template< class Key, class T, class Hash, class KeyEqual, class Alloc >
void swap( unordered_map<Key,T,Hash,KeyEqual,Alloc>& lhs,
unordered_map<Key,T,Hash,KeyEqual,Alloc>& rhs ); (since C++11)
Specializes the std::swap algorithm for std::unordered_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 speci