[antlr-interest] How does INTEGER+ '.' INTEGER+ match "2."?

[Gerald Rosenberg]

------ Original Message (Sunday, August 08, 2010 6:42:55 PM) From: Ken 
Klose ------
Subject: [antlr-interest] How does INTEGER+ '.' INTEGER+ match "2."?
> INTEGER: DIGIT+;
> PRICE: INTEGER '.' INTEGER;
Integer and price are ambiguous and, if "2." is a valid price, need to 
make the decimal field optional.

Try:

INTEGER : DIGIT+
                         (  '.' (DIGIT+)? { $type=PRICE; }  // define 
PRICE  in the token block
                          |  // just an integer
                         )
                 ;