+// { dg-options "-std=gnu++2a" }
+// { dg-do compile { target c++2a } }
+//
+// Copyright (C) 2019 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 copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <string_view>
+#include <array>
+
+constexpr char
+test()
+{
+ constexpr std::string_view hw("Hello, World!");
+ static_assert('H' == *hw.begin());
+ auto ch = hw[4];
+ static_assert('W' == *(hw.cbegin() + 7));
+
+ std::array<int, hw.size()> a2{{0,0,0,0,0,0,0,0,0,0,0,0,0}};
+ std::copy(hw.begin(), hw.end(), a2.begin());
+
+ return *(hw.cbegin() + 3);
+}
+
+void
+run_test()
+{
+ constexpr char ch = test();
+}