libcxx/include/__algorithm/ranges_remove.h

   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_REMOVE_H
  10 #define _LIBCPP___ALGORITHM_RANGES_REMOVE_H
  11 #include <__config>
  12
  13 #include <__algorithm/ranges_remove_if.h>
  14 #include <__functional/identity.h>
  15 #include <__functional/ranges_operations.h>
  16 #include <__iterator/concepts.h>
  17 #include <__iterator/permutable.h>
  18 #include <__iterator/projected.h>
  19 #include <__ranges/access.h>
  20 #include <__ranges/concepts.h>
  21 #include <__ranges/subrange.h>
  22 #include <__utility/move.h>
  23
  24 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  25 #  pragma GCC system_header
  26 #endif
  27
  28 #if _LIBCPP_STD_VER >= 20
  29
  30 _LIBCPP_BEGIN_NAMESPACE_STD
  31
  32 namespace ranges {
  33 namespace __remove {
  34 struct __fn {
  35   template <permutable _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity>
  36     requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*>
  37   _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>
  38   operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) const {
  39     auto __pred = [&](auto&& __other) { return __value == __other; };
  40     return ranges::__remove_if_impl(std::move(__first), std::move(__last), __pred, __proj);
  41   }
  42
  43   template <forward_range _Range, class _Type, class _Proj = identity>
  44     requires permutable<iterator_t<_Range>> &&
  45              indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
  46   _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>
  47   operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) const {
  48     auto __pred = [&](auto&& __other) { return __value == __other; };
  49     return ranges::__remove_if_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj);
  50   }
  51 };
  52 } // namespace __remove
  53
  54 inline namespace __cpo {
  55 inline constexpr auto remove = __remove::__fn{};
  56 } // namespace __cpo
  57 } // namespace ranges
  58
  59 _LIBCPP_END_NAMESPACE_STD
  60
  61 #endif // _LIBCPP_STD_VER >= 20
  62
  63 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_H