Check If sprite is not covered by shadow

As construct has it's Shadowcaster object, is there any method to trigger event when object is overlapped by shadow?

Like

If Sprite Overlapped by Shadow (tag:""):

----Sprite add 1 to Value

I don't have any examples, as this question is so clear and I need so many games needing this in this very form.

I don't think there's anything for this built in, but what you could do in events is to draw a line between the sprite and each light source of the specified tag. Then if the line touches a caster of the same tag, then the sprite is shaded from that light source. For all sources of the tag, if there is a line between sprite and source which is not blocked, the sprite is not in shadow.