libstdc++-v3/testsuite/22_locale/global_templates/standard_facet_hierarchies.cc

   1 // Copyright (C) 2007, 2008 Free Software Foundation
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 #include <string>
  20 #include <locale>
  21 #include <testsuite_hooks.h>
  22
  23 // Based on Langer Kreft "Standard C++ IOStreams and Locales" p 316-318
  24 // PR libstdc++/30127
  25 // PR libstdc++/34449
  26 int main()
  27 {
  28   bool test __attribute__((unused)) = true;
  29
  30   using std::locale;
  31   using std::has_facet;
  32   using std::use_facet;
  33   typedef std::ctype<char> base_facet;
  34   typedef std::ctype_byname<char> derived_facet;
  35
  36   locale loc_c = locale::classic();
  37   locale loc_base = loc_c;
  38   locale loc_derived(loc_c, new derived_facet("C"));
  39
  40   // Standard base facet.
  41   VERIFY( has_facet<base_facet>(loc_c) );
  42   VERIFY( has_facet<base_facet>(loc_base) );
  43   VERIFY( has_facet<base_facet>(loc_derived) );
  44
  45   // Standard derived facet.
  46   VERIFY( !has_facet<derived_facet>(loc_c) );
  47   VERIFY( !has_facet<derived_facet>(loc_base) );
  48   VERIFY( has_facet<derived_facet>(loc_derived) );
  49
  50
  51   // 1
  52   try
  53     {
  54       if (has_facet<derived_facet>(loc_base))
  55         {
  56           use_facet<derived_facet>(loc_base).widen('k');
  57           VERIFY( true );
  58         }
  59     }
  60   catch (...)
  61     {
  62       // Expect no exception.
  63       VERIFY( true );
  64     }
  65
  66   // 2
  67   try
  68     {
  69       if (has_facet<base_facet>(loc_derived))
  70         use_facet<base_facet>(loc_derived).widen('k');
  71       else
  72         VERIFY( true );
  73     }
  74   catch (...)
  75     {
  76       // Expect no exception.
  77       VERIFY( true );
  78     }
  79
  80   return 0;
  81 }