Re: JavaCC question - why does this happen?

"VBDis" <vbdis@aol.com>
8 Sep 2002 22:43:26 -0400

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JavaCC question - why does this happen? megadeth@terra.com.br (Leonardo Hyppolito) (2002-09-03)
Re: JavaCC question - why does this happen? vbdis@aol.com (VBDis) (2002-09-08)
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From: "VBDis" <vbdis@aol.com>
Newsgroups: comp.compilers
Date: 8 Sep 2002 22:43:26 -0400
Organization: AOL Bertelsmann Online GmbH & Co. KG http://www.germany.aol.com
References: 02-09-021
Keywords: parse
Posted-Date: 08 Sep 2002 22:43:26 EDT

<megadeth@terra.com.br> schreibt:


>< num: (<dig>) (<dig>)* ( (",") (<dig>) )? >
>
>IT SHOULD accept my number "9" as a <num> token, right??


I have no idea of JavaCC, but the most probable explanation here is: (<dig>)*
means 1 or more digits, not 0 or more. This would at least explain, why longer
numbers are accepted.


Consequently I'd try:


< num: (<dig>)* ( (",") (<dig>) )? >


and include ,9 into the test data, to determine whether * accepts 0 occurences.


DoDi

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