[antlr-interest] Parsing floats and unary minus
Rick Mann
rmann at latencyzero.com
Sat Apr 24 04:05:12 PDT 2010
On Apr 24, 2010, at 01:34:08, Bart Kiers wrote:
> On Sat, Apr 24, 2010 at 4:25 AM, Rick Mann <rmann at latencyzero.com> wrote:
> float returns [float val]
> : { $val = Float.parseFloat($FLOAT.text); }
> ;
>
> Note that you never use your 'float' rule.
Yeah, I go back and forth, trying to make it work.
> INT : '0'..'9'+
> ;
>
> FLOAT
> : ('0'..'9')+ '.' ('0'..'9')* EXPONENT?
> | '.' ('0'..'9')+ EXPONENT?
> | ('0'..'9')+ EXPONENT
> ;
>
> Try placing FLOAT before INT in your grammar.
That's straight from the ANTLRWorks grammar creation wizard. Is it incorrect?
--
Rick
More information about the antlr-interest
mailing list