sizeof... operator
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Interroge le nombre d'éléments dans un Paquet de paramètre .
Original:
Queries the number of elements in a Paquet de paramètre.
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Sommaire |
[modifier] Syntaxe
sizeof...( parameter_pack )
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(depuis C++11) | ||||||||
Retourne un objet de type .. std::size_t
Original:
Returns an object of type std::size_t.
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[modifier] Explication
Retourne le nombre d'éléments dans un Paquet de paramètre .
Original:
Returns the number of elements in a Paquet de paramètre.
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[modifier] Mots-clés
[modifier] Exemple
#include <iostream> template<class... Args> std::size_t f() { return sizeof...(Args); } int main() { std::cout << f<>() << '\n' << f<int>() << '\n' << f<char, int, double>() << '\n'; }
Résultat :
0 1 3
