зеркало из https://github.com/microsoft/STL.git
474 строки
18 KiB
C++
474 строки
18 KiB
C++
// hash_map extension header
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// Copyright (c) Microsoft Corporation.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#pragma once
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#ifndef _HASH_MAP_
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#define _HASH_MAP_
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#include <yvals_core.h>
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#if _STL_COMPILER_PREPROCESSOR
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#include <xhash>
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#pragma pack(push, _CRT_PACKING)
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#pragma warning(push, _STL_WARNING_LEVEL)
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#pragma warning(disable : _STL_DISABLED_WARNINGS)
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_STL_DISABLE_CLANG_WARNINGS
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#pragma push_macro("new")
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#undef new
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#ifndef _SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS
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#error <hash_map> is deprecated and will be REMOVED. Please use <unordered_map>. You can define \
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_SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS to acknowledge that you have received this warning.
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#endif // _SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS
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namespace stdext {
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using _STD allocator;
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using _STD enable_if_t;
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using _STD is_constructible_v;
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using _STD pair;
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using _STD swap;
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using _STD _Hash;
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using _STD _Is_nothrow_swappable;
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using _STD _Swap_adl;
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using _STD _Xout_of_range;
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// CLASS TEMPLATE _Hmap_traits
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template <class _Kty, // key type
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class _Ty, // mapped type
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class _Tr, // comparator predicate type
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class _Alloc, // actual allocator type (should be value allocator)
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bool _Mfl> // true if multiple equivalent keys are permitted
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class _Hmap_traits : public _Tr { // traits required to make _Hash behave like a map
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public:
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using key_type = _Kty;
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using value_type = pair<const _Kty, _Ty>;
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using _Mutable_value_type = pair<_Kty, _Ty>;
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using key_compare = _Tr;
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using allocator_type = _Alloc;
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#if _HAS_CXX17
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using node_type =
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_STD _Node_handle<_STD _List_node<value_type, typename _STD allocator_traits<_Alloc>::void_pointer>, _Alloc,
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_STD _Node_handle_map_base, _Kty, _Ty>;
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#endif // _HAS_CXX17
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static constexpr bool _Multi = _Mfl;
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static constexpr bool _Standard = false;
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template <class... _Args>
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using _In_place_key_extractor = _STD _In_place_key_extract_map<_Kty, _Args...>;
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template <class>
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using _Deduce_key = const _Kty&;
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using key_equal = _Tr;
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_Hmap_traits() = default;
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_Hmap_traits(const _Tr& _Traits) noexcept(_STD is_nothrow_copy_constructible_v<_Tr>) : _Tr(_Traits) {}
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class value_compare {
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public:
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using first_argument_type = value_type;
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using second_argument_type = value_type;
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using result_type = bool;
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_NODISCARD bool operator()(const value_type& _Left, const value_type& _Right) const
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noexcept(noexcept(_Keycompobj(_Left.first, _Right.first))) {
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// test if _Left precedes _Right by comparing just keys
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return _Keycompobj(_Left.first, _Right.first);
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}
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value_compare(const key_compare& _Keycomparg) noexcept(_STD is_nothrow_copy_constructible_v<key_compare>)
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: _Keycompobj(_Keycomparg) {}
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key_compare _Keycompobj;
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};
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template <class _Ty1, class _Ty2>
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static const _Kty& _Kfn(const pair<_Ty1, _Ty2>& _Val) noexcept { // extract key from element value
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return _Val.first;
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}
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template <class _Ty1, class _Ty2>
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static const _Ty2& _Nonkfn(const pair<_Ty1, _Ty2>& _Val) noexcept { // extract non-key from element value
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return _Val.second;
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}
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float& _Get_max_bucket_size() noexcept {
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return _Max_buckets;
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}
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const float& _Get_max_bucket_size() const noexcept {
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return _Max_buckets;
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}
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void swap(_Hmap_traits& _Rhs) noexcept(_Is_nothrow_swappable<_Tr>::value) {
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_Swap_adl(static_cast<_Tr&>(*this), static_cast<_Tr&>(_Rhs));
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_STD swap(_Max_buckets, _Rhs._Max_buckets);
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}
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float _Max_buckets = 0.0F; // current maximum bucket size
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};
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// CLASS TEMPLATE hash_map
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template <class _Kty, class _Ty, class _Tr = hash_compare<_Kty, less<_Kty>>,
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class _Alloc = allocator<pair<const _Kty, _Ty>>>
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class hash_map : public _Hash<_Hmap_traits<_Kty, _Ty, _Tr, _Alloc, false>> {
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// hash table of {key, mapped} values, unique keys
