1 files changed, 35 insertions, 0 deletions
diff --git a/libstdc++-v3/testsuite/20_util/optional/observers/4.cc b/libstdc++-v3/testsuite/20_util/optional/observers/4.cc
new file mode 100644
index 00000000000..9a305674fb0
--- /dev/null
+++ b/libstdc++-v3/testsuite/20_util/optional/observers/4.cc
@@ -0,0 +1,35 @@
+// { dg-options "-std=gnu++17" }
+// { dg-do run }
+
+// Copyright (C) 2013-2016 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a moved_to of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <optional>
+#include <testsuite_hooks.h>
+
+struct value_type
+{
+  int i;
+};
+
+int main()
+{
+  std::optional<value_type> o { value_type { 51 } };
+  value_type fallback { 3 };
+  VERIFY( o.value_or(fallback).i == 51 );
+  VERIFY( o.value_or(fallback).i == (*o).i );
+}