I have an EMF metamodel containing Abstract Class A and Concrete Classes B & C implement A.
In XText I can have a rule such as A: B | C; and refer to A in other rules.
Is there a way not to have to declare the rule for A and have a default rule used for abstract classes (which would be OR(All concrete children)) by Just providing the rules for B and C?
it is not possible to call rules you don't have nor a catch all children
if you just want to have child rules and add a parent to them without a explicit rule for the parent
you can do
B returns A:
{B} "b" name=ID;