std::is_rvalue_reference

 

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Operadores relacionales Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

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Tipos básicos 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.
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ptrdiff_t size_t max_align_t (C++11)	nullptr_t (C++11) offsetof NULL
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is_rvalue_reference (C++11)
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is_copy_constructible is_trivially_copy_constructible is_nothrow_copy_constructible (C++11) (C++11) (C++11)
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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)
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Escriba constantes rasgos 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)

 

Defined in header <type_traits>
template< class T > struct is_rvalue_reference;		(ya que C + +11)

Si T es un tipo de referencia rvalue, establece en el miembro constante value true iguales. Para cualquier otro tipo, es value false .

Original:

If T is an rvalue reference type, 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.

Inherited from std::integral_constant

Member constants

value [estático]	true si T is an rvalue reference type , false lo contrario Original: true if T is an rvalue reference 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. (público miembro constante estática)

Member functions

operator bool	convierte el objeto a bool, devuelve 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. (miembro público función)

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>

Posible implementación

template <class T> struct is_rvalue_reference : std::false_type {}; template <class T> struct is_rvalue_reference<T&&> : std::true_type {};

Ejemplo

#include <iostream>
#include <type_traits>
 
class A {};
 
int main() 
{
    std::cout << std::boolalpha;
    std::cout << std::is_rvalue_reference<A>::value << '\n';
    std::cout << std::is_rvalue_reference<A&>::value << '\n';
    std::cout << std::is_rvalue_reference<A&&>::value << '\n';
    std::cout << std::is_rvalue_reference<int>::value << '\n';
    std::cout << std::is_rvalue_reference<int&>::value << '\n';
    std::cout << std::is_rvalue_reference<int&&>::value << '\n';
}

Output:

false
false
true
false
false
true

Ver también

is_lvalue_reference (C++11)	Comprueba si un tipo es' lvalue referencia Original: checks if a type is lvalue reference The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (clase de plantilla)
is_reference (C++11)	Comprueba si un tipo está bien lvalue referencia o referencia rvalue Original: checks if a type is either lvalue reference or rvalue reference The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (clase de plantilla)