1 files changed, 49 insertions, 0 deletions
diff --git a/libcxx/include/__algorithm/in_found_result.h b/libcxx/include/__algorithm/in_found_result.h
new file mode 100644
index 000000000000..d43f45cd80ef
--- /dev/null
+++ b/libcxx/include/__algorithm/in_found_result.h
@@ -0,0 +1,49 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// 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_IN_FOUND_RESULT_H
+#define _LIBCPP___ALGORITHM_IN_FOUND_RESULT_H
+
+#include <__concepts/convertible_to.h>
+#include <__config>
+#include <__utility/move.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace ranges {
+template <class _InIter1>
+struct in_found_result {
+  _LIBCPP_NO_UNIQUE_ADDRESS _InIter1 in;
+  bool found;
+
+  template <class _InIter2>
+    requires convertible_to<const _InIter1&, _InIter2>
+  _LIBCPP_HIDE_FROM_ABI constexpr operator in_found_result<_InIter2>() const & {
+    return {in, found};
+  }
+
+  template <class _InIter2>
+    requires convertible_to<_InIter1, _InIter2>
+  _LIBCPP_HIDE_FROM_ABI constexpr operator in_found_result<_InIter2>() && {
+    return {std::move(in), found};
+  }
+};
+} // namespace ranges
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+
+#endif // _LIBCPP___ALGORITHM_IN_FOUND_RESULT_H