chromium/third_party/libc++/src/include/__iterator/wrap_iter.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___ITERATOR_WRAP_ITER_H
#define _LIBCPP___ITERATOR_WRAP_ITER_H

#include <__compare/ordering.h>
#include <__compare/three_way_comparable.h>
#include <__config>
#include <__iterator/iterator_traits.h>
#include <__memory/addressof.h>
#include <__memory/pointer_traits.h>
#include <__type_traits/enable_if.h>
#include <__type_traits/is_convertible.h>
#include <cstddef>

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

_LIBCPP_BEGIN_NAMESPACE_STD

template <class _Iter>
class __wrap_iter { … };

template <class _Iter1>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT { … }

template <class _Iter1, class _Iter2>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { … }

template <class _Iter1>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool
operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT { … }

template <class _Iter1, class _Iter2>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool
operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT { … }

#if _LIBCPP_STD_VER <= 17
template <class _Iter1>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT {
  return !(__x == __y);
}

template <class _Iter1, class _Iter2>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
  return !(__x == __y);
}
template <class _Iter1>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT {
  return __y < __x;
}

template <class _Iter1, class _Iter2>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
  return __y < __x;
}

template <class _Iter1>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT {
  return !(__x < __y);
}

template <class _Iter1, class _Iter2>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
  return !(__x < __y);
}

template <class _Iter1>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT {
  return !(__y < __x);
}

template <class _Iter1, class _Iter2>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR bool
operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT {
  return !(__y < __x);
}

#else
template <class _Iter1, class _Iter2>
_LIBCPP_HIDE_FROM_ABI constexpr strong_ordering
operator<=>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) noexcept { … }
#endif // _LIBCPP_STD_VER >= 20

template <class _Iter1, class _Iter2>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
#ifndef _LIBCPP_CXX03_LANG
    auto
    operator-(const __wrap_iter<_Iter1>& __x,
              const __wrap_iter<_Iter2>& __y) _NOEXCEPT->decltype(__x.base() - __y.base())
#else
typename __wrap_iter<_Iter1>::difference_type
operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT
#endif // C++03
{ … }

template <class _Iter1>
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __wrap_iter<_Iter1>
operator+(typename __wrap_iter<_Iter1>::difference_type __n, __wrap_iter<_Iter1> __x) _NOEXCEPT { … }

#if _LIBCPP_STD_VER <= 17
template <class _It>
struct __libcpp_is_contiguous_iterator<__wrap_iter<_It> > : true_type {};
#endif

pointer_traits<__wrap_iter<_It>>;

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP___ITERATOR_WRAP_ITER_H