[antlr-interest] Bug with Java Module Operator

[Terence Parr]

On May 8, 2007, at 2:17 PM, Gavin Lambert wrote:

> At 09:08 9/05/2007, Scott Fortmann-Roe wrote:
> >Using AST rewrite rules, the following throws an error:
> >
> >(op+='!'|'not')* negationExpr 	-> {$op != null && ($op.size() %
> >2)==1}? ^(NOT negationExpr)
> >
> >Something about invalid string template shorthand '%'.
>
> Are you sure you're allowed to put semantic predicates there?  It  
> looks like it ought to be before the arrow (which would make it a  
> validation predicate).

You can use preds in front of multiple ->

a : ...
	-> {...}? ...
	-> {...}? ...
	-> ...
    ;