1// -*- C++ -*-
 2//===----------------------------------------------------------------------===//
 3//
 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 5// See https://llvm.org/LICENSE.txt for license information.
 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 7//
 8//===----------------------------------------------------------------------===//
 9
10#ifndef _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H
11#define _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H
12
13#include <__config>
14#include <__cstddef/ptrdiff_t.h>
15#include <__iterator/iterator.h>
16#include <__iterator/iterator_traits.h>
17#include <__memory/addressof.h>
18#include <__utility/move.h>
19
20#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
21#  pragma GCC system_header
22#endif
23
24_LIBCPP_PUSH_MACROS
25#include <__undef_macros>
26
27_LIBCPP_BEGIN_NAMESPACE_STD
28
29#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR)
30
31_LIBCPP_SUPPRESS_DEPRECATED_PUSH
32template <class _OutputIterator, class _Tp>
33class _LIBCPP_DEPRECATED_IN_CXX17 raw_storage_iterator
34#  if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
35    : public iterator<output_iterator_tag, void, void, void, void>
36#  endif
37{
38  _LIBCPP_SUPPRESS_DEPRECATED_POP
39
40private:
41  _OutputIterator __x_;
42
43public:
44  typedef output_iterator_tag iterator_category;
45  typedef void value_type;
46#  if _LIBCPP_STD_VER >= 20
47  typedef ptrdiff_t difference_type;
48#  else
49  typedef void difference_type;
50#  endif
51  typedef void pointer;
52  typedef void reference;
53
54  _LIBCPP_HIDE_FROM_ABI explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {}
55  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator*() { return *this; }
56  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator=(const _Tp& __element) {
57    ::new ((void*)std::addressof(*__x_)) _Tp(__element);
58    return *this;
59  }
60#  if _LIBCPP_STD_VER >= 14
61  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator=(_Tp&& __element) {
62    ::new ((void*)std::addressof(*__x_)) _Tp(std::move(__element));
63    return *this;
64  }
65#  endif
66  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator++() {
67    ++__x_;
68    return *this;
69  }
70  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator operator++(int) {
71    raw_storage_iterator __t(*this);
72    ++__x_;
73    return __t;
74  }
75#  if _LIBCPP_STD_VER >= 14
76  _LIBCPP_HIDE_FROM_ABI _OutputIterator base() const { return __x_; }
77#  endif
78};
79
80#endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR)
81
82_LIBCPP_END_NAMESPACE_STD
83
84_LIBCPP_POP_MACROS
85
86#endif // _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H