23 Containers library [containers]

23.5 Unordered associative containers [unord]

23.5.5 Class template unordered_multimap [unord.multimap]

23.5.5.4 unordered_multimap swap [unord.multimap.swap]

template <class Key, class T, class Hash, class Pred, class Alloc> void swap(unordered_multimap<Key, T, Hash, Pred, Alloc>& x, unordered_multimap<Key, T, Hash, Pred, Alloc>& y);

Effects: x.swap(y).