Re: [henshin-dev] Working with list attributes

[Christian Krause <henshin.ck@xxxxxxxxx>]

One more note: in the graphical editor, you can use the arrow notation 
to define a change in a list attribute. So you would write something like:

x -> x.add(new Integer(4)); x;

Don't forget to define x as rule parameter.

Cheers,
Christian

Am 2/1/2013 11:45 AM, schrieb Christian Krause:
> Hi all,
>
> I added support for working with list attributes. Say you have an 
> attribute of type int with an upper bound of -1. There are two 
> possible ways for handling these attribute values:
>
> - as constants: you use as attribute value a comma-separated list of 
> constants surrounded by brackets, e.g. [1,2,3]. Henshin will 
> automatically treat this as a list of integers.
>
> - matching the lists by parameters: say you have a parameter x in your 
> rule, you can match it with the list attribute value of an object. You 
> can then use JavaScript to manipulate the list. For example, you can 
> write
>
> x.add(new Integer(4)); x;
>
> to add 4 to the integer list. Note that the "return"-value of the 
> expression must be the (modified) list.
>
> Cheers,
> Christian
>
> PS: I will commit the code in the evening. The new version should be 
> available in 24-48 hours at the nightly builds update site. Also, 
> there are two new tests for this new feature.