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std::is_unsigned

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C++
 
Utilidades de la biblioteca
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initializer_list(C++11)
bitset
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rel_ops::operator!=
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pair
tuple(C++11)
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Swap, forward and move
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swap
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Tipos básicos
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Basic types
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is_arithmetic(C++11)
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is_standard_layout(C++11)
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is_signed(C++11)
is_unsigned(C++11)
Operaciones compatibles
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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)
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make_unsigned(C++11)
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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;
 (ya que C + +11)
Si T es un tipo de aritmética sin signo, establece en el miembro constante value true iguales. Para cualquier otro tipo, es 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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Contenido

Inherited from std::integral_constant

Member constants

value
[estático]
true si T is an unsigned arithmetic type , false lo contrario
Original:
true if T is an unsigned arithmetic type , false otherwise
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(público miembro constante estática)

Member functions

operator bool
convierte el objeto a bool, devuelve value
Original:
converts the object to bool, returns value
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(miembro público función)

Member types

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

[editar] Ejemplo

#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] Ver también

(C++11)
Comprueba si un tipo se firmaron tipo aritmético
Original:
checks if a type is signed arithmetic type
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(clase de plantilla) [edit]
(C++11)
Comprueba si un tipo es tipo de punto flotante
Original:
checks if a type is floating-point type
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(clase de plantilla) [edit]
(C++11)
Comprueba si un tipo es de tipo integral
Original:
checks if a type is integral type
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(clase de plantilla) [edit]
(C++11)
hace que el tipo dado integral firmado
Original:
makes the given integral type signed
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(clase de plantilla) [edit]
(C++11)
hace que el tipo dado integral sin firmar
Original:
makes the given integral type unsigned
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(clase de plantilla) [edit]
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