Unsealed AnyVal.

Hacks here and there to allow them to survive at least
to erasure.  Since nothing is done with them there yet, they
inevitably crash and burn a little ways beyond that.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/compiler/scala/reflect/internal/Trees.scala b/src/compiler/scala/reflect/internal/Trees.scala
index 5bb0c98bfb..7ce087df2f 100644
--- a/src/compiler/scala/reflect/internal/Trees.scala
+++ b/src/compiler/scala/reflect/internal/Trees.scala
@@ -10,6 +10,18 @@ import Flags._
 import api.Modifier
 
 trait Trees extends api.Trees { self: SymbolTable =>
+  
+  // Belongs in TreeInfo but then I can't reach it from TreePrinters.
+  def isReferenceToScalaMember(t: Tree, Id: Name) = t match {
+    case Ident(Id)                                          => true
+    case Select(Ident(nme.scala_), Id)                      => true
+    case Select(Select(Ident(nme.ROOTPKG), nme.scala_), Id) => true
+    case _                                                  => false
+  }
+  /** Is the tree Predef, scala.Predef, or _root_.scala.Predef?
+   */
+  def isReferenceToPredef(t: Tree) = isReferenceToScalaMember(t, nme.Predef)
+  def isReferenceToAnyVal(t: Tree) = isReferenceToScalaMember(t, tpnme.AnyVal)
 
   // --- modifiers implementation ---------------------------------------