Copy string_view tests from libstdc++

[thirdparty/binutils-gdb.git] / gdb / unittests / basic_string_view / modifiers / swap / wchar_t / 1.cc

diff --git a/gdb/unittests/basic_string_view/modifiers/swap/wchar_t/1.cc b/gdb/unittests/basic_string_view/modifiers/swap/wchar_t/1.cc
new file mode 100644 (file)
index 0000000..bd757ec
--- /dev/null
+++ b/gdb/unittests/basic_string_view/modifiers/swap/wchar_t/1.cc
@@ -0,0 +1,35 @@
+// Copyright (C) 2017-2018 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/>.
+
+// { dg-options "-std=gnu++17" }
+// { dg-do compile { target c++17 } }
+
+#include <string_view>
+
+constexpr bool
+test01()
+{
+  using std::wstring_view;
+
+  wstring_view s1{L"last"};
+  wstring_view s2{L"first"};
+
+  s1.swap(s2);
+  return s1 == L"first" && s2 == L"last";
+}
+
+static_assert( test01() );