使用clang LibTooling处理复杂CMake结构中的独立源文件

#include <clang/ASTMatchers/ASTMatchers.h>
#include <clang/ASTMatchers/ASTMatchFinder.h>
#include <clang/Tooling/CompilationDatabase.h>
#include <clang/Tooling/Tooling.h>

using namespace clang;
using namespace clang::ast_matchers;
using namespace clang::tooling;

DeclarationMatcher matcher = functionDecl(hasName("main"),
                                          hasDescendant(functionDecl(hasName("myFunction"))));

class MyASTConsumer : public ASTConsumer {
public:
    virtual void HandleTranslationUnit(ASTContext& context) {
        MatchFinder finder;
        finder.addMatcher(matcher, this);
        finder.matchAST(context);
    }
    
    void run(const MatchFinder::MatchResult& result) override {
        const FunctionDecl* mainFunction = result.Nodes.getNodeAs<FunctionDecl>("main");
        if (mainFunction) {
            const FunctionDecl* myFunction = result.Nodes.getNodeAs<FunctionDecl>("myFunction");
            if (myFunction) {
                // 在这里进行处理逻辑，例如修改函数名或者添加新的代码
            }
        }
    }
};

int main(int argc, const char** argv) {
    // 创建CMake编译数据库
    std::unique_ptr<CompilationDatabase> database = FixedCompilationDatabase::loadFromCommandLine(argc, argv);
    ClangTool tool(*database, database->getAllFiles());
    
    // 运行LibTooling处理逻辑
    MyASTConsumer consumer;
    tool.run(newFrontendActionFactory(&consumer).get());
    
    return 0;
}