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_int_array_global.out b/tests/2-ir-gen/autogen/answers/lv1/assign_int_array_global.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_int_array_global.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_int_array_local.out b/tests/2-ir-gen/autogen/answers/lv1/assign_int_array_local.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_int_array_local.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_int_var_global.out b/tests/2-ir-gen/autogen/answers/lv1/assign_int_var_global.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_int_var_global.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv1/assign_int_var_local.out b/tests/2-ir-gen/autogen/answers/lv1/assign_int_var_local.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/assign_int_var_local.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv1/idx_float.out b/tests/2-ir-gen/autogen/answers/lv1/idx_float.out
new file mode 100644
index 0000000..d7b1c44
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/idx_float.out
@@ -0,0 +1 @@
+1024
diff --git a/tests/2-ir-gen/autogen/answers/lv1/innout.in b/tests/2-ir-gen/autogen/answers/lv1/innout.in
new file mode 100644
index 0000000..ec63514
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/innout.in
@@ -0,0 +1 @@
+9
diff --git a/tests/2-ir-gen/autogen/answers/lv1/innout.out b/tests/2-ir-gen/autogen/answers/lv1/innout.out
new file mode 100644
index 0000000..ec63514
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/innout.out
@@ -0,0 +1 @@
+9
diff --git a/tests/2-ir-gen/autogen/answers/lv1/iteration1.out b/tests/2-ir-gen/autogen/answers/lv1/iteration1.out
new file mode 100644
index 0000000..f4c0c86
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/iteration1.out
@@ -0,0 +1,10 @@
+10
+9
+8
+7
+6
+5
+4
+3
+2
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv1/iteration2.out b/tests/2-ir-gen/autogen/answers/lv1/iteration2.out
new file mode 100644
index 0000000..f4c0c86
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/iteration2.out
@@ -0,0 +1,10 @@
+10
+9
+8
+7
+6
+5
+4
+3
+2
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv1/negidx_float.out b/tests/2-ir-gen/autogen/answers/lv1/negidx_float.out
new file mode 100644
index 0000000..d012265
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/negidx_float.out
@@ -0,0 +1 @@
+negative index exception
diff --git a/tests/2-ir-gen/autogen/answers/lv1/negidx_floatfuncall.out b/tests/2-ir-gen/autogen/answers/lv1/negidx_floatfuncall.out
new file mode 100644
index 0000000..d012265
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/negidx_floatfuncall.out
@@ -0,0 +1 @@
+negative index exception
diff --git a/tests/2-ir-gen/autogen/answers/lv1/negidx_int.out b/tests/2-ir-gen/autogen/answers/lv1/negidx_int.out
new file mode 100644
index 0000000..d012265
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/negidx_int.out
@@ -0,0 +1 @@
+negative index exception
diff --git a/tests/2-ir-gen/autogen/answers/lv1/negidx_intfuncall.out b/tests/2-ir-gen/autogen/answers/lv1/negidx_intfuncall.out
new file mode 100644
index 0000000..d012265
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/negidx_intfuncall.out
@@ -0,0 +1 @@
+negative index exception
diff --git a/tests/2-ir-gen/autogen/answers/lv1/negidx_voidfuncall.out b/tests/2-ir-gen/autogen/answers/lv1/negidx_voidfuncall.out
new file mode 100644
index 0000000..d012265
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/negidx_voidfuncall.out
@@ -0,0 +1 @@
+negative index exception
diff --git a/tests/2-ir-gen/autogen/answers/lv1/scope.out b/tests/2-ir-gen/autogen/answers/lv1/scope.out
new file mode 100644
index 0000000..1089b4f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/scope.out
@@ -0,0 +1,3 @@
+3
+11
+3
diff --git a/tests/2-ir-gen/autogen/answers/lv1/selection1.out b/tests/2-ir-gen/autogen/answers/lv1/selection1.out
new file mode 100644
index 0000000..be6d407
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/selection1.out
@@ -0,0 +1,2 @@
+42
+24
diff --git a/tests/2-ir-gen/autogen/answers/lv1/selection2.out b/tests/2-ir-gen/autogen/answers/lv1/selection2.out
new file mode 100644
index 0000000..be6d407
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/selection2.out
@@ -0,0 +1,2 @@
+42
+24
diff --git a/tests/2-ir-gen/autogen/answers/lv1/selection3.out b/tests/2-ir-gen/autogen/answers/lv1/selection3.out
new file mode 100644
index 0000000..b34401c
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/selection3.out
@@ -0,0 +1,3 @@
+42
+24
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv1/transfer_float_to_int.out b/tests/2-ir-gen/autogen/answers/lv1/transfer_float_to_int.out
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/transfer_float_to_int.out
@@ -0,0 +1 @@
+1
diff --git a/tests/2-ir-gen/autogen/answers/lv1/transfer_int_to_float.out b/tests/2-ir-gen/autogen/answers/lv1/transfer_int_to_float.out
new file mode 100644
index 0000000..961b372
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv1/transfer_int_to_float.out
@@ -0,0 +1 @@
+1.000000
diff --git a/tests/2-ir-gen/autogen/answers/lv2/assign_chain.out b/tests/2-ir-gen/autogen/answers/lv2/assign_chain.out
new file mode 100644
index 0000000..1f242fa
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/assign_chain.out
@@ -0,0 +1,3 @@
+3
+3
+3
diff --git a/tests/2-ir-gen/autogen/answers/lv2/funcall_array.out b/tests/2-ir-gen/autogen/answers/lv2/funcall_array.out
new file mode 100644
index 0000000..f599e28
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/funcall_array.out
@@ -0,0 +1 @@
+10
diff --git a/tests/2-ir-gen/autogen/answers/lv2/funcall_array_array.out b/tests/2-ir-gen/autogen/answers/lv2/funcall_array_array.out
new file mode 100644
index 0000000..f4b3c38
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/funcall_array_array.out
@@ -0,0 +1,2 @@
+1024
+1024
diff --git a/tests/2-ir-gen/autogen/answers/lv2/funcall_chain.out b/tests/2-ir-gen/autogen/answers/lv2/funcall_chain.out
new file mode 100644
index 0000000..81c545e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/funcall_chain.out
@@ -0,0 +1 @@
+1234
diff --git a/tests/2-ir-gen/autogen/answers/lv2/funcall_float_array.out b/tests/2-ir-gen/autogen/answers/lv2/funcall_float_array.out
new file mode 100644
index 0000000..00750ed
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/funcall_float_array.out
@@ -0,0 +1 @@
+3
diff --git a/tests/2-ir-gen/autogen/answers/lv2/funcall_int_array.out b/tests/2-ir-gen/autogen/answers/lv2/funcall_int_array.out
new file mode 100644
index 0000000..f599e28
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/funcall_int_array.out
@@ -0,0 +1 @@
+10
diff --git a/tests/2-ir-gen/autogen/answers/lv2/funcall_type_mismatch1.out b/tests/2-ir-gen/autogen/answers/lv2/funcall_type_mismatch1.out
new file mode 100644
index 0000000..f599e28
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/funcall_type_mismatch1.out
@@ -0,0 +1 @@
+10
diff --git a/tests/2-ir-gen/autogen/answers/lv2/funcall_type_mismatch2.out b/tests/2-ir-gen/autogen/answers/lv2/funcall_type_mismatch2.out
new file mode 100644
index 0000000..9406425
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/funcall_type_mismatch2.out
@@ -0,0 +1 @@
+4.000000
diff --git a/tests/2-ir-gen/autogen/answers/lv2/funcall_var.out b/tests/2-ir-gen/autogen/answers/lv2/funcall_var.out
new file mode 100644
index 0000000..f599e28
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/funcall_var.out
@@ -0,0 +1 @@
+10
diff --git a/tests/2-ir-gen/autogen/answers/lv2/return_in_middle1.out b/tests/2-ir-gen/autogen/answers/lv2/return_in_middle1.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/return_in_middle1.out
@@ -0,0 +1 @@
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv2/return_in_middle2.out b/tests/2-ir-gen/autogen/answers/lv2/return_in_middle2.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/return_in_middle2.out
@@ -0,0 +1 @@
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv2/return_type_mismatch1.out b/tests/2-ir-gen/autogen/answers/lv2/return_type_mismatch1.out
new file mode 100644
index 0000000..0c56bea
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/return_type_mismatch1.out
@@ -0,0 +1 @@
+233
diff --git a/tests/2-ir-gen/autogen/answers/lv2/return_type_mismatch2.out b/tests/2-ir-gen/autogen/answers/lv2/return_type_mismatch2.out
new file mode 100644
index 0000000..273675e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv2/return_type_mismatch2.out
@@ -0,0 +1 @@
+7.000000
diff --git a/tests/2-ir-gen/autogen/answers/lv3/complex1.out b/tests/2-ir-gen/autogen/answers/lv3/complex1.out
new file mode 100644
index 0000000..b652fb0
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv3/complex1.out
@@ -0,0 +1,800 @@
+3
+1
+4
+1
+5
+9
+2
+6
+5
+3
+5
+8
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diff --git a/tests/2-ir-gen/autogen/answers/lv3/complex2.in b/tests/2-ir-gen/autogen/answers/lv3/complex2.in
new file mode 100644
index 0000000..ba6e481
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv3/complex2.in
@@ -0,0 +1,10 @@
+9
+8
+7
+6
+5
+4
+3
+2
+1
+0
diff --git a/tests/2-ir-gen/autogen/answers/lv3/complex2.out b/tests/2-ir-gen/autogen/answers/lv3/complex2.out
new file mode 100644
index 0000000..8b1acc1
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv3/complex2.out
@@ -0,0 +1,10 @@
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
diff --git a/tests/2-ir-gen/autogen/answers/lv3/complex3.in b/tests/2-ir-gen/autogen/answers/lv3/complex3.in
new file mode 100644
index 0000000..50a3a30
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv3/complex3.in
@@ -0,0 +1,2 @@
+78
+117
diff --git a/tests/2-ir-gen/autogen/answers/lv3/complex3.out b/tests/2-ir-gen/autogen/answers/lv3/complex3.out
new file mode 100644
index 0000000..a272009
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv3/complex3.out
@@ -0,0 +1 @@
+39
diff --git a/tests/2-ir-gen/autogen/answers/lv3/complex4.out b/tests/2-ir-gen/autogen/answers/lv3/complex4.out
new file mode 100644
index 0000000..b8136f4
--- /dev/null
+++ b/tests/2-ir-gen/autogen/answers/lv3/complex4.out
@@ -0,0 +1,3 @@
+1.000000
+-0.200000
+0.400000
diff --git a/tests/2-ir-gen/autogen/eval_lab2.py b/tests/2-ir-gen/autogen/eval_lab2.py
new file mode 100755
index 0000000..e25399f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/eval_lab2.py
@@ -0,0 +1,180 @@
+#!/usr/bin/env python3
+import subprocess
+# 17
+lv0_1 = {
+    "return": (3, False),
+    "decl_int": (2, False),
+    "decl_float": (2, False),
+    "decl_int_array": (2, False),
+    "decl_float_array": (2, False),
+    "input": (2, True),
+    "output_float": (2, False),
+    "output_int": (2, False),
+}
+
+# 18
+lv0_2 = {
+    "num_add_int": (0.5, False),
+    "num_sub_int": (0.5, False),
+    "num_mul_int": (0.5, False),
+    "num_div_int": (0.5, False),
+    "num_add_float": (0.5, False),
+    "num_sub_float": (0.5, False),
+    "num_mul_float": (0.5, False),
+    "num_div_float": (0.5, False),
+    "num_add_mixed": (0.5, False),
+    "num_sub_mixed": (0.5, False),
+    "num_mul_mixed": (0.5, False),
+    "num_div_mixed": (0.5, False),
+    "num_comp1": (1.5, False),
+    "num_le_int": (0.5, False),
+    "num_lt_int": (0.5, False),
+    "num_ge_int": (0.5, False),
+    "num_gt_int": (0.5, False),
+    "num_eq_int": (0.5, False),
+    "num_neq_int": (0.5, False),
+    "num_le_float": (0.5, False),
+    "num_lt_float": (0.5, False),
+    "num_ge_float": (0.5, False),
+    "num_gt_float": (0.5, False),
