libstdc++-v3/testsuite/27_io/basic_streambuf/sputbackc/wchar_t/9538.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.8.1.4 Overridden virtual functions
  21
  22 #include <streambuf>
  23 #include <locale>
  24 #include <cwchar>
  25 #include <testsuite_hooks.h>
  26
  27 class MyTraits : public std::char_traits<wchar_t>
  28 {
  29 public:
  30   static bool eq(wchar_t c1, wchar_t c2)
  31   {
  32     VERIFY( c1 != L'X' );
  33     VERIFY( c2 != L'X' );
  34     return std::char_traits<wchar_t>::eq(c1, c2);
  35   }
  36 };
  37
  38 class MyBuf : public std::basic_streambuf<wchar_t, MyTraits>
  39 {
  40   wchar_t buffer[8];
  41
  42 public:
  43   MyBuf()
  44   {
  45     std::wmemset(buffer, L'X', sizeof(buffer) / sizeof(buffer[0]));
  46     std::wmemset(buffer + 2, L'f', 4);
  47     setg(buffer + 2, buffer + 2, buffer + 6);
  48   }
  49 };
  50
  51 // libstdc++/9538
  52 void test08()
  53 {
  54   MyBuf mb;
  55   mb.sputbackc(L'a');
  56 }
  57
  58 int main()
  59 {
  60   test08();
  61   return 0;
  62 }