std::swap(std::map)

From cppreference.com
< cpp‎ | container‎ | map

template< class Key, class T, class Compare, class Alloc >

void swap( map<Key,T,Compare,Alloc>& lhs,

           map<Key,T,Compare,Alloc>& rhs );
(until C++17)
template< class Key, class T, class Compare, class Alloc >

void swap( map<Key,T,Compare,Alloc>& lhs,

           map<Key,T,Compare,Alloc>& rhs ) noexcept(/* see below */);
(since C++17)

Specializes the std::swap algorithm for std::map. Swaps the contents of lhs and rhs. Calls lhs.swap(rhs).

Parameters

lhs, rhs - containers whose contents to swap

Return value

(none)

Complexity

Constant.

Exceptions

noexcept specification:  
noexcept(noexcept(lhs.swap(rhs)))
(since C++17)

See also

swaps the contents
(public member function)