+    "num_eq_float": (0.5, False),
+    "num_neq_float": (0.5, False),
+    "num_le_mixed": (0.5, False),
+    "num_lt_mixed": (0.5, False),
+    "num_ge_mixed": (0.5, False),
+    "num_gt_mixed": (0.5, False),
+    "num_eq_mixed": (0.5, False),
+    "num_neq_mixed": (0.5, False),
+    "num_comp2": (1.5, False),
+}
+
+# 31
+lv1 = {
+    "assign_int_var_local": (1, False),
+    "assign_int_array_local": (2, False),
+    "assign_int_var_global": (1, False),
+    "assign_int_array_global": (2, False),
+    "assign_float_var_local": (1, False),
+    "assign_float_array_local": (2, False),
+    "assign_float_var_global": (1, False),
+    "assign_float_array_global": (2, False),
+    "assign_cmp": (1, False),
+    "innout": (1, True),
+    "idx_float": (1, False),
+    "negidx_int": (1, False),
+    "negidx_float": (1, False),
+    "negidx_intfuncall": (1, False),
+    "negidx_floatfuncall": (1, False),
+    "negidx_voidfuncall": (1, False),
+    "selection1": (1.5, False),
+    "selection2": (1.5, False),
+    "selection3": (1.5, False),
+    "iteration1": (1.5, False),
+    "iteration2": (1.5, False),
+    "scope": (1.5, False),
+    "transfer_float_to_int": (1, False),
+    "transfer_int_to_float": (1, False),
+}
+
+# 23
+lv2 = {
+    "funcall_chain": (2, False),
+    "assign_chain": (2, False),
+    "funcall_var": (2, False),
+    "funcall_int_array": (2, False),
+    "funcall_float_array": (2, False),
+    "funcall_array_array": (2, False),
+    "return_in_middle1": (2, False),
+    "return_in_middle2": (2, False),
+    "funcall_type_mismatch1": (2, False),
+    "funcall_type_mismatch2": (2, False),
+    "return_type_mismatch1": (1.5, False),
+    "return_type_mismatch2": (1.5, False),
+}
+
+# 11
+lv3 = {
+    "complex1": (3, False),
+    "complex2": (3, True),
+    "complex3": (2, True),
+    "complex4": (3, False),
+}
+
+suite = [
+    ("lv0_1", lv0_1, 0),
+    ("lv0_2", lv0_2, 0),
+    ("lv1", lv1, 0),
+    ("lv2", lv2, 0),
+    ("lv3", lv3, 0)
+]
+
+
+def eval():
+    f = open("eval_result", 'w')
+    EXE_PATH = "../../../build/cminusfc"
+    TEST_BASE_PATH = "./testcases/"
+    ANSWER_BASE_PATH = "./answers/"
+    total_points = 0
+    for level in suite:
+        lv_points = 0
+        has_bonus = True
+        level_name = level[0]
+        bonus = level[2]
+        cases = level[1]
+        f.write('===========%s START========\n' % level_name)
+        for case in cases:
+            f.write('%s:' % case)
+            TEST_PATH = TEST_BASE_PATH + level_name + "/" + case
+            ANSWER_PATH = ANSWER_BASE_PATH + level_name + "/" + case
+            score = cases[case][0]
+            need_input = cases[case][1]
+
+            COMMAND = [TEST_PATH]
+
+            try:
+                result = subprocess.run([EXE_PATH, "-o", TEST_PATH + ".ll", "-emit-llvm",
+                                        TEST_PATH + ".cminus"], stderr=subprocess.PIPE, timeout=1)
+            except Exception as _:
+                f.write('\tFail\n')
+                continue
+
+            if result.returncode == 0:
+                subprocess.run(["clang", "-O0", "-w", "-no-pie", TEST_PATH +
+                               ".ll", "-o", TEST_PATH, "-L", "../../../build", "-lcminus_io"])
+                input_option = None
+                if need_input:
+                    with open(ANSWER_PATH + ".in", "rb") as fin:
+                        input_option = fin.read()
+
+                try:
+                    result = subprocess.run(
+                        COMMAND, input=input_option, stdout=subprocess.PIPE, stderr=subprocess.PIPE, timeout=1)
+                    with open(ANSWER_PATH + ".out", "rb") as fout:
+                        if result.stdout == fout.read():
+                            f.write('\tSuccess\n')
+                            lv_points += score
+                        else:
+                            f.write('\tFail\n')
+                            has_bonus = False
+                except Exception as _:
+                    f.write('\tFail\n')
+                    has_bonus = False
+                finally:
+                    subprocess.call(
+                        ["rm", "-rf", TEST_PATH, TEST_PATH + ".o", TEST_PATH + ".ll"])
+
+            else:
+                f.write('\tFail\n')
+                has_bonus = False
+
+        if has_bonus:
+            lv_points += bonus
+
+        total_points += lv_points
+        f.write('points of %s is: %d\n' % (level_name, lv_points))
+        f.write('===========%s END========\n\n' % level_name)
+    f.write('total points: %d\n' % total_points)
+
+
+if __name__ == "__main__":
+    eval()
diff --git a/tests/2-ir-gen/autogen/eval_lab2.sh b/tests/2-ir-gen/autogen/eval_lab2.sh
new file mode 100755
index 0000000..20fefb1
--- /dev/null
+++ b/tests/2-ir-gen/autogen/eval_lab2.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+python3 eval_lab2.py
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_1/decl_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_1/decl_float.cminus
new file mode 100644
index 0000000..61949df
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_1/decl_float.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    float a;
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_1/decl_float_array.cminus b/tests/2-ir-gen/autogen/testcases/lv0_1/decl_float_array.cminus
new file mode 100644
index 0000000..bd28952
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_1/decl_float_array.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    float a[10];
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_1/decl_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_1/decl_int.cminus
new file mode 100644
index 0000000..b4f1e34
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_1/decl_int.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    int a;
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_1/decl_int_array.cminus b/tests/2-ir-gen/autogen/testcases/lv0_1/decl_int_array.cminus
new file mode 100644
index 0000000..249926a
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_1/decl_int_array.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    int a[10];
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_1/input.cminus b/tests/2-ir-gen/autogen/testcases/lv0_1/input.cminus
new file mode 100644
index 0000000..6c1ef31
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_1/input.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    input();
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_1/output_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_1/output_float.cminus
new file mode 100644
index 0000000..deef7f7
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_1/output_float.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    outputFloat(123.4);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_1/output_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_1/output_int.cminus
new file mode 100644
index 0000000..c135600
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_1/output_int.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(1234);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_1/return.cminus b/tests/2-ir-gen/autogen/testcases/lv0_1/return.cminus
new file mode 100644
index 0000000..464e22a
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_1/return.cminus
@@ -0,0 +1 @@
+void main(void) { return; }
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_float.cminus
new file mode 100644
index 0000000..75d9c3e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_float.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(100.0 + 23.4);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_int.cminus
new file mode 100644
index 0000000..026d14d
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_int.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(1000 + 234);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_mixed.cminus
new file mode 100644
index 0000000..e6f1aa5
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_add_mixed.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(1000 + 23.4);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_comp1.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_comp1.cminus
new file mode 100644
index 0000000..9cecb1e
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_comp1.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    outputFloat(9 + 1.2 / (2 * 2 + 5 - 6) * 3.2 - 55);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_comp2.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_comp2.cminus
new file mode 100644
index 0000000..4aa5fbb
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_comp2.cminus
@@ -0,0 +1,7 @@
+void main(void) {
+    output((1 > 2.) < 3);
+    output((1 > 2) < ((3 == 4) >= 0));
+    output(((3 == 4.) >= 0) <= (4 != 4));
+    output(((1 > 2) < ((3 == 4) >= 0)) <= (4. != 4));
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_float.cminus
new file mode 100644
index 0000000..c1c10b4
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_float.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(24.68 / 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_int.cminus
new file mode 100644
index 0000000..933a0d8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_int.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(2468 / 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_mixed.cminus
new file mode 100644
index 0000000..19eba76
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_div_mixed.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(24.68 / 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_float.cminus
new file mode 100644
index 0000000..68551d2
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_float.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. == 2.);
+    output(2. == 2.);
+    output(3. == 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_int.cminus
new file mode 100644
index 0000000..2a0fceb
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_int.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1 == 2);
+    output(2 == 2);
+    output(3 == 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_mixed.cminus
new file mode 100644
index 0000000..10a4f12
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_eq_mixed.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. == 2);
+    output(2. == 2);
+    output(3 == 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_float.cminus
new file mode 100644
index 0000000..e2eeeea
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_float.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. >= 2.);
+    output(2. >= 2.);
+    output(3. >= 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_int.cminus
new file mode 100644
index 0000000..2536fc8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_int.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1 >= 2);
+    output(2 >= 2);
+    output(3 >= 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_mixed.cminus
new file mode 100644
index 0000000..f5a2eba
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_ge_mixed.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. >= 2);
+    output(2. >= 2);
+    output(3 >= 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_float.cminus
new file mode 100644
index 0000000..b272fc2
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_float.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. > 2.);
+    output(2. > 2.);
