| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| _LIBCPP_PUSH_MACROS |
| #include <__undef_macros> |
| |
| #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(std::move(__first_un), std::move(__last_un), __value, __proj)); |
| } else { |
| return std::__find(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*> |
| [[nodiscard]] _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*> |
| [[nodiscard]] _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 |
| |
| _LIBCPP_POP_MACROS |
| |
| #endif // _LIBCPP___ALGORITHM_RANGES_FIND_H |