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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_FIRST_OF_H
#define _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H
#include <__config>
#include <__functional/identity.h>
#include <__functional/invoke.h>
#include <__functional/ranges_operations.h>
#include <__iterator/concepts.h>
#include <__iterator/indirectly_comparable.h>
#include <__ranges/access.h>
#include <__ranges/concepts.h>
#include <__ranges/dangling.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_first_of {
struct __fn {
template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Pred, class _Proj1, class _Proj2>
_LIBCPP_HIDE_FROM_ABI constexpr static _Iter1 __find_first_of_impl(
_Iter1 __first1,
_Sent1 __last1,
_Iter2 __first2,
_Sent2 __last2,
_Pred& __pred,
_Proj1& __proj1,
_Proj2& __proj2) {
for (; __first1 != __last1; ++__first1) {
for (auto __j = __first2; __j != __last2; ++__j) {
if (std::invoke(__pred, std::invoke(__proj1, *__first1), std::invoke(__proj2, *__j)))
return __first1;
}
}
return __first1;
}
template <input_iterator _Iter1,
sentinel_for<_Iter1> _Sent1,
forward_iterator _Iter2,
sentinel_for<_Iter2> _Sent2,
class _Pred = ranges::equal_to,
class _Proj1 = identity,
class _Proj2 = identity>
requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr _Iter1 operator()(
_Iter1 __first1,
_Sent1 __last1,
_Iter2 __first2,
_Sent2 __last2,
_Pred __pred = {},
_Proj1 __proj1 = {},
_Proj2 __proj2 = {}) const {
return __find_first_of_impl(
std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), __pred, __proj1, __proj2);
}
template <input_range _Range1,
forward_range _Range2,
class _Pred = ranges::equal_to,
class _Proj1 = identity,
class _Proj2 = identity>
requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2>
_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range1> operator()(
_Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const {
return __find_first_of_impl(
ranges::begin(__range1),
ranges::end(__range1),
ranges::begin(__range2),
ranges::end(__range2),
__pred,
__proj1,
__proj2);
}
};
} // namespace __find_first_of
inline namespace __cpo {
inline constexpr auto find_first_of = __find_first_of::__fn{};
} // namespace __cpo
} // namespace ranges
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_STD_VER >= 20
#endif // _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H
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