+    output(3. > 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_int.cminus
new file mode 100644
index 0000000..e4b6009
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_int.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1 > 2);
+    output(2 > 2);
+    output(3 > 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_mixed.cminus
new file mode 100644
index 0000000..c3e6d7c
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_gt_mixed.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. > 2);
+    output(2. > 2);
+    output(3 > 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_float.cminus
new file mode 100644
index 0000000..905440c
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_float.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. <= 2.);
+    output(2. <= 2.);
+    output(3. <= 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_int.cminus
new file mode 100644
index 0000000..320bd5b
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_int.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1 <= 2);
+    output(2 <= 2);
+    output(3 <= 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_mixed.cminus
new file mode 100644
index 0000000..f29aecf
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_le_mixed.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. <= 2);
+    output(2. <= 2);
+    output(3 <= 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_float.cminus
new file mode 100644
index 0000000..a3ccf1b
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_float.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. < 2.);
+    output(2. < 2.);
+    output(3. < 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_int.cminus
new file mode 100644
index 0000000..d960064
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_int.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1 < 2);
+    output(2 < 2);
+    output(3 < 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_mixed.cminus
new file mode 100644
index 0000000..be28482
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_lt_mixed.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. < 2);
+    output(2 < 2.);
+    output(3. < 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_float.cminus
new file mode 100644
index 0000000..124e3b1
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_float.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(2. * 61.7);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_int.cminus
new file mode 100644
index 0000000..b6e454a
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_int.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(2 * 617);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_mixed.cminus
new file mode 100644
index 0000000..6195967
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_mul_mixed.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(2 * 61.7);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_float.cminus
new file mode 100644
index 0000000..1c0f9fc
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_float.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. != 2.);
+    output(2. != 2.);
+    output(3. != 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_int.cminus
new file mode 100644
index 0000000..78020d8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_int.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1 != 2);
+    output(2 != 2);
+    output(3 != 2);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_mixed.cminus
new file mode 100644
index 0000000..8076ae8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_neq_mixed.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    output(1. != 2);
+    output(2 != 2.);
+    output(3 != 2.);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_float.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_float.cminus
new file mode 100644
index 0000000..2f4f89a
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_float.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(200.0 - 7.66);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_int.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_int.cminus
new file mode 100644
index 0000000..24ef9fc
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_int.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(2000 - 766);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_mixed.cminus b/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_mixed.cminus
new file mode 100644
index 0000000..1ca099f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv0_2/num_sub_mixed.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    output(2000 - 76.6);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_cmp.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_cmp.cminus
new file mode 100644
index 0000000..0bc93cf
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_cmp.cminus
@@ -0,0 +1,12 @@
+void main(void) {
+    int a;
+    int b;
+    int c;
+    a = 1 < 3;
+    b = 2 == 4;
+    c = 3 > 5;
+    output(a);
+    output(b);
+    output(c);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_float_array_global.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_float_array_global.cminus
new file mode 100644
index 0000000..bd094b1
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_float_array_global.cminus
@@ -0,0 +1,6 @@
+float b[10];
+void main(void) {
+    b[3] = 1234.0;
+    outputFloat(b[3]);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_float_array_local.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_float_array_local.cminus
new file mode 100644
index 0000000..bbccb00
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_float_array_local.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    float b[10];
+    b[3] = 1234.0;
+    outputFloat(b[3]);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_float_var_global.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_float_var_global.cminus
new file mode 100644
index 0000000..3890958
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_float_var_global.cminus
@@ -0,0 +1,6 @@
+float b;
+void main(void) {
+    b = 1234.0;
+    outputFloat(b);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_float_var_local.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_float_var_local.cminus
new file mode 100644
index 0000000..fa08600
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_float_var_local.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    float b;
+    b = 1234.0;
+    outputFloat(b);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_int_array_global.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_int_array_global.cminus
new file mode 100644
index 0000000..6251252
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_int_array_global.cminus
@@ -0,0 +1,6 @@
+int a[10];
+void main(void) {
+    a[3] = 1234;
+    output(a[3]);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_int_array_local.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_int_array_local.cminus
new file mode 100644
index 0000000..283e0d3
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_int_array_local.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    int a[10];
+    a[3] = 1234;
+    output(a[3]);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_int_var_global.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_int_var_global.cminus
new file mode 100644
index 0000000..ecaa8ad
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_int_var_global.cminus
@@ -0,0 +1,6 @@
+int a;
+void main(void) {
+    a = 1234;
+    output(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/assign_int_var_local.cminus b/tests/2-ir-gen/autogen/testcases/lv1/assign_int_var_local.cminus
new file mode 100644
index 0000000..0b688c8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/assign_int_var_local.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    int a;
+    a = 1234;
+    output(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/idx_float.cminus b/tests/2-ir-gen/autogen/testcases/lv1/idx_float.cminus
new file mode 100644
index 0000000..f214eac
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/idx_float.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    int a[10];
+    a[0] = 1024;
+    output(a[0.1]);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/innout.cminus b/tests/2-ir-gen/autogen/testcases/lv1/innout.cminus
new file mode 100644
index 0000000..eaabfe9
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/innout.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    int a;
+    a = input();
+    output(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/iteration1.cminus b/tests/2-ir-gen/autogen/testcases/lv1/iteration1.cminus
new file mode 100644
index 0000000..379f27f
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/iteration1.cminus
@@ -0,0 +1,9 @@
+void main(void) {
+    int i;
+    i = 10;
+    while (i) {
+        output(i);
+        i = i - 1;
+    }
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/iteration2.cminus b/tests/2-ir-gen/autogen/testcases/lv1/iteration2.cminus
new file mode 100644
index 0000000..ec17bb3
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/iteration2.cminus
@@ -0,0 +1,9 @@
+void main(void) {
+    int i;
+    i = 10;
+    while (i > 0) {
+        output(i);
+        i = i - 1;
+    }
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/negidx_float.cminus b/tests/2-ir-gen/autogen/testcases/lv1/negidx_float.cminus
new file mode 100644
index 0000000..94558ab
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/negidx_float.cminus
@@ -0,0 +1,5 @@
+void main(void) {
+    int a[10];
+    a[2. - 3];
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/negidx_floatfuncall.cminus b/tests/2-ir-gen/autogen/testcases/lv1/negidx_floatfuncall.cminus
new file mode 100644
index 0000000..24c27f7
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/negidx_floatfuncall.cminus
@@ -0,0 +1,9 @@
+float test(void) {
+    int a[10];
+    a[2 - 3];
+    return 2.;
+}
+void main(void) {
+    test();
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/negidx_int.cminus b/tests/2-ir-gen/autogen/testcases/lv1/negidx_int.cminus
new file mode 100644
index 0000000..509baed
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/negidx_int.cminus
@@ -0,0 +1,5 @@
+void main(void) {
+    int a[10];
+    a[2 - 3];
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/negidx_intfuncall.cminus b/tests/2-ir-gen/autogen/testcases/lv1/negidx_intfuncall.cminus
new file mode 100644
index 0000000..508a6be
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/negidx_intfuncall.cminus
@@ -0,0 +1,9 @@
+int test(void) {
+    int a[10];
+    a[2 - 3];
+    return 2;
+}
+void main(void) {
+    test();
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/negidx_voidfuncall.cminus b/tests/2-ir-gen/autogen/testcases/lv1/negidx_voidfuncall.cminus
new file mode 100644
index 0000000..f1e1bec
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/negidx_voidfuncall.cminus
@@ -0,0 +1,9 @@
+void test(void) {
+    int a[10];
+    a[2 - 3];
+    return;
+}
+void main(void) {
+    test();
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/scope.cminus b/tests/2-ir-gen/autogen/testcases/lv1/scope.cminus
new file mode 100644
index 0000000..deecaea
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/scope.cminus
@@ -0,0 +1,12 @@
+void main(void) {
+    int a;
+    a = 3;
+    output(a);
+    {
+        int a;
+        a = 11;
+        output(a);
+    }
