new make(InStream in, Dict? opts := null)

Wrap input stream. By default, the reader decodes JSON in the Haystack 4 (Hayson) format. Use the v3 option to decode JSON in the Haystack 3 format.

The following opts are supported:

• v3 (Marker): read JSON encoded in the Haystack 3 format

g := JsonReader(in).readGrid

val := JsonReader(in, Etc.makeDict(["v3":Marker.val])).readVal

Dict opts { private set }

virtual override Grid readGrid()

Convenience for readVal as Grid

Obj? readVal(Bool close := true)

Read a value and auto close stream