__cxx03/__algorithm/ranges_remove_copy.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___CXX03___ALGORITHM_RANGES_REMOVE_COPY_H
0010 #define _LIBCPP___CXX03___ALGORITHM_RANGES_REMOVE_COPY_H
0011
0012 #include <__cxx03/__algorithm/in_out_result.h>
0013 #include <__cxx03/__algorithm/ranges_remove_copy_if.h>
0014 #include <__cxx03/__config>
0015 #include <__cxx03/__functional/identity.h>
0016 #include <__cxx03/__functional/invoke.h>
0017 #include <__cxx03/__functional/ranges_operations.h>
0018 #include <__cxx03/__iterator/concepts.h>
0019 #include <__cxx03/__iterator/projected.h>
0020 #include <__cxx03/__ranges/access.h>
0021 #include <__cxx03/__ranges/concepts.h>
0022 #include <__cxx03/__ranges/dangling.h>
0023 #include <__cxx03/__utility/move.h>
0024
0025 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0026 #  pragma GCC system_header
0027 #endif
0028
0029 _LIBCPP_PUSH_MACROS
0030 #include <__cxx03/__undef_macros>
0031
0032 #if _LIBCPP_STD_VER >= 20
0033
0034 _LIBCPP_BEGIN_NAMESPACE_STD
0035
0036 namespace ranges {
0037
0038 template <class _InIter, class _OutIter>
0039 using remove_copy_result = in_out_result<_InIter, _OutIter>;
0040
0041 namespace __remove_copy {
0042
0043 struct __fn {
0044   template <input_iterator _InIter,
0045             sentinel_for<_InIter> _Sent,
0046             weakly_incrementable _OutIter,
0047             class _Type,
0048             class _Proj = identity>
0049     requires indirectly_copyable<_InIter, _OutIter> &&
0050              indirect_binary_predicate<ranges::equal_to, projected<_InIter, _Proj>, const _Type*>
0051   _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_result<_InIter, _OutIter>
0052   operator()(_InIter __first, _Sent __last, _OutIter __result, const _Type& __value, _Proj __proj = {}) const {
0053     auto __pred = [&](auto&& __val) -> bool { return __value == __val; };
0054     return ranges::__remove_copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj);
0055   }
0056
0057   template <input_range _Range, weakly_incrementable _OutIter, class _Type, class _Proj = identity>
0058     requires indirectly_copyable<iterator_t<_Range>, _OutIter> &&
0059              indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
0060   _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_result<borrowed_iterator_t<_Range>, _OutIter>
0061   operator()(_Range&& __range, _OutIter __result, const _Type& __value, _Proj __proj = {}) const {
0062     auto __pred = [&](auto&& __val) -> bool { return __value == __val; };
0063     return ranges::__remove_copy_if_impl(
0064         ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __proj);
0065   }
0066 };
0067
0068 } // namespace __remove_copy
0069
0070 inline namespace __cpo {
0071 inline constexpr auto remove_copy = __remove_copy::__fn{};
0072 } // namespace __cpo
0073 } // namespace ranges
0074
0075 _LIBCPP_END_NAMESPACE_STD
0076
0077 #endif // _LIBCPP_STD_VER >= 20
0078
0079 _LIBCPP_POP_MACROS
0080
0081 #endif // _LIBCPP___CXX03___ALGORITHM_RANGES_REMOVE_COPY_H