+    output(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/selection1.cminus b/tests/2-ir-gen/autogen/testcases/lv1/selection1.cminus
new file mode 100644
index 0000000..57be8c8
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/selection1.cminus
@@ -0,0 +1,8 @@
+void main(void) {
+    int a;
+    a = 2;
+    if (a)
+        output(42);
+    output(24);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/selection2.cminus b/tests/2-ir-gen/autogen/testcases/lv1/selection2.cminus
new file mode 100644
index 0000000..065d863
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/selection2.cminus
@@ -0,0 +1,9 @@
+void main(void) {
+    if (2 > 1)
+        output(42);
+    output(24);
+    if (1 > 2) {
+        output(1234);
+    }
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/selection3.cminus b/tests/2-ir-gen/autogen/testcases/lv1/selection3.cminus
new file mode 100644
index 0000000..73ad4de
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/selection3.cminus
@@ -0,0 +1,15 @@
+void main(void) {
+    if (2 > 1) {
+        output(42);
+    } else
+        output(1234);
+
+    output(24);
+
+    if (2 < 1)
+        output(42);
+    else {
+        output(1234);
+    }
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/transfer_float_to_int.cminus b/tests/2-ir-gen/autogen/testcases/lv1/transfer_float_to_int.cminus
new file mode 100644
index 0000000..99096fb
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/transfer_float_to_int.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    int a;
+    a = 1.0;
+    output(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv1/transfer_int_to_float.cminus b/tests/2-ir-gen/autogen/testcases/lv1/transfer_int_to_float.cminus
new file mode 100644
index 0000000..ae281e7
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv1/transfer_int_to_float.cminus
@@ -0,0 +1,6 @@
+void main(void) {
+    float a;
+    a = 1;
+    outputFloat(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/assign_chain.cminus b/tests/2-ir-gen/autogen/testcases/lv2/assign_chain.cminus
new file mode 100644
index 0000000..8bac001
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/assign_chain.cminus
@@ -0,0 +1,10 @@
+void main(void) {
+    int a;
+    int b;
+    int c;
+    a = b = c = 3;
+    output(a);
+    output(b);
+    output(c);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/funcall_array_array.cminus b/tests/2-ir-gen/autogen/testcases/lv2/funcall_array_array.cminus
new file mode 100644
index 0000000..8676065
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/funcall_array_array.cminus
@@ -0,0 +1,17 @@
+void g(int b[]) {
+    output(b[3]);
+    return;
+}
+
+void f(int c[]) {
+    output(c[3]);
+    g(c);
+    return;
+}
+
+void main(void) {
+    int a[10];
+    a[3] = 1024;
+    f(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/funcall_chain.cminus b/tests/2-ir-gen/autogen/testcases/lv2/funcall_chain.cminus
new file mode 100644
index 0000000..1253e64
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/funcall_chain.cminus
@@ -0,0 +1,7 @@
+int addone(int a) { return a + 1; }
+void main(void) {
+    int result;
+    result = addone(addone(addone(addone(1230))));
+    output(result);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/funcall_float_array.cminus b/tests/2-ir-gen/autogen/testcases/lv2/funcall_float_array.cminus
new file mode 100644
index 0000000..ea1c524
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/funcall_float_array.cminus
@@ -0,0 +1,11 @@
+void test(float a[]) {
+    output(a[3]);
+    return;
+}
+
+void main(void) {
+    float a[10];
+    a[3] = 3.14;
+    test(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/funcall_int_array.cminus b/tests/2-ir-gen/autogen/testcases/lv2/funcall_int_array.cminus
new file mode 100644
index 0000000..1772fad
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/funcall_int_array.cminus
@@ -0,0 +1,11 @@
+void test(int a[]) {
+    output(a[3]);
+    return;
+}
+
+void main(void) {
+    int a[10];
+    a[3] = 10;
+    test(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/funcall_type_mismatch1.cminus b/tests/2-ir-gen/autogen/testcases/lv2/funcall_type_mismatch1.cminus
new file mode 100644
index 0000000..68010f2
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/funcall_type_mismatch1.cminus
@@ -0,0 +1,11 @@
+void f(int a) {
+    output(a);
+    return;
+}
+
+void main(void) {
+    float a;
+    a = 10;
+    f(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/funcall_type_mismatch2.cminus b/tests/2-ir-gen/autogen/testcases/lv2/funcall_type_mismatch2.cminus
new file mode 100644
index 0000000..74c9096
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/funcall_type_mismatch2.cminus
@@ -0,0 +1,11 @@
+void f(float a) {
+    outputFloat(a);
+    return;
+}
+
+void main(void) {
+    int a;
+    a = 4.5;
+    f(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/funcall_var.cminus b/tests/2-ir-gen/autogen/testcases/lv2/funcall_var.cminus
new file mode 100644
index 0000000..0bc2d84
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/funcall_var.cminus
@@ -0,0 +1,11 @@
+void test(int a) {
+    output(a);
+    return;
+}
+
+void main(void) {
+    int a;
+    a = 10;
+    test(a);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/return_in_middle1.cminus b/tests/2-ir-gen/autogen/testcases/lv2/return_in_middle1.cminus
new file mode 100644
index 0000000..b71cb27
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/return_in_middle1.cminus
@@ -0,0 +1,16 @@
+int result(void) {
+    int i;
+    if (1) {
+        i = 1;
+        return 0;
+    } else {
+        i = 2;
+    }
+    output(3);
+    return 3;
+}
+
+void main(void) {
+    output(result());
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/return_in_middle2.cminus b/tests/2-ir-gen/autogen/testcases/lv2/return_in_middle2.cminus
new file mode 100644
index 0000000..9412aef
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/return_in_middle2.cminus
@@ -0,0 +1,14 @@
+int result(void) {
+    int i;
+    i = 10;
+    while (i > 0) {
+        return 0;
+    }
+    output(4);
+    return 1;
+}
+
+void main(void) {
+    output(result());
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/return_type_mismatch1.cminus b/tests/2-ir-gen/autogen/testcases/lv2/return_type_mismatch1.cminus
new file mode 100644
index 0000000..ae7047d
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/return_type_mismatch1.cminus
@@ -0,0 +1,6 @@
+int f(void) { return 233.3; }
+
+void main(void) {
+    output(f());
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv2/return_type_mismatch2.cminus b/tests/2-ir-gen/autogen/testcases/lv2/return_type_mismatch2.cminus
new file mode 100644
index 0000000..4d8b0cd
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv2/return_type_mismatch2.cminus
@@ -0,0 +1,6 @@
+float f(void) { return 7; }
+
+void main(void) {
+    outputFloat(f());
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv3/complex1.cminus b/tests/2-ir-gen/autogen/testcases/lv3/complex1.cminus
new file mode 100644
index 0000000..b489c94
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv3/complex1.cminus
@@ -0,0 +1,71 @@
+/*
+     This code is adapted from Dik T. Winter at CWI
+     It computes pi to 800 decimal digits
+ */
+
+int mod(int a, int b) { return a - a / b * b; }
+
+void printfour(int input) {
+    int a;
+    int b;
+    int c;
+    int d;
+    input = mod(input, 10000);
+    d = mod(input, 10);
+    input = input / 10;
+    c = mod(input, 10);
+    input = input / 10;
+    b = mod(input, 10);
+    input = input / 10;
+    a = input;
+    output(a);
+    output(b);
+    output(c);
+    output(d);
+    return;
+}
+
+void main(void) {
+    int r[2801];
+    int i;
+    int k;
+    int b;
+    int d;
+    int c;
+    c = 0;
+    d = 1234;
+
+    {
+        int mod;
+        mod = 0;
+        while (mod < 2800) {
+            r[mod] = 2000;
+            mod = mod + 1;
+        }
+    }
+
+    k = 2800;
+    while (k) {
+        int d;
+        d = 0;
+        i = k;
+
+        while (i != 0) {
+            d = d + r[i] * 10000;
+            b = 2 * i - 1;
+            r[i] = mod(d, b);
+            d = d / b;
+            i = i - 1;
+            if (i != 0) {
+                d = d * i;
+            }
+        }
+
+        printfour(c + d / 10000);
+        c = mod(d, 10000);
+
+        k = k - 14;
+    }
+
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv3/complex2.cminus b/tests/2-ir-gen/autogen/testcases/lv3/complex2.cminus
new file mode 100644
index 0000000..2a7e064
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv3/complex2.cminus
@@ -0,0 +1,50 @@
+/* this is the sample program in C- in the book "Compiler Construction" */
+/* A program to perform selection sort on a 10 element array. */
+float x[10];
+int minloc(float a[], float low, int high) {
+    int i;
+    int x;
+    int k;
+    k = low;
+    x = a[low];
+    i = low + 1;
+    while (i < high) {
+        if (a[i] < x) {
+            x = a[i];
+            k = i;
+        }
+        i = i + 1;
+    }
+    return k;
+}
+
+void sort(float a[], int low, float high) {
+    int i;
+    int k;
+    i = low;
+    while (i < high - 1) {
+        int t;
+        k = minloc(a, i, high);
+        t = a[k];
+        a[k] = a[i];
+        a[i] = t;
+        i = i + 1;
+    }
+    return;
+}
+
+void main(void) {
+    int i;
+    i = 0;
+    while (i < 10) {
+        x[i] = input();
+        i = i + 1;
+    }
+    sort(x, 0, 10);
+    i = 0;
+    while (i < 10) {
+        output(x[i]);
+        i = i + 1;
+    }
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv3/complex3.cminus b/tests/2-ir-gen/autogen/testcases/lv3/complex3.cminus
new file mode 100644
index 0000000..aa8fd08
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv3/complex3.cminus
@@ -0,0 +1,22 @@
+int gcd(int u, int v) {
+    if (v == 0)
+        return u;
+    else
+        return gcd(v, u - u / v * v);
+}
+
+void main(void) {
+    int x;
+    int y;
+    int temp;
+    x = input();
+    y = input();
+    if (x < y) {
+        temp = x;
+        x = y;
+        y = temp;
+    }
+    temp = gcd(x, y);
+    output(temp);
+    return;
+}
diff --git a/tests/2-ir-gen/autogen/testcases/lv3/complex4.cminus b/tests/2-ir-gen/autogen/testcases/lv3/complex4.cminus
new file mode 100644
index 0000000..db09eb0
--- /dev/null
+++ b/tests/2-ir-gen/autogen/testcases/lv3/complex4.cminus
@@ -0,0 +1,105 @@
+float get(float a[], int x, int y, int row) { return a[x * row + y]; }
+
+float abs(float x) {
+    if (x > 0)
+        return x;
+    else
+        return 0 - x;
+}
+
+float isZero(float t) { return abs(t) < 0.000001; }
+
+int gauss(float vars[], float equ[], int var) {
+    int i;
+    int j;
+    int k;
+    int varone;
+    int maxr;
+    int col;
+    float temp;
+    varone = var + 1;
+
+    i = 0;
+    while (i < var) {
+        vars[i] = 0;
+        i = i + 1;
+    }
+
+    col = 0;
+    k = 0;
+    while (k < var) {
+        maxr = k;
+        i = k + 1;
+        while (i < var) {
+            if (abs(get(equ, i, col, varone)) > abs(get(equ, maxr, col, varone)))
+                maxr = i;
+            i = i + 1;
+        }
+        if (maxr != k) {
+            j = k;
+
+            while (j < varone) {
+                temp = get(equ, k, j, varone);
+                equ[k * varone + j] = get(equ, maxr, j, varone);
+                equ[maxr * varone + j] = temp;
+                j = j + 1;
+            }
+        }
+        if (isZero(get(equ, k, col, varone))) {
