libstdc++
unordered_map
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1 // <unordered_map> -*- C++ -*-
2 
3 // Copyright (C) 2007-2025 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file include/unordered_map
26  * This is a Standard C++ Library header.
27  */
28 
29 #ifndef _GLIBCXX_UNORDERED_MAP
30 #define _GLIBCXX_UNORDERED_MAP 1
31 
32 #ifdef _GLIBCXX_SYSHDR
33 #pragma GCC system_header
34 #endif
35 
36 #include <bits/requires_hosted.h> // container
37 
38 #if __cplusplus < 201103L
39 # include <bits/c++0x_warning.h>
40 #else
41 
42 #include <initializer_list>
43 #include <bits/unordered_map.h>
44 #include <bits/range_access.h>
45 #include <bits/erase_if.h>
46 
47 #ifdef _GLIBCXX_DEBUG
48 # include <debug/unordered_map>
49 #endif
50 
51 #define __glibcxx_want_allocator_traits_is_always_equal
52 #define __glibcxx_want_containers_ranges
53 #define __glibcxx_want_erase_if
54 #define __glibcxx_want_generic_unordered_lookup
55 #define __glibcxx_want_node_extract
56 #define __glibcxx_want_nonmember_container_access
57 #define __glibcxx_want_unordered_map_try_emplace
58 #define __glibcxx_want_tuple_like
59 #include <bits/version.h>
60 
61 #if __cplusplus >= 201703L
62 #include <bits/memory_resource.h>
63 namespace std _GLIBCXX_VISIBILITY(default)
64 {
65 _GLIBCXX_BEGIN_NAMESPACE_VERSION
66  namespace pmr
67  {
68  template<typename _Key, typename _Tp, typename _Hash = std::hash<_Key>,
69  typename _Pred = std::equal_to<_Key>>
70  using unordered_map
71  = std::unordered_map<_Key, _Tp, _Hash, _Pred,
72  polymorphic_allocator<pair<const _Key, _Tp>>>;
73  template<typename _Key, typename _Tp, typename _Hash = std::hash<_Key>,
74  typename _Pred = std::equal_to<_Key>>
75  using unordered_multimap
76  = std::unordered_multimap<_Key, _Tp, _Hash, _Pred,
77  polymorphic_allocator<pair<const _Key, _Tp>>>;
78  } // namespace pmr
79 _GLIBCXX_END_NAMESPACE_VERSION
80 } // namespace std
81 #endif // C++17
82 
83 #if __cplusplus > 201703L
84 namespace std _GLIBCXX_VISIBILITY(default)
85 {
86 _GLIBCXX_BEGIN_NAMESPACE_VERSION
87  template<typename _Key, typename _Tp, typename _Hash, typename _CPred,
88  typename _Alloc, typename _Predicate>
89  inline typename unordered_map<_Key, _Tp, _Hash, _CPred, _Alloc>::size_type
90  erase_if(unordered_map<_Key, _Tp, _Hash, _CPred, _Alloc>& __cont,
91  _Predicate __pred)
92  {
93  _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash, _CPred, _Alloc>&
94  __ucont = __cont;
95  return __detail::__erase_nodes_if(__cont, __ucont, __pred);
96  }
97 
98  template<typename _Key, typename _Tp, typename _Hash, typename _CPred,
99  typename _Alloc, typename _Predicate>
100  inline typename unordered_multimap<_Key, _Tp, _Hash, _CPred, _Alloc>::
101  size_type
102  erase_if(unordered_multimap<_Key, _Tp, _Hash, _CPred, _Alloc>& __cont,
103  _Predicate __pred)
104  {
105  _GLIBCXX_STD_C::unordered_multimap<_Key, _Tp, _Hash, _CPred, _Alloc>&
106  __ucont = __cont;
107  return __detail::__erase_nodes_if(__cont, __ucont, __pred);
108  }
109 _GLIBCXX_END_NAMESPACE_VERSION
110 } // namespace std
111 #endif // C++20
112 
113 #endif // C++11
114 
115 #endif // _GLIBCXX_UNORDERED_MAP