sizeof... operator
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Abfragen der Anzahl von Elementen in einer Parameter Pack .
Original:
Queries the number of elements in a Parameter Pack.
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Inhaltsverzeichnis |
[Bearbeiten] Syntax
sizeof...( parameter_pack )
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(seit C++11) | ||||||||
Gibt ein Objekt vom Typ std::size_t .
Original:
Returns an object of type std::size_t.
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[Bearbeiten] Erklärung
Gibt die Anzahl der Elemente in einem Parameter Pack .
Original:
Returns the number of elements in a Parameter Pack.
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[Bearbeiten] Keywords
[Bearbeiten] Beispiel
#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
