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

   1 // 2004-10-01  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2004-2013 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 // 27.7.1.3  Overridden virtual functions  [lib.stringbuf.virtuals]
  21
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 class my_stringbuf : public std::stringbuf
  26 {
  27 public:
  28   my_stringbuf(const std::string& str, std::ios_base::openmode mode)
  29   : std::stringbuf(str, mode) { }
  30
  31   int_type
  32   pub_pbackfail(int_type c)
  33   { return this->pbackfail(c); }
  34 };
  35
  36 void test01()
  37 {
  38   bool test __attribute__((unused)) = true;
  39   using namespace std;
  40
  41   typedef my_stringbuf::int_type    int_type;
  42   typedef my_stringbuf::traits_type traits_type;
  43
  44   my_stringbuf sbuf("any", ios_base::in | ios_base::out);
  45
  46   int_type c = sbuf.sgetc();
  47   VERIFY( c == 'a' );
  48
  49   c = sbuf.pub_pbackfail('z');
  50   VERIFY( c == traits_type::eof() );
  51   c = sbuf.sbumpc();
  52   VERIFY( c == 'a' );
  53
  54   c = sbuf.pub_pbackfail('a');
  55   VERIFY( c == 'a' );
  56   c = sbuf.sbumpc();
  57   VERIFY( c == 'a' );
  58
  59   c = sbuf.pub_pbackfail('x');
  60   VERIFY( c == 'x' );
  61   c = sbuf.sbumpc();
  62   VERIFY( c == 'x' );
  63
  64   const int_type eof = traits_type::eof();
  65   c = sbuf.pub_pbackfail(eof);
  66   VERIFY( c == traits_type::not_eof(eof) );
  67   c = sbuf.sgetc();
  68   VERIFY( c == 'x' );
  69 }
  70
  71 int main()
  72 {
  73   test01();
  74   return 0;
  75 }