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[Acceleo] How to generate a sequence (bag) of consecutive integers starting at 1 [message #813218]

Mon, 05 March 2012 01:34

Tomas Balderas

Messages: 64
Registered: July 2010

Member

Hello

I hope anyone can help me. I am assigning numbers as names of input pins in an action in an activity diagram. From this collection of input pins I am successfully computing a sequence (or bag) of integers (instances of Integer). What I need to determine now is whether such sequence (or bag) equals the sequence {1, 2, 3, 4, ... , n}.

My strategy is to generate the sequence {1, 2, 3, 4, ... , n} by using an expression like

Integer.allInstances()
->collect(i: Integer | i <= [an expression to compute the value of n])
->asBag()

and then compare this bag to the one I computed from the input pins.

My problem is that the expression that computes {1, 2, 3, 4, ... , n} illustrated above does not seem to work.

Any idea to generate the sequence of integers {1, 2, 3, 4, ... , n}? Any idea to determine if a sequence of integers equals the sequence {1, 2, 3, 4, ... , n} in a more elegant way?

Thank you very much.

UPDATE: I used select instead of collect in the expresion and it did not work either:

Integer.allInstances()
->select(i: Integer | i <= [an expresion to compute the value of n])

I get nothing when trying to generate text from the result of this expression

/T

/TB

[Updated on: Mon, 05 March 2012 03:18]

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Re: [Acceleo] How to generate a sequence (bag) of consecutive integers starting at 1 [message #813390 is a reply to message #813218]

Mon, 05 March 2012 07:47

Ed Willink

Messages: 7106
Registered: July 2009

Senior Member

Hi

Try Sequence{1..n}.

Regards

Ed Willink

On 05/03/2012 01:34, Tomas Balderas wrote:
> Hello
>
> I hope anyone can help me. I am assigning numbers as names of input
> pins in an action in an activity diagram. From this collection of
> input pins I am successfully computing a sequence (or bag) of integers
> (instances of Integer). What I need to determine now is whether such
> sequence (or bag) equals the sequence {1, 2, 3, 4, ... , n}.
>
> My strategy is to generate the sequence {1, 2, 3, 4, ... , n} by using
> an expresion like
>
> Integer.allInstances()
> ->collect(i: Integer | i <= [an expresion to compute the value of n])
> ->asBag()
>
> and then compare this bag to the one I computed from the input pins.
>
> My problem is that the expresion that computes {1, 2, 3, 4, ... , n}
> illustrated above does not seem to work.
>
> Any idea to generate the sequence of integers {1, 2, 3, 4, ... , n}?
> Any idea to determine if a sequence of integers equals the sequence
> {1, 2, 3, 4, ... , n} in a more elegant way?
>
> Thank you very much.
>
> /T

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