std::is_floating_point
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| Definido no cabeçalho <type_traits>
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| template< class T > struct is_floating_point; |
(desde C++11) | |
Se
T é um tipo de ponto flutuante (float, double, long double, incluindo as variantes cv-qualificados), fornece o membro constante value true igual. Para qualquer outro tipo, é value false.Original:
If
T is a floating-point type (float, double, long double, including any cv-qualified variants), 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.
You can help to correct and verify the translation. Click here for instructions.
Índice |
Herdado de std::integral_constant
Member constants
| value [estática] |
true se T is a floating-point type , false contrário Original: true if T is a floating-point 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] Possível implementação
template< class T > struct is_floating_point : std::integral_constant< bool, std::is_same<float, typename std::remove_cv<T>::type>::value || std::is_same<double, typename std::remove_cv<T>::type>::value || std::is_same<long double, typename std::remove_cv<T>::type>::value > {}; |
[editar] Exemplo
#include <iostream> #include <type_traits> class A {}; int main() { std::cout << std::boolalpha; std::cout << std::is_floating_point<A>::value << '\n'; std::cout << std::is_floating_point<float>::value << '\n'; std::cout << std::is_floating_point<int>::value << '\n'; }
Saída:
false true false
[editar] Veja também
| [estática] |
identifica os IEC 559/IEEE 754 tipos de ponto flutuante Original: identifies the IEC 559/IEEE 754 floating-point types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (of std::numeric_limits membro estático público constante)
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| (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 o tipo de aritmética Original: checks if a type is arithmetic 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) |
