[antlr-interest] Re: comment must be preceded by whitespace

charlesskelton c.skelton at skelton.de
Wed Mar 17 16:22:37 PST 2004


Nice idea, but ynfortunately not - I need the \n to return as a 
token by itself.

Any other suggestions?

Thanks,
Charlie
--- In antlr-interest at yahoogroups.com, Terence Parr <parrt at c...> 
wrote:
> On Mar 17, 2004, at 3:45 PM, charlesskelton wrote:
> 
> > I'm new to antlr.
> >
> > I'm trying to write lexer for a language, k, in which single line
> > comments begin with a '/'. If there is no whitespace before 
the '/',
> > or the '/' is not in column 1, then it is not a comment.
> 
> Try
> 
> comment : {getColumn()==1}? '/' (~'\n')* '\n' {newline();} ;
> 
> would that work?
> 
> Ter
> --
> Professor Comp. Sci., University of San Francisco
> Creator, ANTLR Parser Generator, http://www.antlr.org
> Cofounder, http://www.jguru.com
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