when<T> method

T when<T>({ required T map(Map<String, Json>), required T list(List<Json>), required T number(num), required T boolean(bool), required T str(String), required T none(Null), })

Executes the given callback when [this.value is of the type parameter.

Implementation

T when<T>({
  required T Function(Map<String, Json>) map,
  required T Function(List<Json>) list,
  required T Function(num) number,
  required T Function(bool) boolean,
  required T Function(String) str,
  required T Function(Null) none,
}) {
  final v = this;
  if (v is JsonMap) {
    return map(v.value);
  } else if (v is JsonList) {
    return list(v.value);
  } else if (v is JsonNumber) {
    return number(v.value);
  } else if (v is JsonBoolean) {
    return boolean(v.value);
  } else if (v is JsonStr) {
    return str(v.value);
  } else if (v is JsonNone) {
    return none(null);
  }
  throw Error();
}