Inheritance?

[edwardribbit]

This is an idea and I don't know if it's possible to implement Is there a simple way to select from a set of variables like inheritance in the code?

A:
  my_var:
    my_int: {type: int}
B:
  my_var:
    my_int: {type: int}

Use case (pseudocode)

auto my_var;
if(A){
  my_var = A.my_var;
}else if(B){
  my_var = B.my_var;
}

print(my_var.my_int)

[edwardribbit]

I realize this looks similar to a map parameter...