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[ATL] Iterative expression [message #86022]

Mon, 07 July 2008 11:32

Eclipse User

Originally posted by: luciananegri81.yahoo.it

Hello,
I've a questions. I would want iterate on a variable of integer type
and not on an instance. It's possible?
If it's possible, which iterative expression I do use?
Sorry for my english.

Thanks

Lu

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Re: [ATL] Iterative expression [message #86456 is a reply to message #86022]

Sat, 12 July 2008 20:08

Max Bureck

Messages: 72
Registered: July 2009

Member

Hello,

I didn't find a way. But this helpers may be useful:

-- returns a sequence of integers from self to end
helper context Integer def: To(end:Integer):Sequence(Integer) =
if self=end then Sequence{self}
else
if self>end then self->To(end+1)->including(end)
else self->To(end-1)->including(end)
endif
endif;

-- returns a sequence of numbers from 0 to self
helper context Integer def: count():Sequence(Integer) =
0->To(self);

With that helpers you can create sequences of integers to iterate over.
But I guess you won't get high performance with that, especially for
high numbers.

Greetings,
Max

> Hello,
> I've a questions. I would want iterate on a variable of integer type and
> not on an instance. It's possible?
> If it's possible, which iterative expression I do use?
> Sorry for my english.
>
> Thanks
>
> Lu
>

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