libstdc++-v3/testsuite/27_io/basic_filebuf/imbue/wchar_t/3.cc

   1 // 2003-05-13 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2003-2024 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 // 27.8.1.4 Overridden virtual functions
  21
  22 #include <fstream>
  23 #include <locale>
  24 #include <testsuite_hooks.h>
  25
  26 class state_codecvt : public std::codecvt<wchar_t, char, std::mbstate_t>
  27 {
  28 protected:
  29   int
  30   do_encoding() const throw()
  31   { return -1; }
  32 };
  33
  34 void test03()
  35 {
  36   using namespace std;
  37
  38   locale loc_s(locale::classic(), new state_codecvt);
  39   wfilebuf ob;
  40   ob.pubimbue(loc_s);
  41   VERIFY( ob.getloc() == loc_s );
  42
  43   // 2 "if encoding of current locale is state dependent" and
  44   // not at the beginning of the file fails...
  45   locale loc_c = locale::classic();
  46   locale ret = ob.pubimbue(loc_s);
  47   VERIFY( ob.getloc() == loc_s );
  48 }
  49
  50 int main()
  51 {
  52   test03();
  53   return 0;
  54 }