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std::is_member_function_pointer

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Defined in header <type_traits>
template< class T >
struct is_member_function_pointer;
 (a partir do C++ 11)
Se T é 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 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 function pointer type , false contrário
Original:
true if T is a member function 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
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_function_pointer_helper : std::false_type {};
 
template< class T, class U>
struct is_member_function_pointer_helper<T U::*> : std::is_function<T> {};
 
template< class T >
struct is_member_function_pointer : is_member_function_pointer_helper<
                                        typename std::remove_cv<T>::type
                                    > {};

[editar] Exemplo

#include <type_traits>
 
class A {
    void member_function() { }
};
 
// fails at compile time if A does not contain member_function as a function.
 
static_assert<std::is_member_function_pointer<decltype(&A::member_function)>::value,
                      "Class does not contain member.");


[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)
 checks if a type is a pointer to a non-static member function or object
(modelo de classe) [edit]
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