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Declarative scope provider disabling qualified namespace [message #1115268]

Mon, 23 September 2013 19:05

Eclipse User

In my grammar I need to specify the scope of references based on the rules that applies. However, the grammar should still allow the references to be entered by both qualified and simple names.

I have extended the AbstractDeclarativeScopeProvider class and added my scope_... method. This works fine; however, I cannot have namespace for the reference anymore when the scope is defined.

How can I define the scope of a reference, but still have Qualified name base namespace (parent.child) enabled? I do not implement a name provider, I just use the default one using the rule QualifiedName : ID.ID;
When I comment the scope provider the namespace based referencing works fine.

Re: Declarative scope provider disabling qualified namespace [message #1115441 is a reply to message #1115268]

Tue, 24 September 2013 01:44

Eclipse User

Hi,

this depends on the implementation of your scope_ method.

org.eclipse.xtext.scoping.Scopes.scopeFor(Iterable<? extends EObject>)
calls org.eclipse.xtext.scoping.Scopes.scopeFor(Iterable<? extends T>, Function<T, QualifiedName>, IScope)

with simplenameprovider as name computation (Function<T, QualifiedName>)
you can change this as you want.

Re: Declarative scope provider disabling qualified namespace [message #1116968 is a reply to message #1115441]

Wed, 25 September 2013 21:45

Eclipse User

Hi Christian,

In my scope_ function I just called Scopes.scopeFor(mylist). I added a DefaultDeclarativeQualifiedNameProvider and defined qualifiedName method for my specific object. Then I replace the scopeFor(list) with scopeFor(mylist, new MyNameProvider, IScope.NULLSCOPE) but this time I can do only full namespace based referencing and I cannot use simplename anymore.

I am looking for a case when I have scoping I can do both qualified and simple name. Is there anything I am doing wrong?

My name provider method is:

QualifiedName qualifiedName(MyObject myObj) {
 if (myObj.eContainer() == null)
  return super.qualifiedName(myObj);
 if (myObj.eContainer() instanceof Parent)
  return QualifiedName.create(((Parent)myObj.eContainer()).getName(), myObj.getName() );
 return super.qualifiedName(myObj);
}

I have a similar method for Parent type object as well. So, after I change the scopeFor to use the nameprovider, it needs a 3 level namescope for referencing.

Re: Declarative scope provider disabling qualified namespace [message #1117133 is a reply to message #1116968]

Thu, 26 September 2013 02:01

Eclipse User

Hi,

sorry i have no idea,

this is out of the box behaviour.
why do you customize the scope method at all.

of course you could expose the stuff with simplle name as well but this wont respect import semantics.

scopeFor(mylist, MyNameProvider, scopeFor(mylist, Simplenameprovider, IScope.NULLSCOPE) )

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