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[QVTO/OCL] Usage of non-standard "closure" operator [message #548245]

Wed, 21 July 2010 08:57

Christophe Bouhier

Messages: 937
Registered: July 2009

Senior Member

Hi,

With OCL I can use the closure() operator to get a collection of nested
elements.

However in QVTO, I am not sure about the correct syntax.
This below, would give me a warning: Usage of non-standard "closure"
operator"

this.parent.kids->closure(this.parent.kids.kids)->AsOrderedSet();

Is this even supported in QVTO?
thx Christophe

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Re: [QVTO/OCL] Usage of non-standard "closure" operator [message #548263 is a reply to message #548245]

Wed, 21 July 2010 09:29

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi Christophe

asOrderedSet rather than AsOrderedSet.

The MDT/OCL 3.0.0 OCL Standard Library is not easily extensible, so QVTo
and Acceleo have to work much harder than they should to create extended
libraries. It is quite possible that MDT/OCL extensions are not
propagated through.

If you're getting the warning it's probably working. There is an OCL
PromblemOption you can set to switch it off.

Making the OCL Standard Library model-defined is an activity for MDT/OCL
4.0 in Indigo.

Regards

Ed Willink

On 21/07/2010 09:57, Christophe Bouhier wrote:
> Hi,
>
> With OCL I can use the closure() operator to get a collection of nested
> elements.
>
>
> However in QVTO, I am not sure about the correct syntax.
> This below, would give me a warning: Usage of non-standard "closure"
> operator"
>
> this.parent.kids->closure(this.parent.kids.kids)->AsOrderedSet();
>
>
> Is this even supported in QVTO?
> thx Christophe

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