+            k = k - 1;
+        } else {
+            i = k + 1;
+            while (i < var) {
+                if (1 - isZero(get(equ, i, col, varone))) {
+                    temp = get(equ, i, col, varone) / get(equ, k, col, varone);
+                    j = col;
+                    while (j < varone) {
+                        equ[i * varone + j] = equ[i * varone + j] - get(equ, k, j, varone) * temp;
+                        j = j + 1;
+                    }
+                }
+                i = i + 1;
+            }
+        }
+        k = k + 1;
+        col = col + 1;
+    }
+
+    i = var - 1;
+    while (i >= 0) {
+        temp = get(equ, i, var, varone);
+        j = i + 1;
+        while (j < var) {
+            if (1 - isZero(get(equ, i, j, varone)))
+                temp = temp - get(equ, i, j, varone) * vars[j];
+            j = j + 1;
+        }
+        vars[i] = temp / get(equ, i, i, varone);
+        i = i - 1;
+    }
+    return 0;
+}
+
+void main(void) {
+    int num;
+    float vars[3];
+    float equ[12];
+    equ[0] = 1;
+    equ[1] = 2;
+    equ[2] = 1;
+    equ[3] = 1;
+    equ[1 * 4 + 0] = 2;
+    equ[1 * 4 + 1] = 3;
+    equ[1 * 4 + 2] = 4;
+    equ[1 * 4 + 3] = 3;
+    equ[2 * 4 + 0] = 1;
+    equ[2 * 4 + 1] = 1;
+    equ[2 * 4 + 2] = 0 - 2;
+    equ[2 * 4 + 3] = 0;
+    gauss(vars, equ, 3);
+    num = 0;
+    while (num < 3) {
+        outputFloat(vars[num]);
+        num = num + 1;
+    }
+}
diff --git a/tests/2-ir-gen/warmup/CMakeLists.txt b/tests/2-ir-gen/warmup/CMakeLists.txt
new file mode 100755
index 0000000..cf5bb42
--- /dev/null
+++ b/tests/2-ir-gen/warmup/CMakeLists.txt
@@ -0,0 +1,45 @@
+add_subdirectory(calculator)
+add_executable(
+    gcd_array_generator
+    ta_gcd/gcd_array_generator.cpp
+)
+target_link_libraries(
+    gcd_array_generator
+    IR_lib
+)
+
+add_executable(
+    stu_assign_generator
+    stu_cpp/assign_generator.cpp
+)
+target_link_libraries(
+    stu_assign_generator
+    IR_lib
+)
+
+add_executable(
+    stu_fun_generator
+    stu_cpp/fun_generator.cpp
+)
+target_link_libraries(
+    stu_fun_generator
+    IR_lib
+)
+
+add_executable(
+    stu_if_generator
+    stu_cpp/if_generator.cpp
+)
+target_link_libraries(
+    stu_if_generator
+    IR_lib
+)
+
+add_executable(
+    stu_while_generator
+    stu_cpp/while_generator.cpp
+)
+target_link_libraries(
+    stu_while_generator
+    IR_lib
+)
diff --git a/tests/2-ir-gen/warmup/c_cases/assign.c b/tests/2-ir-gen/warmup/c_cases/assign.c
new file mode 100644
index 0000000..49ba596
--- /dev/null
+++ b/tests/2-ir-gen/warmup/c_cases/assign.c
@@ -0,0 +1,6 @@
+int main() {
+    int a[10];
+    a[0] = 10;
+    a[1] = a[0] * 2;
+    return a[1];
+}
diff --git a/tests/2-ir-gen/warmup/c_cases/fun.c b/tests/2-ir-gen/warmup/c_cases/fun.c
new file mode 100644
index 0000000..7ab3a4b
--- /dev/null
+++ b/tests/2-ir-gen/warmup/c_cases/fun.c
@@ -0,0 +1,2 @@
+int callee(int a) { return 2 * a; }
+int main() { return callee(110); }
diff --git a/tests/2-ir-gen/warmup/c_cases/if.c b/tests/2-ir-gen/warmup/c_cases/if.c
new file mode 100644
index 0000000..9c3b3ed
--- /dev/null
+++ b/tests/2-ir-gen/warmup/c_cases/if.c
@@ -0,0 +1,6 @@
+int main() {
+    float a = 5.555;
+    if (a > 1)
+        return 233;
+    return 0;
+}
diff --git a/tests/2-ir-gen/warmup/c_cases/while.c b/tests/2-ir-gen/warmup/c_cases/while.c
new file mode 100644
index 0000000..dbd2479
--- /dev/null
+++ b/tests/2-ir-gen/warmup/c_cases/while.c
@@ -0,0 +1,11 @@
+int main() {
+    int a;
+    int i;
+    a = 10;
+    i = 0;
+    while (i < 10) {
+        i = i + 1;
+        a = a + i;
+    }
+    return a;
+}
diff --git a/tests/2-ir-gen/warmup/calculator/CMakeLists.txt b/tests/2-ir-gen/warmup/calculator/CMakeLists.txt
new file mode 100644
index 0000000..98c4d47
--- /dev/null
+++ b/tests/2-ir-gen/warmup/calculator/CMakeLists.txt
@@ -0,0 +1,27 @@
+flex_target(calc_lex calculator.l ${CMAKE_CURRENT_BINARY_DIR}/calc_lex.c)
+bison_target(calc_syntax calculator.y
+  ${CMAKE_CURRENT_BINARY_DIR}/calc_syntax.c
+  DEFINES_FILE ${PROJECT_BINARY_DIR}/calculator.h)
+add_flex_bison_dependency(calc_lex calc_syntax)
+add_library(calc_syntax STATIC
+  ${BISON_calc_syntax_OUTPUTS}
+  ${FLEX_calc_lex_OUTPUTS}
+)
+
+add_executable(
+    calc
+    calc.cpp
+    calc_ast.cpp
+    calc_builder.cpp
+)
+target_link_libraries(
+    calc
+    IR_lib
+    calc_syntax
+    common
+)
+
+install(
+    TARGETS calc
+    RUNTIME DESTINATION bin
+)
\ No newline at end of file
diff --git a/tests/2-ir-gen/warmup/calculator/calc.cpp b/tests/2-ir-gen/warmup/calculator/calc.cpp
new file mode 100644
index 0000000..3a156a2
--- /dev/null
+++ b/tests/2-ir-gen/warmup/calculator/calc.cpp
@@ -0,0 +1,48 @@
+extern "C" {
+#include "syntax_tree.h"
+extern syntax_tree *parse(const char *);
+}
+#include "calc_ast.hpp"
+#include "calc_builder.hpp"
+
+#include <cstdio>
+#include <fstream>
+using namespace std::literals::string_literals;
+
+int main(int argc, char *argv[]) {
+    syntax_tree *tree = NULL;
+    const char *input = NULL;
+
+    if (argc >= 3) {
+        printf("usage: %s\n", argv[0]);
+        printf("usage: %s <cminus_file>\n", argv[0]);
+        return 1;
+    }
+
+    if (argc == 2) {
+        input = argv[1];
+    } else {
+        printf("Input an arithmatic expression (press Ctrl+D in a new line after you finish the expression):\n");
+    }
+
+    tree = parse(input);
+    CalcAST ast(tree);
+    CalcBuilder builder;
+    auto module = builder.build(ast);
+    auto IR = module->print();
+
+    std::ofstream output_stream;
+    auto output_file = "result.ll";
+    output_stream.open(output_file, std::ios::out);
+    output_stream << "; ModuleID = 'calculator'\n";
+    output_stream << IR;
+    output_stream.close();
+    auto command_string = "clang -O0 -w "s + "result.ll -o result -L. -lcminus_io";
+    auto ret = std::system(command_string.c_str());
+    if (ret) {
+        printf("something went wrong!\n");
+    } else {
+        printf("result and result.ll have been generated.\n");
+    }
+    return ret;
+}
diff --git a/tests/2-ir-gen/warmup/calculator/calc_ast.cpp b/tests/2-ir-gen/warmup/calculator/calc_ast.cpp
new file mode 100644
index 0000000..0701dfa
--- /dev/null
+++ b/tests/2-ir-gen/warmup/calculator/calc_ast.cpp
@@ -0,0 +1,115 @@
+#include "calc_ast.hpp"
+
+#include <cstring>
+#include <iostream>
+#include <stack>
+#define _AST_NODE_ERROR_                                                       \
+    std::cerr << "Abort due to node cast error."                               \
+                 "Contact with TAs to solve your problem."                     \
+              << std::endl;                                                    \
+    std::abort();
+#define _STR_EQ(a, b) (strcmp((a), (b)) == 0)
+
+void CalcAST::run_visitor(CalcASTVisitor &visitor) { root->accept(visitor); }
+
+CalcAST::CalcAST(syntax_tree *s) {
+    if (s == nullptr) {
+        std::cerr << "empty input tree!" << std::endl;
+        std::abort();
+    }
+    auto node = transform_node_iter(s->root);
+    del_syntax_tree(s);
+    root = std::shared_ptr<CalcASTInput>(static_cast<CalcASTInput *>(node));
+}
+
+CalcASTNode *CalcAST::transform_node_iter(syntax_tree_node *n) {
+    if (_STR_EQ(n->name, "input")) {
+        auto node = new CalcASTInput();
+        auto expr_node = static_cast<CalcASTExpression *>(
+            transform_node_iter(n->children[0]));
+        node->expression = std::shared_ptr<CalcASTExpression>(expr_node);
+        return node;
+    } else if (_STR_EQ(n->name, "expression")) {
+        auto node = new CalcASTExpression();
+        if (n->children_num == 3) {
+            auto add_expr_node = static_cast<CalcASTExpression *>(
+                transform_node_iter(n->children[0]));
+            node->expression =
+                std::shared_ptr<CalcASTExpression>(add_expr_node);
+
+            auto op_name = n->children[1]->children[0]->name;
+            if (_STR_EQ(op_name, "+"))
+                node->op = OP_PLUS;
+            else if (_STR_EQ(op_name, "-"))
+                node->op = OP_MINUS;
+
+            auto term_node =
+                static_cast<CalcASTTerm *>(transform_node_iter(n->children[2]));
+            node->term = std::shared_ptr<CalcASTTerm>(term_node);
+        } else {
+            auto term_node =
+                static_cast<CalcASTTerm *>(transform_node_iter(n->children[0]));
+            node->term = std::shared_ptr<CalcASTTerm>(term_node);
+        }
+        return node;
+    } else if (_STR_EQ(n->name, "term")) {
+        auto node = new CalcASTTerm();
+        if (n->children_num == 3) {
+            auto term_node =
+                static_cast<CalcASTTerm *>(transform_node_iter(n->children[0]));
+            node->term = std::shared_ptr<CalcASTTerm>(term_node);
+
+            auto op_name = n->children[1]->children[0]->name;
+            if (_STR_EQ(op_name, "*"))
+                node->op = OP_MUL;
+            else if (_STR_EQ(op_name, "/"))
+                node->op = OP_DIV;
+
+            auto factor_node = static_cast<CalcASTFactor *>(
+                transform_node_iter(n->children[2]));
+            node->factor = std::shared_ptr<CalcASTFactor>(factor_node);
+        } else {
+            auto factor_node = static_cast<CalcASTFactor *>(
+                transform_node_iter(n->children[0]));
+            node->factor = std::shared_ptr<CalcASTFactor>(factor_node);
+        }
+        return node;
+    } else if (_STR_EQ(n->name, "factor")) {
+        if (n->children_num == 3) {
+            return transform_node_iter(n->children[1]);
+        } else {
+            auto num_node = new CalcASTNum();
+            num_node->val = std::stoi(n->children[0]->children[0]->name);
+            return num_node;
+        }
+    } else {
+        std::cerr << "[calc_ast]: transform failure!" << std::endl;
+        std::abort();
+    }
+}
+
+void CalcASTNum::accept(CalcASTVisitor &visitor) { visitor.visit(*this); }
+void CalcASTTerm::accept(CalcASTVisitor &visitor) { visitor.visit(*this); }
+void CalcASTExpression::accept(CalcASTVisitor &visitor) {
+    visitor.visit(*this);
+}
+
+void CalcASTInput::accept(CalcASTVisitor &visitor) {
+    expression->accept(visitor);
+}
+
+void CalcASTFactor::accept(CalcASTVisitor &visitor) {
+    auto expr = dynamic_cast<CalcASTExpression *>(this);
+    if (expr) {
+        expr->accept(visitor);
+        return;
+    }
+
+    auto num = dynamic_cast<CalcASTNum *>(this);
+    if (num) {
+        num->accept(visitor);
+        return;
+    }
+
+    _AST_NODE_ERROR_
+}
diff --git a/tests/2-ir-gen/warmup/calculator/calc_ast.hpp b/tests/2-ir-gen/warmup/calculator/calc_ast.hpp
new file mode 100644
index 0000000..e9281e6
--- /dev/null
+++ b/tests/2-ir-gen/warmup/calculator/calc_ast.hpp
@@ -0,0 +1,90 @@
+#pragma once
+
+extern "C" {
+#include "syntax_tree.h"
+extern syntax_tree *parse(const char *input);
+}
+#include <memory>
+#include <vector>
+
+enum AddOp {
+    // +
+    OP_PLUS,
+    // -
+    OP_MINUS
+};
+
+enum MulOp {
+    // *
+    OP_MUL,
+    // /
+    OP_DIV
+};
+
+class CalcAST;
+
+struct CalcASTNode;
+struct CalcASTInput;
+struct CalcASTExpression;
+struct CalcASTNum;
+struct CalcASTTerm;
+struct CalcASTFactor;
+
+class CalcASTVisitor;
+
+class CalcAST {
+  public:
+    CalcAST() = delete;
+    CalcAST(syntax_tree *);
+    CalcAST(CalcAST &&tree) {
+        root = tree.root;
+        tree.root = nullptr;
+    }
+    CalcASTInput *get_root() { return root.get(); }
