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helper attribute [message #1062899]

Tue, 11 June 2013 06:19

Eclipse User

Hello,

I use a helper attribute defined as follows:

helper def: resolved: Set(MM!Element) = Set{};

I add some elements to this set in the "do" section of a rule, to be used in the "using" section of another rule.
But I found that the set is empty in the "using" section, although it prints the contained values in the "do" section of both rules.

Anyone have a clue?

Re: helper attribute [message #1062941 is a reply to message #1062899]

Tue, 11 June 2013 09:41

Eclipse User

Hi Basma,

How are you adding elements to your helper attribute in the do section?

Just adding the elements is not enough, you should also assign the new Set to your attribute. Example below;

thisModule.resolved <- thisModule.resolved.union(anotherCollection);

Cheers

Re: helper attribute [message #1062989 is a reply to message #1062941]

Tue, 11 June 2013 11:53

Eclipse User

I do this ?!!

And the added elements appear in the do section of this rule and in the other rule.
But they don't appear in the using section.
Is this normal, or am I doing something wrong?

[Updated on: Tue, 11 June 2013 11:55] by Moderator

Re: helper attribute [message #1063159 is a reply to message #1062989]

Wed, 12 June 2013 09:54

Eclipse User

I did a quick test and it seems that using sections are executed before rules and do sections no matter what.

I think more experienced ATL people would better explain why this is the case but I think you should find another way to achieve what you are trying to do.

If I understood what you are trying to do correctly, by copying your global attribute to another one and only using/modifying it in that specific rule, you might use it as if it is a local attribute.

Cheers

Re: helper attribute [message #1063193 is a reply to message #1063159]

Wed, 12 June 2013 11:14

Eclipse User

Thanks a lot for your help.
I made a work around and it worked.

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