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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_FIND_H
#define _LIBCPP___ALGORITHM_RANGES_FIND_H
#include <__algorithm/find.h>
#include <__algorithm/ranges_find_if.h>
#include <__algorithm/unwrap_range.h>
#include <__config>
#include <__functional/identity.h>
#include <__functional/invoke.h>
#include <__functional/ranges_operations.h>
#include <__iterator/concepts.h>
#include <__iterator/projected.h>
#include <__ranges/access.h>
#include <__ranges/concepts.h>
#include <__ranges/dangling.h>
#include <__utility/forward.h>
#include <__utility/move.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 {
namespace __find {
struct __fn {
template <class _Iter, class _Sent, class _Tp, class _Proj>
_LIBCPP_HIDE_FROM_ABI static constexpr _Iter
__find_unwrap(_Iter __first, _Sent __last, const _Tp& __value, _Proj& __proj) {
if constexpr (forward_iterator<_Iter>) {
auto [__first_un, __last_un] = std::__unwrap_range(__first, std::move(__last));
return std::__rewrap_range<_Sent>(
std::move(__first), std::__find_impl(std::move(__first_un), std::move(__last_un), __value, __proj));
} else {
return std::__find_impl(std::move(__first), std::move(__last), __value, __proj);
}
}
template <input_iterator _Ip, sentinel_for<_Ip> _Sp, class _Tp, class _Proj = identity>
requires indirect_binary_predicate<ranges::equal_to, projected<_Ip, _Proj>, const _Tp*>
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr _Ip
operator()(_Ip __first, _Sp __last, const _Tp& __value, _Proj __proj = {}) const {
return __find_unwrap(std::move(__first), std::move(__last), __value, __proj);
}
template <input_range _Rp, class _Tp, class _Proj = identity>
requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Rp>, _Proj>, const _Tp*>
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Rp>
operator()(_Rp&& __r, const _Tp& __value, _Proj __proj = {}) const {
return __find_unwrap(ranges::begin(__r), ranges::end(__r), __value, __proj);
}
};
} // namespace __find
inline namespace __cpo {
inline constexpr auto find = __find::__fn{};
} // namespace __cpo
} // namespace ranges
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_STD_VER >= 20
#endif // _LIBCPP___ALGORITHM_RANGES_FIND_H
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