Scala example source code file (Phases.scala)

This example Scala source code file (Phases.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

calculate, metalevels, phases, reflection, reifier, reify, reshape, tree

The Phases.scala Scala example source code

package scala.reflect.reify

import phases._

trait Phases extends Reshape
                with Calculate
                with Metalevels
                with Reify {

  self: Reifier =>

  import global._

  private var alreadyRun = false

  lazy val mkReificationPipeline: Tree => Tree = tree0 => {
    assert(!alreadyRun, "reifier instance cannot be used more than once")
    alreadyRun = true

    var tree = tree0

    if (reifyDebug) println("[calculate phase]")
    calculate.traverse(tree)

    if (reifyDebug) println("[reshape phase]")
    tree = reshape.transform(tree)
    if (reifyDebug) println("[interlude]")
    if (reifyDebug) println("reifee = " + (if (settings.Xshowtrees || settings.XshowtreesCompact || settings.XshowtreesStringified) "\n" + nodePrinters.nodeToString(tree).trim else tree.toString))

    if (reifyDebug) println("[calculate phase]")
    calculate.traverse(tree)

    if (reifyDebug) println("[metalevels phase]")
    tree = metalevels.transform(tree)
    if (reifyDebug) println("[interlude]")
    if (reifyDebug) println(symtab.debugString)

    if (reifyDebug) println("[reify phase]")
    val result = reify(tree)

    result
  }
}