std::get(std::array)
From cppreference.com
| template< size_t I, class T, size_t N > constexpr T& get( array<T,N>& a ); |
(1) | (since C++11) |
| template< size_t I, class T, size_t N > constexpr T&& get( array<T,N>&& a ); |
(2) | (since C++11) |
| template< size_t I, class T, size_t N > constexpr const T& get( const array<T,N>& a ); |
(3) | (since C++11) |
| template< size_t I, class T, size_t N > constexpr const T&& get( const array<T,N>&& a ); |
(4) | (since C++17) |
Extracts the Ith element element from the array.
I must be an integer value in range [0, N). This is enforced at compile time as opposed to at() or operator[].
Contents |
[edit] Parameters
| a | - | array whose contents to extract |
[edit] Return value
A reference to the Ith element of a.
[edit] Exceptions
noexcept specification:
noexcept
[edit] Notes
The overloads are marked as constexpr since C++14.
[edit] Example
Run this code
#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:
(1, 2, 3)
[edit] See also
| access specified element (public member function) | |
| access specified element with bounds checking (public member function) | |
| tuple accesses specified element (function template) | |
| (C++11) |
accesses an element of a pair (function template) |