[news.eclipse.modeling.m2t] Re: [MTL] How to reverse lists ?

[laurent Goubet <laurent.goubet@xxxxxxx>]

Hi,

This iterate is indeed the way to go for now, the "old" acceleo's 
"nReverse" method has been proposed no equivalent for a simple reason : 
the incoming version of OCL should have its own "collection::reverse()" 
method for this.

Cheers,

Laurent Goubet
Obeo

Guillaume Bourel a écrit :
> Max Bureck a écrit :
> > I don't know about hidden features of Acceleo, but it seems that OCL 
> > does not provide such a method on Collections and the MOF Model To 
> > Text standard does not include such a method in it's library. Here is 
> > a query I used for creating a new sequence that contains the elements 
> > in reverse order:
> >
> > [query reverse(s : Collection(T)) : Sequence(T) =
> >     s->iterate(x; acc : Sequence(T) = Sequence{} |         
> > acc->prepend(x) )/]
> >
> > You will have troubles with the returned collection, due to the 
> > inferred type of the sequence. Here is an example how to use it:
> >
> > [template operationInfo(o : Operation)]
> >     Operation name: [o.name/]
> >     Parameters (reverse): 
> > [o.ownedParameter->reverse()->collect(oclAsType(uml::Parameter)).name/] 
> > [/template]
> >
> > I hope this helps.
> It works well :)
>
> Thanks a lot Mr.Bureck !

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