libcxx/include/__algorithm/ranges_remove_copy.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_COPY_H
  10 #define _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_H
  11
  12 #include <__algorithm/in_out_result.h>
  13 #include <__algorithm/ranges_remove_copy_if.h>
  14 #include <__config>
  15 #include <__functional/identity.h>
  16 #include <__functional/invoke.h>
  17 #include <__functional/ranges_operations.h>
  18 #include <__iterator/concepts.h>
  19 #include <__iterator/projected.h>
  20 #include <__ranges/access.h>
  21 #include <__ranges/concepts.h>
  22 #include <__ranges/dangling.h>
  23 #include <__utility/move.h>
  24
  25 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  26 #  pragma GCC system_header
  27 #endif
  28
  29 #if _LIBCPP_STD_VER >= 20
  30
  31 _LIBCPP_BEGIN_NAMESPACE_STD
  32
  33 namespace ranges {
  34
  35 template <class _InIter, class _OutIter>
  36 using remove_copy_result = in_out_result<_InIter, _OutIter>;
  37
  38 namespace __remove_copy {
  39
  40 struct __fn {
  41   template <input_iterator _InIter,
  42             sentinel_for<_InIter> _Sent,
  43             weakly_incrementable _OutIter,
  44             class _Type,
  45             class _Proj = identity>
  46     requires indirectly_copyable<_InIter, _OutIter> &&
  47              indirect_binary_predicate<ranges::equal_to, projected<_InIter, _Proj>, const _Type*>
  48   _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_result<_InIter, _OutIter>
  49   operator()(_InIter __first, _Sent __last, _OutIter __result, const _Type& __value, _Proj __proj = {}) const {
  50     auto __pred = [&](auto&& __val) { return __value == __val; };
  51     return ranges::__remove_copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj);
  52   }
  53
  54   template <input_range _Range, weakly_incrementable _OutIter, class _Type, class _Proj = identity>
  55     requires indirectly_copyable<iterator_t<_Range>, _OutIter> &&
  56              indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
  57   _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_result<borrowed_iterator_t<_Range>, _OutIter>
  58   operator()(_Range&& __range, _OutIter __result, const _Type& __value, _Proj __proj = {}) const {
  59     auto __pred = [&](auto&& __val) { return __value == __val; };
  60     return ranges::__remove_copy_if_impl(
  61         ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __proj);
  62   }
  63 };
  64
  65 } // namespace __remove_copy
  66
  67 inline namespace __cpo {
  68 inline constexpr auto remove_copy = __remove_copy::__fn{};
  69 } // namespace __cpo
  70 } // namespace ranges
  71
  72 _LIBCPP_END_NAMESPACE_STD
  73
  74 #endif // _LIBCPP_STD_VER >= 20
  75
  76 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_H