#include "iostream.h"
class MyClass
{
private:
int t;
public:
void MyFunc( void ){ cout << "HI"; }
};
void main( void )
{
void (MyClass:: *pFunc)( void );
pFunc = MyClass::MyFunc;
}
Classes...
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that code really doesn''t do anything. pointers to class functions (also called "methods") are rarely used and ugly, i dont know why. only static methods can be called without an object, so you can''t do anything with that fuction unless you create an instance of the class.
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not totally true there is an operator to call a member function of an object :
Now that was ugly!!!! But he C++ standard provides with a nice object to hide all the uglyness, it is called mem_funt_t
the next piece of code does exactly has above
mem_fun_t is very usefull for doing callbacks to objects.
Edited by - Gorg on February 5, 2002 2:14:56 AM
class A{ void Test();};typedef void (A::*A_FUNCTION(void));A a;A* aPtr;A_FUNCTION func = &A::Test;//calling with instance see the little . before the *a.*func();//calling with a pointera->*func(); Now that was ugly!!!! But he C++ standard provides with a nice object to hide all the uglyness, it is called mem_funt_t
the next piece of code does exactly has above
#include <functionnal>std::mem_fun_t function( &A::Test );A a;function(&a); mem_fun_t is very usefull for doing callbacks to objects.
Edited by - Gorg on February 5, 2002 2:14:56 AM
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