forked from OSchip/llvm-project
102 lines
3.8 KiB
C++
102 lines
3.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H
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#define _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H
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#include <__config>
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#include <__functional/identity.h>
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#include <__functional/invoke.h>
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#include <__functional/ranges_operations.h>
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#include <__iterator/concepts.h>
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#include <__iterator/indirectly_comparable.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__ranges/dangling.h>
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#include <__utility/move.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace ranges {
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namespace __find_first_of {
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struct __fn {
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template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Pred, class _Proj1, class _Proj2>
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_LIBCPP_HIDE_FROM_ABI constexpr static
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_Iter1 __find_first_of_impl(_Iter1 __first1, _Sent1 __last1,
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_Iter2 __first2, _Sent2 __last2,
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_Pred& __pred,
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_Proj1& __proj1,
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_Proj2& __proj2) {
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for (; __first1 != __last1; ++__first1) {
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for (auto __j = __first2; __j != __last2; ++__j) {
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if (std::invoke(__pred, std::invoke(__proj1, *__first1), std::invoke(__proj2, *__j)))
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return __first1;
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}
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}
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return __first1;
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}
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template <input_iterator _Iter1, sentinel_for<_Iter1> _Sent1,
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forward_iterator _Iter2, sentinel_for<_Iter2> _Sent2,
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class _Pred = ranges::equal_to,
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class _Proj1 = identity,
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class _Proj2 = identity>
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requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
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_LIBCPP_HIDE_FROM_ABI constexpr
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_Iter1 operator()(_Iter1 __first1, _Sent1 __last1,
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_Iter2 __first2, _Sent2 __last2,
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_Pred __pred = {},
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_Proj1 __proj1 = {},
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_Proj2 __proj2 = {}) const {
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return __find_first_of_impl(std::move(__first1), std::move(__last1),
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std::move(__first2), std::move(__last2),
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__pred,
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__proj1,
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__proj2);
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}
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template <input_range _Range1,
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forward_range _Range2,
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class _Pred = ranges::equal_to,
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class _Proj1 = identity,
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class _Proj2 = identity>
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requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2>
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_LIBCPP_HIDE_FROM_ABI constexpr
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borrowed_iterator_t<_Range1> operator()(_Range1&& __range1,
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_Range2&& __range2,
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_Pred __pred = {},
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_Proj1 __proj1 = {},
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_Proj2 __proj2 = {}) const {
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return __find_first_of_impl(ranges::begin(__range1), ranges::end(__range1),
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ranges::begin(__range2), ranges::end(__range2),
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__pred,
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__proj1,
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__proj2);
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}
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};
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} // namespace __find_first_of
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inline namespace __cpo {
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inline constexpr auto find_first_of = __find_first_of::__fn{};
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} // namespace __cpo
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} // namespace ranges
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
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#endif // _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H
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