Namespace
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sizeof... operator

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Query il numero di elementi in una parametro confezione.
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Queries the number of elements in a parametro confezione.
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Indice

[modifica] Sintassi

sizeof...( parameter_pack ) (dal C++11)
Restituisce un oggetto di tipo std::size_t.
Original:
Returns an object of type std::size_t.
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[modifica] Spiegazione

Restituisce il numero di elementi in una parametro confezione.
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Returns the number of elements in a parametro confezione.
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[modifica] Parole chiave

sizeof

[modifica] Esempio

#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';
}

Output: 

0
1
3

[modifica] Vedi anche

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