+    void run_visitor(CalcASTVisitor &visitor);
+
+  private:
+    CalcASTNode *transform_node_iter(syntax_tree_node *);
+    std::shared_ptr<CalcASTInput> root = nullptr;
+};
+
+struct CalcASTNode {
+    virtual void accept(CalcASTVisitor &) = 0;
+    virtual ~CalcASTNode() = default;
+};
+
+struct CalcASTInput : CalcASTNode {
+    virtual void accept(CalcASTVisitor &) override final;
+    std::shared_ptr<CalcASTExpression> expression;
+};
+
+struct CalcASTFactor : CalcASTNode {
+    virtual void accept(CalcASTVisitor &) override;
+};
+
+struct CalcASTNum : CalcASTFactor {
+    virtual void accept(CalcASTVisitor &) override final;
+    int val;
+};
+
+struct CalcASTExpression : CalcASTFactor {
+    virtual void accept(CalcASTVisitor &) override final;
+    std::shared_ptr<CalcASTExpression> expression;
+    AddOp op;
+    std::shared_ptr<CalcASTTerm> term;
+};
+
+struct CalcASTTerm : CalcASTNode {
+    virtual void accept(CalcASTVisitor &) override final;
+    std::shared_ptr<CalcASTTerm> term;
+    MulOp op;
+    std::shared_ptr<CalcASTFactor> factor;
+};
+
+class CalcASTVisitor {
+  public:
+    virtual void visit(CalcASTInput &) = 0;
+    virtual void visit(CalcASTNum &) = 0;
+    virtual void visit(CalcASTExpression &) = 0;
+    virtual void visit(CalcASTTerm &) = 0;
+};
diff --git a/tests/2-ir-gen/warmup/calculator/calc_builder.cpp b/tests/2-ir-gen/warmup/calculator/calc_builder.cpp
new file mode 100644
index 0000000..37140ee
--- /dev/null
+++ b/tests/2-ir-gen/warmup/calculator/calc_builder.cpp
@@ -0,0 +1,63 @@
+#include "calc_builder.hpp"
+#include <memory>
+std::unique_ptr<Module> CalcBuilder::build(CalcAST &ast) {
+    module = std::unique_ptr<Module>(new Module());
+    builder = std::make_unique<IRBuilder>(nullptr, module.get());
+    auto TyVoid = module->get_void_type();
+    TyInt32 = module->get_int32_type();
+
+    std::vector<Type *> output_params;
+    output_params.push_back(TyInt32);
+    auto output_type = FunctionType::get(TyVoid, output_params);
+    auto output_fun = Function::create(output_type, "output", module.get());
+    auto main =
+        Function::create(FunctionType::get(TyInt32, {}), "main", module.get());
+    auto bb = BasicBlock::create(module.get(), "entry", main);
+    builder->set_insert_point(bb);
+    ast.run_visitor(*this);
+    builder->create_call(output_fun, {val});
+    builder->create_ret(ConstantInt::get(0, module.get()));
+    return std::move(module);
+}
+void CalcBuilder::visit(CalcASTInput &node) { node.expression->accept(*this); }
+void CalcBuilder::visit(CalcASTExpression &node) {
+    if (node.expression == nullptr) {
+        node.term->accept(*this);
+    } else {
+        node.expression->accept(*this);
+        auto l_val = val;
+        node.term->accept(*this);
+        auto r_val = val;
+        switch (node.op) {
+        case OP_PLUS:
+            val = builder->create_iadd(l_val, r_val);
+            break;
+        case OP_MINUS:
+            val = builder->create_isub(l_val, r_val);
+            break;
+        }
+    }
+}
+
+void CalcBuilder::visit(CalcASTTerm &node) {
+    if (node.term == nullptr) {
+        node.factor->accept(*this);
+    } else {
+        node.term->accept(*this);
+        auto l_val = val;
+        node.factor->accept(*this);
+        auto r_val = val;
+        switch (node.op) {
+        case OP_MUL:
+            val = builder->create_imul(l_val, r_val);
+            break;
+        case OP_DIV:
+            val = builder->create_isdiv(l_val, r_val);
+            break;
+        }
+    }
+}
+
+void CalcBuilder::visit(CalcASTNum &node) {
+    val = ConstantInt::get(node.val, module.get());
+}
diff --git a/tests/2-ir-gen/warmup/calculator/calc_builder.hpp b/tests/2-ir-gen/warmup/calculator/calc_builder.hpp
new file mode 100644
index 0000000..b2fe0d5
--- /dev/null
+++ b/tests/2-ir-gen/warmup/calculator/calc_builder.hpp
@@ -0,0 +1,26 @@
+#pragma once
+
+#include "BasicBlock.hpp"
+#include "Constant.hpp"
+#include "Function.hpp"
+#include "IRBuilder.hpp"
+#include "Module.hpp"
+#include "Type.hpp"
+#include "calc_ast.hpp"
+#include <memory>
+
+class CalcBuilder : public CalcASTVisitor {
+  public:
+    std::unique_ptr<Module> build(CalcAST &ast);
+
+  private:
+    virtual void visit(CalcASTInput &) override final;
+    virtual void visit(CalcASTNum &) override final;
+    virtual void visit(CalcASTExpression &) override final;
+    virtual void visit(CalcASTTerm &) override final;
+
+    std::unique_ptr<IRBuilder> builder;
+    Value *val;
+    Type *TyInt32;
+    std::unique_ptr<Module> module;
+};
diff --git a/tests/2-ir-gen/warmup/calculator/calculator.l b/tests/2-ir-gen/warmup/calculator/calculator.l
new file mode 100644
index 0000000..210e73a
--- /dev/null
+++ b/tests/2-ir-gen/warmup/calculator/calculator.l
@@ -0,0 +1,36 @@
+%option noyywrap
+%{
+/*****************声明和选项设置  begin*****************/
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "syntax_tree.h"
+#include "calculator.h"
+
+int lines;
+int pos_start;
+int pos_end;
+
+void pass_node(char *text){
+     yylval.node = new_syntax_tree_node(text);
+}
+
+/*****************声明和选项设置  end*****************/
+
+%}
+
+%x COMMENT
+
+%%
+
+\+ 	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return ADD;}
+\-	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return SUB;}
+\*	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return MUL;}
+\/	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return DIV;}
+\(	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return LPARENTHESE;}
+\)	{pos_start = pos_end; pos_end += 1; pass_node(yytext); return RPARENTHESE;}
+[0-9]+ { pos_start = pos_end; pos_end += strlen(yytext); pass_node(yytext); return NUM;}
+
+\n 	{lines++; pos_start = 1; pos_end = 1;}
+[ \t] 	{pos_start = pos_end; pos_end += 1;}
+%%
diff --git a/tests/2-ir-gen/warmup/calculator/calculator.y b/tests/2-ir-gen/warmup/calculator/calculator.y
new file mode 100644
index 0000000..b94d8a7
--- /dev/null
+++ b/tests/2-ir-gen/warmup/calculator/calculator.y
@@ -0,0 +1,108 @@
+%{
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "syntax_tree.h"
+
+// external functions from lex
+extern int yylex();
+extern int yyparse();
+extern int yyrestart();
+extern FILE * yyin;
+
+// external variables from lexical_analyzer module
+extern int lines;
+extern char * yytext;
+extern int pos_end;
+extern int pos_start;
+
+// Global syntax tree
+syntax_tree *gt;
+
+// Error reporting
+void yyerror(const char *s);
+syntax_tree_node *node(const char *node_name, int children_num, ...);
+%}
+
+%union {
+     struct _syntax_tree_node * node;
+     char * name;
+}
+
+%token <node> ADD
+%token <node> SUB
+%token <node> MUL
+%token <node> DIV
+%token <node> NUM
+%token <node> LPARENTHESE
+%token <node> RPARENTHESE
+%type <node> input expression addop term mulop factor num
+
+%start input
+
+%%
+input : expression {$$ = node( "input", 1, $1); gt->root = $$;}
+    ;
+expression : expression addop term  {$$ = node( "expression", 3, $1, $2, $3);}
+    |   term {$$ = node( "expression", 1, $1);}
+    ;
+
+addop : ADD {$$ = node( "addop", 1, $1);}
+    |  SUB {$$ = node( "addop", 1, $1);}
+    ;
+
+term : term mulop factor {$$ = node( "term", 3, $1, $2, $3);}
+    |   factor {$$ = node( "term", 1, $1);}
+    ;
+
+mulop : MUL {$$ = node( "mulop", 1, $1);}
+    |  DIV {$$ = node( "mulop", 1, $1);}
+    ;
+
+factor : LPARENTHESE expression RPARENTHESE {$$ = node( "factor", 3, $1, $2, $3);}
+    |  num {$$ = node( "factor", 1, $1);}
+    ;
+
+num : NUM {$$ = node( "num", 1, $1);}
+%%
+
+void yyerror(const char * s) {
+    fprintf(stderr, "error at line %d column %d: %s\n", lines, pos_start, s);
+}
+
+syntax_tree *parse(const char *input_path) {
+    if (input_path != NULL) {
+        if (!(yyin = fopen(input_path, "r"))) {
+            fprintf(stderr, "[ERR] Open input file %s failed.\n", input_path);
+            exit(1);
+        }
+    } else {
+        yyin = stdin;
+    }
+
+    lines = pos_start = pos_end = 1;
+    gt = new_syntax_tree();
+    yyrestart(yyin);
+    yyparse();
+    return gt;
+}
+
+syntax_tree_node *node(const char *name, int children_num, ...) {
+    syntax_tree_node *p = new_syntax_tree_node(name);
+    syntax_tree_node *child;
+    if (children_num == 0) {
+        child = new_syntax_tree_node("epsilon");
+        syntax_tree_add_child(p, child);
+    } else {
+        va_list ap;
+        va_start(ap, children_num);
+        for (int i = 0; i < children_num; ++i) {
+            child = va_arg(ap, syntax_tree_node *);
+            syntax_tree_add_child(p, child);
+        }
+        va_end(ap);
+    }
+    return p;
+}
diff --git a/tests/2-ir-gen/warmup/stu_cpp/assign_generator.cpp b/tests/2-ir-gen/warmup/stu_cpp/assign_generator.cpp
new file mode 100644
index 0000000..c272dab
--- /dev/null
+++ b/tests/2-ir-gen/warmup/stu_cpp/assign_generator.cpp
@@ -0,0 +1 @@
+int main() {}
\ No newline at end of file
diff --git a/tests/2-ir-gen/warmup/stu_cpp/fun_generator.cpp b/tests/2-ir-gen/warmup/stu_cpp/fun_generator.cpp
new file mode 100644
index 0000000..c272dab
--- /dev/null
+++ b/tests/2-ir-gen/warmup/stu_cpp/fun_generator.cpp
@@ -0,0 +1 @@
+int main() {}
\ No newline at end of file
diff --git a/tests/2-ir-gen/warmup/stu_cpp/if_generator.cpp b/tests/2-ir-gen/warmup/stu_cpp/if_generator.cpp
new file mode 100644
index 0000000..c272dab
--- /dev/null
+++ b/tests/2-ir-gen/warmup/stu_cpp/if_generator.cpp
@@ -0,0 +1 @@
+int main() {}
\ No newline at end of file
diff --git a/tests/2-ir-gen/warmup/stu_cpp/while_generator.cpp b/tests/2-ir-gen/warmup/stu_cpp/while_generator.cpp
new file mode 100644
index 0000000..237c8ce
--- /dev/null
+++ b/tests/2-ir-gen/warmup/stu_cpp/while_generator.cpp
@@ -0,0 +1 @@
+int main() {}
diff --git a/tests/2-ir-gen/warmup/stu_ll/assign_hand.ll b/tests/2-ir-gen/warmup/stu_ll/assign_hand.ll
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/warmup/stu_ll/fun_hand.ll b/tests/2-ir-gen/warmup/stu_ll/fun_hand.ll
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/warmup/stu_ll/if_hand.ll b/tests/2-ir-gen/warmup/stu_ll/if_hand.ll
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/warmup/stu_ll/while_hand.ll b/tests/2-ir-gen/warmup/stu_ll/while_hand.ll
new file mode 100644
index 0000000..e69de29
diff --git a/tests/2-ir-gen/warmup/ta_gcd/gcd_array.c b/tests/2-ir-gen/warmup/ta_gcd/gcd_array.c
new file mode 100644
index 0000000..033ccba
--- /dev/null
+++ b/tests/2-ir-gen/warmup/ta_gcd/gcd_array.c
@@ -0,0 +1,29 @@
+int x[1];
+int y[1];
+
+int gcd(int u, int v) {
+    if (v == 0)
+        return u;
+    else
+        return gcd(v, u - u / v * v);
+}
+
+int funArray(int u[], int v[]) {
+    int a;
+    int b;
+    int temp;
+    a = u[0];
+    b = v[0];
+    if (a < b) {
+        temp = a;
+        a = b;
+        b = temp;
+    }
+    return gcd(a, b);
+}
+
+int main(void) {
+    x[0] = 90;
+    y[0] = 18;
+    return funArray(x, y);
+}
\ No newline at end of file
diff --git a/tests/2-ir-gen/warmup/ta_gcd/gcd_array_generator.cpp b/tests/2-ir-gen/warmup/ta_gcd/gcd_array_generator.cpp
new file mode 100644
index 0000000..5a1e9fe
--- /dev/null
+++ b/tests/2-ir-gen/warmup/ta_gcd/gcd_array_generator.cpp
@@ -0,0 +1,230 @@
+#include "BasicBlock.hpp"
+#include "Constant.hpp"
+#include "Function.hpp"
+#include "IRBuilder.hpp"
+#include "Module.hpp"
+#include "Type.hpp"
+
+#include <iostream>
+#include <memory>
+
+// 定义一个从常数值获取/创建 ConstantInt 类实例化的宏，方便多次调用
+#define CONST_INT(num) ConstantInt::get(num, module)
