Scala Dojo - Macro

Macros.scala

/*
* scalac -language:experimental.macros  Macros2.scala  
* scalac -language:experimental.macros  Test.scala
* scala Test
*/


import scala.reflect.makro.Context
import language.experimental.macros

import scala.reflect.makro.Context
import collection.mutable.ListBuffer
import collection.mutable.Stack

object Macros {
   var incDebug = false

   def debug(msg:String) = macro debugImpl

   def debugImpl[C <: Context](c : C)(msg: c.Expr[String]) = {
     import c.mirror._
     import c.universe._
    import Flag._
    import definitions._
    import language.reflectiveCalls
    import c.universe._

     Literal(Constant(s_msg: String)) = msg

     c.reify{ if(incDebug) println("DEBUG: Hello World" ) else println("no debug")  }
   }
}


-----
Test.scala


import Macros._

object Test extends App {
  debug("This is debug")
  println("The End")
}