std::tuple_size(std::array)
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| Déclaré dans l'en-tête <array>
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| template< class T, size_t N > class tuple_size< array<T, N> > : |
(1) | (depuis C++11) |
Permet d'accéder au nombre d'éléments dans un std::array comme une expression constante de compilation .
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.
Sommaire |
Inherited from std::integral_constant
Member constants
| value [ statique ]Original: static The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
N, the number of elements in the array (constante membre statique publique) |
Member functions
| operator std::size_t |
convertit l'objet en std::size_t, retourne 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. (fonction membre publique) |
Member types
| Type d'
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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std::size_t
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type
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std::integral_constant<std::size_t, value> |
[modifier] Exemple
#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); }
Résultat :
3
[modifier] Voir aussi
| obtient la taille de tuple au moment de la compilation 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. (classe générique spécialisée) | |
