std::tuple_size(std::array)
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<tbody> </tbody>| Definido no cabealho <array>
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template< class T, size_t N > class tuple_size< array<T, N> > : public integral_constant<size_t, N> { }; |
(1) | (desde C++11) |
Permite o acesso ao nmero de elementos de um std::array como uma expresso constante de tempo de compilao.
Original:
Provides access to the number of elements in an std::array as a compile-time constant expression.
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 [esttica] |
N, the number of elements in the array (membro esttico pblico constante) |
Member functions
operator std::size_t |
converte o objeto em std::size_t, retorna value Original: converts the object to std::size_t, returns value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (funo pblica 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
|
std::size_t
|
type
|
std::integral_constant<std::size_t, value>
|
Exemplo
#include <iostream>
#include <array>
template<class T>
void test(T t)
{
int a[std::tuple_size<T>::value]; // can be used at compile time
std::cout << std::tuple_size<T>::value << '\n';
}
int main()
{
std::array<float, 3> arr;
test(arr);
}
Sada:
3
Veja tambm
obtm o tamanho de tuple em tempo de compilao Original: obtains the size of tuple at compile time The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (especializao modelo. classe) | |