forked from OSchip/llvm-project
186 lines
6.4 KiB
C++
186 lines
6.4 KiB
C++
// -*- 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___ITERATOR_MOVE_ITERATOR_H
|
|
#define _LIBCPP___ITERATOR_MOVE_ITERATOR_H
|
|
|
|
#include <__config>
|
|
#include <__iterator/iterator_traits.h>
|
|
#include <__utility/move.h>
|
|
#include <type_traits>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
template <class _Iter>
|
|
class _LIBCPP_TEMPLATE_VIS move_iterator
|
|
{
|
|
public:
|
|
#if _LIBCPP_STD_VER > 17
|
|
typedef input_iterator_tag iterator_concept;
|
|
#endif
|
|
|
|
typedef _Iter iterator_type;
|
|
typedef _If<
|
|
__is_cpp17_random_access_iterator<_Iter>::value,
|
|
random_access_iterator_tag,
|
|
typename iterator_traits<_Iter>::iterator_category
|
|
> iterator_category;
|
|
typedef typename iterator_traits<iterator_type>::value_type value_type;
|
|
typedef typename iterator_traits<iterator_type>::difference_type difference_type;
|
|
typedef iterator_type pointer;
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
typedef typename iterator_traits<iterator_type>::reference __reference;
|
|
typedef typename conditional<
|
|
is_reference<__reference>::value,
|
|
typename remove_reference<__reference>::type&&,
|
|
__reference
|
|
>::type reference;
|
|
#else
|
|
typedef typename iterator_traits<iterator_type>::reference reference;
|
|
#endif
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator() : __current_() {}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
explicit move_iterator(_Iter __i) : __current_(_VSTD::move(__i)) {}
|
|
|
|
template <class _Up, class = __enable_if_t<
|
|
!is_same<_Up, _Iter>::value && is_convertible<const _Up&, _Iter>::value
|
|
> >
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator(const move_iterator<_Up>& __u) : __current_(__u.base()) {}
|
|
|
|
template <class _Up, class = __enable_if_t<
|
|
!is_same<_Up, _Iter>::value &&
|
|
is_convertible<const _Up&, _Iter>::value &&
|
|
is_assignable<_Iter&, const _Up&>::value
|
|
> >
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator& operator=(const move_iterator<_Up>& __u) {
|
|
__current_ = __u.base();
|
|
return *this;
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
_Iter base() const { return __current_; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
reference operator*() const { return static_cast<reference>(*__current_); }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
pointer operator->() const { return __current_; }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
reference operator[](difference_type __n) const { return static_cast<reference>(__current_[__n]); }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator& operator++() { ++__current_; return *this; }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator operator++(int) { move_iterator __tmp(*this); ++__current_; return __tmp; }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator& operator--() { --__current_; return *this; }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator operator--(int) { move_iterator __tmp(*this); --__current_; return __tmp; }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator operator+(difference_type __n) const { return move_iterator(__current_ + __n); }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator& operator+=(difference_type __n) { __current_ += __n; return *this; }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator operator-(difference_type __n) const { return move_iterator(__current_ - __n); }
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator& operator-=(difference_type __n) { __current_ -= __n; return *this; }
|
|
|
|
private:
|
|
_Iter __current_;
|
|
};
|
|
|
|
template <class _Iter1, class _Iter2>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
bool operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
|
|
{
|
|
return __x.base() == __y.base();
|
|
}
|
|
|
|
template <class _Iter1, class _Iter2>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
bool operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
|
|
{
|
|
return __x.base() != __y.base();
|
|
}
|
|
|
|
template <class _Iter1, class _Iter2>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
bool operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
|
|
{
|
|
return __x.base() < __y.base();
|
|
}
|
|
|
|
template <class _Iter1, class _Iter2>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
bool operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
|
|
{
|
|
return __x.base() > __y.base();
|
|
}
|
|
|
|
template <class _Iter1, class _Iter2>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
bool operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
|
|
{
|
|
return __x.base() <= __y.base();
|
|
}
|
|
|
|
template <class _Iter1, class _Iter2>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
bool operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
|
|
{
|
|
return __x.base() >= __y.base();
|
|
}
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
template <class _Iter1, class _Iter2>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
auto operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
|
|
-> decltype(__x.base() - __y.base())
|
|
{
|
|
return __x.base() - __y.base();
|
|
}
|
|
#else
|
|
template <class _Iter1, class _Iter2>
|
|
inline _LIBCPP_HIDE_FROM_ABI
|
|
typename move_iterator<_Iter1>::difference_type
|
|
operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
|
|
{
|
|
return __x.base() - __y.base();
|
|
}
|
|
#endif
|
|
|
|
template <class _Iter>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator<_Iter>
|
|
operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x)
|
|
{
|
|
return move_iterator<_Iter>(__x.base() + __n);
|
|
}
|
|
|
|
template <class _Iter>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX14
|
|
move_iterator<_Iter>
|
|
make_move_iterator(_Iter __i)
|
|
{
|
|
return move_iterator<_Iter>(_VSTD::move(__i));
|
|
}
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___ITERATOR_MOVE_ITERATOR_H
|