path: root/test/files/run/reify_sort.scala

import scala.reflect.runtime.universe._
import scala.tools.reflect.Eval

object Test extends App {
  reify {
    /** Nested methods can use and even update everything
     *  visible in their scope (including local variables or
     *  arguments of enclosing methods).
     */
    def sort(a: Array[Int]) {

      def swap(i: Int, j: Int) {
        val t = a(i); a(i) = a(j); a(j) = t
      }

      def sort1(l: Int, r: Int) {
        val pivot = a((l + r) / 2)
        var i = l
        var j = r
        while (i <= j) {
          while (a(i) < pivot) i += 1
          while (a(j) > pivot) j -= 1
          if (i <= j) {
            swap(i, j)
            i += 1
            j -= 1
          }
        }
        if (l < j) sort1(l, j)
        if (j < r) sort1(i, r)
      }

      if (a.length > 0)
        sort1(0, a.length - 1)
    }

    def println(ar: Array[Int]) {
      def print1 = {
        def iter(i: Int): String =
          ar(i) + (if (i < ar.length-1) "," + iter(i+1) else "")
        if (ar.length == 0) "" else iter(0)
      }
      Console.println("[" + print1 + "]")
    }

    val ar = Array(6, 2, 8, 5, 1)
    println(ar)
    sort(ar)
    println(ar)
  }.eval
}