[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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