From 01c99aa384b42e3d19bb7e8e0f7b85ea9102e199 Mon Sep 17 00:00:00 2001
From: Martin Odersky <odersky@gmail.com>
Date: Wed, 26 Dec 2012 10:13:03 +0100
Subject: Added isStatic check to asSeenFrom

---
 src/dotty/tools/dotc/core/Types.scala | 31 +++++++++++++------------------
 1 file changed, 13 insertions(+), 18 deletions(-)

(limited to 'src/dotty/tools/dotc/core')

diff --git a/src/dotty/tools/dotc/core/Types.scala b/src/dotty/tools/dotc/core/Types.scala
index 92c0fe78a..591c7dddd 100644
--- a/src/dotty/tools/dotc/core/Types.scala
+++ b/src/dotty/tools/dotc/core/Types.scala
@@ -158,8 +158,6 @@ object Types {
 
     def prefix: Type = ???
 
-    def isTrivial: Boolean = ???
-
     def resultType: Type = ???
 
     def baseClasses(implicit ctx: Context): List[ClassSymbol] =
@@ -170,19 +168,17 @@ object Types {
     def isCachable: Boolean = false
 
     def asSeenFrom(pre: Type, clazz: Symbol)(implicit ctx: Context): Type =
-      if (isTrivial ||
-          ctx.erasedTypes && clazz != defn.ArrayClass ||
-          clazz.isStaticMono) this
+      if (clazz.isStaticMono || ctx.erasedTypes && clazz != defn.ArrayClass ) this
       else asSeenFrom(pre, clazz, null)
 
-    def asSeenFrom(pre: Type, clazz: Symbol, map: AsSeenFromMap)(implicit ctx: Context): Type = {
+    def asSeenFrom(pre: Type, clazz: Symbol, theMap: AsSeenFromMap)(implicit ctx: Context): Type = {
 
       def skipPrefixOf(pre: Type, clazz: Symbol) =
         (pre eq NoType) || (pre eq NoPrefix) || clazz.isPackageClass
 
-      def toPrefix(pre: Type, clazz: Symbol, thisclazz: ClassSymbol, tp: Type): Type =
+      def toPrefix(pre: Type, clazz: Symbol, thisclazz: ClassSymbol): Type =
         if (skipPrefixOf(pre, clazz))
-          tp
+          this
         else if ((thisclazz isNonBottomSubClass clazz) &&
           (pre.widen.typeSymbol isNonBottomSubClass thisclazz))
           pre match {
@@ -190,10 +186,10 @@ object Types {
             case _ => pre
           }
         else
-          toPrefix(pre.baseType(clazz).prefix, clazz.owner, thisclazz, tp)
+          toPrefix(pre.baseType(clazz).prefix, clazz.owner, thisclazz)
 
-      def toInstance(pre: Type, clazz: Symbol, tparam: Symbol, tp: Type): Type = {
-        if (skipPrefixOf(pre, clazz)) tp
+      def toInstance(pre: Type, clazz: Symbol, tparam: Symbol): Type = {
+        if (skipPrefixOf(pre, clazz)) this
         else {
           val tparamOwner = tparam.owner
 
@@ -224,21 +220,20 @@ object Types {
             else throwError
 
           if (tparamOwner == clazz && prefixMatches) instParamFrom(basePre)
-          else toInstance(basePre.prefix, clazz.owner, tparam, tp)
+          else toInstance(basePre.prefix, clazz.owner, tparam)
         }
       }
 
       this match {
         case tp: NamedType =>
           val sym = tp.symbol
-          if (tp.symbol.isTypeParameter)
-            toInstance(pre, clazz, sym, this)
-          else
-            tp.derivedNamedType(tp.prefix.asSeenFrom(pre, clazz), tp.name)
+          if (tp.symbol.isTypeParameter) toInstance(pre, clazz, sym)
+          else if (sym.isStatic) this
+          else tp.derivedNamedType(tp.prefix.asSeenFrom(pre, clazz, theMap), tp.name)
         case ThisType(thisclazz) =>
-          toPrefix(pre, clazz, thisclazz, this)
+          toPrefix(pre, clazz, thisclazz)
         case _ =>
-          val asSeenFromMap = if (map != null) map else new AsSeenFromMap(pre, clazz)
+          val asSeenFromMap = if (theMap != null) theMap else new AsSeenFromMap(pre, clazz)
           this match {
             case tp: AppliedType =>
               tp.derivedAppliedType(
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