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scope with internal rule [message #641739]

Sat, 27 November 2010 13:56

chuck

Messages: 160
Registered: July 2010

Senior Member

i have a situation like that:

ClassOp:
(
"bla bla "
"{"

( ROps+=ROp)
...
"}";

ROp :
( var=R )
....
"tot("ref= [type::R]
....
;

R returns mm::type:{R} "..." name=ID

the scope:

public IScope scope_ROp_ref(ROp el, EReference r) {
...
}

in scope provider i have problems because the attribute name with ID is internal to R and i'm getting scope into ROp on var ....and i receive 0 suggetions...

thx for the help...

[Updated on: Sat, 27 November 2010 14:35]

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Re: scope with internal rule [message #641743 is a reply to message #641739]

Sat, 27 November 2010 14:25

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

i don 't understand your problem. if you don't have any cross references so scoping does not come in place.
once more: a running sample grammar with the scope provider as you use it would help.

~Christian

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

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Re: scope with internal rule [message #641744 is a reply to message #641743]

Sat, 27 November 2010 14:38

chuck

Messages: 160
Registered: July 2010

Senior Member

sorry ...i totally forgot to indicate where is the crossreference...
i edited my post ...

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Re: scope with internal rule [message #641745 is a reply to message #641744]

Sat, 27 November 2010 15:32

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

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

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

ClassOp:  

"bla" "bla"
"{"

( ROps+=ROp)

"}";

ROp:
var=R
"tot("ref=[R]")";

R :{R} "..." name=ID;

works for me
And what do you you do in your scope provider?

once more a concrete example with a concrete example model and a description of the problem would help.

btw

R returns mm::type:{R} "..." name=ID

looks strage for me

shouldn't that be

R returns type::R :{R} "..." name=ID;

~Christian

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

[Updated on: Sat, 27 November 2010 15:39]

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Re: scope with internal rule [message #641749 is a reply to message #641739]

Sat, 27 November 2010 16:00

Sebastian Zarnekow

Messages: 3118
Registered: July 2009

Senior Member

Hi Chuck,

I don't see any cross reference in your bla-bla grammar snippet so
scoping is unlikely to be used at any point in your sample. Please be
more specific with your questions.

Regards,
Sebastian
--
Need professional support for Eclipse Modeling?
Go visit: http://xtext.itemis.com

Am 27.11.10 14:56, schrieb chuck:
> i have a situation like that:
>
> ClassOp:
> (
> "bla bla "
> "{"
> ( ROps+=ROp)
> ..
> "}";
>
> ROp :
> ( var=R )
> ... bla bla
> ;
>
> R:{R} "..." name=ID
>
> in scope provider i have problems because the attribute name with ID is
> internal to R and i'm getting scope into ROp on var ....and i receive 0
> suggetions...
>
> thx for the help...

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Re: scope with internal rule [message #641750 is a reply to message #641749]

Sat, 27 November 2010 16:01

Sebastian Zarnekow

Messages: 3118
Registered: July 2009

Senior Member

Sorry, I should have refreshed the newsreader.

Am 27.11.10 17:00, schrieb Sebastian Zarnekow:
> Hi Chuck,
>
> I don't see any cross reference in your bla-bla grammar snippet so
> scoping is unlikely to be used at any point in your sample. Please be
> more specific with your questions.
>
> Regards,
> Sebastian

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Re: scope with internal rule [message #641764 is a reply to message #641739]

Sat, 27 November 2010 18:28

chuck

Messages: 160
Registered: July 2010

Senior Member

this is myscope provider...

i should merge 2 list but it should work with this code?
public IScope scope_ROp_ref(ROp ref, EReference r) {
List union=new ArrayList();

EList<ROp> list_new=((ClassOp)ref.eContainer()).getROps();
union.addAll(list_new);
return Scopes.scopeFor(union);

}

what is wrong?? if i delete this scope provider i receive every right elements but i would receive only ones in COp... sorry for the blabla but there are many strings only for debugging...

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Re: scope with internal rule [message #641765 is a reply to message #641764]

Sat, 27 November 2010 18:39

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

you add ROps to the Scope but the ref is of Type R - so you won't get any elements in the scope that match the type of the reference.

Maybe you want to do something like

	public IScope scope_ROp_ref(ROp ref, EReference r) {
		List<R> union=new ArrayList<R>();
		for (ROp rop : ((ClassOp)ref.eContainer()).getROps()) {
			union.add(rop.getVar());
		}
		return Scopes.scopeFor(union);
	}

~Christian

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

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