sizeof... operator — cppreference.com

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Interroge le nombre d'éléments dans un Paquet de paramètre .

Original:

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Syntaxe


`sizeof...(` parameter_pack `)`		(depuis C++11)

Retourne un objet de type .. std::size_t

Original:

Returns an object of type std::size_t.

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Explication

Retourne le nombre d'éléments dans un Paquet de paramètre .

Original:

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Mots-clés

sizeof

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 :

Voir aussi

sizeof