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std::is_member_pointer

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Defined in header <type_traits>
template< class T >
struct is_member_pointer;
 (a partir do C++ 11)
Se T é ponteiro para não-estático objeto membro ou um ponteiro para não-estático função de membro, fornece o membro constante value true igual. Para qualquer outro tipo, é value false.
Original:
If T is pointer to non-static member object or a pointer to non-static member function, provides the member constant value equal true. For any other type, value is false.
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Índice

Inherited from std::integral_constant

Member constants

value
[estática]
true se T is a member pointer type , false contrário
Original:
true if T is a member pointer type , false otherwise
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(membro estático público constante)

Member functions

operator bool
converte o objeto em bool, retorna value
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converts the object to bool, returns value
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(função pública membro)

Member types

Tipo
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Type
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 Definition
value_type bool
type std::integral_constant<bool, value>

[editar] Possível implementação

template< class T >
struct is_member_pointer_helper         : std::false_type {};
 
template< class T, class U >
struct is_member_pointer_helper<T U::*> : std::true_type {};
 
template< class T >
struct is_member_pointer : 
    is_member_pointer_helper<typename std::remove_cv<T>::type> {};

[editar] Exemplo

This section is incomplete
Reason: simplify 
#include <iostream>
#include <type_traits>
 
int main() {
    class cls {};
    std::cout << (std::is_member_pointer<int(cls::*)>::value
                     ? "T is member pointer"
                     : "T is not a member pointer") << '\n';
    std::cout << (std::is_member_pointer<int>::value
                     ? "T is member pointer"
                     : "T is not a member pointer") << '\n';
}

Output: 

T is member pointer
T is not a member pointer

[editar] Veja também

(C++11)
verifica se um tipo é um tipo de ponteiro
Original:
checks if a type is a pointer type
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(modelo de classe) [edit]
(C++11)
verifica se um tipo é um ponteiro para um objeto membro não-estático
Original:
checks if a type is a pointer to a non-static member object
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(modelo de classe) [edit]
(C++11)
verifica se um tipo é um ponteiro para uma função membro não-estático
Original:
checks if a type is a pointer to a non-static member function
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(modelo de classe) [edit]
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