Re: [henshin-dev] Specifying the number of unit/rule applications with p

[Christian Krause <henshin.ck@xxxxxxxxx>]

I am now thinking it would be more consistent if we introduced a unit 
type "IteratedUnit" (to avoid confusion with CountedUnit) with a String 
attribute "iterations" and one subunit. The number of iterations will be 
computed when the unit is executed (as described below)

Chris

Am 14.06.2012 09:39, schrieb Christian Krause:
> Hi,
>
> I noticed that it would be a useful feature to support the 
> specification of the number of applications of transformation units or 
> rules by parameters. I think Felix also had this idea a while ago. To 
> be clear, I do not want to introduce CountedUnit again, but a way to 
> specify the number of applications using a parameter. This would be 
> very useful, e.g. in the comb pattern example (I can also imagine 
> other scenarios where this would be useful).
>
> This could be a way of doing it: we add a String attribute 
> "applications" to TransformationUnit. If it is set, it will be 
> evaluated using the JavascriptEngine (using the specified parameter 
> values), which should return an integer n. Then the rule or unit is 
> tried to be n times. The application returns true if it could be 
> applied n times, false otherwise.
>
> For example, if I want to apply a rule n^2 times, I could just add a 
> parameter "n" and set the applications attribute to "n*n".
>
> cheers,
> christian