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From:	Sahab Yazdani <sahaby AT vif DOT com>
Organization:	PheonixSoft Interactive
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Newsgroups:	comp.os.msdos.djgpp
Subject:	c++ exceptions
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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/                    * :) *
**************************************************************

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