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public:
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using _Mybase = _Hash<_Hmap_traits<_Kty, _Ty, _Tr, _Alloc, false>>;
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using key_type = _Kty;
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using mapped_type = _Ty;
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using referent_type = _Ty;
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using key_compare = _Tr;
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using value_compare = typename _Mybase::_Value_compare;
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using value_type = pair<const _Kty, _Ty>;
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using allocator_type = typename _Mybase::allocator_type;
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using size_type = typename _Mybase::size_type;
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using difference_type = typename _Mybase::difference_type;
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using pointer = typename _Mybase::pointer;
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using const_pointer = typename _Mybase::const_pointer;
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using reference = value_type&;
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using const_reference = const value_type&;
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using iterator = typename _Mybase::iterator;
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using const_iterator = typename _Mybase::const_iterator;
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using _Alnode = typename _Mybase::_Alnode;
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using _Alnode_traits = typename _Mybase::_Alnode_traits;
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#if _HAS_CXX17
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using insert_return_type = _STD _Insert_return_type<iterator, typename _Mybase::node_type>;
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#endif // _HAS_CXX17
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hash_map() : _Mybase(key_compare(), allocator_type()) {}
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explicit hash_map(const allocator_type& _Al) : _Mybase(key_compare(), _Al) {}
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hash_map(const hash_map& _Right)
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: _Mybase(_Right, _Alnode_traits::select_on_container_copy_construction(_Right._Getal())) {}
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hash_map(const hash_map& _Right, const allocator_type& _Al) : _Mybase(_Right, _Al) {}
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explicit hash_map(const key_compare& _Traits) : _Mybase(_Traits, allocator_type()) {}
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hash_map(const key_compare& _Traits, const allocator_type& _Al) : _Mybase(_Traits, _Al) {}
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template <class _Iter>
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hash_map(_Iter _First, _Iter _Last) : _Mybase(key_compare(), allocator_type()) {
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insert(_First, _Last);
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}
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template <class _Iter>
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hash_map(_Iter _First, _Iter _Last, const key_compare& _Traits) : _Mybase(_Traits, allocator_type()) {
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insert(_First, _Last);
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}
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template <class _Iter>
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hash_map(_Iter _First, _Iter _Last, const key_compare& _Traits, const allocator_type& _Al)
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: _Mybase(_Traits, _Al) {
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insert(_First, _Last);
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}
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hash_map& operator=(const hash_map& _Right) {
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_Mybase::operator=(_Right);
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return *this;
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}
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hash_map(hash_map&& _Right) : _Mybase(_STD move(_Right)) {}
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hash_map(hash_map&& _Right, const allocator_type& _Al) : _Mybase(_STD move(_Right), _Al) {}
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hash_map& operator=(hash_map&& _Right) noexcept(noexcept(_Mybase::operator=(_STD move(_Right)))) {
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_Mybase::operator=(_STD move(_Right));
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return *this;
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}
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mapped_type& operator[](key_type&& _Keyval) {
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return this->_Try_emplace(_STD move(_Keyval)).first->_Myval.second;
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}
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void swap(hash_map& _Right) noexcept(noexcept(_Mybase::swap(_Right))) {
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_Mybase::swap(_Right);
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}
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using _Mybase::insert;
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template <class _Valty, enable_if_t<is_constructible_v<value_type, _Valty>, int> = 0>
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pair<iterator, bool> insert(_Valty&& _Val) {
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return this->emplace(_STD forward<_Valty>(_Val));
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}
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template <class _Valty, enable_if_t<is_constructible_v<value_type, _Valty>, int> = 0>
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iterator insert(const_iterator _Where, _Valty&& _Val) {
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return this->emplace_hint(_Where, _STD forward<_Valty>(_Val));
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}
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hash_map(_STD initializer_list<value_type> _Ilist) : _Mybase(key_compare(), allocator_type()) {
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insert(_Ilist);
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}
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hash_map(_STD initializer_list<value_type> _Ilist, const key_compare& _Pred)
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: _Mybase(_Pred, allocator_type()) {
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insert(_Ilist);
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}
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hash_map(_STD initializer_list<value_type> _Ilist, const key_compare& _Pred, const allocator_type& _Al)
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: _Mybase(_Pred, _Al) {
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insert(_Ilist);
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}
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hash_map& operator=(_STD initializer_list<value_type> _Ilist) {
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this->clear();
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insert(_Ilist);
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return *this;
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}
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mapped_type& operator[](const key_type& _Keyval) {
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return this->_Try_emplace(_Keyval).first->_Myval.second;
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}
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mapped_type& at(const key_type& _Keyval) {
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const auto _Target = this->_Find_last(_Keyval, this->_Traitsobj(_Keyval));
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if (_Target._Duplicate) {
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return _Target._Duplicate->_Myval.second;
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}
