Domainmodel:
	(nativeTypes += NativeType)*
	(entities += Entity)*
;

Type: NativeType | Entity;

NativeType:
	'native' (name = ID) ('(' (ports += Port) (',' ports += Port)* ')')
;

Port: name = ID;

Entity:
	'entity' (name = ID) (':' type = [NativeType])? '{' 
		(subentities += Entity)*
		(assignments += Assignment)*
	'}'
;

Assignment:
	(ePath += [Entity] '.')* (port = [Port]) '=' INT
;

public class EntityDslScopeProvider extends AbstractDeclarativeScopeProvider {
	IScope scope_Assignment_port(Assignment context, EReference reference) {
		return getPortScope((Entity)context.eContainer());
	}
	IScope scope_Assignment_port(Entity context, EReference reference) {
		return getPortScope(context);
	}
	
	/** Computes the scope of accessible ports for an entity */
	IScope getPortScope(Entity entity) {
		IScope scope = IScope.NULLSCOPE;
		// Compute the outer scope of ports first
		if (entity.eContainer() instanceof Entity) {
			scope = getPortScope((Entity)entity.eContainer());
		}
		return Scopes.scopeFor(entity.getType().getPorts(), scope);
	}
}