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is_member_pointer Class

  • Article

Tests if type is a pointer to member.

template<class Ty>
    struct is_member_pointer;

Parameters

  • Ty
    The type to query.

Remarks

An instance of the type predicate holds true if the type Ty is a pointer to member function or a pointer to member object, or a cv-qualified form of one of them, otherwise it holds false.

Example

 

// std_tr1__type_traits__is_member_pointer.cpp 
// compile with: /EHsc 
#include <type_traits> 
#include <iostream> 
 
struct trivial 
    { 
    int val; 
    }; 
 
struct functional 
    { 
    int f(); 
    }; 
 
int main() 
    { 
    std::cout << "is_member_pointer<trivial *> == " 
        << std::boolalpha 
        << std::tr1::is_member_pointer<trivial *>::value 
        << std::endl; 
    std::cout << "is_member_pointer<int trivial::*> == " 
        << std::boolalpha 
        << std::tr1::is_member_pointer<int trivial::*>::value 
        << std::endl; 
    std::cout << "is_member_pointer<int (functional::*)()> == " 
        << std::boolalpha 
        << std::tr1::is_member_pointer<int (functional::*)()>::value 
        << std::endl; 
 
    return (0); 
    }

is_member_pointer<trivial *> == false is_member_pointer<int trivial::*> == true is_member_pointer<int (functional::*)()> == true

Requirements

Header: <type_traits>

Namespace: std::tr1

See Also

Reference

<type_traits>

is_member_function_pointer Class

is_member_object_pointer Class

is_pointer Class