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_Xout_of_range("invalid hash_map<K, T> key");
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}
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const mapped_type& at(const key_type& _Keyval) const {
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const auto _Target = this->_Find_last(_Keyval, this->_Traitsobj(_Keyval));
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if (_Target._Duplicate) {
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return _Target._Duplicate->_Myval.second;
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}
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_Xout_of_range("invalid hash_map<K, T> key");
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}
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using reverse_iterator = _STD reverse_iterator<iterator>;
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using const_reverse_iterator = _STD reverse_iterator<const_iterator>;
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reverse_iterator rbegin() noexcept {
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return reverse_iterator(this->end());
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}
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const_reverse_iterator rbegin() const noexcept {
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return const_reverse_iterator(this->end());
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}
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reverse_iterator rend() noexcept {
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return reverse_iterator(this->begin());
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}
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const_reverse_iterator rend() const noexcept {
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return const_reverse_iterator(this->begin());
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}
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const_reverse_iterator crbegin() const noexcept {
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return rbegin();
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}
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const_reverse_iterator crend() const noexcept {
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return rend();
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}
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_NODISCARD key_compare key_comp() const {
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return this->_Traitsobj;
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}
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_NODISCARD value_compare value_comp() const {
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return value_compare(key_comp());
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}
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using _Mybase::_Unchecked_begin;
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using _Mybase::_Unchecked_end;
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};
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template <class _Kty, class _Ty, class _Tr, class _Alloc>
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void swap(hash_map<_Kty, _Ty, _Tr, _Alloc>& _Left, hash_map<_Kty, _Ty, _Tr, _Alloc>& _Right) noexcept(
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noexcept(_Left.swap(_Right))) {
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_Left.swap(_Right);
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}
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template <class _Kty, class _Ty, class _Tr, class _Alloc>
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_NODISCARD bool operator==(
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const hash_map<_Kty, _Ty, _Tr, _Alloc>& _Left, const hash_map<_Kty, _Ty, _Tr, _Alloc>& _Right) {
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return _STD _Hash_equal(_Left, _Right);
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}
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template <class _Kty, class _Ty, class _Tr, class _Alloc>
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_NODISCARD bool operator!=(
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const hash_map<_Kty, _Ty, _Tr, _Alloc>& _Left, const hash_map<_Kty, _Ty, _Tr, _Alloc>& _Right) {
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return !(_Left == _Right);
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}
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// CLASS TEMPLATE hash_multimap
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template <class _Kty, class _Ty, class _Tr = hash_compare<_Kty, less<_Kty>>,
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class _Alloc = allocator<pair<const _Kty, _Ty>>>
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class hash_multimap : public _Hash<_Hmap_traits<_Kty, _Ty, _Tr, _Alloc, true>> {
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// hash table of {key, mapped} values, non-unique keys
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public:
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using _Mybase = _Hash<_Hmap_traits<_Kty, _Ty, _Tr, _Alloc, true>>;
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using key_type = _Kty;
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using mapped_type = _Ty;
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using referent_type = _Ty; // old name, magically gone
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using key_compare = _Tr;
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using value_compare = typename _Mybase::_Value_compare;
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using value_type = pair<const _Kty, _Ty>;
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using allocator_type = typename _Mybase::allocator_type;
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using size_type = typename _Mybase::size_type;
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using difference_type = typename _Mybase::difference_type;
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using pointer = typename _Mybase::pointer;
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using const_pointer = typename _Mybase::const_pointer;
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using reference = value_type&;
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using const_reference = const value_type&;
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using iterator = typename _Mybase::iterator;
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using const_iterator = typename _Mybase::const_iterator;
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using _Alnode = typename _Mybase::_Alnode;
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using _Alnode_traits = typename _Mybase::_Alnode_traits;
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hash_multimap() : _Mybase(key_compare(), allocator_type()) {}
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explicit hash_multimap(const allocator_type& _Al) : _Mybase(key_compare(), _Al) {}
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hash_multimap(const hash_multimap& _Right)
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: _Mybase(_Right, _Alnode_traits::select_on_container_copy_construction(_Right._Getal())) {}
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hash_multimap(const hash_multimap& _Right, const allocator_type& _Al) : _Mybase(_Right, _Al) {}
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explicit hash_multimap(const key_compare& _Traits) : _Mybase(_Traits, allocator_type()) {}
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hash_multimap(const key_compare& _Traits, const allocator_type& _Al) : _Mybase(_Traits, _Al) {}
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template <class _Iter>
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hash_multimap(_Iter _First, _Iter _Last) : _Mybase(key_compare(), allocator_type()) {
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insert(_First, _Last);
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}
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template <class _Iter>
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hash_multimap(_Iter _First, _Iter _Last, const key_compare& _Traits) : _Mybase(_Traits, allocator_type()) {
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insert(_First, _Last);
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}
