[antlr-interest] lexical rule problem

[Safiye Celik]

Hi,
I have to write a lexical rule such as

a: b c b
b: D | E

and I want 'b' tokens in rule 'a' to be the same. That's, when the first 'b2
in 'a' is D, then the last 'b' should be D. The same is true for E.

To provide this, do I have to write two alternatives for 'a' (that is, a: D
c D | E c E) or is there an easier way to make ANTLR to provide this
condition? I have to use explicit version (righthandside) of rule 'a' in
many rules, so it would be good if I have a chance to write 'a' in one
alternative.

-- 
-safiye
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.antlr.org/pipermail/antlr-interest/attachments/20090825/2a8760c9/attachment.html