Eclipse Community Forums: QVT-OML » Modified parameter 'self' is input only

Help

Home

Home » Modeling » QVT-OML » Modified parameter 'self' is input only

Show: Today's Messages :: Show Polls :: Message Navigator

Modified parameter 'self' is input only [message #1715287]

Sat, 21 November 2015 00:16

Sivka Burka

Messages: 2
Registered: November 2014

Junior Member

Hi Guys

I am exercising with qvto and not sure why qvto editor reports "Modified parameter 'self' is input only" for
self.eAnnotations += object ECORE::EAnnotation{ source :=annsource;};
in
helper ECORE::EModelElement::getOrCreateEAnnForSource(in annsource: String): EAnnotation {
var eann: ECORE::EAnnotation := self.getEAnnotation(annsource);
if(eann=null){
self.eAnnotations += object ECORE::EAnnotation{ source :=annsource;};
};
return eann;
}
My expectation was that it is possible to modify self content in helper (...but not in query?). Am I missing something?

Thanks
Michael

[Updated on: Sat, 21 November 2015 18:04]

Report message to a moderator

Re: Modified parameter 'self' is input only [message #1715422 is a reply to message #1715287]

Mon, 23 November 2015 13:44

Christopher Gerking

Messages: 115
Registered: April 2011

Senior Member

Hi

The 'self' parameter is read-only by default. An explicit 'inout' declaration should do the trick, but Eclipse QVTo seems to support that only for mappings, not for helpers.

helper inout ECORE::EModelElement::getOrCreateEAnnForSource(in annsource: String): EAnnotation {...}

Instead, try converting your helper to a mapping, or pass the EModelElement as a trailing parameter.

Regards
Christopher

Report message to a moderator

Previous Topic:	Tracing QVT interpreter
Next Topic:	Run multiple transformations in parallel

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Thu Apr 25 08:56:19 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter