LLVM + pythonでC++のAST生成メモ(Windows編).md

LLVM + pythonでC++のAST生成メモ(Windows編).md

URL

• http://llvm.org/svn/llvm-project/cfe/trunk/bindings/python/examples/cindex/cindex-dump.py
• http://d.hatena.ne.jp/osyo-manga/20140118/1390045795

memo

Pythonをインストール

• https://www.python.org/downloads/
• 2.7.10を使用

LLVMをダウンロード＆インストール

• http://llvm.org/releases/download.html#3.7.0
• http://llvm.org/releases/3.7.0/LLVM-3.7.0-win32.exe

clangでASTを表示するならこれでOK。

> clang.exe -Xclang -ast-dump -fsyntax-only test.cpp

PIPでclangをインストール

pip install asciitree pip install clang

tset.cpp

#include <string>
#include <iostream>

class Test {
public:
	Test() {};
	virtual void method1() {
		std::cout << "Test::method1()" << std::endl;
	};
};

int main(int argc, char *argv[])
{
	int a, b, c;
	a = 1;
	b = 2;
	c = a + b;
	
	Test *test = new Test();
	test->method1();
	delete test;
	test = NULL;
}

dump-ast.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
import clang.cindex
import pprint

def traverse(n, i=0):
  print '  ' * i,
  print n.kind,
  print " : ",
  print n.spelling,
  print
  
  for c in n.get_children():
    traverse(c, i=i+1)

def main():
  clang.cindex.Config.set_library_file('C:/Program Files (x86)/LLVM/bin/libclang.dll')
  
  index = clang.cindex.Index.create()
  translation_unit = index.parse("test.cpp", ['-x', 'c++'])
  
  traverse(translation_unit.cursor)

if __name__ == '__main__':
  main()

実行結果

> python.exe dump-ast.py test.cpp

 CursorKind.TRANSLATION_UNIT  :  test.cpp
   CursorKind.CLASS_DECL  :  Test
     CursorKind.CXX_ACCESS_SPEC_DECL  :
     CursorKind.CONSTRUCTOR  :  Test
       CursorKind.COMPOUND_STMT  :
     CursorKind.CXX_METHOD  :  method1
       CursorKind.COMPOUND_STMT  :
   CursorKind.FUNCTION_DECL  :  main
     CursorKind.PARM_DECL  :  argc
     CursorKind.PARM_DECL  :  argv
     CursorKind.COMPOUND_STMT  :
       CursorKind.DECL_STMT  :
         CursorKind.VAR_DECL  :  a
         CursorKind.VAR_DECL  :  b
         CursorKind.VAR_DECL  :  c
       CursorKind.BINARY_OPERATOR  :
         CursorKind.DECL_REF_EXPR  :  a
         CursorKind.INTEGER_LITERAL  :
       CursorKind.BINARY_OPERATOR  :
         CursorKind.DECL_REF_EXPR  :  b
         CursorKind.INTEGER_LITERAL  :
       CursorKind.BINARY_OPERATOR  :
         CursorKind.DECL_REF_EXPR  :  c
         CursorKind.BINARY_OPERATOR  :
           CursorKind.UNEXPOSED_EXPR  :  a
             CursorKind.DECL_REF_EXPR  :  a
           CursorKind.UNEXPOSED_EXPR  :  b
             CursorKind.DECL_REF_EXPR  :  b
       CursorKind.DECL_STMT  :
         CursorKind.VAR_DECL  :  test
           CursorKind.TYPE_REF  :  class Test
           CursorKind.CXX_NEW_EXPR  :
             CursorKind.TYPE_REF  :  class Test
             CursorKind.CALL_EXPR  :  Test
       CursorKind.CALL_EXPR  :  method1
         CursorKind.MEMBER_REF_EXPR  :  method1
           CursorKind.UNEXPOSED_EXPR  :  test
             CursorKind.DECL_REF_EXPR  :  test
       CursorKind.CXX_DELETE_EXPR  :
         CursorKind.UNEXPOSED_EXPR  :  test
           CursorKind.DECL_REF_EXPR  :  test