1 files changed, 38 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__utility/forward.h b/contrib/llvm-project/libcxx/include/__utility/forward.h
new file mode 100644
index 000000000000..010f2362bdce
--- /dev/null
+++ b/contrib/llvm-project/libcxx/include/__utility/forward.h
@@ -0,0 +1,38 @@
+// -*- 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___UTILITY_FORWARD_H
+#define _LIBCPP___UTILITY_FORWARD_H
+
+#include <__config>
+#include <__type_traits/is_reference.h>
+#include <__type_traits/remove_reference.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Tp>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Tp&&
+forward(_LIBCPP_LIFETIMEBOUND __libcpp_remove_reference_t<_Tp>& __t) _NOEXCEPT {
+  return static_cast<_Tp&&>(__t);
+}
+
+template <class _Tp>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR _Tp&&
+forward(_LIBCPP_LIFETIMEBOUND __libcpp_remove_reference_t<_Tp>&& __t) _NOEXCEPT {
+  static_assert(!is_lvalue_reference<_Tp>::value, "cannot forward an rvalue as an lvalue");
+  return static_cast<_Tp&&>(__t);
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___UTILITY_FORWARD_H