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std::get(std::array) – cppreference.com

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`template<size_t I, class T, size_t N > T& get( array<T,N>& a );`	(1)	(seit C++11)

`template<size_t I, class T, size_t N > T&& get( array<T,N>&& a );`	(2)	(seit C++11)

`template<size_t I, class T, size_t N > const T& get( const array<T,N>& a );`	(3)	(seit C++11)

Extrahiert die Ith element aus dem Array .

Original:

Extracts the Ith element element from the array.

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I muss ein Integer-Wert im Bereich [0, N) sein. Dies wird bei der Kompilierung durchgesetzt zu at() entgegengesetzt oder operator[]() .

Original:

I must be an integer value in range [0, N). This is enforced at compile time as opposed to at() or operator[]().

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Parameter

a

-

Array, dessen Inhalt zu extrahieren

Original:

array whose contents to extract

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Rückgabewert

1)

Verweis auf die Ith Element a .

Original:

Reference to the Ith element of a.

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2)

Rvalue Verweis auf das Element Ith a, sofern das Element der L-Wert-Referenz-Typ, wobei in diesem Fall L-Wert Verweis zurückgegeben .

Original:

Rvalue reference to the Ith element of a, unless the element is of lvalue reference type, in which case lvalue reference is returned.

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3)

Const Verweis auf die Ith Element a .

Original:

Const reference to the Ith element of a.

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Ausnahmen

Beispiel

#include <iostream>
#include <array>

int main()
{
    std::array<int, 3> arr;
    
    // set values:
    std::get<0>(arr) = 1;
    std::get<1>(arr) = 2;
    std::get<2>(arr) = 3;
    
    // get values:
    std::cout << "(" << std::get<0>(arr) << ", " << std::get<1>(arr)
              << ", " << std::get<2>(arr) << ")\n";
}

Output:

Siehe auch


operator[]	Zugriff auf angegebene Element Original: access specified element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) [edit]

at	Zugriff auf angegebene Element mit Überprüfung von Grenzen Original: access specified element with bounds checking The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) [edit]

std::get(std::tuple)	Zugriff auf das angegebene Element des Tupels Original: tuple accesses specified element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

std::get(std::pair) (C++11)	greift ein Element eines `pair` Original: accesses an element of a `pair` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]