[antlr-interest] Problem using predicates in V3

[Terence Parr]

On Feb 11, 2007, at 1:38 PM, Dr. Hartmut Kocher wrote:

>
> No it doesn't work. I appended the C# code (which ist he same for  
> Java).
>
> Here's the rule:
>
> ID 	:	('abc' DIGIT) => 'abc' | ('a'..'z'|'A'..'Z')
> ('a'..'z'|'A'..'Z'|'_'|'0'..'9')+ ;
>
> If you look at the code, you see that it correctly checks for the  
> predicate.
> It then matches the string, but this does not emit a token!
> Instead it emits a token at the end of the ID rule, with type ID.
>
> This is the part I don't understand, or where a bug might hide...

Oh, i think you have to set the type.  $type = ABC_KEYWORD;  ID is  
just matching stuff and yep, it matches.  It has no idea you mean it  
to be the keyword.  This was a quirk of v2 that it tested every token  
against the literals table.

Ter