public type Value {
  Null
  Boolean(value: Bool)
  Number(raw: Text)
  String(text: Text)
  Array(children: List<Int>)
  Object(members: Map<Text, Int>)
}

public type Document {
  root: Int
  nodes: List<Value>
}

public type ParseResult {
  Parsed(document: Document)
  error Failed(position: Int, message: Text)
}

public type WriteResult {
  Written(text: Text)
  error Failed(node: Int, message: Text)
}