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std::is_member_function_pointer

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is_member_function_pointer
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Definido en la cabecera <type_traits>
template< class T >
struct is_member_function_pointer;
(desde C++11)
Si T es un puntero a una función miembro no estático, provee el miembro constante value true iguales. Para cualquier otro tipo, es 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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Contenido

Inherited from std::integral_constant

Member constants

value
[estático]
true si T is a member function pointer type , false lo contrario
Original:
true if T is a member function pointer type , false otherwise
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(miembro público estático constante)

Member functions

operator bool
convierte el objeto a bool, devuelve value
Original:
converts the object to bool, returns value
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(función miembro público)

Member types

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

[editar] Posible implementación

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] Ejemplo

#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] Ver también

Comprueba si un tipo es un tipo de puntero
Original:
checks if a type is a pointer type
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(plantilla de clase) [editar]
Comprueba si un tipo es un puntero a un objeto de miembro no estático
Original:
checks if a type is a pointer to a non-static member object
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(plantilla de clase) [editar]
checks if a type is a pointer to a non-static member function or object
(plantilla de clase) [editar]