v1/__algorithm/ranges_remove.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___ALGORITHM_RANGES_REMOVE_H
0010 #define _LIBCPP___ALGORITHM_RANGES_REMOVE_H
0011 #include <__config>
0012
0013 #include <__algorithm/ranges_remove_if.h>
0014 #include <__functional/identity.h>
0015 #include <__functional/ranges_operations.h>
0016 #include <__iterator/concepts.h>
0017 #include <__iterator/permutable.h>
0018 #include <__iterator/projected.h>
0019 #include <__ranges/access.h>
0020 #include <__ranges/concepts.h>
0021 #include <__ranges/subrange.h>
0022 #include <__utility/move.h>
0023
0024 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0025 #  pragma GCC system_header
0026 #endif
0027
0028 _LIBCPP_PUSH_MACROS
0029 #include <__undef_macros>
0030
0031 #if _LIBCPP_STD_VER >= 20
0032
0033 _LIBCPP_BEGIN_NAMESPACE_STD
0034
0035 namespace ranges {
0036 struct __remove {
0037   template <permutable _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity>
0038     requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*>
0039   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>
0040   operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) const {
0041     auto __pred = [&](auto&& __other) -> bool { return __value == __other; };
0042     return ranges::__remove_if_impl(std::move(__first), std::move(__last), __pred, __proj);
0043   }
0044
0045   template <forward_range _Range, class _Type, class _Proj = identity>
0046     requires permutable<iterator_t<_Range>> &&
0047              indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
0048   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>
0049   operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) const {
0050     auto __pred = [&](auto&& __other) -> bool { return __value == __other; };
0051     return ranges::__remove_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj);
0052   }
0053 };
0054
0055 inline namespace __cpo {
0056 inline constexpr auto remove = __remove{};
0057 } // namespace __cpo
0058 } // namespace ranges
0059
0060 _LIBCPP_END_NAMESPACE_STD
0061
0062 #endif // _LIBCPP_STD_VER >= 20
0063
0064 _LIBCPP_POP_MACROS
0065
0066 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_H