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template <class _Iter>
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hash_multimap(_Iter _First, _Iter _Last, const key_compare& _Traits, const allocator_type& _Al)
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: _Mybase(_Traits, _Al) {
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insert(_First, _Last);
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}
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hash_multimap& operator=(const hash_multimap& _Right) {
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_Mybase::operator=(_Right);
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return *this;
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}
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hash_multimap(hash_multimap&& _Right) : _Mybase(_STD move(_Right)) {}
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hash_multimap(hash_multimap&& _Right, const allocator_type& _Al) : _Mybase(_STD move(_Right), _Al) {}
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hash_multimap& operator=(hash_multimap&& _Right) noexcept(noexcept(_Mybase::operator=(_STD move(_Right)))) {
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_Mybase::operator=(_STD move(_Right));
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return *this;
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}
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void swap(hash_multimap& _Right) noexcept(noexcept(_Mybase::swap(_Right))) {
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_Mybase::swap(_Right);
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}
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using _Mybase::insert;
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template <class _Valty, enable_if_t<is_constructible_v<value_type, _Valty>, int> = 0>
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iterator insert(_Valty&& _Val) {
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return this->emplace(_STD forward<_Valty>(_Val));
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}
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template <class _Valty, enable_if_t<is_constructible_v<value_type, _Valty>, int> = 0>
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iterator insert(const_iterator _Where, _Valty&& _Val) {
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return this->emplace_hint(_Where, _STD forward<_Valty>(_Val));
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}
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hash_multimap(_STD initializer_list<value_type> _Ilist) : _Mybase(key_compare(), allocator_type()) {
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insert(_Ilist);
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}
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hash_multimap(_STD initializer_list<value_type> _Ilist, const key_compare& _Pred)
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: _Mybase(_Pred, allocator_type()) {
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insert(_Ilist);
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}
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hash_multimap(_STD initializer_list<value_type> _Ilist, const key_compare& _Pred, const allocator_type& _Al)
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: _Mybase(_Pred, _Al) {
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insert(_Ilist);
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}
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hash_multimap& operator=(_STD initializer_list<value_type> _Ilist) {
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this->clear();
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insert(_Ilist);
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return *this;
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}
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using reverse_iterator = _STD reverse_iterator<iterator>;
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using const_reverse_iterator = _STD reverse_iterator<const_iterator>;
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reverse_iterator rbegin() noexcept {
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return reverse_iterator(this->end());
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}
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const_reverse_iterator rbegin() const noexcept {
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return const_reverse_iterator(this->end());
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}
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reverse_iterator rend() noexcept {
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return reverse_iterator(this->begin());
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}
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const_reverse_iterator rend() const noexcept {
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return const_reverse_iterator(this->begin());
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}
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const_reverse_iterator crbegin() const noexcept {
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return rbegin();
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}
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const_reverse_iterator crend() const noexcept {
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return rend();
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}
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_NODISCARD key_compare key_comp() const {
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return this->_Traitsobj;
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}
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_NODISCARD value_compare value_comp() const {
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return value_compare(key_comp());
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}
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using _Mybase::_Unchecked_begin;
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using _Mybase::_Unchecked_end;
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};
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template <class _Kty, class _Ty, class _Tr, class _Alloc>
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void swap(hash_multimap<_Kty, _Ty, _Tr, _Alloc>& _Left, hash_multimap<_Kty, _Ty, _Tr, _Alloc>& _Right) noexcept(
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noexcept(_Left.swap(_Right))) {
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_Left.swap(_Right);
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}
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template <class _Kty, class _Ty, class _Tr, class _Alloc>
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_NODISCARD bool operator==(
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const hash_multimap<_Kty, _Ty, _Tr, _Alloc>& _Left, const hash_multimap<_Kty, _Ty, _Tr, _Alloc>& _Right) {
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return _STD _Hash_equal(_Left, _Right);
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}
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template <class _Kty, class _Ty, class _Tr, class _Alloc>
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_NODISCARD bool operator!=(
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const hash_multimap<_Kty, _Ty, _Tr, _Alloc>& _Left, const hash_multimap<_Kty, _Ty, _Tr, _Alloc>& _Right) {
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return !(_Left == _Right);
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}
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} // namespace stdext
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_STD_BEGIN
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using _STDEXT hash_map;
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using _STDEXT hash_multimap;
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_STD_END
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#pragma pop_macro("new")
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_STL_RESTORE_CLANG_WARNINGS
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#pragma warning(pop)
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#pragma pack(pop)
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#endif // _STL_COMPILER_PREPROCESSOR
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#endif // _HASH_MAP_
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