[antlr-interest] speaking of => etc...

[Bill Canfield]

Olivier Dragon wrote:
> (...)?             optional subrule
> (...)#>            syntactic predicate
> {...}>>            hoisting disambiguating semantic predicate
> {...}=>            gated semantic predicate

I agree with Olivier, ()? is a time-honored convention.  I hope the 
ANTLR 2 conventions of ()?, ()*, and ()+ would be carried forward.

Also, why bother changing the [] argument syntax?

If consistency is a goal, it seems like all predicates should be wrapped 
in curlies.  Regular parens denote syntax grouping.  Square brackets for 
arguments.

And in the name of all that's holy, please don't bring in angle 
brackets!  What's next, dollar signs and percents?  :-).

Bill