module Check

type Val =
    | FNull
    | FBool of bool
    | FInt of int64
    | FFloat of float
    | FStr of string
    | FList of Val list
    | FMap of (string * Val) list
    | FSet of Val list

let my_data: Val = FMap [
    // Server configuration
    ("host", FStr "localhost");  // default host
    ("port", FInt 8080L);
    // Enable debug mode
    ("debug", FBool true)
]
