libstdc++
queue
Go to the documentation of this file.
1 // <queue> -*- C++ -*-
2 
3 // Copyright (C) 2001-2025 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 /*
26  *
27  * Copyright (c) 1994
28  * Hewlett-Packard Company
29  *
30  * Permission to use, copy, modify, distribute and sell this software
31  * and its documentation for any purpose is hereby granted without fee,
32  * provided that the above copyright notice appear in all copies and
33  * that both that copyright notice and this permission notice appear
34  * in supporting documentation. Hewlett-Packard Company makes no
35  * representations about the suitability of this software for any
36  * purpose. It is provided "as is" without express or implied warranty.
37  *
38  *
39  * Copyright (c) 1996,1997
40  * Silicon Graphics Computer Systems, Inc.
41  *
42  * Permission to use, copy, modify, distribute and sell this software
43  * and its documentation for any purpose is hereby granted without fee,
44  * provided that the above copyright notice appear in all copies and
45  * that both that copyright notice and this permission notice appear
46  * in supporting documentation. Silicon Graphics makes no
47  * representations about the suitability of this software for any
48  * purpose. It is provided "as is" without express or implied warranty.
49  */
50 
51 /** @file include/queue
52  * This is a Standard C++ Library header.
53  */
54 
55 #ifndef _GLIBCXX_QUEUE
56 #define _GLIBCXX_QUEUE 1
57 
58 #ifdef _GLIBCXX_SYSHDR
59 #pragma GCC system_header
60 #endif
61 
62 #include <bits/requires_hosted.h> // containers
63 
64 #define __glibcxx_want_adaptor_iterator_pair_constructor
65 #define __glibcxx_want_containers_ranges
66 #include <bits/version.h>
67 
68 #include <deque>
69 #include <vector>
70 #include <bits/stl_heap.h>
71 #include <bits/stl_function.h>
72 #include <bits/stl_queue.h>
73 
74 #ifdef __glibcxx_format_ranges // C++ >= 23 && HOSTED
75 #include <bits/formatfwd.h>
76 
77 namespace std _GLIBCXX_VISIBILITY(default)
78 {
79 _GLIBCXX_BEGIN_NAMESPACE_VERSION
80  // Standard does not constrain accepted _CharT, we do so we can
81  // befriend specializations.
82  template<__format::__char _CharT, typename _Tp,
83  formattable<_CharT> _Container>
84  struct formatter<queue<_Tp, _Container>, _CharT>
85  {
86  private:
87  using __maybe_const_adaptor
88  = __conditional_t<
89  __format::__const_formattable_range<_Container, _CharT>,
90  const queue<_Tp, _Container>, queue<_Tp, _Container>>;
91 
92  public:
93  // Standard declares this as template accepting unconstrained
94  // ParseContext type.
95  constexpr typename basic_format_parse_context<_CharT>::iterator
96  parse(basic_format_parse_context<_CharT>& __pc)
97  { return _M_f.parse(__pc); }
98 
99  // Standard declares this as template accepting unconstrained
100  // FormatContext type.
101  template<typename _Out>
102  typename basic_format_context<_Out, _CharT>::iterator
103  format(__maybe_const_adaptor& __a,
104  basic_format_context<_Out, _CharT>& __fc) const
105  { return _M_f.format(__a.c, __fc); }
106 
107  private:
108  // Standard uses formatter<ref_view<_Container>, _CharT>.
109  range_formatter<_Tp, _CharT> _M_f;
110  };
111 
112  template<__format::__char _CharT, typename _Tp,
113  formattable<_CharT> _Container, typename _Compare>
114  struct formatter<priority_queue<_Tp, _Container, _Compare>, _CharT>
115  {
116  private:
117  using __maybe_const_adaptor
118  = __conditional_t<
119  __format::__const_formattable_range<_Container, _CharT>,
120  const priority_queue<_Tp, _Container, _Compare>,
121  priority_queue<_Tp, _Container, _Compare>>;
122 
123  public:
124  // Standard declares this as template accepting unconstrained
125  // ParseContext type.
126  constexpr typename basic_format_parse_context<_CharT>::iterator
127  parse(basic_format_parse_context<_CharT>& __pc)
128  { return _M_f.parse(__pc); }
129 
130  // Standard declares this as template accepting unconstrained
131  // FormatContext type.
132  template<typename _Out>
133  typename basic_format_context<_Out, _CharT>::iterator
134  format(__maybe_const_adaptor& __a,
135  basic_format_context<_Out, _CharT>& __fc) const
136  { return _M_f.format(__a.c, __fc); }
137 
138  private:
139  // Standard uses formatter<ref_view<_Container>, _CharT>.
140  range_formatter<_Tp, _CharT> _M_f;
141  };
142 
143 _GLIBCXX_END_NAMESPACE_VERSION
144 } // namespace std
145 #endif // __glibcxx_format_ranges
146 
147 
148 #endif /* _GLIBCXX_QUEUE */