From 21fbde04b42a63f53d4839221f1fea90f329a72d Mon Sep 17 00:00:00 2001
From: Martin Odersky <odersky@gmail.com>
Date: Sun, 24 Jan 2010 15:05:46 +0000
Subject: renamed notCompiles ==> canRedefine.

---
 src/compiler/scala/tools/nsc/Global.scala          |  9 +++----
 .../scala/tools/nsc/interactive/Global.scala       | 29 ++++++++++++++--------
 .../scala/tools/nsc/typechecker/Namers.scala       |  6 ++---
 3 files changed, 25 insertions(+), 19 deletions(-)

diff --git a/src/compiler/scala/tools/nsc/Global.scala b/src/compiler/scala/tools/nsc/Global.scala
index 1fc6098c3f..3cde4698ff 100644
--- a/src/compiler/scala/tools/nsc/Global.scala
+++ b/src/compiler/scala/tools/nsc/Global.scala
@@ -726,12 +726,11 @@ class Global(var settings: Settings, var reporter: Reporter) extends SymbolTable
       else if (sym.isModuleClass) compiles(sym.sourceModule)
       else false
 
-    /** Opposite of compiles, but is overridden in interactive
-     *  notCompiles is used to detect double declarations in multiple source files.
-     *  Since the IDE rechecks units several times in the same run, it should
-     *  always return true there.
+    /** Is this run allowed to redefine the given symbol? Usually this is true
+     *  if the run does not already compile `sym`, but for interactive mode
+     *  we have a more liberal interpretation.
      */
-    def notCompiles(sym: Symbol) = !compiles(sym)
+    def canRedefine(sym: Symbol) = !compiles(sym)
 
     // --------------- Compilation methods ----------------------------
 
diff --git a/src/compiler/scala/tools/nsc/interactive/Global.scala b/src/compiler/scala/tools/nsc/interactive/Global.scala
index 9ed8b5076e..706d578555 100644
--- a/src/compiler/scala/tools/nsc/interactive/Global.scala
+++ b/src/compiler/scala/tools/nsc/interactive/Global.scala
@@ -398,18 +398,24 @@ self =>
   }
 
   def typeMembers(pos: Position): List[TypeMember] = {
-    val tree1 = typedTreeAt(pos)
-    val tree0 = tree1 match {
-      case tt : TypeTree => tt.original
-      case t => t
+    var tree = typedTreeAt(pos)
+    tree match {
+      case tt : TypeTree => tree = tt.original
+      case _ =>
     }
-    val tree = tree0 match {
-      case s@Select(qual, name) if s.tpe == ErrorType => qual
-      case t => t
+
+    tree match {
+      case Select(qual, name) if tree.tpe == ErrorType => tree = qual
+      case _ =>
     }
 
-    println("typeMembers at "+tree+" "+tree.tpe)
     val context = doLocateContext(pos)
+
+    if (tree.tpe == null)
+      tree = analyzer.newTyper(context).typedQualifier(tree)
+
+    println("typeMembers at "+tree+" "+tree.tpe)
+
     val superAccess = tree.isInstanceOf[Super]
     val scope = new Scope
     val members = new LinkedHashMap[Symbol, TypeMember]
@@ -449,7 +455,8 @@ self =>
         addTypeMember(sym, vpre, false, view.tree.symbol)
       }
     }
-    members.valuesIterator.toList
+    //util.trace("typeMembers =")(
+    members.valuesIterator.toList)
   }
 
   // ---------------- Helper classes ---------------------------
@@ -467,11 +474,11 @@ self =>
   class TyperRun extends Run {
     // units is always empty
 
-    /** notCompiles is used to detect double declarations in multiple source files.
+    /** canRedefine is used to detect double declarations in multiple source files.
      *  Since the IDE rechecks units several times in the same run, these tests
      *  are disabled by always returning true here.
      */
-    override def notCompiles(sym: Symbol) = true
+    override def canRedefine(sym: Symbol) = true
 
     def typeCheck(unit: CompilationUnit): Unit = {
       applyPhase(typerPhase, unit)
diff --git a/src/compiler/scala/tools/nsc/typechecker/Namers.scala b/src/compiler/scala/tools/nsc/typechecker/Namers.scala
index 71d325d2c5..c755beb04e 100644
--- a/src/compiler/scala/tools/nsc/typechecker/Namers.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/Namers.scala
@@ -197,7 +197,7 @@ trait Namers { self: Analyzer =>
 
     def enterClassSymbol(tree : ClassDef): Symbol = {
       var c: Symbol = context.scope.lookup(tree.name)
-      if (c.isType && c.owner.isPackageClass && context.scope == c.owner.info.decls && currentRun.notCompiles(c)) {
+      if (c.isType && c.owner.isPackageClass && context.scope == c.owner.info.decls && currentRun.canRedefine(c)) {
         updatePosFlags(c, tree.pos, tree.mods.flags)
         setPrivateWithin(tree, c, tree.mods)
       } else {
@@ -214,7 +214,7 @@ trait Namers { self: Analyzer =>
         }
         clazz.sourceFile = file
         if (clazz.sourceFile ne null) {
-          assert(currentRun.notCompiles(clazz) || clazz.sourceFile == currentRun.symSource(c));
+          assert(currentRun.canRedefine(clazz) || clazz.sourceFile == currentRun.symSource(c));
           currentRun.symSource(c) = clazz.sourceFile
         }
       }
@@ -229,7 +229,7 @@ trait Namers { self: Analyzer =>
       var m: Symbol = context.scope.lookup(tree.name)
       val moduleFlags = tree.mods.flags | MODULE | FINAL
       if (m.isModule && !m.isPackage && inCurrentScope(m) &&
-          (currentRun.notCompiles(m) || (m hasFlag SYNTHETIC))) {
+          (currentRun.canRedefine(m) || (m hasFlag SYNTHETIC))) {
         updatePosFlags(m, tree.pos, moduleFlags)
         setPrivateWithin(tree, m, tree.mods)
         context.unit.synthetics -= m
-- 
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