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 _LIBCPP_PUSH_MACROS
  30 #include <__undef_macros>
  31
  32 #if _LIBCPP_STD_VER >= 20
  33
  34 _LIBCPP_BEGIN_NAMESPACE_STD
  35
  36 namespace ranges {
  37
  38 template <class _InIter, class _OutIter>
  39 using remove_copy_result = in_out_result<_InIter, _OutIter>;
  40
  41 struct __remove_copy {
  42   template <input_iterator _InIter,
  43             sentinel_for<_InIter> _Sent,
  44             weakly_incrementable _OutIter,
  45             class _Type,
  46             class _Proj = identity>
  47     requires indirectly_copyable<_InIter, _OutIter> &&
  48              indirect_binary_predicate<ranges::equal_to, projected<_InIter, _Proj>, const _Type*>
  49   _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_result<_InIter, _OutIter>
  50   operator()(_InIter __first, _Sent __last, _OutIter __result, const _Type& __value, _Proj __proj = {}) const {
  51     auto __pred = [&](auto&& __val) -> bool { return __value == __val; };
  52     return ranges::__remove_copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj);
  53   }
  54
  55   template <input_range _Range, weakly_incrementable _OutIter, class _Type, class _Proj = identity>
  56     requires indirectly_copyable<iterator_t<_Range>, _OutIter> &&
  57              indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
  58   _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_result<borrowed_iterator_t<_Range>, _OutIter>
  59   operator()(_Range&& __range, _OutIter __result, const _Type& __value, _Proj __proj = {}) const {
  60     auto __pred = [&](auto&& __val) -> bool { return __value == __val; };
  61     return ranges::__remove_copy_if_impl(
  62         ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __proj);
  63   }
  64 };
  65
  66 inline namespace __cpo {
  67 inline constexpr auto remove_copy = __remove_copy{};
  68 } // namespace __cpo
  69 } // namespace ranges
  70
  71 _LIBCPP_END_NAMESPACE_STD
  72
  73 #endif // _LIBCPP_STD_VER >= 20
  74
  75 _LIBCPP_POP_MACROS
  76
  77 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_H