Subj : Re: How do I raise an exception?
To   : netscape.public.mozilla.jseng
From : Thomas Sondergaard
Date : Wed Aug 03 2005 12:40 pm

Brendan Eich wrote:

> No, you can use JS_ReportError to throw errors as exceptions, but they 
> won't be localizable.  The bug you may be referring to involves the 
> hardwired error numbers enumerated with other data by js.msg, and how an 
> embedding can't use JS_ReportErrorNumber or related APIs with its own 
> catalog of messages.

I don't get an exception. I've traced through the code with gdb and I 
can see the js_ErrorToException returns JS_FALSE because errorNumber = 
JSMSG_NOT_AN_ERROR and then exn = JSEXN_NONE.

What am I doing wrong?


=== From jsexn.c line 909 (js-1.5-rc6a.tar.gz):

     errorNumber = (JSErrNum) reportp->errorNumber;
     exn = errorToExceptionNum[errorNumber];
     JS_ASSERT(exn < JSEXN_LIMIT);

#if defined( DEBUG_mccabe ) && defined ( PRINTNAMES )
     /* Print the error name and the associated exception name to stderr */
     fprintf(stderr, "%s\t%s\n",
             errortoexnname[errorNumber].name,
             errortoexnname[errorNumber].exception);
#endif

     /*
      * Return false (no exception raised) if no exception is associated
      * with the given error number.
      */
     if (exn == JSEXN_NONE)
         return JS_FALSE;

.