libstdc++-v3/testsuite/22_locale/global_templates/1.cc

   1 // 2000-09-11 Benjamin Kosnik <bkoz@redhat.com>
   2
   3 // Copyright (C) 2000-2025 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 // 22.1.2 locale globals [lib.locale.global.templates]
  21
  22 #include <cwchar> // for mbstate_t
  23 #include <locale>
  24 #include <typeinfo>
  25 #include <testsuite_hooks.h>
  26
  27 typedef std::codecvt<char, char, std::mbstate_t> ccodecvt;
  28
  29 class gnu_codecvt: public ccodecvt { };
  30
  31 void test01()
  32 {
  33   using namespace std;
  34
  35   // construct a locale object with the C facet
  36   const locale&         cloc = locale::classic();
  37   // sanity check the constructed locale has the normal facet
  38   VERIFY( has_facet<ccodecvt>(cloc) );
  39
  40   // construct a locale object with the specialized facet.
  41   locale                loc(locale::classic(), new gnu_codecvt);
  42   // sanity check the constructed locale has the specialized facet.
  43   VERIFY( has_facet<gnu_codecvt>(loc) );
  44
  45   try
  46     { const ccodecvt& cvt01 __attribute__((unused)) = use_facet<ccodecvt>(cloc); }
  47   catch(...)
  48     { VERIFY( false ); }
  49
  50   try
  51     { const gnu_codecvt& cvt02 __attribute__((unused)) = use_facet<gnu_codecvt>(loc); }
  52   catch(...)
  53     { VERIFY( false ); }
  54
  55   try
  56     { const ccodecvt& cvt03 __attribute__((unused)) = use_facet<gnu_codecvt>(cloc); }
  57   catch(bad_cast& obj)
  58     { VERIFY( true ); }
  59   catch(...)
  60     { VERIFY( false ); }
  61 }
  62
  63 int main ()
  64 {
  65   test01();
  66
  67   return 0;
  68 }