C++Builder中__closure关键字的用法

最近在用C++Builder时，想要将对象1的成员函数指针赋给对象2的成员变量，然后在对象2内通过该成员变量访问对象1的成员函数。貌似标准的C++不支持这样的操作，但是C++Builder提供了__closure关键字，感觉还挺好用的，测试代码如下：

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// Unit1.h //--------------------------------------------------------------------------- class Test1 { private:   int m_Add;   public:   __fastcall Test1(int Add) {     m_Add = Add;   };   virtual __fastcall ~Test1() {};     int __fastcall TestFunction1(int param1);   void __fastcall Test11(); };   //--------------------------------------------------------------------------- class Test2 { public:   __fastcall Test2() {};   virtual __fastcall ~Test2() {};     int __fastcall(__closure *TestFunction2)(int param1);   void __fastcall Test22(); };

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// Unit1.cpp //--------------------------------------------------------------------------- int __fastcall Test1::TestFunction1(int param1) {   return param1 + m_Add; }   //--------------------------------------------------------------------------- void __fastcall Test1::Test11() {   Test2 *test2 = new Test2();   test2->TestFunction2 = &TestFunction1;   test2->Test22();   delete test2; };   //--------------------------------------------------------------------------- void __fastcall Test2::Test22() {   printf("Result: %d", TestFunction2(1)); }

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// main.cpp //--------------------------------------------------------------------------- int _tmain(int argc, _TCHAR* argv[]) {   Test1 *test = new Test1(1);   test->Test11();   delete test;   getchar();   return 0; }