libstdc++-v3/testsuite/27_io/basic_istream/extractors_character/wchar_t/9555-ic.cc

   1 // Copyright (C) 2004-2022 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
  19 #include <istream>
  20 #include <streambuf>
  21 #include <testsuite_hooks.h>
  22
  23 struct buf: std::wstreambuf
  24 {
  25   virtual int_type overflow(int_type)
  26   { throw 0; }
  27 };
  28
  29 template<typename T>
  30 void testthrow(T arg)
  31 {
  32   buf b;
  33   std::wistream is(&b);
  34   is.exceptions(std::wios::badbit);
  35
  36   try
  37     {
  38       is >> arg;
  39     }
  40   catch(int)
  41     {
  42       // Expected return is zero.
  43       VERIFY( is.bad() );
  44     }
  45   catch(...)
  46     {
  47       VERIFY( false );
  48     }
  49 }
  50
  51 int main()
  52 {
  53   wchar_t c = L'a';
  54   wchar_t* cp = &c;
  55
  56   testthrow(c);
  57 #if __cplusplus <= 201703L
  58   testthrow(cp);
  59 #endif
  60
  61   return 0;
  62 }