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[Acceleo] Query overloadings [message #690784]

Thu, 30 June 2011 08:16

Ed Willink

Messages: 7635
Registered: July 2009

Senior Member

Hi

templates support polymorphic dispatch to produce text
queries support ..... dispatch to produce intermediate values

I know it's not in the specification, but equally it's not not in the
specification, so why don't queries dispatch polymorphically?
It's a pain having to do if oclIsKindOf trees in a massive query.

Regards

Ed Willink

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Re: [Acceleo] Query overloadings [message #690886 is a reply to message #690784]

Thu, 30 June 2011 11:34

Stephane Begaudeau

Messages: 458
Registered: April 2010
Location: Nantes (France)

Senior Member

Hi Ed,

Well that's an old debate for us in the Acceleo dev' team and it is far from being closed. Some people think that query overloading and polymorphism with query could be a nice addition. It may not be that simple because it opens the door to the several other questions on overriding templates with queries or queries with templates and polymorphism between templates and queries, etc. I think that's an interesting question, and I think that at least polymorphism should be taken into account for queries but Acceleo 3.1 was not about the introduction of new behavioral feature in the Acceleo language so maybe later.

Regards,

Stephane Begaudeau, Obeo

--
Twitter: @sbegaudeau
Blog: http://stephanebegaudeau.tumblr.com
Acceleo Documentation: http://docs.obeonetwork.com/acceleo

[Updated on: Thu, 30 June 2011 11:35]

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Re: [Acceleo] Query overloadings [message #690975 is a reply to message #690886]

Thu, 30 June 2011 13:33

Ed Willink

Messages: 7635
Registered: July 2009

Senior Member

Hi Stephane

Good. Perhaps a good time to get you all talking again.

I can't see the query/template problem; a conflict is an error; cf a
Java static and non-static operation conflict.

After a skim-read of the specification, it looks as if you can just copy
the template overloading rules across to query.

Regards

Ed Willink

On 30/06/2011 13:34, Stephane Begaudeau wrote:
> Hi Ed,
>
> Well that an old debate for us in the Acceleo dev' team and it is not
> closed. Some people think that query overloading and polymorphism with
> query could be a nice addition. It may not be that simple because it
> opens the door the several other questions on overriding templates
> with queries or queries with templates and what about polymorphism
> between templates and queries. I think that's an interesting question,
> and I think that at least polymorphism should be taken into account
> for queries but Acceleo 3.1 was not about the introduction of new
> behavioral feature in the Acceleo language so maybe later.
>
> Regards,
>
> Stephane Begaudeau, Obeo
>
> --
> Twitter: http://twitter.com/#!/sbegaudeau
> Blog: http://stephanebegaudeau.tumblr.com
> Acceleo Documentation: http://docs.obeonetwork.com/acceleo

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