libstdc++
erase_if.h
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1 // <bits/erase_if.h> -*- C++ -*-
2 
3 // Copyright (C) 2015-2019 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 bits/erase_if.h
26  * This is an internal header file, included by other library headers.
27  * Do not attempt to use it directly.
28  */
29 
30 #ifndef _GLIBCXX_ERASE_IF_H
31 #define _GLIBCXX_ERASE_IF_H 1
32 
33 #pragma GCC system_header
34 
35 #if __cplusplus >= 201402L
36 
37 namespace std
38 {
39 _GLIBCXX_BEGIN_NAMESPACE_VERSION
40 
41 #if __cplusplus > 201703L
42 # define __cpp_lib_erase_if 201900L
43 #endif
44 
45  namespace __detail
46  {
47  template<typename _Container, typename _Predicate>
48  typename _Container::size_type
49  __erase_nodes_if(_Container& __cont, _Predicate __pred)
50  {
51  typename _Container::size_type __num = 0;
52  for (auto __iter = __cont.begin(), __last = __cont.end();
53  __iter != __last;)
54  {
55  if (__pred(*__iter))
56  {
57  __iter = __cont.erase(__iter);
58  ++__num;
59  }
60  else
61  ++__iter;
62  }
63  return __num;
64  }
65  } // namespace __detail
66 
67 _GLIBCXX_END_NAMESPACE_VERSION
68 } // namespace std
69 
70 #endif // C++14
71 
72 #endif // _GLIBCXX_ERASE_IF_H
ISO C++ entities toplevel namespace is std.