[antlr-interest] Semantic predicate hoisting - How to turn off? (somewhat urgent)

[Terence Parr]

Hi. Predicates cannot in general reference local variables or  
parameters because they can be hoisted out of that rule.  Usually  
this is no problem.  I suspect your use of $f and so on is not  
correct as it probably references a labeled element after the  
predicate.  try stuff like input.LT(1) etc...

Ter
On May 29, 2007, at 12:16 PM, Panayiotis wrote:

> Hi!
>
> In ANTLR 3 is the new semantic predicate hoisting feature turned on  
> by default?
> I believe it is, because I'm getting javac errors like:
>
> [21:47:11] \tmp\antlrworks\pclParser.java:4225: cannot find symbol
> [21:47:11] symbol  : variable f
> [21:47:11] location: class pclParser
> [21:47:11]                         if ( (((evalPredicate 
> (we,"$we.is_l_value")&&evalPredicate(f,"$f.is_l_value"))|| 
> evalPredicate(we,"$we.is_l_value"))) ) {
>
> when in fact "$we.is_l_value" and "$f.is_l_value" never appear in  
> the same rule. Either that or am I doing something fundamentally  
> wrong :-) .
> There were literally dozens of similar errors that disappeared as  
> soon as I added the option "k=1;". Is there a similar option to  
> disable predicate hoisting and any other advanced features ANTLR  
> may have enabled by default?
>
> I need to get this working within the week, so I'll greatly  
> appreciate any help you can offer me!