1753f127fSDimitry Andric //===----------------------------------------------------------------------===// 2753f127fSDimitry Andric // 3753f127fSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4753f127fSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5753f127fSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6753f127fSDimitry Andric // 7753f127fSDimitry Andric //===----------------------------------------------------------------------===// 8753f127fSDimitry Andric 9753f127fSDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_UNIQUE_COPY_H 10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_UNIQUE_COPY_H 11753f127fSDimitry Andric 12753f127fSDimitry Andric #include <__algorithm/in_out_result.h> 1361cfbce3SDimitry Andric #include <__algorithm/iterator_operations.h> 14753f127fSDimitry Andric #include <__algorithm/make_projected.h> 15753f127fSDimitry Andric #include <__algorithm/unique_copy.h> 16753f127fSDimitry Andric #include <__concepts/same_as.h> 17753f127fSDimitry Andric #include <__config> 18753f127fSDimitry Andric #include <__functional/identity.h> 19753f127fSDimitry Andric #include <__functional/invoke.h> 20753f127fSDimitry Andric #include <__functional/ranges_operations.h> 21753f127fSDimitry Andric #include <__iterator/concepts.h> 22753f127fSDimitry Andric #include <__iterator/iterator_traits.h> 23753f127fSDimitry Andric #include <__iterator/projected.h> 24753f127fSDimitry Andric #include <__ranges/access.h> 25753f127fSDimitry Andric #include <__ranges/concepts.h> 26753f127fSDimitry Andric #include <__ranges/dangling.h> 27753f127fSDimitry Andric #include <__utility/forward.h> 28753f127fSDimitry Andric #include <__utility/move.h> 29bdd1243dSDimitry Andric #include <__utility/pair.h> 30753f127fSDimitry Andric 31753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 32753f127fSDimitry Andric # pragma GCC system_header 33753f127fSDimitry Andric #endif 34753f127fSDimitry Andric 35*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 36*b3edf446SDimitry Andric #include <__undef_macros> 37*b3edf446SDimitry Andric 3806c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 39753f127fSDimitry Andric 40753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 41753f127fSDimitry Andric 42753f127fSDimitry Andric namespace ranges { 43753f127fSDimitry Andric 44753f127fSDimitry Andric template <class _InIter, class _OutIter> 45753f127fSDimitry Andric using unique_copy_result = in_out_result<_InIter, _OutIter>; 46753f127fSDimitry Andric 47753f127fSDimitry Andric namespace __unique_copy { 48753f127fSDimitry Andric 4961cfbce3SDimitry Andric template <class _InIter, class _OutIter> 5061cfbce3SDimitry Andric concept __can_reread_from_output = (input_iterator<_OutIter> && same_as<iter_value_t<_InIter>, iter_value_t<_OutIter>>); 51753f127fSDimitry Andric 5261cfbce3SDimitry Andric struct __fn { 5361cfbce3SDimitry Andric template <class _InIter, class _OutIter> __get_algo_tag__fn5461cfbce3SDimitry Andric static consteval auto __get_algo_tag() { 5561cfbce3SDimitry Andric if constexpr (forward_iterator<_InIter>) { 5661cfbce3SDimitry Andric return __unique_copy_tags::__reread_from_input_tag{}; 5761cfbce3SDimitry Andric } else if constexpr (__can_reread_from_output<_InIter, _OutIter>) { 5861cfbce3SDimitry Andric return __unique_copy_tags::__reread_from_output_tag{}; 5961cfbce3SDimitry Andric } else if constexpr (indirectly_copyable_storable<_InIter, _OutIter>) { 6061cfbce3SDimitry Andric return __unique_copy_tags::__read_from_tmp_value_tag{}; 6161cfbce3SDimitry Andric } 6261cfbce3SDimitry Andric } 6361cfbce3SDimitry Andric 6461cfbce3SDimitry Andric template <class _InIter, class _OutIter> 6561cfbce3SDimitry Andric using __algo_tag_t = decltype(__get_algo_tag<_InIter, _OutIter>()); 6661cfbce3SDimitry Andric 6761cfbce3SDimitry Andric template <input_iterator _InIter, 6861cfbce3SDimitry Andric sentinel_for<_InIter> _Sent, 6961cfbce3SDimitry Andric weakly_incrementable _OutIter, 7061cfbce3SDimitry Andric class _Proj = identity, 71753f127fSDimitry Andric indirect_equivalence_relation<projected<_InIter, _Proj>> _Comp = ranges::equal_to> 72753f127fSDimitry Andric requires indirectly_copyable<_InIter, _OutIter> && 73753f127fSDimitry Andric (forward_iterator<_InIter> || 74753f127fSDimitry Andric (input_iterator<_OutIter> && same_as<iter_value_t<_InIter>, iter_value_t<_OutIter>>) || 75753f127fSDimitry Andric indirectly_copyable_storable<_InIter, _OutIter>) 7661cfbce3SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr unique_copy_result<_InIter, _OutIter> operator__fn77753f127fSDimitry Andric operator()(_InIter __first, _Sent __last, _OutIter __result, _Comp __comp = {}, _Proj __proj = {}) const { 7861cfbce3SDimitry Andric auto __ret = std::__unique_copy<_RangeAlgPolicy>( 7961cfbce3SDimitry Andric std::move(__first), 8061cfbce3SDimitry Andric std::move(__last), 8161cfbce3SDimitry Andric std::move(__result), 8261cfbce3SDimitry Andric std::__make_projected(__comp, __proj), 8361cfbce3SDimitry Andric __algo_tag_t<_InIter, _OutIter>()); 8461cfbce3SDimitry Andric return {std::move(__ret.first), std::move(__ret.second)}; 85753f127fSDimitry Andric } 86753f127fSDimitry Andric 8761cfbce3SDimitry Andric template <input_range _Range, 8861cfbce3SDimitry Andric weakly_incrementable _OutIter, 8961cfbce3SDimitry Andric class _Proj = identity, 90753f127fSDimitry Andric indirect_equivalence_relation<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::equal_to> 91753f127fSDimitry Andric requires indirectly_copyable<iterator_t<_Range>, _OutIter> && 92753f127fSDimitry Andric (forward_iterator<iterator_t<_Range>> || 93753f127fSDimitry Andric (input_iterator<_OutIter> && same_as<range_value_t<_Range>, iter_value_t<_OutIter>>) || 94753f127fSDimitry Andric indirectly_copyable_storable<iterator_t<_Range>, _OutIter>) 9561cfbce3SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr unique_copy_result<borrowed_iterator_t<_Range>, _OutIter> operator__fn96753f127fSDimitry Andric operator()(_Range&& __range, _OutIter __result, _Comp __comp = {}, _Proj __proj = {}) const { 9761cfbce3SDimitry Andric auto __ret = std::__unique_copy<_RangeAlgPolicy>( 9861cfbce3SDimitry Andric ranges::begin(__range), 9961cfbce3SDimitry Andric ranges::end(__range), 10061cfbce3SDimitry Andric std::move(__result), 10161cfbce3SDimitry Andric std::__make_projected(__comp, __proj), 10261cfbce3SDimitry Andric __algo_tag_t<iterator_t<_Range>, _OutIter>()); 10361cfbce3SDimitry Andric return {std::move(__ret.first), std::move(__ret.second)}; 104753f127fSDimitry Andric } 105753f127fSDimitry Andric }; 106753f127fSDimitry Andric 107753f127fSDimitry Andric } // namespace __unique_copy 108753f127fSDimitry Andric 109753f127fSDimitry Andric inline namespace __cpo { 110753f127fSDimitry Andric inline constexpr auto unique_copy = __unique_copy::__fn{}; 111753f127fSDimitry Andric } // namespace __cpo 112753f127fSDimitry Andric } // namespace ranges 113753f127fSDimitry Andric 114753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD 115753f127fSDimitry Andric 11606c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 117753f127fSDimitry Andric 118*b3edf446SDimitry Andric _LIBCPP_POP_MACROS 119*b3edf446SDimitry Andric 120753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_UNIQUE_COPY_H 121