libstdc++
stl_raw_storage_iter.h
Go to the documentation of this file.
1 // -*- C++ -*-
2 
3 // Copyright (C) 2001-2020 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
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 bits/stl_raw_storage_iter.h
52  * This is an internal header file, included by other library headers.
53  * Do not attempt to use it directly. @headername{memory}
54  */
55 
56 #ifndef _STL_RAW_STORAGE_ITERATOR_H
57 #define _STL_RAW_STORAGE_ITERATOR_H 1
58 
59 namespace std _GLIBCXX_VISIBILITY(default)
60 {
61 _GLIBCXX_BEGIN_NAMESPACE_VERSION
62 
63  /**
64  * This iterator class lets algorithms store their results into
65  * uninitialized memory.
66  */
67  template <class _OutputIterator, class _Tp>
69  : public iterator<output_iterator_tag, void, void, void, void>
70  {
71  protected:
72  _OutputIterator _M_iter;
73 
74  public:
75  explicit
76  raw_storage_iterator(_OutputIterator __x)
77  : _M_iter(__x) {}
78 
80  operator*() { return *this; }
81 
83  operator=(const _Tp& __element)
84  {
85  std::_Construct(std::__addressof(*_M_iter), __element);
86  return *this;
87  }
88 
89 #if __cplusplus >= 201103L
90  // _GLIBCXX_RESOLVE_LIB_DEFECTS
91  // 2127. Move-construction with raw_storage_iterator
93  operator=(_Tp&& __element)
94  {
95  std::_Construct(std::__addressof(*_M_iter), std::move(__element));
96  return *this;
97  }
98 #endif
99 
101  operator++()
102  {
103  ++_M_iter;
104  return *this;
105  }
106 
108  operator++(int)
109  {
110  raw_storage_iterator __tmp = *this;
111  ++_M_iter;
112  return __tmp;
113  }
114 
115  // _GLIBCXX_RESOLVE_LIB_DEFECTS
116  // 2454. Add raw_storage_iterator::base() member
117  _OutputIterator base() const { return _M_iter; }
118  };
119 
120 _GLIBCXX_END_NAMESPACE_VERSION
121 } // namespace
122 
123 #endif
constexpr _Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
Definition: move.h:49
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
Definition: move.h:101
ISO C++ entities toplevel namespace is std.
void _Construct(_Tp *__p, _Args &&... __args)
Common iterator class.