?start: value

?value: object
        | array
        | string
        | SIGNED_NUMBER      -> number
        | "true"             -> true
        | "false"            -> false
        | "null"             -> null

array  : "[" [value ("," value)*] "]"
object : "{" [pair ("," pair)*] "}"
pair   : string ":" value

string : ESCAPED_STRING

%import common.ESCAPED_STRING
%import common.SIGNED_NUMBER
%import common.WS

%ignore WS