FrontendAction自定义返回值

本段代码给出了一个如何在clang中实现FrontendAction返回一个自己需要的返回值的例子

class MyFrontendAction : public ASTFrontendAction
{
public:

    MyFrontendAction(ReturnClass* return) {
        result = return;
    }
    void EndSourceFileAction() override;

    std::unique_ptr CreateASTConsumer(CompilerInstance& CI, StringRef file) override;
private:
    ReturnClass* result ;
};

std::unique_ptr MyFrontendAction::CreateASTConsumer(CompilerInstance& CI, StringRef file)
{
    cur_callgraph = nullptr;
    return std::make_unique(file);
}

// 在处理单个输入结束时回调
void MyFrontendAction::EndSourceFileAction() {
    //getCompilerInstance().getASTConsumer()...
    //result = ...;
}

class MyFrontendActionFactory :public FrontendActionFactory {
public:
    MyFrontendActionFactory(FrontendAction* frontAct) {
        act = frontAct;
    }

    std::unique_ptr create() override {
        return std::unique_ptr(act);
    }
private:
    FrontendAction* act;
};


int run(ClangTool tool){
    ReturnClass* return;
    std::unique_ptr myActPtr(new MyFrontendAction(return));

    std::unique_ptr myActFactoryPtr(new CFGFrontendActionFactory(myActPtr.get()));

    int re = tool.run(myActFactoryPtr.get());

    myActFactoryPtr.release();
    myActPtr.release();

    return re;
}