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 <__iterator/iterator.h>
15 #include <__iterator/iterator_traits.h>
16 #include <__memory/addressof.h>
17 #include <__utility/move.h>
18 #include <cstddef>
19 #include <new>
20 
21 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
22 #  pragma GCC system_header
23 #endif
24 
25 _LIBCPP_PUSH_MACROS
26 #include <__undef_macros>
27 
28 _LIBCPP_BEGIN_NAMESPACE_STD
29 
30 #if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR)
31 
32 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
33 template <class _OutputIterator, class _Tp>
34 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 raw_storage_iterator
35 #  if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
36     : public iterator<output_iterator_tag, void, void, void, void>
37 #  endif
38 {
39   _LIBCPP_SUPPRESS_DEPRECATED_POP
40 
41 private:
42   _OutputIterator __x_;
43 
44 public:
45   typedef output_iterator_tag iterator_category;
46   typedef void value_type;
47 #  if _LIBCPP_STD_VER >= 20
48   typedef ptrdiff_t difference_type;
49 #  else
50   typedef void difference_type;
51 #  endif
52   typedef void pointer;
53   typedef void reference;
54 
55   _LIBCPP_HIDE_FROM_ABI explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {}
56   _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator*() { return *this; }
57   _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator=(const _Tp& __element) {
58     ::new ((void*)std::addressof(*__x_)) _Tp(__element);
59     return *this;
60   }
61 #  if _LIBCPP_STD_VER >= 14
62   _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator=(_Tp&& __element) {
63     ::new ((void*)std::addressof(*__x_)) _Tp(std::move(__element));
64     return *this;
65   }
66 #  endif
67   _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator++() {
68     ++__x_;
69     return *this;
70   }
71   _LIBCPP_HIDE_FROM_ABI raw_storage_iterator operator++(int) {
72     raw_storage_iterator __t(*this);
73     ++__x_;
74     return __t;
75   }
76 #  if _LIBCPP_STD_VER >= 14
77   _LIBCPP_HIDE_FROM_ABI _OutputIterator base() const { return __x_; }
78 #  endif
79 };
80 
81 #endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR)
82 
83 _LIBCPP_END_NAMESPACE_STD
84 
85 _LIBCPP_POP_MACROS
86 
87 #endif // _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H
88