我试图建立一个小程序libclang它检索特定函数调用的函数/方法的定义。找到与Clang的特定函数调用的函数定义
举例来说,我有以下main.cpp
:
int add(int x, int y)
{
return x + y;
}
int main()
{
int a = 1;
int b = 1;
int c = add(a, b);
return 0;
}
我想打电话给我的程序在这样的方式:
./find_definition main.cpp add
,我想它返回:
Definition of add in main.cpp:1 - int add(int x, int y)
我读过this SO问题clang_getCursorUSR()
可能会帮助我到目前为止,我已经得到了代码:
#include <clang-c/Index.h>
#include <iostream>
#include <string>
CXChildVisitResult visitor(CXCursor cursor, CXCursor /* parent */, CXClientData clientData)
{
CXSourceLocation location = clang_getCursorLocation(cursor);
if(clang_Location_isFromMainFile(location) == 0)
{
// Continue the cursor traversal with the next sibling of the cursor just visited, without visiting its children.
return CXChildVisit_Continue;
}
CXCursorKind cursorKind = clang_getCursorKind(cursor);
CXString cursorSpelling = clang_getCursorSpelling(cursor);
if (cursorKind == CXCursor_CallExpr && clang_getCString(cursorSpelling) == "add") {
CXString cursorUsr = clang_getCursorUSR(cursor);
std::cout << "Cursor USR is " << clang_getCString(cursorUsr) << std::endl;
clang_disposeString(cursorUsr);
}
clang_disposeString(cursorSpelling);
// Visit children nodes
unsigned int curLevel = *(reinterpret_cast<unsigned int*>(clientData));
unsigned int nextLevel = curLevel + 1;
clang_visitChildren(cursor, visitor, &nextLevel);
return CXChildVisit_Continue;
}
int main(int argc, char** argv)
{
if(argc < 2)
return -1;
CXIndex index = clang_createIndex(0, 1);
CXTranslationUnit tu = clang_createTranslationUnitFromSourceFile(index, argv[1], 0, 0, 0, 0);
if(!tu)
{
std::cout << "TU not found! Aborting...";
return -1;
}
CXCursor rootCursor = clang_getTranslationUnitCursor(tu);
unsigned int treeLevel = 0;
clang_visitChildren(rootCursor, visitor, &treeLevel);
clang_disposeTranslationUnit(tu);
clang_disposeIndex(index);
return 0;
}
当我运行它在我的main.cpp
,只打印:
Cursor USR is
,但我没有得到任何额外的信息。
对我来说这似乎是一种矫枉过正,智能正则表达式不会捕获任何(也是唯一的)函数定义吗?我知道C++不是普通的语言,但在这种情况下,它可能是一种方式。 –
在这个简单的例子中,正则表达式可能会做,但我实际上必须在更大的代码库上使用它,并在稍后与函数定义进行交互,所以我想我被迫使用* libclang * – filaton