+
+// 定义一个从常数值获取/创建 ConstantFP 类实例化的宏，方便多次调用
+#define CONST_FP(num) ConstantFP::get(num, module)
+
+int main() {
+    // 创建一个 Module 实例
+    auto module = new Module();
+    // 创建一个 IRBuilder 实例（后续创建指令均使用此实例操作）
+    auto builder = new IRBuilder(nullptr, module);
+    // 从 Module 处取出 32 位整形 type 的实例
+    Type *Int32Type = module->get_int32_type();
+    // 使用取出的 32 位整形与数组长度 1，创建数组类型 [1 x i32]
+    auto *arrayType = ArrayType::get(Int32Type, 1);
+    // 创建 0 常数类实例化，用于全局变量的初始化（目前全局变量仅支持初始化为 0）
+    auto initializer = ConstantZero::get(Int32Type, module);
+    // 为全局数组变量分配空间。参数解释：名字 name，所属 module，待分配空间类型
+    // type，标志全局变量是否有 const 限定（cminus 中全是 false），初始化值
+    auto x = GlobalVariable::create("x", module, arrayType, false, initializer);
+    // 为另一个全局数组分配空间
+    auto y = GlobalVariable::create("y", module, arrayType, false, initializer);
+    // 接下来创建 gcd 函数
+    // 声明函数参数类型的 vector，此处的 vector 数组含有两个元素，每个均为
+    // Int32Type，表明待创建函数有两个参数，类型均为 Int32Type 实例代表的类型
+    std::vector<Type *> Ints(2, Int32Type);
+    // 创建函数类型，FunctionType::get
+    // 的第一个参数是函数返回值类型，第二个是函数参数类型列表
+    auto gcdFunTy = FunctionType::get(Int32Type, Ints);
+    // 通过函数类型创建函数 gcd，输入参数解释：函数类型，函数名 name，函数所属
+    // module
+    auto gcdFun = Function::create(gcdFunTy, "gcd", module);
+    // 为函数 gcd 创建起始 BasicBlock，参数解释：所属 module，名称
+    // name，所属函数
+    auto bb = BasicBlock::create(module, "entry", gcdFun);
+    // 将辅助类实例化 builder 插入指令的起始位置设置在 bb 对应的 BasicBlock
+    builder->set_insert_point(bb);
+    // 使用辅助类实例化 builder 创建了一条 alloca 指令，在栈上分配返回值的空间
+    auto retAlloca = builder->create_alloca(Int32Type);
+    // 使用辅助类实例化 builder 创建了一条 alloca 指令，在栈上分配参数 u 的空间
+    auto uAlloca = builder->create_alloca(Int32Type);
+    // 使用辅助类实例化 builder 创建了一条 alloca 指令，在栈上分配参数 u 的空间
+    auto vAlloca = builder->create_alloca(Int32Type);
+    // 获取 gcd 函数的形参，通过 Function 中的 iterator
+    std::vector<Value *> args;
+    for (auto &arg : gcdFun->get_args()) {
+        args.push_back(&arg);
+    }
+    // 使用辅助类实例化 builder 创建了一条 store 指令，将参数 u store 下来
+    builder->create_store(args[0], uAlloca);
+    // 使用辅助类实例化 builder 创建了一条 store 指令，将参数 v store 下来
+    builder->create_store(args[1], vAlloca);
+    // 使用辅助类实例化 builder 创建了一条 load 指令，将参数 v load 出来
+    auto vLoad = builder->create_load(vAlloca);
+    // 使用辅助类实例化 builder 创建了一条 cmp eq 指令，将 v load 出来的值与 0
+    // 比较
+    auto icmp = builder->create_icmp_eq(vLoad, CONST_INT(0));
+    // 为函数 gcd 创建 BasicBlock 作为 true 分支
+    auto trueBB = BasicBlock::create(module, "trueBB", gcdFun);
+    // 为函数 gcd 创建 BasicBlock 作为 false 分支
+    auto falseBB = BasicBlock::create(module, "falseBB", gcdFun);
+    // 为函数 gcd 创建 BasicBlock 作为 return 分支，提前创建，以便在 true
+    // 分支中可以创建跳转到 return 分支的 br 指令
+    auto retBB = BasicBlock::create(module, "", gcdFun); // return 分支，
+    // 为 entrybb 创建终结指令，条件跳转指令，使用 icmp
+    // 指令的返回值作为条件，trueBB 与 falseBB 作为条件跳转的两个目的 basicblock
+    auto br = builder->create_cond_br(icmp, trueBB, falseBB);
+    // 将辅助类实例化 builder 插入指令的位置调整至 trueBB 上
+    builder->set_insert_point(trueBB);
+    // 使用辅助类实例化 builder 创建了一条 load 指令，将参数 u load 出来
+    auto uLoad = builder->create_load(uAlloca);
+    // 使用辅助类实例化 builder 创建了一条 store 指令，将参数 u store
+    // 至为返回值分配的空间
+    builder->create_store(uLoad, retAlloca);
+    // 使用 builder 创建一条强制跳转指令，跳转到 retBB 处
+    builder->create_br(retBB); // br retBB
+    // 将辅助类实例化 builder 插入指令的位置调整至 falseBB 上
+    builder->set_insert_point(falseBB);
+    // 使用 builder 创建了一条 load 指令，将参数 u load 出来
+    uLoad = builder->create_load(uAlloca);
+    // 使用 builder 创建了一条 load 指令，将参数 v load 出来
+    vLoad = builder->create_load(vAlloca);
+    // 使用 builder 创建了一条 sdiv 指令，计算 u/v 的值
+    auto div = builder->create_isdiv(uLoad, vLoad);
+    // 使用 builder 创建了一条 imul 指令，计算 v*u/v 的值
+    auto mul = builder->create_imul(div, vLoad);
+    // 使用 builder 创建了一条 isub 指令，计算 u-v*u/v 的值
+    auto sub = builder->create_isub(uLoad, mul);
+    // 创建 call 指令，调用 gcd 函数，传入的实参为 v load 指令的结果与 sub
+    // 指令计算的结果
+    auto call = builder->create_call(gcdFun, {vLoad, sub});
+    // 创建 store 指令，将 call 指令的结果存至为 gcd 函数返回值分配的空间
+    builder->create_store(call, retAlloca);
+    // 创建强制跳转指令，跳转至 retBB
+    builder->create_br(retBB); // br retBB
+    // 将 builder 插入指令的位置调整至 retBB 上
+    builder->set_insert_point(retBB); // ret 分支
+    // 使用 builder 创建了一条 load 指令，将 gcd 函数返回值 load 出来
+    auto retLoad = builder->create_load(retAlloca);
+    // 使用 builder 创建了一条 ret 指令，将 gcd 返回值 load 出来的结果作为 gcd
+    // 函数的返回值返回
+    builder->create_ret(retLoad);
+    // 接下来创建 funArray 函数
+    // 获得 32 位整形的指针类型，
+    auto Int32PtrType = module->get_int32_ptr_type();
+    // 初始化 funArray 函数的参数类型列表，第一个参数与第二个参数类型均为
+    // Int32PtrType，及 32 位整形的指针类型
+    std::vector<Type *> IntPtrs(2, Int32PtrType);
+    // 通过返回值类型与参数类型列表创建函数类型
+    auto funArrayFunType = FunctionType::get(Int32Type, IntPtrs);
+    // 通过函数类型创建函数
+    auto funArrayFun = Function::create(funArrayFunType, "funArray", module);
+    // 创建 funArray 函数的第一个 BasicBlock
+    bb = BasicBlock::create(module, "entry", funArrayFun);
+    // 将 builder 插入指令的位置调整至 funArray 的 entryBB 上
+    builder->set_insert_point(bb);
+    // 用 builder 创建 alloca 指令，用于 u 的存放，此处开始 u，v 指的是源代码中
+    // funArray 函数内的参数
+    auto upAlloca = builder->create_alloca(Int32PtrType);
+    // 用 builder 创建 alloca 指令，用于 v 的存放
+    auto vpAlloca = builder->create_alloca(Int32PtrType);
+    // 用 builder 创建 alloca 指令，用于 a 的存放
+    auto aAlloca = builder->create_alloca(Int32Type);
+    // 用 builder 创建 alloca 指令，用于 b 的存放
+    auto bAlloca = builder->create_alloca(Int32Type);
+    // 用 builder 创建 alloca 指令，用于 temp 的存放
+    auto tempAlloca = builder->create_alloca(Int32Type);
+    // 获取 funArrayFun 函数的形参，通过 Function 中的 iterator
+    std::vector<Value *> args1;
+    for (auto &arg : funArrayFun->get_args()) {
+        args1.push_back(&arg);
+    }
+    // 用 builder 创建 store 指令将参数 u store 下来
+    builder->create_store(args1[0], upAlloca);
+    // 用 builder 创建 store 指令将参数 v store 下来
+    builder->create_store(args1[1], vpAlloca);
+    // 用 builder 创建 load 指令将参数 u 的值 load 出来
+    auto u0pLoad = builder->create_load(upAlloca);
+    // 用 builder 创建 getelementptr 指令，参数解释：第一个参数传入
+    // getelementptr
+    // 的指针参数，第二个参数传入取偏移的数组。在此条语句中，u0pLoad 为
+    // i32*类型的指针，且只取一次偏移，偏移值为 0，因此返回的即为 u[0] 的地址
+    auto u0GEP = builder->create_gep(u0pLoad, {CONST_INT(0)});
+    // 用 builder 创建 load 指令，将 u[0] 的数据 load 出来
+    auto u0Load = builder->create_load(u0GEP);
+    // 用 builder 创建 store 指令，将 u[0] 的数据写入 a
+    builder->create_store(u0Load, aAlloca);
+    // 接下来几条指令含义同上
+    auto v0pLoad = builder->create_load(vpAlloca);
+    auto v0GEP = builder->create_gep(v0pLoad, {CONST_INT(0)});
+    auto v0Load = builder->create_load(v0GEP);
+    builder->create_store(v0Load, bAlloca);
+    // 用 builder 创建两条 load 指令吗，将 a，b 的值 load 出来
+    auto aLoad = builder->create_load(aAlloca);
+    auto bLoad = builder->create_load(bAlloca);
+    // 用 builder 创建 icmp lt 指令，指令操作数为 a，b load 出来的值
+    icmp = builder->create_icmp_lt(aLoad, bLoad);
+    // 为 if else 分支创建两个 BasicBlock
+    trueBB = BasicBlock::create(module, "trueBB", funArrayFun);
+    falseBB = BasicBlock::create(module, "falseBB", funArrayFun);
+    // 用 builder 创建一条条件跳转指令，使用 icmp 指令的返回值作为条件，trueBB
+    // 与 falseBB 作为条件跳转的两个目的 basicblock
+    builder->create_cond_br(icmp, trueBB, falseBB);
+    // 将 builder 插入指令的位置调整至 trueBB 上
+    builder->set_insert_point(trueBB);
+    // 用 builder 创建 store 指令，将 a 的值存到 temp 处，将 b 存到 a 处，将
+    // temp 重新 load 后存到 b 处，对应源代码 temp=a，a=b，b=temp
+    builder->create_store(aLoad, tempAlloca);
+    builder->create_store(bLoad, aAlloca);
+    auto tempLoad = builder->create_load(tempAlloca);
+    builder->create_store(tempLoad, bAlloca);
+    // 创建强制跳转指令，跳转至 falseBB，注意每个 BasicBlock 都需要有终结指令
+    builder->create_br(falseBB);
+    // 将 builder 插入指令的位置调整至 falseBB 上
+    builder->set_insert_point(falseBB);
+    // 用 builder 创建两条 load 指令将 a 与 b 的值 load 出来
+    aLoad = builder->create_load(aAlloca);
+    bLoad = builder->create_load(bAlloca);
+    // 用 builder 创建 call 指令，调用 gcd 函数，并将 ab load 的结果作为实参传入
+    call = builder->create_call(gcdFun, {aLoad, bLoad});
+    // 使用 builder 创建了一条 ret 指令，将 gcd 返回值 load 出来的结果作为 gcd
+    // 函数的返回值返回
+    builder->create_ret(call);
+    // 接下来创建 main 函数
+    auto mainFun =
+        Function::create(FunctionType::get(Int32Type, {}), "main", module);
+    // 创建 main 函数的起始 bb
+    bb = BasicBlock::create(module, "entry", mainFun);
+    // 将 builder 插入指令的位置调整至 main 函数起始 bb 上
+    builder->set_insert_point(bb);
+    // 用 builder 创建 alloca 指令，为函数返回值分配空间
+    retAlloca = builder->create_alloca(Int32Type);
+    // main 函数默认 ret 0
+    builder->create_store(CONST_INT(0), retAlloca);
+    // 用 builder 创建 getelementptr 指令，参数解释：第一个参数传入
+    // getelementptr 的指针参数，第二个参数传入取偏移的数组。在此条语句中，x 为
+    // [1 x i32]*类型的指针，取两次偏移，两次偏移值都为 0，因此返回的即为 x[0]
+    // 的地址。
+    auto x0GEP = builder->create_gep(x, {CONST_INT(0), CONST_INT(0)});
+    // 用 builder 创建 store 指令，将 90 常数值存至上条语句取出的 x[0] 的地址
+    builder->create_store(CONST_INT(90), x0GEP);
+    // 此处同上创建 getelementptr 指令，返回 y[0] 的地址
+    auto y0GEP = builder->create_gep(y, {CONST_INT(0), CONST_INT(0)});
+    // 用 builder 创建 store 指令，将 18 常数值存至上条语句取出的 y[0] 的地址
+    builder->create_store(CONST_INT(18), y0GEP);
+    // 此处同上创建 getelementptr 指令，返回 x[0] 的地址
+    x0GEP = builder->create_gep(x, {CONST_INT(0), CONST_INT(0)});
+    // 此处同上创建 getelementptr 指令，返回 y[0] 的地址
+    y0GEP = builder->create_gep(y, {CONST_INT(0), CONST_INT(0)});
+    // 此处创建 call 指令，调用 funArray 函数，将上两条语句返回的 x[0]，y[0]
+    // 的地址作为实参
+    call = builder->create_call(funArrayFun, {x0GEP, y0GEP});
+    // 使用 builder 创建了一条 ret 指令，将 funArray 返回值 load 出来的结果作为
+    // main 函数的返回值返回
+    builder->create_ret(call);
+    // 输出 module 中的所有 IR 指令
+    std::cout << module->print();
+    delete module;
+    return 0;
+}
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
new file mode 100644
index 0000000..ca25a59
--- /dev/null
+++ b/tests/CMakeLists.txt
@@ -0,0 +1 @@
+add_subdirectory("2-ir-gen/warmup")
\ No newline at end of file
diff --git a/tests/testcases_general/1-return.cminus b/tests/testcases_general/1-return.cminus
new file mode 100644
index 0000000..464e22a
--- /dev/null
+++ b/tests/testcases_general/1-return.cminus
@@ -0,0 +1 @@
+void main(void) { return; }
diff --git a/tests/testcases_general/1-return.out b/tests/testcases_general/1-return.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/1-return.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/10-funcall.cminus b/tests/testcases_general/10-funcall.cminus
new file mode 100644
index 0000000..858c516
--- /dev/null
+++ b/tests/testcases_general/10-funcall.cminus
@@ -0,0 +1,10 @@
+void test(int a) {
+    return;
+}
+
+void main(void) {
+    int a;
+    a = 10;
+    test(a);
+    return;
+}
diff --git a/tests/testcases_general/10-funcall.out b/tests/testcases_general/10-funcall.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/10-funcall.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/11-funcall_chain.cminus b/tests/testcases_general/11-funcall_chain.cminus
new file mode 100644
index 0000000..be23aab
--- /dev/null
+++ b/tests/testcases_general/11-funcall_chain.cminus
@@ -0,0 +1,6 @@
+int addone(int a) { return a + 1; }
+int main(void) {
+    int result;
+    result = addone(addone(addone(addone(1230))));
+    return result;
+}
diff --git a/tests/testcases_general/11-funcall_chain.out b/tests/testcases_general/11-funcall_chain.out
new file mode 100644
