libstdc++-v3/testsuite/27_io/basic_stringbuf/pbackfail/char/1.cc

   1 // 2004-10-01  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2004 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 27.7.1.3  Overridden virtual functions  [lib.stringbuf.virtuals]
  22
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25
  26 class my_stringbuf : public std::stringbuf
  27 {
  28 public:
  29   my_stringbuf(const std::string& str, std::ios_base::openmode mode)
  30   : std::stringbuf(str, mode) { }
  31
  32   int_type
  33   pub_pbackfail(int_type c)
  34   { return this->pbackfail(c); }
  35 };
  36
  37 void test01()
  38 {
  39   bool test __attribute__((unused)) = true;
  40   using namespace std;
  41
  42   typedef my_stringbuf::int_type    int_type;
  43   typedef my_stringbuf::traits_type traits_type;
  44
  45   my_stringbuf sbuf("any", ios_base::in | ios_base::out);
  46
  47   int_type c = sbuf.sgetc();
  48   VERIFY( c == 'a' );
  49
  50   c = sbuf.pub_pbackfail('z');
  51   VERIFY( c == traits_type::eof() );
  52   c = sbuf.sbumpc();
  53   VERIFY( c == 'a' );
  54
  55   c = sbuf.pub_pbackfail('a');
  56   VERIFY( c == 'a' );
  57   c = sbuf.sbumpc();
  58   VERIFY( c == 'a' );
  59
  60   c = sbuf.pub_pbackfail('x');
  61   VERIFY( c == 'x' );
  62   c = sbuf.sbumpc();
  63   VERIFY( c == 'x' );
  64
  65   const int_type eof = traits_type::eof();
  66   c = sbuf.pub_pbackfail(eof);
  67   VERIFY( c == traits_type::not_eof(eof) );
  68   c = sbuf.sgetc();
  69   VERIFY( c == 'x' );
  70 }
  71
  72 int main()
  73 {
  74   test01();
  75   return 0;
  76 }