Well Nim is a statically typed language safety in mind so its not really
designed to do what you request.
If you know what all the possible types are you can use a sequence of object
variants. ( This is basically what the JSON library is anyway )
type
NodeKind = enum # the different node types
nkInt, # a leaf with an integer value
nkFloat, # a leaf with a float value
nkString # a leaf with a string value
Node = ref object
case kind: NodeKind # the ``kind`` field is the discriminator
of nkInt: intVal: int
of nkFloat: floatVal: float
of nkString: strVal: string
var n = @[
Node(kind: nkFloat, floatVal: 1.0),
Node(kind: nkString, strVal: "Simple")
]
n.add Node(kind: nkInt, intVal: 3)
Run
