libstdc++-v3/testsuite/27_io/basic_istream/sentry/char/1.cc

   1 // 1999-10-14 bkoz
   2
   3 // Copyright (C) 1999, 2001, 2003 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 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // 27.6.1.1.2 class basic_istream::sentry
  31
  32 #include <istream>
  33 #include <sstream>
  34 #include <testsuite_hooks.h>
  35
  36 void test01()
  37 {
  38   bool test __attribute__((unused)) = true;
  39   const char* lit01 = "stereolab on the bolsinga tip";
  40   const std::string str01(lit01);
  41
  42   std::stringbuf strbuf01;
  43   std::stringbuf strbuf02(str01);
  44   std::istream istr01(&strbuf01);
  45   std::istream istr02(&strbuf02);
  46
  47   // test negatives
  48   std::istream::sentry sentry01(istr01);
  49   VERIFY( bool(sentry01) == false );
  50
  51   std::istream::sentry sentry02(istr01, true);
  52   VERIFY( bool(sentry02) == false );
  53
  54   // positive tests
  55   std::istream::sentry sentry03(istr02);
  56   VERIFY( bool(sentry03) == true );
  57
  58   std::istream::sentry sentry04(istr02, true);
  59   VERIFY( bool(sentry04) == true );
  60 }
  61
  62 int main()
  63 {
  64   test01();
  65   return 0;
  66 }