[antlr-interest] Actions and non-LL(*) rules ??

[Terence Parr]

On May 2, 2010, at 4:26 PM, Marcin Rzeźnicki wrote:

> On Mon, May 3, 2010 at 12:55 AM, Terence Parr <parrt at cs.usfca.edu> wrote:
>> hi. actions hide semantic predicates...got any?
>> T
>> On May 2, 2010, at 2:43 PM, Marcin Rzeźnicki wrote:
> 
> Yes, quite a lot :-) Could you elaborate? In what way they do "hide" them?

ANTLR cannot test a predicate during prediction (before alt executes) if an action is in front of it:

a : {action} {p}? ID
  | ID
  ;

action could alter results of p.

Ter