bsl::unordered_multimap::operator=

Assign to this object the value, hash function, and key‐equivalence comparator of the specified rhs object, propagate to this object the allocator of rhs if the ALLOCATOR type has trait propagate_on_container_move_assignment, and return a reference providing modifiable access to this object. The contents of rhs are moved (in constant time) to this unordered multimap if get_allocator() == rhs.get_allocator() (after accounting for the aforementioned trait); otherwise, all elements in this unordered multimap are either destroyed or move‐assigned to, and each additional element in rhs is move‐inserted into this unordered multimap. rhs is left in a valid but unspecified state, and if an exception is thrown, *this is left in a valid but unspecified state. This method requires that the (template parameter) types KEY and VALUE both be move‐assignable and move‐insertable into this unordered multimap (see {Requirements on KEY and VALUE}).