JSONValue.b.swift

extension JSONValue: Decodable {

  public init(from decoder: Decoder) throws {
    let container = try decoder.singleValueContainer()
    if let value = try? container.decode(Bool.self) {
      self = .boolean(value)
    } else if let value = try? container.decode(Double.self) {
      // Double covers Int as well
      self = .number(value)
    } else if let value = try? container.decode(String.self) {
      self = .string(value)
    } else if let value = try? container.decode([JSONValue].self) {
      self = .array(value)
    } else if let value = try? container.decode([String: JSONValue].self) {
      self = .object(value)
    } else {
      self = .null
    }
  }

}