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std::is_arithmetic

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

If T is an arithmetic type (that is, an integral type or a floating-point type), provides the member constant value equal true. For any other type, value is false.

Contenido

Inherited from std::integral_constant

Member constants

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

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operator bool
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(miembro público función)

Member types

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

[editar] Notas

Arithmetic types are the types for which the built-in operadores aritméticos (+, -, *, /) are defined (possibly in combination with the usual arithmetic conversions)

Specializations of std::numeric_limits are provided for all arithmetic types.

[editar] Posible implementación

template< class T >
struct is_arithmetic : std::integral_constant<bool,
                                              std::is_integral<T>::value ||
                                              std::is_floating_point<T>::value> {};

[editar] Ejemplo

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

Output: 

false
true
false
false
true
false
false

[editar] Ver también

(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)
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]
Obtenido de «http://es.cppreference.com/mwiki/index.php?title=cpp/types/is_arithmetic&oldid=22032»