1 files changed, 44 insertions, 0 deletions
diff --git a/libcxx/include/__tuple_dir/tuple_like_ext.h b/libcxx/include/__tuple_dir/tuple_like_ext.h
new file mode 100644
index 000000000000..bf9869611273
--- /dev/null
+++ b/libcxx/include/__tuple_dir/tuple_like_ext.h
@@ -0,0 +1,44 @@
+//===----------------------------------------------------------------------===//
+//
+// 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___TUPLE_TUPLE_LIKE_EXT_H
+#define _LIBCPP___TUPLE_TUPLE_LIKE_EXT_H
+
+#include <__config>
+#include <__fwd/array.h>
+#include <__fwd/pair.h>
+#include <__fwd/tuple.h>
+#include <__tuple_dir/tuple_types.h>
+#include <__type_traits/integral_constant.h>
+#include <cstddef>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+template <class _Tp> struct __tuple_like_ext : false_type {};
+
+template <class _Tp> struct __tuple_like_ext<const _Tp> : public __tuple_like_ext<_Tp> {};
+template <class _Tp> struct __tuple_like_ext<volatile _Tp> : public __tuple_like_ext<_Tp> {};
+template <class _Tp> struct __tuple_like_ext<const volatile _Tp> : public __tuple_like_ext<_Tp> {};
+
+#ifndef _LIBCPP_CXX03_LANG
+template <class... _Tp> struct __tuple_like_ext<tuple<_Tp...> > : true_type {};
+#endif
+
+template <class _T1, class _T2> struct __tuple_like_ext<pair<_T1, _T2> > : true_type {};
+
+template <class _Tp, size_t _Size> struct __tuple_like_ext<array<_Tp, _Size> > : true_type {};
+
+template <class... _Tp> struct __tuple_like_ext<__tuple_types<_Tp...> > : true_type {};
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___TUPLE_TUPLE_LIKE_EXT_H