libstdc++
experimental/unordered_set
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1 // <experimental/unordered_set> -*- C++ -*-
2 
3 // Copyright (C) 2015-2025 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 
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24 
25 /** @file experimental/unordered_set
26  * This is a TS C++ Library header.
27  * @ingroup libfund-ts
28  */
29 
30 #ifndef _GLIBCXX_EXPERIMENTAL_UNORDERED_SET
31 #define _GLIBCXX_EXPERIMENTAL_UNORDERED_SET 1
32 
33 #ifdef _GLIBCXX_SYSHDR
34 #pragma GCC system_header
35 #endif
36 
37 #include <bits/requires_hosted.h> // experimental is currently omitted
38 
39 #if __cplusplus >= 201402L
40 
41 #include <unordered_set>
42 #include <bits/erase_if.h>
43 #include <experimental/memory_resource>
44 
45 namespace std _GLIBCXX_VISIBILITY(default)
46 {
47 _GLIBCXX_BEGIN_NAMESPACE_VERSION
48 
49 namespace experimental
50 {
51 inline namespace fundamentals_v2
52 {
53  template<typename _Key, typename _Hash, typename _CPred, typename _Alloc,
54  typename _Predicate>
55  inline void
56  erase_if(unordered_set<_Key, _Hash, _CPred, _Alloc>& __cont,
57  _Predicate __pred)
58  {
59  _GLIBCXX_STD_C::unordered_set<_Key, _Hash, _CPred, _Alloc>&
60  __ucont = __cont;
61  std::__detail::__erase_nodes_if(__cont, __ucont, __pred);
62  }
63 
64  template<typename _Key, typename _Hash, typename _CPred, typename _Alloc,
65  typename _Predicate>
66  inline void
67  erase_if(unordered_multiset<_Key, _Hash, _CPred, _Alloc>& __cont,
68  _Predicate __pred)
69  {
70  _GLIBCXX_STD_C::unordered_multiset<_Key, _Hash, _CPred, _Alloc>&
71  __ucont = __cont;
72  std::__detail::__erase_nodes_if(__cont, __ucont, __pred);
73  }
74 
75  namespace pmr {
76  template<typename _Key, typename _Hash = hash<_Key>,
77  typename _Pred = equal_to<_Key>>
78  using unordered_set
79  = std::unordered_set<_Key, _Hash, _Pred, polymorphic_allocator<_Key>>;
80 
81  template<typename _Key, typename _Hash = hash<_Key>,
82  typename _Pred = equal_to<_Key>>
83  using unordered_multiset
84  = std::unordered_multiset<_Key, _Hash, _Pred,
85  polymorphic_allocator<_Key>>;
86  } // namespace pmr
87 
88 } // namespace fundamentals_v2
89 } // namespace experimental
90 
91 _GLIBCXX_END_NAMESPACE_VERSION
92 } // namespace std
93 
94 #endif // C++14
95 
96 #endif // _GLIBCXX_EXPERIMENTAL_UNORDERED_SET