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std::is_member_object_pointer

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is_member_object_pointer
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Definido no cabeçalho <type_traits>
template< class T >
struct is_member_object_pointer;
 (desde C++11)
Se T é ponteiro para não-estático objeto 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, provides the member constant value equal true. For any other type, value is false.
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Índice

Herdado de std::integral_constant

Member constants

value
[estática]
true se T is a pointer to member object , false contrário
Original:
true if T is a pointer to member object , 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
Original:
Type
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 Definition
value_type bool
type std::integral_constant<bool, value>

[editar] Possível implementação

template<class T>
struct is_member_object_pointer : std::integral_constant<
                                      bool,
                                      std::is_member_pointer<T>::value &&
                                      !std::is_member_function_pointer<T>::value
                                  > {};

[editar] Exemplo

Esta seção está incompleta
Motivo: simplify 
#include <iostream>
#include <type_traits>
 
int main() {
    class cls {};
    std::cout << (std::is_member_object_pointer<int(cls::*)>::value
                     ? "T is member object pointer"
                     : "T is not a member object pointer") << '\n';
    std::cout << (std::is_member_object_pointer<int(cls::*)()>::value
                     ? "T is member object pointer"
                     : "T is not a member object pointer") << '\n';
}

Saída: 

T is member object pointer
T is not a member object 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)
 checks if a type is a pointer to a non-static member function or object
(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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