[news.eclipse.modeling.m2m] Re: succesive "collect"

[Ed Willink <ed@xxxxxxxxxxxxx>]

Hi William

The specification for an OCL collect is that it flattens to a non-unique 
variant of the individual returns.

	Regards

		Ed Willink

William Piers wrote:
> Hello,
>
> In fact, collect() will return a Sequence of Sequences. So to iterate 
> over all elements, despite the fact that they are contained by sub 
> sequences, you have to call the flatten() function first (see 
> http://wiki.eclipse.org/ATL/User_Guide#Sequence_data_type_operations for 
> details).
>
> e.g. in your case:
>
> classes <- DSLC!StructureElement.allInstances()
> -> collect(e|e.chapiter) -> flatten()
> -> collect(c | thisModule.SE2C(c) )
>
> Best regards,
>
> William
>
> debutante a écrit :
> > Good afternoon,
> >
> > can we applicate two succesive "collect" like this
> >
> > "classes <- 
> > DSLC!StructureElement.allInstances()->collect(e|e.chapiter='true')->collect(c 
> > | thisModule.SE2C(c) )"
> >
> > thank you