libstdc++-v3/testsuite/27_io/basic_istream/sentry/pod/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 <ext/pod_char_traits.h>
  35 #include <testsuite_hooks.h>
  36
  37 void test01()
  38 {
  39   using namespace std;
  40   using __gnu_test::pod_type;
  41   typedef basic_string<pod_type>        string_type;
  42   typedef basic_stringbuf<pod_type>     stringbuf_type;
  43   typedef basic_istream<pod_type>       istream_type;
  44
  45   bool test __attribute__((unused)) = true;
  46
  47
  48   const string_type str01;
  49   stringbuf_type strbuf01;
  50   stringbuf_type strbuf02(str01);
  51   istream_type istr01(&strbuf01);
  52   istream_type istr02(&strbuf02);
  53
  54   // test negatives
  55   try
  56     {
  57       istream_type::sentry sentry01(istr01);
  58     }
  59   catch (std::bad_cast& obj)
  60     {
  61       // Ok, throws bad_cast because locale has no ctype facet.
  62     }
  63   catch (...)
  64     {
  65       VERIFY( false );
  66     }
  67
  68   try
  69     {
  70       istream_type::sentry sentry02(istr01, true);
  71     }
  72   catch (std::bad_cast& obj)
  73     {
  74       // Ok, throws bad_cast because locale has no ctype facet.
  75     }
  76   catch (...)
  77     {
  78       VERIFY( false );
  79     }
  80
  81   // imbued.
  82   const std::locale loc(std::locale::classic(), new std::ctype<pod_type>);
  83   istr01.imbue(loc);
  84   try
  85     {
  86       istream_type::sentry sentry01(istr01);
  87       VERIFY( bool(sentry01) == false );
  88     }
  89   catch (...)
  90     {
  91       VERIFY( false );
  92     }
  93
  94   try
  95     {
  96       istream_type::sentry sentry02(istr01, true);
  97       VERIFY( bool(sentry02) == false );
  98     }
  99   catch (...)
 100     {
 101       VERIFY( false );
 102     }
 103
 104   // test positive
 105   try
 106     {
 107       istream_type::sentry sentry03(istr02);
 108     }
 109   catch (std::bad_cast& obj)
 110     {
 111       // Ok, throws bad_cast because locale has no ctype facet.
 112     }
 113   catch (...)
 114     {
 115       VERIFY( false );
 116     }
 117
 118   try
 119     {
 120       istream_type::sentry sentry04(istr02, true);
 121     }
 122   catch (std::bad_cast& obj)
 123     {
 124       // Ok, throws bad_cast because locale has no ctype facet.
 125     }
 126   catch (...)
 127     {
 128       VERIFY( false );
 129     }
 130
 131   // imbued.
 132   istr02.imbue(loc);
 133   try
 134     {
 135       istr02.clear();
 136       istream_type::sentry sentry03(istr02);
 137       // ... as eofbit set.
 138       VERIFY( bool(sentry03) == false );
 139     }
 140   catch (...)
 141     {
 142       VERIFY( false );
 143     }
 144
 145   try
 146     {
 147       istr02.clear();
 148       istream_type::sentry sentry04(istr02, true);
 149       VERIFY( bool(sentry04) == true );
 150     }
 151   catch (...)
 152     {
 153       VERIFY( false );
 154     }
 155 }
 156
 157 #if !__GXX_WEAK__
 158 // Explicitly instantiate for systems with no COMDAT or weak support.
 159 template
 160   std::basic_string<__gnu_test::pod_type>::size_type
 161   std::basic_string<__gnu_test::pod_type>::_Rep::_S_max_size;
 162
 163 template
 164   __gnu_test::pod_type
 165   std::basic_string<__gnu_test::pod_type>::_Rep::_S_terminal;
 166 #endif
 167
 168 int main()
 169 {
 170   test01();
 171   return 0;
 172 }