bsl::unordered_map::operator=

Assign to this object the value, hash function, and key-equality 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 map if get_allocator() == rhs.get_allocator() (after accounting for the aforementioned trait); otherwise, all elements in this container are either destroyed or move-assigned to, and each additional element in rhs is move-inserted into this unordered_map. 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 type value_type be move-constructible (see {Requirements on value_type}).