short answer: no, you can't redefine a field in an inherited object, or in
variant branches, even if it's the same type
I hate not being able to give someone the answer they were looking for, so now,
my eagerness to please souring to resentment, I will tell you you are wrong for
asking the question in the first place, and assure you that you don't want to
do it that way.
ahem.
never mind duplicating storage, you're duplicating the inheritance tree in the
`kind` field. will you use `if x is BinaryNode` or `if x.kind in
{Plus,Minus,Multiply,Divide}`? What if they disagree?
I suggest making ASTNode the variant
const BinaryKinds = {Plus,Minus,Multiply,Divide}
type ASTNode = ref object
startPos,endPos: Location
case kind:NodeKind
of FloatNumber: floatValue: float64
of StringToken: stringValue: string
of IntToken: intValue: int64
of BinaryKinds: lhs,rhs:ASTNode
Run
