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| Re: Prioritizing rules in Xtext [message #1180948 is a reply to message #1176551] |
Mon, 11 November 2013 09:08  |
 Jan Koehnlein
Messages: 760
Registered: July 2009
Location: Hamburg |
Senior Member |
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Usually that is a usecase for semantic predicates, but they are on the
parser level and your example must resolve a lexer ambiguity.
Am 08.11.13 13:00, schrieb Arshad Adavani:
> Hi all,
> Is prioritization of rules in Xtext possible?
>
> I mean, say that I have a rule:
>
> SomeRule:
> (ID | Rule) ;
>
> Rule:
> "_"INT
> ;
>
> So, here SomeRule allows either a ID or Rule. When I type in the editor
> I want this SomeRule to look first for "ID" and then for "Rule". Can I
> prioritize like this ?
>
> Well, here Rule is also a part of ID as "_"INT is compatible with ID,
> but, situation for me is a little complex and I just wanted to know
> whether it can be done.
>
>
> Thanks in advance :)
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