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_EQUAL_RANGE_H 10 #define _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H 11 12 #include <__algorithm/equal_range.h> 13 #include <__algorithm/iterator_operations.h> 14 #include <__config> 15 #include <__functional/identity.h> 16 #include <__functional/invoke.h> 17 #include <__functional/ranges_operations.h> 18 #include <__iterator/concepts.h> 19 #include <__iterator/iterator_traits.h> 20 #include <__iterator/projected.h> 21 #include <__ranges/access.h> 22 #include <__ranges/concepts.h> 23 #include <__ranges/dangling.h> 24 #include <__ranges/subrange.h> 25 #include <__utility/forward.h> 26 #include <__utility/move.h> 27 #include <__utility/pair.h> 28 29 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 30 # pragma GCC system_header 31 #endif 32 33 _LIBCPP_PUSH_MACROS 34 #include <__undef_macros> 35 36 #if _LIBCPP_STD_VER >= 20 37 38 _LIBCPP_BEGIN_NAMESPACE_STD 39 40 namespace ranges { 41 namespace __equal_range { 42 43 struct __fn { 44 template <forward_iterator _Iter, 45 sentinel_for<_Iter> _Sent, 46 class _Tp, 47 class _Proj = identity, 48 indirect_strict_weak_order<const _Tp*, projected<_Iter, _Proj>> _Comp = ranges::less> 49 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter> operator__fn50 operator()(_Iter __first, _Sent __last, const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const { 51 auto __ret = std::__equal_range<_RangeAlgPolicy>(std::move(__first), std::move(__last), __value, __comp, __proj); 52 return {std::move(__ret.first), std::move(__ret.second)}; 53 } 54 55 template <forward_range _Range, 56 class _Tp, 57 class _Proj = identity, 58 indirect_strict_weak_order<const _Tp*, projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less> 59 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range> operator__fn60 operator()(_Range&& __range, const _Tp& __value, _Comp __comp = {}, _Proj __proj = {}) const { 61 auto __ret = 62 std::__equal_range<_RangeAlgPolicy>(ranges::begin(__range), ranges::end(__range), __value, __comp, __proj); 63 return {std::move(__ret.first), std::move(__ret.second)}; 64 } 65 }; 66 67 } // namespace __equal_range 68 69 inline namespace __cpo { 70 inline constexpr auto equal_range = __equal_range::__fn{}; 71 } // namespace __cpo 72 } // namespace ranges 73 74 _LIBCPP_END_NAMESPACE_STD 75 76 #endif // _LIBCPP_STD_VER >= 20 77 78 _LIBCPP_POP_MACROS 79 80 #endif // _LIBCPP___ALGORITHM_RANGES_EQUAL_RANGE_H 81