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std::is_member_object_pointer

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Soutien aux types fondamentaux
Les types de base
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Basic types
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Types fondamentaux
Fixe les types entiers largeur (C++11)
Limites numériques
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Numeric limits
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numeric_limits
C numérique limite interface
Informations sur le type d'exécution
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Runtime type information
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Caractères de type
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Type traits
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Catégories de type primaire
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Primary type categories
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is_void (C++11)
is_array (C++11)
is_pointer (C++11)
is_enum (C++11)
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is_class (C++11)
is_function (C++11)
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is_arithmetic (C++11)
is_reference (C++11)
is_lvalue_reference (C++11)
is_rvalue_reference (C++11)
is_member_pointer (C++11)
is_member_object_pointer (C++11)
is_member_function_pointer (C++11)
Les propriétés du type
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Type properties
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is_const (C++11)
is_volatile (C++11)
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Opérations prises en charge
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Supported operations
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is_constructible
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is_assignable
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is_copy_assignable
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is_move_assignable
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is_destructible
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(C++11)
(C++11)
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has_virtual_destructor (C++11)
Les relations et les requêtes de propriété
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Relationships and property queries
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is_same (C++11)
is_base_of (C++11)
is_convertible (C++11)
alignment_of (C++11)
rank (C++11)
extent (C++11)
Modifications de type
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Type modifications
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remove_cv
remove_const
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make_signed (C++11)
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Transformations de type
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Type transformations
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aligned_storage (C++11)
aligned_union (C++11)
decay (C++11)
enable_if (C++11)
conditional (C++11)
common_type (C++11)
underlying_type (C++11)
result_of (C++11)
Tapez constantes traits
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Type trait constants
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integral_constant (C++11)
 
Defined in header <type_traits>
template< class T >
struct is_member_object_pointer;
(depuis C++11)
Si T est un pointeur à l'objet membre non statique, fournit du membre de constante value true égale. Pour tout autre type, value est 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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Sommaire

Inherited from std::integral_constant

Member constants

value
[
statique
Original:
static
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]
true si T is a pointer to member object , false autrement
Original:
true if T is a pointer to member object , false otherwise
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(constante membre statique publique)

Member functions

operator bool
convertit l'objet en bool, retourne value
Original:
converts the object to bool, returns value
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(fonction membre publique)

Member types

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

[modifier] Mise en œuvre possible

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
                                  > {};

[modifier] Exemple

#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';
}

Résultat :

T is member object pointer
T is not a member object pointer

[modifier] Voir aussi

(C++11)
vérifie si un type est un type pointeur
Original:
checks if a type is a pointer type
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(classe générique) [edit]
vérifie si un type est un pointeur vers une fonction membre non statique ou d'un objet
Original:
checks if a type is a pointer to a non-static member function or object
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(classe générique) [edit]
vérifie si un type est un pointeur vers une fonction membre non statique
Original:
checks if a type is a pointer to a non-static member function
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(classe générique) [edit]