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toString helper [message #1059487] Sun, 19 May 2013 13:04 Go to next message
Basma Moukhtar is currently offline Basma Moukhtar
Messages: 22
Registered: June 2010
Junior Member

Dears,
I have a helper that's defined as this:

helper context MyPackage!MyClass def: toString() : String = 'Self To String;'


But I need to set a boolean attribute in self (MyPackage!MyClass) to true when the "toString" function is called.
I can't write self.myAttibute=true because my helper returns string.

How can I do this?

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Re: toString helper [message #1059689 is a reply to message #1059487] Tue, 21 May 2013 04:46 Go to previous messageGo to next message
Hugo Bruneliere is currently offline Hugo Bruneliere
Messages: 469
Registered: July 2009
Senior Member
Hello,

If you want to set an attribute helper, you have to do it in the "do" section of the corresponding matched rule (e.g.; the one in which your toString helper is actually called).

------------------------------------------
Hugo Bruneliere - R&D Engineer
AtlanMod research team (Inria, EMN & LINA)
Ecole des Mines de Nantes
Nantes - France
------------------------------------------

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Re: toString helper [message #1059707 is a reply to message #1059689] Tue, 21 May 2013 06:02 Go to previous messageGo to next message
Basma Moukhtar is currently offline Basma Moukhtar
Messages: 22
Registered: June 2010
Junior Member

But toString is called from another helper that is called from a query not a rule.
So, is there a way to set an attribute in a helper?

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Re: toString helper [message #1059720 is a reply to message #1059707] Tue, 21 May 2013 07:24 Go to previous message
Hugo Bruneliere is currently offline Hugo Bruneliere
Messages: 469
Registered: July 2009
Senior Member
Unfortunately, you cannot add "do" sections to ATL queries.
Maybe you could try to express differently inside your query the needed condition.

------------------------------------------
Hugo Bruneliere - R&D Engineer
AtlanMod research team (Inria, EMN & LINA)
Ecole des Mines de Nantes
Nantes - France
------------------------------------------

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