std::is_member_function_pointer - cppreference.com

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Elemento definito nell'header `<type_traits>`

`template< class T > struct is_member_function_pointer;`		(dal C++11)

Se T è puntatore a funzione non statica membro, fornisce l'elemento costante value true uguali. Per qualsiasi altro tipo, è 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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Inherited from std::integral_constant

Member constants


	`true` se `T` is a member function pointer type , `false` altrimenti Original: `true` if `T` is a member function pointer type , `false` otherwise The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (pubblico membro statico costante)

Member functions


	converte l'oggetto in `bool`, restituisce `value` Original: converts the object to `bool`, returns `value` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)

Member types


Tipo Original: Type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition

`value_type`	`bool`

`type`	`std::integral_constant<bool, value>`

Possibile implementazione

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
                                    > {};

Esempio

#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.");

Vedi anche


is_pointer (C++11)	Verifica se un tipo è un tipo di puntatore Original: checks if a type is a pointer type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe template) [modifica]

is_member_object_pointer (C++11)	Verifica se un tipo è un puntatore ad una non statico oggetto membro Original: checks if a type is a pointer to a non-static member object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (classe template) [modifica]

is_member_pointer (C++11)	checks if a type is a pointer to a non-static member function or object (classe template) [modifica]