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 <__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_BEGIN_NAMESPACE_STD
  26
  27 #if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR)
  28
  29 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
  30 template <class _OutputIterator, class _Tp>
  31 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 raw_storage_iterator
  32 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
  33     : public iterator<output_iterator_tag, void, void, void, void>
  34 #endif
  35 {
  36 _LIBCPP_SUPPRESS_DEPRECATED_POP
  37 private:
  38     _OutputIterator __x_;
  39 public:
  40     typedef output_iterator_tag iterator_category;
  41     typedef void                value_type;
  42 #if _LIBCPP_STD_VER >= 20
  43     typedef ptrdiff_t           difference_type;
  44 #else
  45     typedef void                difference_type;
  46 #endif
  47     typedef void                pointer;
  48     typedef void                reference;
  49
  50     _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {}
  51     _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;}
  52     _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element)
  53         {::new ((void*)_VSTD::addressof(*__x_)) _Tp(__element); return *this;}
  54 #if _LIBCPP_STD_VER >= 14
  55     _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element)
  56         {::new ((void*)_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;}
  57 #endif
  58     _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;}
  59     _LIBCPP_INLINE_VISIBILITY raw_storage_iterator  operator++(int)
  60         {raw_storage_iterator __t(*this); ++__x_; return __t;}
  61 #if _LIBCPP_STD_VER >= 14
  62     _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; }
  63 #endif
  64 };
  65
  66 #endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR)
  67
  68 _LIBCPP_END_NAMESPACE_STD
  69
  70 #endif // _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H