NAME¶

std::swap(std::pair) - std::swap(std::pair)

Synopsis¶

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

constexpr void swap( std::pair<T1,T2>& x, std::pair<T1,T2>& y (since C++20)
)
(1)
noexcept(/* see below */);
template< class T1, class T2 >

constexpr void swap( const std::pair<T1,T2>& x, const (2) (since C++23)
std::pair<T1,T2>& y )

noexcept(/* see below */);

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. (since C++17)
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.

Parameters¶

x, y - pairs whose contents to swap

Return value¶

(none)

Exceptions¶

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

See also¶

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