Supported undo functionality

wickedDesigns

Is there a supported way to perform and then undo an operation in Featurescript?  

My current usage case is that I have an error condition that would be easiest to test by performing an opSplitPart and then evaluating some information about the resulting bodies.  I know that I could opBoolean them back together, but it feels like it would be more efficient to just pop the split off the stack, so to speak (especially if there was a more complex series of operations needed for testing).  I see that there is an abortFeature function, but I am assuming its use isn't supported since it is marked internal.

Perhaps there's a way to declare a sort of private subfeature which performs the error testing and then purposefully fails, throwing its result and thus causing its operations to be undone via the internal feature logic.  Would that be a reasonable approach?  Is there another approach I'm missing?  

NeilCooke

Even if your function throws an error, it would still have split the body to do your test. Probably best to make a copy of the body first then do your split on the copied body, then delete the resultant bodies afterwards. Try the new profiler to see which approach is the most efficient.

lana

You can wrap you test into startFeature(), abortFeature() calls. A simple use example is in

computePatternTangents function in curvePattern.fs of std