std::is_volatile - cppreference.com

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Definido no cabeçalho `<type_traits>`

`template< class T > struct is_volatile;`		(desde C++11)

Se T é um tipo volátil-qualificado (isto é, volatile ou const volatile), fornece o membro constante value true igual. Para qualquer outro tipo, é value false.

Original:

If T is a volatile-qualified type (that is, volatile, or const volatile), provides the member constant value equal true. For any other type, value is false.

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Herdado de std::integral_constant

Member constants


	`true` se `T` is a volatile-qualified type , `false` contrário Original: `true` if `T` is a volatile-qualified 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. (membro estático público constante)

Member functions


	converte o objeto em `bool`, retorna `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. (função pública membro)

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>`

Possível implementação

template<class T> struct is_volatile             : std::false_type {};
template<class T> struct is_volatile<volatile T> : std::true_type {};

Exemplo

#include <iostream>
#include <type_traits>

int main() 
{
    std::cout << boolalpha;
    std::cout << std::is_volatile<int>::value << '\n';
    std::cout << std::is_volatile<volatile int>::value  << '\n';
}

Saída:

Veja também


	verifica se um tipo é const qualificado Original: checks if a type is const-qualified The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de classe) [edit]