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Limit our _Hashtable implementation to ranged hash. _H1 is now rename to _Hash matching the _Hash functor used for unordered containers. _H2 is now renamed to _RangeHash. Former _Hash simply becomes _Unused. Remove _ExtractKey storage. libstdc++-v3/ChangeLog: * include/bits/hashtable_policy.h (_Hashtable<>): Rename _H1 into _Hash _H2 into _RangeHash and _Hash into _Unused. (_Hastable_base<>): Likewise. (_Map_base<>): Likewise. (_Insert_base<>): Likewise. (_Insert<>): Likewise. (_Rehash_base<>): Likewise. (_Local_iterator_base<>): Likewise. (_Hash_code_base<>): Likewise. (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, false>): Remove. (_Hash_code_base<_Key, _Value, _ExtractKey, _H1, _H2, _Hash, true>): Remove. (_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHas, _Unused, bool>): Remove _Hashtable_ebo_helper<2, _RangeHash> base type.. (_Hash_code_base<>::_M_bucket_index(const _Key&, __hash_code, size_t)): Replace by... (_Hash_code_base<>::_M_bucket_index(__hash_code, size_t)): ...this. (_Local_iterator<>): Remove _H1 and _H2 template parameters. (_Local_const_iterator<>): Likewise. (_Equality<>): Likewise. (_Map_base<>::operator[](const key_type&): Adapt. (_Map_base<>::operator[](key_type&&): Adapt. (_Identity::operator()): Add noexcept. (_Select1st::operator()): Likewise. (_Hash_code_base<>): Remove _Hashtable_ebo_helper<0, _ExtractKey> base type. (_Hash_code_base::_M_extract): Remove. * include/bits/hashtable.h (_Hashtable<>): Remove _H1 and _H2 template parameters. Remove _ExtractKey from constructors. (_Hashtable<>::_M_insert_unique_node(const key_type&, size_t, __hash_code, __node_type*, size_t)): Replace by... (_Hashtable<>::_M_insert_unique_node(size_t, __hash_code, __node_type*, size_t)): ...this. (_Hashtable<>::_M_insert_muti_node(__node_type*, const key_type&, __hash_code, __node_type*)): Replace by... (_Hashtable<>::_M_insert_multi_node(__node_type*, __hash_code, __node_type*)): ...this. (_Hashtable<>::__key_extract): Remove. * include/bits/node_handle.h: Adapt.
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