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NMToken Terminal [message #942245]

Sat, 13 October 2012 09:53

Evangelos Haleplidis

Messages: 3
Registered: October 2012

Junior Member

Greetings,

I'm trying to define an NMToken Terminal for an Xtext 2.3 DSL.

I guess the correct definition is something like this:

terminal NMTOKEN:
('a'..'z' | 'A'..'Z' | '_' | '0'..'9' | '.' | '-' | ':')+;

However that rule has a problem when generating Xtext artifacts:
"The following token definitions can never be matched because prior tokens match the same input: RULE_INT"

And i guess it's true as an NMTOKEN may be an INT as well.

Is there a way to properly define an NMTOKEN terminal or any other way i can incorporate it into my DSL?

Thank you.

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Re: NMToken Terminal [message #942255 is a reply to message #942245]

Sat, 13 October 2012 10:03

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi use a dataype rule instead

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Re: NMToken Terminal [message #942562 is a reply to message #942255]

Sat, 13 October 2012 16:39

Evangelos Haleplidis

Messages: 3
Registered: October 2012

Junior Member

Thanks for the quick response.

I guess you mean i write something like this:

(i didn't write all letters just to test)

NMToken:
('a' | 'b' | 'c' | 'd' | 'e' | 'z' | 'A' | 'B' | 'C' | 'D' | 'E' | 'Z' | '_' | '0' | '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' | '.' | '-' | ':')+;

I tried this after you mentioned it and it creates problem. It affects the RULE_INT and i get errors when i write my files.

Any ideas?

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