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//===----------------------------------------------------------------------===//
//
// 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___ALGORITHM_RANGES_IS_PERMUTATION_H
#define _LIBCPP___ALGORITHM_RANGES_IS_PERMUTATION_H
#include <__algorithm/is_permutation.h>
#include <__algorithm/iterator_operations.h>
#include <__config>
#include <__functional/identity.h>
#include <__functional/ranges_operations.h>
#include <__iterator/concepts.h>
#include <__iterator/distance.h>
#include <__iterator/projected.h>
#include <__ranges/access.h>
#include <__ranges/concepts.h>
#include <__utility/move.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
_LIBCPP_BEGIN_NAMESPACE_STD
namespace ranges {
namespace __is_permutation {
struct __fn {
template <class _Iter1, class _Sent1, class _Iter2, class _Sent2,
class _Proj1, class _Proj2, class _Pred>
_LIBCPP_HIDE_FROM_ABI constexpr static
bool __is_permutation_func_impl(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
_Pred& __pred, _Proj1& __proj1, _Proj2& __proj2) {
return std::__is_permutation<_RangeAlgPolicy>(
std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2),
__pred, __proj1, __proj2);
}
template <forward_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
class _Proj1 = identity,
class _Proj2 = identity,
indirect_equivalence_relation<projected<_Iter1, _Proj1>,
projected<_Iter2, _Proj2>> _Pred = ranges::equal_to>
_LIBCPP_HIDE_FROM_ABI constexpr
bool operator()(_Iter1 __first1, _Sent1 __last1, _Iter2 __first2, _Sent2 __last2,
_Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const {
return __is_permutation_func_impl(
std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2),
__pred, __proj1, __proj2);
}
template <forward_range _Range1,
forward_range _Range2,
class _Proj1 = identity,
class _Proj2 = identity,
indirect_equivalence_relation<projected<iterator_t<_Range1>, _Proj1>, projected<iterator_t<_Range2>, _Proj2>> _Pred = ranges::equal_to>
_LIBCPP_HIDE_FROM_ABI constexpr
bool operator()(_Range1&& __range1, _Range2&& __range2,
_Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const {
if constexpr (sized_range<_Range1> && sized_range<_Range2>) {
if (ranges::distance(__range1) != ranges::distance(__range2))
return false;
}
return __is_permutation_func_impl(
ranges::begin(__range1), ranges::end(__range1), ranges::begin(__range2), ranges::end(__range2),
__pred, __proj1, __proj2);
}
};
} // namespace __is_permutation
inline namespace __cpo {
inline constexpr auto is_permutation = __is_permutation::__fn{};
} // namespace __cpo
} // namespace ranges
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
#endif // _LIBCPP___ALGORITHM_RANGES_IS_PERMUTATION_H
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