The example is a bit unfortunate, I used Variant as a container and haven't
noticed it. What I meant is the example below
[play](https://play.nim-lang.org/#ix=4ISG).
Yes, you can use variant as a container, and manually box/unbox it, and that's
exactly what boilerplate code is. Union types don't have such problem.
type
CommandKind = enum eval, replace
Command = object
case kind: CommandKind
of eval:
code: string
of replace:
element_id: string
content: string
proc exec_eval(command: Command) =
if command.kind != eval: raise newException(Exception, "wrong")
discard
proc exec_replace(command: Command) =
if command.kind != replace: raise newException(Exception, "wrong")
discard
proc dispatch(command: Command) =
case command.kind
of eval:
exec_eval(command)
of replace:
exec_replace(command)
let c = Command(kind: eval, code: "alert('hi')")
dispatch(c)
Run
