Maple combstruct How do I implement pointing in Maple with combstruct? I'm writing a symbolic generating function and I need to do something along the lines of A = Point(B) where Point would be a pointing operation, but I don't think combstruct has such a operation; if so, would there be a way to replicate pointing using combstruct?

There is an undocumented constructor ``combstruct/Theta`` which can be used to signify pointing. It is the reification of $x \frac{d}{dx}$ to the level of grammars. It is not fully supported, but worked in the examples I tried.