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/* NSC -- new Scala compiler
* Copyright 2005-2009 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc
/** An nsc sub-component.
*
* @author Martin Odersky
*/
abstract class SubComponent {
/** The global environment; overridden by instantiation in Global. */
val global: Global
/** The name of the phase */
val phaseName: String
/** New flags defined by the phase which are not valid before */
def phaseNewFlags: Long = 0
/** New flags defined by the phase which are not valid until immediately after it */
def phaseNextFlags: Long = 0
/** The phase factory */
def newPhase(prev: Phase): Phase
private var ownPhaseCache: Phase = _
private var ownPhaseRunId = global.NoRunId
/** The phase corresponding to this subcomponent in the current compiler run */
def ownPhase: Phase = {
if (ownPhaseRunId != global.currentRunId) {
ownPhaseCache = global.currentRun.phaseNamed(phaseName)
ownPhaseRunId = global.currentRunId
}
ownPhaseCache
}
/** The phase defined by this subcomponent. Can be called only after phase is installed by newPhase. */
// lazy val ownPhase: Phase = global.currentRun.phaseNamed(phaseName)
/** A standard phase template */
abstract class StdPhase(prev: Phase) extends global.GlobalPhase(prev) {
def name = phaseName
override def newFlags = phaseNewFlags
override def nextFlags = phaseNextFlags
}
}
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