index 0000000..cd7da05
--- /dev/null
+++ b/tests/testcases_general/11-funcall_chain.out
@@ -0,0 +1 @@
+210
diff --git a/tests/testcases_general/12-funcall_recursion.cminus b/tests/testcases_general/12-funcall_recursion.cminus
new file mode 100644
index 0000000..3f7b733
--- /dev/null
+++ b/tests/testcases_general/12-funcall_recursion.cminus
@@ -0,0 +1,11 @@
+int factorial(int a) { 
+    if(a==0) 
+        return 1;
+    else
+        return a*factorial(a-1); 
+}
+int main(void) {
+    int result;
+    result = factorial(10);
+    return result;
+}
diff --git a/tests/testcases_general/12-funcall_recursion.out b/tests/testcases_general/12-funcall_recursion.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/12-funcall_recursion.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/13-if_stmt.cminus b/tests/testcases_general/13-if_stmt.cminus
new file mode 100644
index 0000000..bb4a607
--- /dev/null
+++ b/tests/testcases_general/13-if_stmt.cminus
@@ -0,0 +1,8 @@
+void main(void) {
+    int a;
+    a = 2;
+    if (a)
+        a = 3;
+    a = 4;
+    return;
+}
diff --git a/tests/testcases_general/13-if_stmt.out b/tests/testcases_general/13-if_stmt.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/13-if_stmt.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/14-while_stmt.cminus b/tests/testcases_general/14-while_stmt.cminus
new file mode 100644
index 0000000..0fdd811
--- /dev/null
+++ b/tests/testcases_general/14-while_stmt.cminus
@@ -0,0 +1,8 @@
+void main(void) {
+    int i;
+    i = 10;
+    while (i) {
+        i = i - 1;
+    }
+    return;
+}
diff --git a/tests/testcases_general/14-while_stmt.out b/tests/testcases_general/14-while_stmt.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/14-while_stmt.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/15-if_while.cminus b/tests/testcases_general/15-if_while.cminus
new file mode 100644
index 0000000..34dfc7a
--- /dev/null
+++ b/tests/testcases_general/15-if_while.cminus
@@ -0,0 +1,17 @@
+int main(void) {
+    int i;
+    int a;
+    int b;
+    a = 0;
+    b = 0;
+    i = 10;
+    while (i) {
+        i = i - 1;
+        if (i < 5)
+            a = a + i;
+        else {
+            b = b + i;
+        }
+    }
+    return a + b;
+}
diff --git a/tests/testcases_general/15-if_while.out b/tests/testcases_general/15-if_while.out
new file mode 100644
index 0000000..ea90ee3
--- /dev/null
+++ b/tests/testcases_general/15-if_while.out
@@ -0,0 +1 @@
+45
diff --git a/tests/testcases_general/16-if_chain.cminus b/tests/testcases_general/16-if_chain.cminus
new file mode 100644
index 0000000..a7c2358
--- /dev/null
+++ b/tests/testcases_general/16-if_chain.cminus
@@ -0,0 +1,14 @@
+int main(void) {
+    int a;
+    int b;
+    int c;
+    c = 0;
+    a = 2;
+    b = 1;
+    if (b) 
+        if (c)
+            a = 4;
+        else 
+            a = 3;
+    return a;
+}
diff --git a/tests/testcases_general/16-if_chain.out b/tests/testcases_general/16-if_chain.out
new file mode 100644
index 0000000..00750ed
--- /dev/null
+++ b/tests/testcases_general/16-if_chain.out
@@ -0,0 +1 @@
+3
diff --git a/tests/testcases_general/17-while_chain.cminus b/tests/testcases_general/17-while_chain.cminus
new file mode 100644
index 0000000..4eafefd
--- /dev/null
+++ b/tests/testcases_general/17-while_chain.cminus
@@ -0,0 +1,13 @@
+int main(void) {
+    int i;
+    int j;
+    i = 10;
+    while (i) {
+        i = i - 1;
+        j = i;
+        while(j) {
+            j = j - 1;
+        }
+    }
+    return i + j;
+}
\ No newline at end of file
diff --git a/tests/testcases_general/17-while_chain.out b/tests/testcases_general/17-while_chain.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/17-while_chain.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/18-global_var.cminus b/tests/testcases_general/18-global_var.cminus
new file mode 100644
index 0000000..cec0e56
--- /dev/null
+++ b/tests/testcases_general/18-global_var.cminus
@@ -0,0 +1,5 @@
+int a;
+int main(void) {
+    a = 10;
+    return a;
+}
\ No newline at end of file
diff --git a/tests/testcases_general/18-global_var.out b/tests/testcases_general/18-global_var.out
new file mode 100644
index 0000000..f599e28
--- /dev/null
+++ b/tests/testcases_general/18-global_var.out
@@ -0,0 +1 @@
+10
diff --git a/tests/testcases_general/19-global_local_var.cminus b/tests/testcases_general/19-global_local_var.cminus
new file mode 100644
index 0000000..0622143
--- /dev/null
+++ b/tests/testcases_general/19-global_local_var.cminus
@@ -0,0 +1,11 @@
+int a;
+void GlobalAssign(void) {
+    a = 10;
+    return;
+}
+int main(void) {
+    int a;
+    GlobalAssign();
+    a = 20;
+    return a;
+}
diff --git a/tests/testcases_general/19-global_local_var.out b/tests/testcases_general/19-global_local_var.out
new file mode 100644
index 0000000..209e3ef
--- /dev/null
+++ b/tests/testcases_general/19-global_local_var.out
@@ -0,0 +1 @@
+20
diff --git a/tests/testcases_general/2-decl_int.cminus b/tests/testcases_general/2-decl_int.cminus
new file mode 100644
index 0000000..b4f1e34
--- /dev/null
+++ b/tests/testcases_general/2-decl_int.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    int a;
+    return;
+}
diff --git a/tests/testcases_general/2-decl_int.out b/tests/testcases_general/2-decl_int.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/2-decl_int.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/20-gcd_array.cminus b/tests/testcases_general/20-gcd_array.cminus
new file mode 100644
index 0000000..033ccba
--- /dev/null
+++ b/tests/testcases_general/20-gcd_array.cminus
@@ -0,0 +1,29 @@
+int x[1];
+int y[1];
+
+int gcd(int u, int v) {
+    if (v == 0)
+        return u;
+    else
+        return gcd(v, u - u / v * v);
+}
+
+int funArray(int u[], int v[]) {
+    int a;
+    int b;
+    int temp;
+    a = u[0];
+    b = v[0];
+    if (a < b) {
+        temp = a;
+        a = b;
+        b = temp;
+    }
+    return gcd(a, b);
+}
+
+int main(void) {
+    x[0] = 90;
+    y[0] = 18;
+    return funArray(x, y);
+}
\ No newline at end of file
diff --git a/tests/testcases_general/20-gcd_array.out b/tests/testcases_general/20-gcd_array.out
new file mode 100644
index 0000000..3c03207
--- /dev/null
+++ b/tests/testcases_general/20-gcd_array.out
@@ -0,0 +1 @@
+18
diff --git a/tests/testcases_general/21-comment.cminus b/tests/testcases_general/21-comment.cminus
new file mode 100644
index 0000000..63d6e02
--- /dev/null
+++ b/tests/testcases_general/21-comment.cminus
@@ -0,0 +1,2 @@
+/*this is comment*/
+void main(void) { return; }
\ No newline at end of file
diff --git a/tests/testcases_general/21-comment.out b/tests/testcases_general/21-comment.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/21-comment.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/3-decl_float.cminus b/tests/testcases_general/3-decl_float.cminus
new file mode 100644
index 0000000..61949df
--- /dev/null
+++ b/tests/testcases_general/3-decl_float.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    float a;
+    return;
+}
diff --git a/tests/testcases_general/3-decl_float.out b/tests/testcases_general/3-decl_float.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/3-decl_float.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/4-decl_int_array.cminus b/tests/testcases_general/4-decl_int_array.cminus
new file mode 100644
index 0000000..249926a
--- /dev/null
+++ b/tests/testcases_general/4-decl_int_array.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    int a[10];
+    return;
+}
diff --git a/tests/testcases_general/4-decl_int_array.out b/tests/testcases_general/4-decl_int_array.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/4-decl_int_array.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/5-decl_float_array.cminus b/tests/testcases_general/5-decl_float_array.cminus
new file mode 100644
index 0000000..bd28952
--- /dev/null
+++ b/tests/testcases_general/5-decl_float_array.cminus
@@ -0,0 +1,4 @@
+void main(void) {
+    float a[10];
+    return;
+}
diff --git a/tests/testcases_general/5-decl_float_array.out b/tests/testcases_general/5-decl_float_array.out
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/tests/testcases_general/5-decl_float_array.out
@@ -0,0 +1 @@
+0
diff --git a/tests/testcases_general/6-num_add_int.cminus b/tests/testcases_general/6-num_add_int.cminus
new file mode 100644
index 0000000..f049553
--- /dev/null
+++ b/tests/testcases_general/6-num_add_int.cminus
@@ -0,0 +1,5 @@
+int main(void) {
+    int a;
+    a = 1000 + 234;
+    return a;
+}
diff --git a/tests/testcases_general/6-num_add_int.out b/tests/testcases_general/6-num_add_int.out
new file mode 100644
index 0000000..cd7da05
--- /dev/null
+++ b/tests/testcases_general/6-num_add_int.out
@@ -0,0 +1 @@
+210
diff --git a/tests/testcases_general/7-assign_int_var_local.cminus b/tests/testcases_general/7-assign_int_var_local.cminus
new file mode 100644
index 0000000..907fadd
--- /dev/null
+++ b/tests/testcases_general/7-assign_int_var_local.cminus
@@ -0,0 +1,5 @@
+int main(void) {
+    int a;
+    a = 1234;
+    return a;
+}
diff --git a/tests/testcases_general/7-assign_int_var_local.out b/tests/testcases_general/7-assign_int_var_local.out
new file mode 100644
index 0000000..cd7da05
--- /dev/null
+++ b/tests/testcases_general/7-assign_int_var_local.out
@@ -0,0 +1 @@
+210
diff --git a/tests/testcases_general/8-assign_int_array_local.cminus b/tests/testcases_general/8-assign_int_array_local.cminus
new file mode 100644
index 0000000..f8c64da
--- /dev/null
+++ b/tests/testcases_general/8-assign_int_array_local.cminus
@@ -0,0 +1,5 @@
+int main(void) {
+    int a[10];
+    a[3] = 1234;
+    return a[3];
+}
diff --git a/tests/testcases_general/8-assign_int_array_local.out b/tests/testcases_general/8-assign_int_array_local.out
new file mode 100644
index 0000000..cd7da05
--- /dev/null
+++ b/tests/testcases_general/8-assign_int_array_local.out
@@ -0,0 +1 @@
+210
diff --git a/tests/testcases_general/9-assign_cast.cminus b/tests/testcases_general/9-assign_cast.cminus
new file mode 100644
index 0000000..b463e38
--- /dev/null
+++ b/tests/testcases_general/9-assign_cast.cminus
@@ -0,0 +1,7 @@
+int main(void) {
+    int a;
+    int b;
+    a = 1 < 3;
+    b = 2 + 2.4;
+    return a + b;
+}
diff --git a/tests/testcases_general/9-assign_cast.out b/tests/testcases_general/9-assign_cast.out
new file mode 100644
index 0000000..7ed6ff8
--- /dev/null
+++ b/tests/testcases_general/9-assign_cast.out
@@ -0,0 +1 @@
+5
diff --git a/tests/testcases_general/README.md b/tests/testcases_general/README.md
new file mode 100644
index 0000000..4bd99bb
--- /dev/null
+++ b/tests/testcases_general/README.md
@@ -0,0 +1,22 @@
+| case name | 语法特性 |
+|  ----  | ----  |
+| 1-return.cminus | base case |
+| 2-decl_int.cminus | int变量声明 |
+| 3-decl_float.cminus | float变量声明 |
+| 4-decl_int_array.cminus | int数组变量声明 |
+| 5-decl_float_array.cminus | float数组变量声明 |
+| 6-num_add_int.cminus | 加法运算 |
+| 7-assign_int_var_local.cminus | 赋值语句 |
+| 8-assign_int_array_local.cminus | 数组赋值语句 |
+| 9-assign_cast.cminus | 类型转换情况 |
+| 10-funcall.cminus | 函数调用 |
+| 11-funcall_chain.cminus | 函数嵌套调用 |
+| 12-funcall_recursion.cminus | 函数递归 |
+| 13-if_stmt.cminus | if选择语句 |
+| 14-while_stmt.cminus | while循环语句 |
+| 15-if_while.cminus | if与while语句嵌套 |
+| 16-if_recursion.cminus | if嵌套 |
+| 17-while_recursion.cminus | while嵌套 |
+| 18-global_var.cminus | 全局变量 |
+| 19-global_local_var.cminus | 全局变量与局部变量重名 |
+| 20-gcd_array.cminus | 稍微复杂一些的case |
\ No newline at end of file
-- 
GitLab