Eclipse Community Forums: TMF (Xtext) » Cross-reference without dot symbol

Home

Home » Modeling » TMF (Xtext) » Cross-reference without dot symbol(Cross-reference without dot symbol)

Cross-reference without dot symbol [message #1820561]

Wed, 22 January 2020 16:19

Eclipse User

Hello,
I have a test grammar with cross-reference

grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals

generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"

Model:
	items+= (Entity | Sublist)* ;

FQN: ID ('.' ID)*;

Entity: 
	'entity' name=ID '{'
	attrs+=Attribute*
	'}' 
;

Attribute:  name=ID ';' ;

Sublist:
	'sublist' entity = [Entity|ID] '{'
		(attrs+=[Attribute|FQN] ';')*
	'}' ;

And all is ok with file

entity EntityA { a;b;c; }
sublist EntityA { EntityA.a; EntityA.b;	}

Is it possible to implement cross-reference to Attribute without dot symbol like

entity EntityA { a;b;c; }
sublist EntityA { a; b;	}

and filter attributes by Entity in custom scope provider?

Re: Cross-reference without dot symbol [message #1820570 is a reply to message #1820561]

Thu, 23 January 2020 00:55

Eclipse User

Hi,

You should implement a scope provider for the sublists
Attribute

from the context retrieve the entity of the sublists
Ask it for it's attributes and put it into the scope

Re: Cross-reference without dot symbol [message #1820574 is a reply to message #1820570]

Thu, 23 January 2020 02:54

Eclipse User

Thank you!

Simple scope provider solves my question:

public class MyDslScopeProvider extends AbstractMyDslScopeProvider {

	@Override
	public IScope getScope(EObject context, EReference ref) {
		
		if (ref == MyDslPackage.Literals.SUBLIST__ATTRS) {
			Sublist sublist=(Sublist) context;			
			return Scopes.scopeFor(sublist.getEntity().getAttrs());
		}
		return super.getScope(context, ref);
	}
}

Previous Topic:	Orion Web Editor: xtext-web functions are not available
Next Topic:	The filename or extension is too long

Goto Forum:

-=] Back to Top [=-

Current Time: Sat Jul 12 12:36:46 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter