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Scala 2.12 does not name mangle private fields (#21742)

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When we can emit a private field, no need to mangle its name

https://github.com/scala/community-builds/pull/317\#issuecomment-254931492
This commit is contained in:
Roland Kuhn 2016-10-28 13:00:34 +02:00 • committed by Konrad Malawski
parent 84184fe1a2
commit 021c2cbfdd
1 changed files with 9 additions and 1 deletions
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10
akka-typed/src/main/scala/akka/typed/internal/ActorRefImpl.scala
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@ -139,6 +139,7 @@ private[typed] object WatchableRef {
private[typed] class FutureRef[-T](_p: a.ActorPath, bufferSize: Int, f: Future[ActorRef[T]]) extends WatchableRef[T](_p) {
import FutureRef._
// Keep in synch with `targetOffset` in companion (could also change on mixing in a trait).
@volatile private[this] var _target: Either[ArrayList[T], ActorRef[T]] = Left(new ArrayList[T])
f.onComplete {
@ -190,5 +191,12 @@ private[typed] class FutureRef[-T](_p: a.ActorPath, bufferSize: Int, f: Future[A
}
private[typed] object FutureRef {
val targetOffset = unsafe.objectFieldOffset(classOf[FutureRef[_]].getDeclaredField("akka$typed$internal$FutureRef$$_target"))
val targetOffset = {
val fields = classOf[FutureRef[_]].getDeclaredFields.toList
// On Scala 2.12, the field's name is exactly "_target" (and it's private), earlier Scala versions compile the val to a public field that's name mangled to "akka$typed$internal$FutureRef$$_target"
val targetField = fields.find(_.getName.endsWith("_target"))
assert(targetField.nonEmpty, s"Could not find _target field in FutureRef class among fields $fields.")
unsafe.objectFieldOffset(targetField.get)
}
}