__cxx03/__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___CXX03___ALGORITHM_RANGES_REMOVE_H
0010 #define _LIBCPP___CXX03___ALGORITHM_RANGES_REMOVE_H
0011 #include <__cxx03/__config>
0012
0013 #include <__cxx03/__algorithm/ranges_remove_if.h>
0014 #include <__cxx03/__functional/identity.h>
0015 #include <__cxx03/__functional/ranges_operations.h>
0016 #include <__cxx03/__iterator/concepts.h>
0017 #include <__cxx03/__iterator/permutable.h>
0018 #include <__cxx03/__iterator/projected.h>
0019 #include <__cxx03/__ranges/access.h>
0020 #include <__cxx03/__ranges/concepts.h>
0021 #include <__cxx03/__ranges/subrange.h>
0022 #include <__cxx03/__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 <__cxx03/__undef_macros>
0030
0031 #if _LIBCPP_STD_VER >= 20
0032
0033 _LIBCPP_BEGIN_NAMESPACE_STD
0034
0035 namespace ranges {
0036 namespace __remove {
0037 struct __fn {
0038   template <permutable _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity>
0039     requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*>
0040   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>
0041   operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) const {
0042     auto __pred = [&](auto&& __other) -> bool { return __value == __other; };
0043     return ranges::__remove_if_impl(std::move(__first), std::move(__last), __pred, __proj);
0044   }
0045
0046   template <forward_range _Range, class _Type, class _Proj = identity>
0047     requires permutable<iterator_t<_Range>> &&
0048              indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
0049   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>
0050   operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) const {
0051     auto __pred = [&](auto&& __other) -> bool { return __value == __other; };
0052     return ranges::__remove_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj);
0053   }
0054 };
0055 } // namespace __remove
0056
0057 inline namespace __cpo {
0058 inline constexpr auto remove = __remove::__fn{};
0059 } // namespace __cpo
0060 } // namespace ranges
0061
0062 _LIBCPP_END_NAMESPACE_STD
0063
0064 #endif // _LIBCPP_STD_VER >= 20
0065
0066 _LIBCPP_POP_MACROS
0067
0068 #endif // _LIBCPP___CXX03___ALGORITHM_RANGES_REMOVE_H