For simple curve not sure...
Nobody has asked yet this !

Surrely simulate Arc circle at the angle, Diff etc...for fillets
Line on the edge Diff etc... for the chamfers

(donc un peu galère pour le moment : personne n'a encore demandé ce genre de chose! ;)

For a volume yes! It's a little tricky for Fillets! (Chamfers not yet directly)

http://moiscript.weebly.com/construct2.html#fillet (in English)

So make first a volume from your rectangle, Fillet the volume and take a slice! ;)
This should be possible in nodes! ;)