[antlr-interest] getting error while generating the grammar

[David Holroyd]

On Fri, Nov 17, 2006 at 10:29:35PM +0530, Vipin Gupta wrote:
> I am getting the error while generating the grammar the following code in
> ANTLR 3. can any one help me to correct this syntax.
> 
> 	expr 	 :	s1=mexpr ((PLUS|MINUS) s2=mexpr)*  -> $s1 (PLUS?
> MINUS? $s2)*
> 		 ; 

It's an unimplemented feature.  The workaround is to label PLUS and
MINUS, and refer to that label on the right hand side.

See,
  http://www.antlr.org/pipermail/antlr-interest/2006-August/017343.html


ta,
dave

-- 
http://david.holroyd.me.uk/