Welcome to Scala version 2.10.3 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_45).
Type in expressions to have them evaluated.
Type :help for more information.

scala> object Mover {
     |   import scala.reflect.macros.Context
     |   def moveTreeMacro(c: Context)(e: c.Expr[Any]): c.Expr[Any] = {
     |     import c._
     |     import c.universe._
     |     val ee = c.Expr(c.resetLocalAttrs(e.tree))
     |     reify {
     |       new AnyRef {
     |         def moved = {
     |           ee.splice
     |         }
     |       }
     |     }
     |   }
     |   import scala.language.experimental.macros
     |   def moveTree(e: Any): Any = macro moveTreeMacro
     | }
defined module Mover

scala> Mover.moveTree {
     |   case class C()
     | }
<console>:10: error: C is already defined as (compiler-generated) case class companion object C
                case class C()
                           ^