std::is_arithmetic
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| Definido no cabeçalho <type_traits>
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| template< class T > struct is_arithmetic; |
(desde 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.
Índice |
Herdado de std::integral_constant
Member constants
| value [estática] |
true se T is an arithmetic type , false contrário Original: true if T is an arithmetic 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
| operator bool |
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
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bool
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type
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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] Possível implementação
template< class T > struct is_arithmetic : std::integral_constant<bool, std::is_integral<T>::value || std::is_floating_point<T>::value> {}; |
[editar] Exemplo
#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'; }
Saída:
false true false false true false false
[editar] Veja também
| (C++11) |
verifica se um tipo é tipo integral Original: checks if a type is integral type 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) |
| (C++11) |
verifica se um tipo é tipo de ponto flutuante Original: checks if a type is floating-point type 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) |
