A concise JSON DSL in Scala.

Jsson.scala

import scala.util.DynamicVariable
/**
 * A concise JSON DSL in Scala.
 * When you want to use, only 
 * import Jsson._ is needed.
 * Note that this program change the semantics of standard -> operator.
 * I recommend that you use enclosing block with Jsson as followings:
 * {
 *    import Jsson._
 *    val obj = %{
 *      ...
 *    }
 * }
 */
object Jsson {
  private val values = new DynamicVariable[Map[String, Any]](null)
  class Arrow(receiver: String) {
    def ->(value: Any) {
      values.value = values.value + ((receiver, value))
    }
  }
  implicit def pimpArrow(arg: String): Arrow = new Arrow(arg)
  def %(body: => Any): Map[String, Any] = {
    values.withValue(Map[String, Any]()) {
      body
      values.value
    }
  }
  def $(elements: Any*): List[Any] = {
    elements.toList
  }
  def main(args: Array[String]) {
    // Example program
    val obj = %{
      "x" -> 10
      "y" -> 20
      "z" -> %{
        "a" -> $(1, 2, 3, 4, 5)
        "b" -> $(6, 7, %{ "xx" -> "yy" })
      }
    }
    println(obj)
  }
}