libstdc++-v3/testsuite/22_locale/codecvt/max_length/wchar_t/4.cc

   1 // { dg-require-namedlocale "" }
   2
   3 // 2003-02-06  Petur Runolfsson  <peturr02@ru.is>
   4
   5 // Copyright (C) 2003, 2005 Free Software Foundation
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 2, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING.  If not, write to the Free
  20 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  21 // USA.
  22
  23 // 22.2.1.5 - Template class codecvt [lib.locale.codecvt]
  24
  25 #include <locale>
  26 #include <testsuite_hooks.h>
  27
  28 // Required instantiation
  29 // codecvt<wchar_t, char, mbstate_t>
  30 void test04()
  31 {
  32   using namespace std;
  33   bool test __attribute__((unused)) = true;
  34   typedef codecvt<wchar_t, char, mbstate_t>     w_codecvt;
  35
  36   locale loc = locale("en_US.UTF-8");
  37   locale::global(loc);
  38   const w_codecvt*      cvt = &use_facet<w_codecvt>(loc);
  39
  40   int k = cvt->max_length();
  41   // Each UCS-4 wide character can be converted to at most 6 narrow
  42   // characters in the UTF-8 encoding.
  43   VERIFY( k == 6 );
  44 }
  45
  46 int main ()
  47 {
  48   test04();
  49   return 0;
  50 }