Espaces de noms
Variantes
Affichages
Actions

std::is_void

De cppreference.com
< cpp‎ | types

This page has been machine-translated from the English version of the wiki using Google Translate.

The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here.

Click here for the English version of this page

 
C++
 
Bibliothèque d'utilitaires
 
Soutien aux types fondamentaux
Les types de base
Original:
Basic types
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Types fondamentaux
Fixe les types entiers largeur (C++11)
Limites numériques
Original:
Numeric limits
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
numeric_limits
C numérique limite interface
Informations sur le type d'exécution
Original:
Runtime type information
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Caractères de type
Original:
Type traits
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Catégories de type primaire
Original:
Primary type categories
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
is_void (C++11)
is_array (C++11)
is_pointer (C++11)
is_enum (C++11)
is_union (C++11)
is_class (C++11)
is_function (C++11)
is_object (C++11)
is_scalar (C++11)
is_compound (C++11)
is_integral (C++11)
is_floating_point (C++11)
is_fundamental (C++11)
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
Original:
Type properties
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
is_const (C++11)
is_volatile (C++11)
is_pod (C++11)
is_empty (C++11)
is_polymorphic (C++11)
is_abstract (C++11)
Opérations prises en charge
Original:
Supported operations
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
is_constructible
is_trivially_constructible
is_nothrow_constructible		 (C++11)
(C++11)
(C++11)
is_default_constructible
is_trivially_default_constructible
is_nothrow_default_constructible		 (C++11)
(C++11)
(C++11)
is_copy_constructible
is_trivially_copy_constructible
is_nothrow_copy_constructible		 (C++11)
(C++11)
(C++11)
is_move_constructible
is_trivially_move_constructible
is_nothrow_move_constructible		 (C++11)
(C++11)
(C++11)
is_assignable
is_trivially_assignable
is_nothrow_assignable		 (C++11)
(C++11)
(C++11)
is_copy_assignable
is_trivially_copy_assignable
is_nothrow_copy_assignable		 (C++11)
(C++11)
(C++11)
is_move_assignable
is_trivially_move_assignable
is_nothrow_move_assignable		 (C++11)
(C++11)
(C++11)
is_destructible
is_trivially_destructible
is_nothrow_destructible		 (C++11)
(C++11)
(C++11)
has_virtual_destructor (C++11)
Les relations et les requêtes de propriété
Original:
Relationships and property queries
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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
Original:
Type modifications
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
remove_cv
remove_const
remove_volatile		 (C++11)
(C++11)
(C++11)
add_cv
add_const
add_volatile		 (C++11)
(C++11)
(C++11)
make_signed (C++11)
make_unsigned (C++11)
Transformations de type
Original:
Type transformations
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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
Original:
Type trait constants
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
integral_constant (C++11)
 
Déclaré dans l'en-tête <type_traits>
template< class T >
struct is_void;
 (depuis C++11)
Si T est le type void, const void, volatile void ou const volatile void, fournit du membre de constante value true égale. Pour tout autre type, value est false .
Original:
If T is the type void, const void, volatile void, or const volatile void, provides the member constant value equal true. For any other type, value is false.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Sommaire

Inherited from std::integral_constant

Member constants

value
[
statique
Original:
static
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
]
true si T is the type void (possibly cv-qualified) , false autrement
Original:
true if T is the type void (possibly cv-qualified) , false otherwise
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(constante membre statique publique)

Member functions

operator bool
convertit l'objet en bool, retourne 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.

(fonction membre publique)

Member types

Type d'
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>

[modifier] Mise en œuvre possible

template< class T >
struct is_void : std::integral_constant<
                     bool,
                     std::is_same<void, typename std::remove_cv<T>::type>::value
                  > {};

[modifier] Exemple

#include <iostream>
#include <type_traits>
 
int main() 
{
    std::cout << std::boolalpha;
    std::cout << std::is_void<void>::value << '\n';
    std::cout << std::is_void<int>::value << '\n';
}

Résultat : 

true
false

[modifier] Voir aussi

(C++11)
vérifie si un type est un type tableau
Original:
checks if a type is an array type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(classe générique) [edit]
(C++11)
vérifie si un type est un type pointeur
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 générique) [edit]
(C++11)
vérifie si un type est un type d'énumération
Original:
checks if a type is an enumeration type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(classe générique) [edit]
(C++11)
vérifie si un type est un type d'union
Original:
checks if a type is an union type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(classe générique) [edit]
(C++11)
 checks if a type is a class type (but not union type)
(classe générique) [edit]
(C++11)
vérifie si un type est un type de fonction
Original:
checks if a type is a function type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(classe générique) [edit]
(C++11)
vérifie si un type est le type d'objet
Original:
checks if a type is object type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(classe générique) [edit]
Récupérée de « https://fr.cppreference.com/mwiki/index.php?title=cpp/types/is_void&oldid=49620 »