libstdc++
forward_list
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1 // <forward_list> -*- C++ -*-
2 
3 // Copyright (C) 2008-2025 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/forward_list
26  * This is a Standard C++ Library header.
27  */
28 
29 #ifndef _GLIBCXX_FORWARD_LIST
30 #define _GLIBCXX_FORWARD_LIST 1
31 
32 #ifdef _GLIBCXX_SYSHDR
33 #pragma GCC system_header
34 #endif
35 
36 #include <bits/requires_hosted.h> // containers
37 
38 #if __cplusplus < 201103L
39 # include <bits/c++0x_warning.h>
40 #else
41 
42 #include <bits/forward_list.h>
43 #include <bits/range_access.h>
44 #include <bits/forward_list.tcc>
45 
46 #ifdef _GLIBCXX_DEBUG
47 # include <debug/forward_list>
48 #endif
49 
50 #define __glibcxx_want_algorithm_default_value_type
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_incomplete_container_elements
55 #define __glibcxx_want_list_remove_return_type
56 #define __glibcxx_want_nonmember_container_access
57 #include <bits/version.h>
58 
59 #if __cplusplus >= 201703L
60 #include <bits/memory_resource.h>
61 namespace std _GLIBCXX_VISIBILITY(default)
62 {
63 _GLIBCXX_BEGIN_NAMESPACE_VERSION
64  namespace pmr
65  {
66  template<typename _Tp>
67  using forward_list = std::forward_list<_Tp, polymorphic_allocator<_Tp>>;
68  } // namespace pmr
69 _GLIBCXX_END_NAMESPACE_VERSION
70 } // namespace std
71 #endif // C++17
72 
73 #ifdef __cpp_lib_erase_if // C++ >= 20 && HOSTED
74 namespace std _GLIBCXX_VISIBILITY(default)
75 {
76 _GLIBCXX_BEGIN_NAMESPACE_VERSION
77  template<typename _Tp, typename _Alloc, typename _Predicate>
78  inline typename forward_list<_Tp, _Alloc>::size_type
79  erase_if(forward_list<_Tp, _Alloc>& __cont, _Predicate __pred)
80  { return __cont.remove_if(__pred); }
81 
82  template<typename _Tp, typename _Alloc,
83  typename _Up _GLIBCXX26_DEF_VAL_T(_Tp)>
84  inline typename forward_list<_Tp, _Alloc>::size_type
85  erase(forward_list<_Tp, _Alloc>& __cont, const _Up& __value)
86  {
87  // _GLIBCXX_RESOLVE_LIB_DEFECTS
88  // 4135. helper lambda of std::erase for list should specify return type
89  return std::erase_if(__cont, [&](const auto& __elem) -> bool {
90  return __elem == __value;
91  });
92  }
93 _GLIBCXX_END_NAMESPACE_VERSION
94 } // namespace std
95 #endif // __cpp_lib_erase_if
96 
97 #endif // C++11
98 
99 #endif // _GLIBCXX_FORWARD_LIST