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_UNIQUE_H 10 #define _LIBCPP___ALGORITHM_RANGES_UNIQUE_H 11 12 #include <__algorithm/iterator_operations.h> 13 #include <__algorithm/make_projected.h> 14 #include <__algorithm/unique.h> 15 #include <__config> 16 #include <__functional/identity.h> 17 #include <__functional/invoke.h> 18 #include <__functional/ranges_operations.h> 19 #include <__iterator/concepts.h> 20 #include <__iterator/iterator_traits.h> 21 #include <__iterator/permutable.h> 22 #include <__iterator/projected.h> 23 #include <__ranges/access.h> 24 #include <__ranges/concepts.h> 25 #include <__ranges/dangling.h> 26 #include <__ranges/subrange.h> 27 #include <__utility/forward.h> 28 #include <__utility/move.h> 29 #include <__utility/pair.h> 30 31 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 32 # pragma GCC system_header 33 #endif 34 35 _LIBCPP_PUSH_MACROS 36 #include <__undef_macros> 37 38 #if _LIBCPP_STD_VER >= 20 39 40 _LIBCPP_BEGIN_NAMESPACE_STD 41 42 namespace ranges { 43 namespace __unique { 44 45 struct __fn { 46 template <permutable _Iter, 47 sentinel_for<_Iter> _Sent, 48 class _Proj = identity, 49 indirect_equivalence_relation<projected<_Iter, _Proj>> _Comp = ranges::equal_to> 50 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter> 51 operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const { 52 auto __ret = 53 std::__unique<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::__make_projected(__comp, __proj)); 54 return {std::move(__ret.first), std::move(__ret.second)}; 55 } 56 57 template <forward_range _Range, 58 class _Proj = identity, 59 indirect_equivalence_relation<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::equal_to> 60 requires permutable<iterator_t<_Range>> 61 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range> 62 operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const { 63 auto __ret = std::__unique<_RangeAlgPolicy>( 64 ranges::begin(__range), ranges::end(__range), std::__make_projected(__comp, __proj)); 65 return {std::move(__ret.first), std::move(__ret.second)}; 66 } 67 }; 68 69 } // namespace __unique 70 71 inline namespace __cpo { 72 inline constexpr auto unique = __unique::__fn{}; 73 } // namespace __cpo 74 } // namespace ranges 75 76 _LIBCPP_END_NAMESPACE_STD 77 78 #endif // _LIBCPP_STD_VER >= 20 79 80 _LIBCPP_POP_MACROS 81 82 #endif // _LIBCPP___ALGORITHM_RANGES_UNIQUE_H 83