[antlr-interest] predicate and ambiguity
Lloyd Dupont
ld at galador.net
Sun Jul 8 16:31:07 PDT 2007
> =============
> unary : (PLUS|MINUS)? cast ;
>
> cast : {isType(input.LT(2))}? (LPAREN ID RPAREN) cast
> | primary
> ;
> =============
>
ok thanks!
I have one more question about predicate.
Yesterday I did write something like that (MyFunction(input.LT(2).Text)),
validating the text of the token.
But what if I should not validate a Token but a rule, as in:
parserrule:
{ Function(otherparserrule) }? TOK1 otherparserrule TOK2
| alternative
;
what if I have a rule like that. How could I write that?
I bet I cannot write input.LT(2) because I'm reading a parser rule and not a
simple token..
Any tips?
Thanks for the help so far! :-)
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