유엔아이 현 입니다.

오 창환이 공부 많이 하나 보내~~

ㅋㅋㅋ

열심히 해라~~~

수고

이창환 님이 쓰신 글 :
: 그냥 참고 하세여....(저도 초심자라서...^^;)
:
: C++ Builder에는 __closure라는 것이 있더군여...
:
: 이걸 써 보세여...
:
: 하여튼 예를 만들어 보았습니다.
:
: 설명은 밑에 도움말을 캡쳐해서 올립니다..(좋은 내용 같음....ㅠㅠ)
: 
: __closure
:
: The __closure keyword is used to declare a special type of pointer to a member function. Unlike a regular C++ member function pointer, a closure contains an object pointer.
: In standard C++, you can assign a derived class instance to a base class pointer; however, you cannot assign a derived class뭩 member function to a base class member function pointer. The following code illustrates this:
:
: class base
:
: {
:   public:
:     void func(int x);
: };
:
: class derived: public base
:
: {
:   public:
:     void new_func(int i);
: };
:
: void (base::*bptr)(int);
:
: bptr = &derived::new_func;    // illegal
:
: However, the __closure language extension allows you to do this in C++Builder. A closure associates a pointer to a member function with a pointer to a class instance. The pointer to the class instance is used as the this pointer when calling the associated member function. A closure declaration is the same as a function pointer declaration but with the addition of the __closure keyword before the identifier being defined. For example:
:
: struct MyObject
:
: {
:   double MemFunc(int);
: };
:
: double func1(MyObject *obj)
:
: {
:   // A closure taking an int argument and returning double.
:   double ( __closure *myClosure )(int);
:
:   // Initialize the closure.
:
:   myClosure = obj -> MemFunc;
:
:   // Use the closure to call the member function and pass it an int.
:
:   return myClosure(1);
: }
:
: Although the preceding discussion illustrates closures by assigning descendant class methods, you can assign any class method pointer to a closure. That is, closures allow completely disparate classes to share a method pointer.
: Closures are used with events in C++Builder.