contrib/llvm-project/libcxx/include/__memory/raw_storage_iterator.h

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