libcxx/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 <__memory/addressof.h>
#include <cstddef>
#include <iterator>
#include <utility>

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

_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 > 17
    typedef ptrdiff_t           difference_type;
#else
    typedef void                difference_type;
#endif
    typedef void                pointer;
    typedef void                reference;

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

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

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___MEMORY_RAW_STORAGE_ITERATOR_H