std::is_function
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<metanoindex/>
<tbody> </tbody>| Definido no cabeçalho <type_traits>
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template< class T > struct is_function; |
(desde C++11) | |
Se
T é o tipo de função (mas não std::function, lambda expressão ou outro tipo de objeto que pode ser chamado), fornece o membro constante value true igual. Para qualquer outro tipo, é value false.Original:
If
T is function type (but not std::function, lambda expression or another callable object type), 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.
Herdado de std::integral_constant
Member constants
value [estática] |
true se T is a function type , false contrário Original: true if T is a function 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
|
bool
|
type
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std::integral_constant<bool, value>
|
Exemplo
#include <iostream>
#include <type_traits>
struct A {};
int f()
{
return 1;
}
int main()
{
std::cout << std::boolalpha;
std::cout << std::is_function<A>::value << '\n';
std::cout << std::is_function<int(int)>::value << '\n';
std::cout << std::is_function<decltype(f)>::value << '\n';
std::cout << std::is_function<int>::value << '\n';
}
Saída:
false
true
true
false