libstdc++-v3/testsuite/27_io/basic_istream/ignore/char/7220.cc

   1 // 1999-08-11 bkoz
   2
   3 // Copyright (C) 1999-2021 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 // 27.6.1.3 unformatted input functions
  21
  22 #include <istream>
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25
  26 // libstdc++/70220
  27 void
  28 test10()
  29 {
  30   using namespace std;
  31   typedef string string_type;
  32   typedef stringbuf stringbuf_type;
  33   typedef istream istream_type;
  34
  35   streamsize n;
  36   string_type  input("abcdefg\n");
  37   stringbuf_type sbuf(input);
  38   istream_type  istr(&sbuf);
  39
  40   istr.ignore(0);
  41   if (istr.gcount() != 0)
  42     VERIFY( false );
  43
  44   istr.ignore(0, 'b');
  45   if (istr.gcount() != 0)
  46     VERIFY( false );
  47
  48   istr.ignore();        // Advance to next position.
  49   istr.ignore(0, 'b');
  50   if ((n=istr.gcount()) != 0)
  51     VERIFY( false );
  52
  53   if (istr.peek() != 'b')
  54     VERIFY( false );
  55 }
  56
  57 int
  58 main()
  59 {
  60   test10();
  61   return 0;
  62 }