From ca3a272ce620c618684432646ca1614ddc3c0b3d Mon Sep 17 00:00:00 2001
From: Burak Emir <emir@epfl.ch>
Date: Wed, 29 Nov 2006 22:37:01 +0000
Subject: more functionality for -Xkilloption

---
 .../scala/tools/nsc/matching/CodeFactory.scala     |  6 ++++++
 .../scala/tools/nsc/transform/ExplicitOuter.scala  | 22 ++++++++++------------
 src/library/scala/Option.scala                     |  2 +-
 3 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/src/compiler/scala/tools/nsc/matching/CodeFactory.scala b/src/compiler/scala/tools/nsc/matching/CodeFactory.scala
index 56278738b4..afae88ee56 100644
--- a/src/compiler/scala/tools/nsc/matching/CodeFactory.scala
+++ b/src/compiler/scala/tools/nsc/matching/CodeFactory.scala
@@ -223,5 +223,11 @@ trait CodeFactory requires transform.ExplicitOuter  {
     typed {
       Apply(Select(tree, nme.ne), List(Literal(Constant(null))))
     }
+
+  def IsNull(tree:Tree) =
+    typed {
+      Apply(Select(tree, nme.eq), List(Literal(Constant(null))))
+    }
+
 }
 
diff --git a/src/compiler/scala/tools/nsc/transform/ExplicitOuter.scala b/src/compiler/scala/tools/nsc/transform/ExplicitOuter.scala
index 0538942fd0..f1fad915c0 100644
--- a/src/compiler/scala/tools/nsc/transform/ExplicitOuter.scala
+++ b/src/compiler/scala/tools/nsc/transform/ExplicitOuter.scala
@@ -353,30 +353,28 @@ abstract class ExplicitOuter extends InfoTransform with TransMatcher with Patter
         if settings.Xkilloption.value && wasNone(nne.tpe) =>
           atPos(tree.pos) { typer.typed { Literal(Constant(null)) }}
 
-        case Apply(Select(t, nme.isEmpty),List())       // t.isEmpty -> t ne null
+        case Apply(Select(t, nme.isEmpty),List())       // t.isEmpty -> t eq null
         if settings.Xkilloption.value && wasOption(t.tpe)  =>
-          NotNull(t)
+          IsNull(t)
 
         case Apply(Select(t, nme.get),List())           // t.get -> t if T <: Option[AnyRef]
         if settings.Xkilloption.value && wasOptionRef(t.tpe) =>
           t
 
-        case Select(t, n)
-        if settings.Xkilloption.value && {Console.println(t.tpe); wasOption(t.tpe)} && n != nme.get =>
+        case Select(t, n)           // methods ...
+        if settings.Xkilloption.value && wasOption(t.tpe) && n != nme.get =>
           def ntpe = if(t.tpe.isInstanceOf[SingleType]) t.tpe.widen else t.tpe
           val otpe = atPhase(phase.prev){ntpe}
           val nt = atPos(tree.pos) { typer.typed {
-            Select(If(NotNull(t),
-                      Apply(Select(New(TypeTree( definitions.someType(otpe.typeArgs(0)))), nme.CONSTRUCTOR), List(t)),
-                      gen.mkAttributedRef(definitions.NoneClass)),
-                   n)
+            If(NotNull(t),
+               Apply(Select(New(TypeTree( definitions.someType(otpe.typeArgs(0)))), nme.CONSTRUCTOR), List(t)),
+               gen.mkAttributedRef(definitions.NoneClass))
           }}
-          Console.println("nt == "+nt)
-          nt
-        case _                                   // e.g. this.blabla().x -> t
+	  copy.Select(tree,nt,n)
+
+        case _                                   // e.g. map.get("bar") -> fix type
         if settings.Xkilloption.value
         && wasOptionRef(tree.tpe) =>
-          Console.println("cuckoo" + tree)
           super.transform(tree.setType(atPhase(phase.prev){tree.tpe}.typeArgs(0)))
 
         // </removeOption>
diff --git a/src/library/scala/Option.scala b/src/library/scala/Option.scala
index cb92cbd39d..ee0e32e636 100644
--- a/src/library/scala/Option.scala
+++ b/src/library/scala/Option.scala
@@ -22,7 +22,7 @@ import Predef._
  *  @author  Matthias Zenger
  *  @version 1.0, 16/07/2003
  */
-sealed abstract class Option[+A] extends Iterable[A] {
+sealed abstract class Option[+A] extends Iterable[A] with Product {
 
   def isEmpty: Boolean = this match {
     case None => true
-- 
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