[antlr-interest] Problem with " => " operator

[Ali Salehi]

Hi all,

 I'm a beginner Antlr user, I bought the antlr v3 reference book and I'm
trying to get SQL-92 simplified select statement parser working.

 I have some strange issues with the antlr, for
instance, when I want to test the following grammar inside AntlrWorks GUI:

grammar t;
k : (A)=>A |A;
A : 'a';

I see that antlr fails to parse my sample input which is simply  the
character of "a"  [without qutations ;) ].

It says: NoViableException

The grammar is so simple that I barely can see any error there, I appreciate
some comments
from more advanced users :-) .


Best regards,
AliS
**************************************************************
Ali Salehi, LSIR - Distributed Information Systems Laboratory
EPFL-IC-IIF-LSIR, Bâtiment BC, Station 14, CH-1015 Lausanne, Switzerland.
http://lsirwww.epfl.ch/
email: ali.salehi at epfl.ch
Tel: +41-21-6936656 Fax: +41-21-6938115
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