bsl::unordered_map::operator=

Assign to this object the value, hasher, key‐equality functor, and max_load_factor of the specified rhs object, propagate to this object the allocator of rhs if the ALLOCATOR type has trait propagate_on_container_copy_assignment, and return a reference providing modifiable access to this object. Note that this method requires that the (template parameter) types KEY and VALUE both be copy‐constructible (see {Requirements on value_type}).