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Registering both relative and fully qualified name in Scope [message #1785684]

Wed, 18 April 2018 11:05

Erwann Traisnel

Messages: 14
Registered: June 2017

Junior Member

Hello ,

I am facing an issue with my scoping right now ,
Given 2 files

file1.myDSL

module myModule{
    typedef long myLong;
}

file2.myDSL

#include "file1.myDSL"

module myModule{
    typedef myLong myLong2;  //Not Working but should work
    typedef myModule.myLong myLong3; //Working
}

I would like to be able to reference an object from an imported file, both with its RelativeQualifiedName and FullyQualifiedName .

My idea was , given a context (here , typedef myLong myLong2)
if its container's full qualified name(FQN) is present in the scope,
then each element of the scope registered with a name starting with that fqn shall also be registered with their relative qname(container's FQN - object FQN)

Any tips on how to solve that ?

Erwann

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Re: Registering both relative and fully qualified name in Scope [message #1785687 is a reply to message #1785684]

Wed, 18 April 2018 11:22

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

how did you implement the includes?

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Registering both relative and fully qualified name in Scope [message #1785688 is a reply to message #1785687]

Wed, 18 April 2018 11:26

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

or do you use it all all?

you might need to customize the scope provider delegate

so that what the following method does:
org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider.getLocalElementsScope(IScope, EObject, EReference)

is done for the global scope too.

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Registering both relative and fully qualified name in Scope [message #1785689 is a reply to message #1785684]

Wed, 18 April 2018 11:37

Erwann Traisnel

Messages: 14
Registered: June 2017

Junior Member

The includes use importURI

They are correctly resolved and when the scope is built, objects from the import are in a ImportScope , described with their FQN.

However I didn't completely understand you answer ,
Do you mean I would have to call
org.eclipse.xtext.scoping.impl.ImportedNamespaceAwareLocalScopeProvider.getLocalElementsScope(IScope, EObject, EReference)

with IScope, the GlobalScope ?

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Re: Registering both relative and fully qualified name in Scope [message #1785690 is a reply to message #1785689]

Wed, 18 April 2018 11:55

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

no the idea is that you wrap your scope into a import scope with an import "myModule.*"

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: Registering both relative and fully qualified name in Scope [message #1785742 is a reply to message #1785684]

Thu, 19 April 2018 09:07

Erwann Traisnel

Messages: 14
Registered: June 2017

Junior Member

That worked , thanks a lot Christian !
Here I share the snippet of code, just in case someone looks for the same answer :

if(scope instanceof ImportScope){
			Module module = EcoreUtil2.getContainerOfType(context, Module.class);
			//Module is the qualifying element 
			if(module != null){
				QualifiedName qname = qualifiedNameProvider.getFullyQualifiedName(module);				
				if(qname != null){
					ImportNormalizer importNormalizer = new ImportNormalizer(qname, true, true);
					scope = new ImportScope(Collections.singletonList(importNormalizer), scope, null, reference.eClass(), false);
				}
			}
		}	
 }

Thanks for your help !

Erwann

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