scalarText(source: Text) (answer: Text) {
  answer = dever.json.toText(dever.json.encode(source))
}

decodeList(value: Json) (items: List<Text>) {
  decoded: List<Text> = dever.json.decode(value)
  items = decoded
}

type DecodeResult { Decoded(values: List<Text>)
 error Invalid(cause: dever.json.JsonResult) }

decodeCaptured(value: Json) (answer: Int) {
  decoded: DecodeResult = result(dever.json.decode(value))
  answer = capturedLength(decoded)
}

capturedLength(value: DecodeResult.Decoded(values)) (answer: Int) recover("无效输入返回负数") { answer = length(values) }
capturedLength(value: DecodeResult.Invalid(cause)) (answer: Int) recover("无效输入返回负数") { answer = -1 }

type State { Ready
 Busy }

decodeState(value: Json) (ready: Bool) {
  state: State = dever.json.decode(value)
  ready = state == State.Ready
}

scalarFloat(source: Float) (answer: Text) {
  answer = dever.json.toText(dever.json.encode(source))
}

type Payload { values: List<Int> }

encode(values: List<Int>) (answer: Text) {
  payload = Payload { values = values }
  answer = dever.json.toText(dever.json.encode(payload))
}

type Nested { value: Json }

nested(value: Json) (answer: Text) {
  payload = Nested { value = value }
  answer = dever.json.toText(dever.json.encode(payload))
}

lookup(source: Text) (answer: Int) {
  value = dever.json.fromText(source)
  answer = number(dever.json.propertyValue(value, "count"))
}

number(value: null) (answer: Int) { answer = -1 }
number(value: Json) (answer: Int) { answer = dever.json.asInteger(value) }

update(source: Text) (answer: Text) {
  value = dever.json.fromText(source)
  answer = dever.json.toText(dever.json.setProperty(value, "count", dever.json.integer(43)))
}

document(source: Text) (answer: Text) {
  value = dever.json.parse(source)
  answer = dever.json.stringify(value)
}

type Fixed { text: Text, amount: Int, ratio: Float }

fixedRecord(source: Text, ratio: Float) (answer: Text) {
  value = Fixed { text = source, amount = 7, ratio = ratio }
  answer = dever.json.toText(dever.json.encode(value))
}

arrayText(values: List<Json>) (answer: Text) {
  answer = dever.json.toText(dever.json.array(values))
}