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

   1 // 1999-10-14 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
  21 // 27.6.1.1.2 class basic_istream::sentry
  22
  23 #include <istream>
  24 #include <sstream>
  25 #include <typeinfo>
  26 #include <ext/pod_char_traits.h>
  27 #include <testsuite_hooks.h>
  28 #include <testsuite_character.h>
  29
  30 void test01()
  31 {
  32   using namespace std;
  33   using __gnu_test::pod_ushort;
  34   typedef basic_string<pod_ushort>      string_type;
  35   typedef basic_stringbuf<pod_ushort>   stringbuf_type;
  36   typedef basic_istream<pod_ushort>     istream_type;
  37
  38   const string_type str01;
  39   stringbuf_type strbuf01;
  40   stringbuf_type strbuf02(str01);
  41   istream_type istr01(&strbuf01);
  42   istream_type istr02(&strbuf02);
  43
  44   // test negatives
  45   try
  46     {
  47       istream_type::sentry sentry01(istr01);
  48     }
  49   catch (std::bad_cast& obj)
  50     {
  51       // Ok, throws bad_cast because locale has no ctype facet.
  52     }
  53   catch (...)
  54     {
  55       VERIFY( false );
  56     }
  57
  58   try
  59     {
  60       istream_type::sentry sentry02(istr01, true);
  61     }
  62   catch (std::bad_cast& obj)
  63     {
  64       // Ok, throws bad_cast because locale has no ctype facet.
  65     }
  66   catch (...)
  67     {
  68       VERIFY( false );
  69     }
  70
  71   // imbued.
  72   const std::locale loc(std::locale::classic(), new std::ctype<pod_ushort>);
  73   istr01.imbue(loc);
  74   try
  75     {
  76       istream_type::sentry sentry01(istr01);
  77       VERIFY( bool(sentry01) == false );
  78     }
  79   catch (...)
  80     {
  81       VERIFY( false );
  82     }
  83
  84   try
  85     {
  86       istream_type::sentry sentry02(istr01, true);
  87       VERIFY( bool(sentry02) == false );
  88     }
  89   catch (...)
  90     {
  91       VERIFY( false );
  92     }
  93
  94   // test positive
  95   try
  96     {
  97       istream_type::sentry sentry03(istr02);
  98     }
  99   catch (std::bad_cast& obj)
 100     {
 101       // Ok, throws bad_cast because locale has no ctype facet.
 102     }
 103   catch (...)
 104     {
 105       VERIFY( false );
 106     }
 107
 108   try
 109     {
 110       istream_type::sentry sentry04(istr02, true);
 111     }
 112   catch (std::bad_cast& obj)
 113     {
 114       // Ok, throws bad_cast because locale has no ctype facet.
 115     }
 116   catch (...)
 117     {
 118       VERIFY( false );
 119     }
 120
 121   // imbued.
 122   istr02.imbue(loc);
 123   try
 124     {
 125       istr02.clear();
 126       istream_type::sentry sentry03(istr02);
 127       // ... as eofbit set.
 128       VERIFY( bool(sentry03) == false );
 129     }
 130   catch (...)
 131     {
 132       VERIFY( false );
 133     }
 134
 135   try
 136     {
 137       istr02.clear();
 138       istream_type::sentry sentry04(istr02, true);
 139       VERIFY( bool(sentry04) == true );
 140     }
 141   catch (...)
 142     {
 143       VERIFY( false );
 144     }
 145 }
 146
 147 #if !__GXX_WEAK__
 148 // Explicitly instantiate for systems with no COMDAT or weak support.
 149 template
 150   const std::basic_string<__gnu_test::pod_ushort>::size_type
 151   std::basic_string<__gnu_test::pod_ushort>::_Rep::_S_max_size;
 152
 153 template
 154   const __gnu_test::pod_ushort
 155   std::basic_string<__gnu_test::pod_ushort>::_Rep::_S_terminal;
 156 #endif
 157
 158 int main()
 159 {
 160   test01();
 161   return 0;
 162 }