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std::is_unsigned

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C++
 
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initializer_list(C++11)
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rel_ops::operator!=
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is_arithmetic(C++11)
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is_signed(C++11)
is_unsigned(C++11)
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is_constructible
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is_assignable
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is_nothrow_assignable		(C++11)
(C++11)
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is_copy_assignable
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(C++11)
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is_move_assignable
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is_nothrow_move_assignable		(C++11)
(C++11)
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is_destructible
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Digite constantes traço
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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_unsigned;
 (a partir do C++ 11)
Se T é um tipo de aritmética não assinado, prevê o membro constante value true igual. Para qualquer outro tipo, é value false.
Original:
If T is an unsigned arithmetic type, provides the member constant value equal true. For any other type, value is false.
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Índice

Inherited from std::integral_constant

Member constants

value
[estática]
true se T is an unsigned arithmetic type , false contrário
Original:
true if T is an unsigned arithmetic type , false otherwise
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(membro estático público constante)

Member functions

operator bool
converte o objeto em bool, retorna value
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converts the object to bool, returns value
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(função pública membro)

Member types

Tipo
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Type
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 Definition
value_type bool
type std::integral_constant<bool, value>

[editar] Exemplo

#include <iostream>
#include <type_traits>
 
class A {};
enum B : unsigned {};
enum class C : unsigned {};
 
int main() 
{
    std::cout << std::boolalpha;
    std::cout << std::is_unsigned<A>::value << '\n';
    std::cout << std::is_unsigned<float>::value << '\n';
    std::cout << std::is_unsigned<signed int>::value << '\n';
    std::cout << std::is_unsigned<unsigned int>::value << '\n';
    std::cout << std::is_unsigned<B>::value << '\n';
    std::cout << std::is_unsigned<C>::value << '\n';
}

Output: 

false
false
false
true
false
false

[editar] Veja também

(C++11)
verifica se um tipo é assinado tipo de aritmética
Original:
checks if a type is signed arithmetic type
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(modelo de classe) [edit]
(C++11)
verifica se um tipo é tipo de ponto flutuante
Original:
checks if a type is floating-point type
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(modelo de classe) [edit]
(C++11)
verifica se um tipo é tipo integral
Original:
checks if a type is integral type
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(modelo de classe) [edit]
(C++11)
faz o tipo de dado integrante assinado
Original:
makes the given integral type signed
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(modelo de classe) [edit]
(C++11)
faz o tipo de dado unsigned integrante
Original:
makes the given integral type unsigned
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(modelo de classe) [edit]
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