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Cannot add supertype X to sealed type Y [message #917760]

Thu, 20 September 2012 12:07

Wouter Schaekers

Messages: 17
Registered: July 2012

Junior Member

Hi

I'm using Xcore to define my model. Then, I convert this model to an Xtext environment.
I've stumbled upon a weird error in my Xtext grammar: 'Cannot add supertype X to sealed type Y'. The problem is that this error only occurs when I load the whole Xcore model in a new workspace and convert it to Xtext.
If I implement the classes one by one, this problem doesn't occur, although the models are (ofcourse) exactly the same. I can generate the Xtext model without a problem.

Has someone any idea how this is possible? Is this a bug?

Thanks.

[Updated on: Thu, 20 September 2012 12:08]

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Re: Cannot add supertype X to sealed type Y [message #1239608 is a reply to message #917760]

Tue, 04 February 2014 15:36

Dénes Harmath

Messages: 157
Registered: July 2009

Senior Member

Unfortunately it is: https://bugs.eclipse.org/bugs/show_bug.cgi?id=391210

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Re: Cannot add supertype X to sealed type Y [message #1239698 is a reply to message #917760]

Tue, 04 February 2014 20:37

Sven Efftinge

Messages: 1823
Registered: July 2009

Senior Member

Could you please try to provide a reduced example, such that we can
reproduce and fix the issue. Please attach it to a fresh bugzilla.
Thanks,
Sven

Am 20/09/12 14:07, schrieb Wouter Schaekers:
> Hi
>
> I'm using Xcore to define my model. Then, I convert this model to an
> Xtext environment.
> I've stumbled upon a weird error in my xtext grammar: 'Cannot add
> supertype X to sealed type Y'. The problem is that this error only
> occurs when I load the whole Xcore model in a new workspace and convert
> it to Xtext.
> If I implement the classes one by one, this problem doesn't occur,
> although the models are (ofcourse) exactly the same. I can generate the
> Xtext model without a problem.
>
> Has someone any idea how this is possible? Is this a bug?
>
> Thanks.

--
Need professional support for Xtext or other Eclipse Modeling technologies?
Go to: http://xtext.itemis.com
Twitter : @svenefftinge
Blog : http://blog.efftinge.de

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