[antlr-interest] Any syntax predicate can be removed.

[Ruslan Zasukhin]

Hi Lorin,

Once you have write on list

> If you are writing a new grammar, then "predicates are your friend" is
> good practice for getting past the "Omigod--look at all these
> warnings" stage.  Wherever you have an ambiguity warning that you
> cannot figure out quickly, insert a (syntactic) predicate to
> disambiguate alternatives.  Also, consider inserting semantic
> predicates as "assertions".  Once you get a warning-free antlr pass,
> verify that the generated language processor properly recognizes your
> test input (catch exceptions in the debugger at the point where they
> are thrown).  You may want to have a test version of your language
> processor which produces some sort of text output that can be fed to
> "diff" for regression testing.  Once you get the translator working,
> then go back and refactor on a predicate-by-predicate basis--it's a
> lot easier to clean up ambiguities when you know where to look, and
> having a test suite to run makes it easier to verify correct operation
> after each change.

So I want to clarify.

If ANY syntax predicate can be removed from a grammar ?

Or sometimes we must shut up, and use them ?

-- 
Best regards,
Ruslan Zasukhin      [ I feel the need...the need for speed ]
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