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can't use any word same than a keyword in my custom Enum rule [message #896932]

Fri, 20 July 2012 13:25

Cristiano Gavião

Messages: 279
Registered: July 2009

Senior Member

Hi,

I've create a enum rule this way:

Enum:
	'enum' name = ValidID
	'{'
	  (literals+=EnumLiteral ((',')? literals+=EnumLiteral)*)?
	'}'
;

EnumLiteral:
    name=ValidID 
    ('as' literal=STRING)? 
    ('=' value=INT)?
;

But unfortunately, I can't use any word that is a keyword inside this enum.

Is there any way I can handle this ?

thanks,

Cristiano

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Re: can't use any word same than a keyword in my custom Enum rule [message #896942 is a reply to message #896932]

Fri, 20 July 2012 13:40

Christian Dietrich

Messages: 13373
Registered: July 2009

Senior Member

Hi

what about escaping the keyword (uisng tilde) e.g.

enum ~enum {~as as "as"}

Alternatively change your grammar to use

ValidIDPlus: ValidID | "enum" | "as";

~Christian

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Re: can't use any word same than a keyword in my custom Enum rule [message #896955 is a reply to message #896942]

Fri, 20 July 2012 14:10

Cristiano Gavião

Messages: 279
Registered: July 2009

Senior Member

Hi Christian,

well, I think I will go for the first option... but I need inform the user.

Could you tell me how could I get a list of all keywords inside a validation method... this I could compare what the user puts in the enum and warning him that he must escape that error word.

thanks

Cristiano

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Re: can't use any word same than a keyword in my custom Enum rule [message #896956 is a reply to message #896955]

Fri, 20 July 2012 14:18

Christian Dietrich

Messages: 13373
Registered: July 2009

Senior Member

Hi,

what about combining
org.eclipse.xtext.GrammarUtil.getAllKeywords(Grammar)
and
org.eclipse.xtext.IGrammarAccess.getGrammar()

inject the second and call the first from whereever you want

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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