在C++中使用tr1實現functor/函數指標/成員函數指標

1.需要標頭檔#include <functional>

2.定義functor變數 :

std::tr1::function< T* (P1*, P2*) > DpdCreateT;

BCB可以先typedef一下函式宣告

typedef T* (Delegate)(P1*, P2*);

std::tr1::function< Delegate > DpdCreateT;

 

3.串連:

類函數

xx.DpdCreateT = std::tr1::bind(

　　& ZZZ::CreateConnection,  //類函數地址

　　& instance, // 對象執行個體地址 

　　std::tr1::placeholders::_1, // 參數1預留位置 

　　std::tr1::placeholders::_2 // 參數1預留位置

);

全域函數,直接賦值即可

xx.DpdCreateT = GlobalCreateFunction;

 

 //------------------------------------------------------------------------------

簡單函數指標

typedef void (*FooPtr)(int, double);

void Foo(int anInt, double aDouble)
{
 std::cout<<"Foo() = "<<anInt<<", "<<aDouble<<endl;  
}

FooPtr func = &Foo;
(*func)( 1, 2.0 );

 //------------------------------------------------------------------------------

成員函數指標

typedef int (SomeClass::*MemberFooPtr)(int, double);

MemberFooPtr p;

SomeClass sc;

p = &SomeClass::Foo;
(sc.*p)(1, 2); 

 

//-------------------------------------------------------------------------------

VS 2008中

#include <functional>

定義:

typedef void (SetFrameValueActionDelegate)(T*, V frameValue);
std::tr1::function<SetFrameValueActionDelegate> SetFrameValueAction;

 

綁定:

mWeekViewGroupLocationAnimation.SetFrameValueAction
 = std::tr1::bind( &MyClass::mWeekViewGroup_LocationAnimation_SetFrameValue,
      &mRenderGroupWeekView,
      std::tr1::placeholders::_2);