explicit
basic_stringstream(__string_type&& __str,
- ios_base::openmode __mode = ios_base::out
+ ios_base::openmode __mode = ios_base::in
| ios_base::out)
: __iostream_type(), _M_stringbuf(std::move(__str), __mode)
{ this->init(std::__addressof(_M_stringbuf)); }
--- /dev/null
+// Copyright (C) 2020 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++2a" }
+// { dg-do run { target c++2a } }
+
+#include <sstream>
+#include <iterator>
+#include <testsuite_hooks.h>
+
+void
+test01()
+{
+ // PR libstdc++/97719
+ std::string str = "a";
+ std::stringstream s(std::move(str));
+ std::istreambuf_iterator<char> i(s);
+ VERIFY( i != std::istreambuf_iterator<char>() );
+ VERIFY( *i == 'a' );
+}
+
+int
+main()
+{
+ test01();
+}