Demonstrates a problem with by-name parameter extraction

problem.scala

// Inspired by http://stackoverflow.com/questions/29757584/handling-by-name-parameters-in-scala-macro

import scala.reflect.runtime.universe._

class X { def x(i: => Int, second: String, other: Int*) = i * 2 }

val typeSignature = typeOf[X].member(TermName("x")).typeSignature
val paramTypes = typeSignature match {
  case MethodType(params, _) => params map { _.typeSignature }
}

// Need to be assigned here because they are voltaile
val javaRepeatedParamDefinition = definitions.JavaRepeatedParamClass
val repeatedParamDefinition = definitions.RepeatedParamClass
val byNameDefinition = definitions.ByNameParamClass

// `signature` for the first and third parameters matches on whichever one of these cases is first.
val byNameParams = paramTypes map { signature =>
  signature match {
    case TypeRef(_, javaRepeatedParamDefinition, args) =>
      println("Got JavaRepeatedParamClass")
      args
    case TypeRef(_, repeatedParamDefinition, args) =>
      println("Got repeatedParamDefinition")
      args
    case TypeRef(_, byNameDefinition, args) => 
      println("Got byNameDefinition")
      args
  }
} // byNameParams = List(List(scala.Int), List(), List(scala.Int))