1 // Copyright (C) 2017-2018 Free Software Foundation, Inc.
2 //
3 // This file is part of the GNU ISO C++ Library.  This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
7 // any later version.
8 
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 // GNU General Public License for more details.
13 
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3.  If not see
16 // <http://www.gnu.org/licenses/>.
17 
18 // { dg-do run { target c++11 } }
19 
20 // PR libstdc++/81381
21 
22 #include <memory>
23 #include <sstream>
24 #include <testsuite_allocator.h>
25 
26 using Alloc = __gnu_test::uneq_allocator<char>;
27 using String = std::basic_string<char, std::char_traits<char>, Alloc>;
28 
29 struct SB : std::basic_stringbuf<char, std::char_traits<char>, Alloc>
30 {
SBSB31   SB(const String& s) : basic_stringbuf(s) { }
32 
33   using basic_stringbuf::overflow;
34 };
35 
main()36 int main()
37 {
38   String s(Alloc(23));
39   SB b(s);
40   b.overflow('a');
41   VERIFY( b.str().get_allocator() == s.get_allocator() );
42 }
43