std::is_same — cppreference.com

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Déclaré dans l'en-tête `<type_traits>`
`template< class T, class U > struct is_same;`		(depuis C++11)

Si T et le nom U du même type avec les mêmes qualifications const volatile, fournit du membre de constante égale à value true. Sinon value est false .

Original:

If T and U name the same type with the same const-volatile qualifications, provides the member constant value equal to true. Otherwise value is false.

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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` and `U` is the same type , `false` autrement Original: `true` if `T` and `U` is the same 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. (constante membre statique publique)

Member functions


	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>`

Mise en œuvre possible

template<class T, class U>
struct is_same : std::false_type {};

template<class T>
struct is_same<T, T> : std::true_type {};

Exemple

#include <iostream>
#include <type_traits>
#include <cstdint>

int main()
{
    std::cout << std::boolalpha;
    std::cout << std::is_same<int, int32_t>::value << '\n';
    std::cout << std::is_same<int, int64_t>::value << '\n';
    std::cout << std::is_same<float, int32_t>::value << '\n';
}

Résultat :