--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libcxx/include/__algorithm/ranges_remove_copy.h	Wed Nov 09 17:45:10 2022 +0900
@@ -0,0 +1,76 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_H
+#define _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_H
+
+#include <__algorithm/in_out_result.h>
+#include <__algorithm/ranges_remove_copy_if.h>
+#include <__config>
+#include <__functional/identity.h>
+#include <__functional/invoke.h>
+#include <__functional/ranges_operations.h>
+#include <__iterator/concepts.h>
+#include <__iterator/projected.h>
+#include <__ranges/access.h>
+#include <__ranges/concepts.h>
+#include <__ranges/dangling.h>
+#include <__utility/move.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+#if _LIBCPP_STD_VER > 17
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace ranges {
+
+template <class _InIter, class _OutIter>
+using remove_copy_result = in_out_result<_InIter, _OutIter>;
+
+namespace __remove_copy {
+
+  struct __fn {
+    template <input_iterator _InIter,
+              sentinel_for<_InIter> _Sent,
+              weakly_incrementable _OutIter,
+              class _Type,
+              class _Proj = identity>
+      requires indirectly_copyable<_InIter, _OutIter> &&
+               indirect_binary_predicate<ranges::equal_to, projected<_InIter, _Proj>, const _Type*>
+    _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_result<_InIter, _OutIter>
+    operator()(_InIter __first, _Sent __last, _OutIter __result, const _Type& __value, _Proj __proj = {}) const {
+      auto __pred = [&](auto&& __val) { return __value == __val; };
+      return ranges::__remove_copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj);
+    }
+
+    template <input_range _Range, weakly_incrementable _OutIter, class _Type, class _Proj = identity>
+      requires indirectly_copyable<iterator_t<_Range>, _OutIter> &&
+               indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
+    _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_result<borrowed_iterator_t<_Range>, _OutIter>
+    operator()(_Range&& __range, _OutIter __result, const _Type& __value, _Proj __proj = {}) const {
+      auto __pred = [&](auto&& __val) { return __value == __val; };
+      return ranges::__remove_copy_if_impl(
+          ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __proj);
+    }
+  };
+
+} // namespace __remove_copy
+
+inline namespace __cpo {
+  inline constexpr auto remove_copy = __remove_copy::__fn{};
+} // namespace __cpo
+} // namespace ranges
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP_STD_VER > 17
+
+#endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_H