X-Authentication-Warning: delorie.com: mailnull set sender to djgpp-bounces using -f
Message-ID: <3C66CA98.70901@vif.com>
From: Sahab Yazdani <sahaby AT vif DOT com>
Organization: PheonixSoft Interactive
User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.7+) Gecko/20020124
X-Accept-Language: en-us
MIME-Version: 1.0
Newsgroups: comp.os.msdos.djgpp
Subject: c++ exceptions
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Cache-Post-Path: www.vif.com!unknown AT ip216-239-69-74 DOT vif DOT net
X-Cache: nntpcache 2.4.0b4 (see http://www.nntpcache.org/)
Lines: 61
NNTP-Posting-Date: Sun, 10 Feb 2002 13:32:01 CST
X-Trace: sv3-s3WL5Enku1o4HUcq86tMRxEvKHxw8hyCgKAHth2dICoJoSR1B79DoylmQwvPLC9GGOf+OjQ2NAIEc6N!cWqfCrxHqYScfFl/b9vRBXuHxxPZSQls3s1FjOPiOJkhoAKQzPH3
X-Complaints-To: abuse AT GigaNews DOT Com
X-DMCA-Notifications: http://www.giganews.com/info/dmca.html
X-Abuse-Info: Please be sure to forward a copy of ALL headers
X-Abuse-Info: Otherwise we will be unable to process your complaint properly
Date: Sun, 10 Feb 2002 19:32:01 GMT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

does GCC3.0.x support C++ exceptions properly??  or is it that I can't 
code them properly??

I have this code (stripped down for newsgroups):
namespace Std {
  class Exception {
  public:
   char *message;
   Exception( char *message = NULL ); // this code works file!
  };
  class foo {
  public:
   foo( char *filename );
  };
}

using namespace Std;

foo::foo( char *filename ) {
  FILE *in;

  in = fopen( filename, "rb" );
  if (in==NULL) throw Exception( "File not found" );
}

//and finally:
int main() {
  foo *bar;

  try {
   bar = new foo( "badfile.txt" ); // purposefully to check
  } catch( Exception e ) {
   printf( e.message ); // this line offends
   return 1;
  }

delete bar;

return 0;
}


NOW by my logic, this primitive program should output:
File not found

but it outputs nothing, yet if I change the line "printf( e.message);" 
to "printf( "Exception Caught: %s\n", e.message );", it outputs:
Exception Caught:
so it is catching the exceptions properly, but the values in the 
exception class is getting messed up.

if somebody wants the complete (relevant) code, then i will e-mail it to 
them, but I think that this should be sufficient to debug the program.
-- 
**************************************************************
* Sahab Yazdani * "Don't worry about what might be... worry  *
* Thornhill S.S * about what is." - Zeddicus Zu'l Zorander   *
**************************************************************
* http://pheonixsoft.virtualave.net/                    * :) *
**************************************************************