[antlr-interest] Handling negative numbers

[Zheng, Xiaoran]

You can just have a lex rule like
 
NUM: ('+'|'-')?('0'..'9')+ ;
 
and in the parser, you would refer to this token as NUM.
 
 
 
________________________________

From: antlr-interest-bounces at antlr.org [mailto:antlr-interest-bounces at antlr.org] On Behalf Of Sathish K
Sent: Thursday, August 17, 2006 7:23 AM
To: antlr-interest at antlr.org
Subject: [antlr-interest] Handling negative numbers


Could anyone please guide me as to how to handle negative numbers while parsing?
I am currently unable to handle the number and the sign as a whole.
 
Thanks,
 
Sat

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