[antlr-interest] exceptions in the lexer

[Harald Mueller]

> 
> Hey, Just extend you user-defined exceptions from RuntimeException and
> throw
> them.

He explicitly didn't want to do this - but I also do it (using a
WrappingRuntimeException which I need at other places anyway (e.g. for the
Runnable.run() method)).

> You catch all your RuntimeExceptions don't you?
> Remember OutOfMemoryException is not necessarly fatal.

This is not an Exception, but an Error - you would never catch this.

Regards
Harald M. Müller

> matthew
> ----- Original Message ----- 
> From: "Paul J. Lucas" <pauljlucas at mac.com>
> To: <antlr-interest at yahoogroups.com>
> Sent: Tuesday, December 07, 2004 11:10 AM
> Subject: Re: [antlr-interest] exceptions in the lexer
> 
> 
> >
> > On Mon, 6 Dec 2004, Terence Parr wrote:
> >
> > > Are you familiar with the filter option on the lexer grammar?
> >
> > Yes in the sense that I've read that bit of the documentation,
> > but I've never used it.
> >
> > I don't want my entire lexer to be a filter since I need it to
> > be a real lexer for a parser.
> >
> > My particular case at hand is dealing with pragmas that can
> > appear anywhere comments can.  Since comments are most easily
> > handled in the lexer, I handle pragmas there to for the same
> > reason.  The problem is what to do if there's an error in a
> > pragma.  The lexer can't throw user-defined exceptions.  (I
> > might be able to work around it by hiding the real exception
> > inside a Runtime exception, but that's ugly.
> >
> > - Paul
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 

-- 
NEU +++ DSL Komplett von GMX +++ http://www.gmx.net/de/go/dsl
GMX DSL-Netzanschluss + Tarif zum supergünstigen Komplett-Preis!


 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/antlr-interest/

<*> To unsubscribe from this group, send an email to:
    antlr-interest-unsubscribe at yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/