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Showing content from https://en.cppreference.com/w/cpp/language/../error/error_code/../../container/array/get.html below:

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

(1) (since C++11)
(constexpr since C++14) (2) (since C++11)
(constexpr since C++14) (3) (since C++11)
(constexpr since C++14) (4) (since C++11)
(constexpr since C++14)

Extracts the I^th element from the array using tuple-like interface.

I must be an integer value in range [â0â, N). This is enforced at compile time as opposed to at() or operator[].

[edit] Parameters a - array whose contents to extract [edit] Return value

A reference to the I^th element of a.

[edit] Complexity

Constant.

[edit] Example

#include <array>
#include <iostream>
 
constexpr std::array v{1, 2, 3};
static_assert(get<0>(v) == 1 && get<1>(v) == 2 && get<2>(v) == 3);
 
int main()
{
    std::array<int, 3> a;
 
    // set values:
    get<0>(a) = 1, get<1>(a) = 2, get<2>(a) = 3;
 
    // get values:
    std::cout << '(' << get<0>(a) << ',' << get<1>(a) << ',' << get<2>(a) << ")\n";
}

Output:

[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior LWG 2485 C++11 there are no overloads for const array&& the overloads are added [edit] See also

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