libstdc++-v3/testsuite/27_io/basic_stringbuf/cons/81381.cc

   1 // Copyright (C) 2017-2024 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 {
  31   SB(const String& s) : basic_stringbuf(s) { }
  32
  33   using basic_stringbuf::overflow;
  34 };
  35
  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 }