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| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H |
| 10 | #define _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H |
| 11 | |
| 12 | #include <__config> |
| 13 | #include <__functional/identity.h> |
| 14 | #include <__functional/invoke.h> |
| 15 | #include <__functional/ranges_operations.h> |
| 16 | #include <__iterator/concepts.h> |
| 17 | #include <__iterator/indirectly_comparable.h> |
| 18 | #include <__ranges/access.h> |
| 19 | #include <__ranges/concepts.h> |
| 20 | #include <__ranges/dangling.h> |
| 21 | #include <__utility/move.h> |
| 22 | |
| 23 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 24 | # pragma GCC system_header |
| 25 | #endif |
| 26 | |
| 27 | _LIBCPP_PUSH_MACROS |
| 28 | #include <__undef_macros> |
| 29 | |
| 30 | #if _LIBCPP_STD_VER >= 20 |
| 31 | |
| 32 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 33 | |
| 34 | namespace ranges { |
| 35 | struct __find_first_of { |
| 36 | template <class _Iter1, class _Sent1, class _Iter2, class _Sent2, class _Pred, class _Proj1, class _Proj2> |
| 37 | _LIBCPP_HIDE_FROM_ABI constexpr static _Iter1 __find_first_of_impl( |
| 38 | _Iter1 __first1, |
| 39 | _Sent1 __last1, |
| 40 | _Iter2 __first2, |
| 41 | _Sent2 __last2, |
| 42 | _Pred& __pred, |
| 43 | _Proj1& __proj1, |
| 44 | _Proj2& __proj2) { |
| 45 | for (; __first1 != __last1; ++__first1) { |
| 46 | for (auto __j = __first2; __j != __last2; ++__j) { |
| 47 | if (std::invoke(__pred, std::invoke(__proj1, *__first1), std::invoke(__proj2, *__j))) |
| 48 | return __first1; |
| 49 | } |
| 50 | } |
| 51 | return __first1; |
| 52 | } |
| 53 | |
| 54 | template <input_iterator _Iter1, |
| 55 | sentinel_for<_Iter1> _Sent1, |
| 56 | forward_iterator _Iter2, |
| 57 | sentinel_for<_Iter2> _Sent2, |
| 58 | class _Pred = ranges::equal_to, |
| 59 | class _Proj1 = identity, |
| 60 | class _Proj2 = identity> |
| 61 | requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2> |
| 62 | [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Iter1 operator()( |
| 63 | _Iter1 __first1, |
| 64 | _Sent1 __last1, |
| 65 | _Iter2 __first2, |
| 66 | _Sent2 __last2, |
| 67 | _Pred __pred = {}, |
| 68 | _Proj1 __proj1 = {}, |
| 69 | _Proj2 __proj2 = {}) const { |
| 70 | return __find_first_of_impl( |
| 71 | std::move(__first1), std::move(__last1), std::move(__first2), std::move(__last2), __pred, __proj1, __proj2); |
| 72 | } |
| 73 | |
| 74 | template <input_range _Range1, |
| 75 | forward_range _Range2, |
| 76 | class _Pred = ranges::equal_to, |
| 77 | class _Proj1 = identity, |
| 78 | class _Proj2 = identity> |
| 79 | requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2> |
| 80 | [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range1> operator()( |
| 81 | _Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const { |
| 82 | return __find_first_of_impl( |
| 83 | ranges::begin(__range1), |
| 84 | ranges::end(__range1), |
| 85 | ranges::begin(__range2), |
| 86 | ranges::end(__range2), |
| 87 | __pred, |
| 88 | __proj1, |
| 89 | __proj2); |
| 90 | } |
| 91 | }; |
| 92 | |
| 93 | inline namespace __cpo { |
| 94 | inline constexpr auto find_first_of = __find_first_of{}; |
| 95 | } // namespace __cpo |
| 96 | } // namespace ranges |
| 97 | |
| 98 | _LIBCPP_END_NAMESPACE_STD |
| 99 | |
| 100 | #endif // _LIBCPP_STD_VER >= 20 |
| 101 | |
| 102 | _LIBCPP_POP_MACROS |
| 103 | |
| 104 | #endif // _LIBCPP___ALGORITHM_RANGES_FIND_FIRST_OF_H |
| 105 |
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