include/__memory/raw_storage_iterator.h

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H
#define _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H

#include <__config>
#include <__iterator/iterator.h>
#include <__iterator/iterator_traits.h>
#include <__memory/addressof.h>
#include <__utility/move.h>
#include <cstddef>
#include <new>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

_LIBCPP_PUSH_MACROS
#include <__undef_macros>

_LIBCPP_BEGIN_NAMESPACE_STD

#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR)

_LIBCPP_SUPPRESS_DEPRECATED_PUSH
template <class _OutputIterator, class _Tp>
class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 raw_storage_iterator
#  if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
    : public iterator<output_iterator_tag, void, void, void, void>
#  endif
{
  _LIBCPP_SUPPRESS_DEPRECATED_POP

private:
  _OutputIterator __x_;

public:
  typedef output_iterator_tag iterator_category;
  typedef void value_type;
#  if _LIBCPP_STD_VER >= 20
  typedef ptrdiff_t difference_type;
#  else
  typedef void difference_type;
#  endif
  typedef void pointer;
  typedef void reference;

  _LIBCPP_HIDE_FROM_ABI explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {}
  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator*() { return *this; }
  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator=(const _Tp& __element) {
    ::new ((void*)std::addressof(*__x_)) _Tp(__element);
    return *this;
  }
#  if _LIBCPP_STD_VER >= 14
  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator=(_Tp&& __element) {
    ::new ((void*)std::addressof(*__x_)) _Tp(std::move(__element));
    return *this;
  }
#  endif
  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator& operator++() {
    ++__x_;
    return *this;
  }
  _LIBCPP_HIDE_FROM_ABI raw_storage_iterator operator++(int) {
    raw_storage_iterator __t(*this);
    ++__x_;
    return __t;
  }
#  if _LIBCPP_STD_VER >= 14
  _LIBCPP_HIDE_FROM_ABI _OutputIterator base() const { return __x_; }
#  endif
};

#endif // _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR)

_LIBCPP_END_NAMESPACE_STD

_LIBCPP_POP_MACROS

#endif // _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H