cpp / latest / utility / pair / swap2.html /

std::swap(std::pair)

Defined in header <utility>
(1)
template< class T1, class T2 >
void swap( std::pair<T1,T2>& x, std::pair<T1,T2>& y ) noexcept(/* see below */);
(since C++11)
(until C++20)
template< class T1, class T2 >
constexpr void swap( std::pair<T1,T2>& x, std::pair<T1,T2>& y )
    noexcept(/* see below */);
(since C++20)
template< class T1, class T2 >
constexpr void swap( const std::pair<T1,T2>& x, const std::pair<T1,T2>& y )
    noexcept(/* see below */);
(2) (since C++23)

Swaps the contents of x and y. Equivalent to x.swap(y).

1) This overload participates in overload resolution only if std::is_swappable_v<first_type> && std::is_swappable_v<second_type> is true. 2) This overload participates in overload resolution only if std::is_swappable_v<const first_type> && std::is_swappable_v<const second_type> is true. (since C++17)

Parameters

x, y - pairs whose contents to swap

Return value

(none).

Exceptions

noexcept specification:
noexcept(noexcept(x.swap(y)))

See also

swaps the values of two objects
(function template)
(C++11)
specializes the std::swap algorithm
(function template)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/utility/pair/swap2