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

   1 // Copyright (C) 2007-2014 Free Software Foundation, Inc.
   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 3, 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 COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 #include <string>
  19 #include <locale>
  20 #include <testsuite_hooks.h>
  21
  22 // Based on Langer Kreft "Standard C++ IOStreams and Locales" p 316-318
  23 // PR libstdc++/30127
  24 // PR libstdc++/34449
  25 int main()
  26 {
  27   bool test __attribute__((unused)) = true;
  28
  29   using std::locale;
  30   using std::has_facet;
  31   using std::use_facet;
  32   typedef std::ctype<char> base_facet;
  33   typedef std::ctype_byname<char> derived_facet;
  34
  35   locale loc_c = locale::classic();
  36   locale loc_base = loc_c;
  37   locale loc_derived(loc_c, new derived_facet("C"));
  38
  39   // Standard base facet.
  40   VERIFY( has_facet<base_facet>(loc_c) );
  41   VERIFY( has_facet<base_facet>(loc_base) );
  42   VERIFY( has_facet<base_facet>(loc_derived) );
  43
  44   // Standard derived facet.
  45   VERIFY( !has_facet<derived_facet>(loc_c) );
  46   VERIFY( !has_facet<derived_facet>(loc_base) );
  47   VERIFY( has_facet<derived_facet>(loc_derived) );
  48
  49
  50   // 1
  51   try
  52     {
  53       if (has_facet<derived_facet>(loc_base))
  54         {
  55           use_facet<derived_facet>(loc_base).widen('k');
  56           VERIFY( true );
  57         }
  58     }
  59   catch (...)
  60     {
  61       // Expect no exception.
  62       VERIFY( true );
  63     }
  64
  65   // 2
  66   try
  67     {
  68       if (has_facet<base_facet>(loc_derived))
  69         use_facet<base_facet>(loc_derived).widen('k');
  70       else
  71         VERIFY( true );
  72     }
  73   catch (...)
  74     {
  75       // Expect no exception.
  76       VERIFY( true );
  77     }
  78
  79   return 0;
  80 }