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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_ITERATOR_CONCEPT_H
#define _LIBCPP___ALGORITHM_RANGES_ITERATOR_CONCEPT_H
#include <__config>
#include <__iterator/concepts.h>
#include <__iterator/iterator_traits.h>
#include <__type_traits/remove_cvref.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if _LIBCPP_STD_VER >= 20
_LIBCPP_BEGIN_NAMESPACE_STD
namespace ranges {
template <class _IterMaybeQualified>
consteval auto __get_iterator_concept() {
using _Iter = __remove_cvref_t<_IterMaybeQualified>;
if constexpr (contiguous_iterator<_Iter>)
return contiguous_iterator_tag();
else if constexpr (random_access_iterator<_Iter>)
return random_access_iterator_tag();
else if constexpr (bidirectional_iterator<_Iter>)
return bidirectional_iterator_tag();
else if constexpr (forward_iterator<_Iter>)
return forward_iterator_tag();
else if constexpr (input_iterator<_Iter>)
return input_iterator_tag();
}
template <class _Iter>
using __iterator_concept = decltype(__get_iterator_concept<_Iter>());
} // namespace ranges
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_STD_VER >= 20
#endif // _LIBCPP___ALGORITHM_RANGES_ITERATOR_CONCEPT_H
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