190 lines
6.5 KiB
C++
190 lines
6.5 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ITERATOR_MOVE_ITERATOR_H
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#define _LIBCPP___ITERATOR_MOVE_ITERATOR_H
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#include <__config>
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#include <__iterator/iterator_traits.h>
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#include <type_traits>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Iter>
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class _LIBCPP_TEMPLATE_VIS move_iterator
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{
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private:
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_Iter __i;
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public:
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typedef _Iter iterator_type;
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typedef typename iterator_traits<iterator_type>::value_type value_type;
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typedef typename iterator_traits<iterator_type>::difference_type difference_type;
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typedef iterator_type pointer;
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typedef _If<__is_cpp17_random_access_iterator<_Iter>::value,
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random_access_iterator_tag,
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typename iterator_traits<_Iter>::iterator_category> iterator_category;
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#if _LIBCPP_STD_VER > 17
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typedef input_iterator_tag iterator_concept;
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#endif
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#ifndef _LIBCPP_CXX03_LANG
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typedef typename iterator_traits<iterator_type>::reference __reference;
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typedef typename conditional<
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is_reference<__reference>::value,
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typename remove_reference<__reference>::type&&,
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__reference
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>::type reference;
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#else
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typedef typename iterator_traits<iterator_type>::reference reference;
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#endif
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator() : __i() {}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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explicit move_iterator(_Iter __x) : __i(__x) {}
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template <class _Up, class = _EnableIf<
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!is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value
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> >
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {}
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template <class _Up, class = _EnableIf<
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!is_same<_Up, _Iter>::value &&
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is_convertible<_Up const&, _Iter>::value &&
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is_assignable<_Iter&, _Up const&>::value
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> >
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator& operator=(const move_iterator<_Up>& __u) {
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__i = __u.base();
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return *this;
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}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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reference operator*() const { return static_cast<reference>(*__i); }
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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pointer operator->() const { return __i;}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator& operator++() {++__i; return *this;}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator& operator--() {--__i; return *this;}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator& operator+=(difference_type __n) {__i += __n; return *this;}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;}
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); }
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};
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template <class _Iter1, class _Iter2>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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bool
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operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
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{
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return __x.base() == __y.base();
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}
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template <class _Iter1, class _Iter2>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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bool
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operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
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{
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return __x.base() < __y.base();
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}
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template <class _Iter1, class _Iter2>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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bool
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operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
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{
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return __x.base() != __y.base();
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}
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template <class _Iter1, class _Iter2>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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bool
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operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
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{
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return __x.base() > __y.base();
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}
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template <class _Iter1, class _Iter2>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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bool
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operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
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{
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return __x.base() >= __y.base();
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}
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template <class _Iter1, class _Iter2>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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bool
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operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
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{
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return __x.base() <= __y.base();
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}
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#ifndef _LIBCPP_CXX03_LANG
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template <class _Iter1, class _Iter2>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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auto
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operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
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-> decltype(__x.base() - __y.base())
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{
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return __x.base() - __y.base();
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}
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#else
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template <class _Iter1, class _Iter2>
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inline _LIBCPP_INLINE_VISIBILITY
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typename move_iterator<_Iter1>::difference_type
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operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
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{
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return __x.base() - __y.base();
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}
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#endif
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template <class _Iter>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator<_Iter>
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operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x)
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{
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return move_iterator<_Iter>(__x.base() + __n);
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}
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template <class _Iter>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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move_iterator<_Iter>
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make_move_iterator(_Iter __i)
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{
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return move_iterator<_Iter>(__i);
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}
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_LIBCPP_END_NAMESPACE_STD
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ITERATOR_MOVE_ITERATOR_H
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