Fix issue with anyHash in ScalaRuntime

Author: felixmulder

compiler/src/dotty/tools/dotc/core/StdNames.scala

@@ -325,12 +325,15 @@ object StdNames {
     val ArrayAnnotArg: N        = "ArrayAnnotArg"
     val Constant: N             = "Constant"
     val ConstantType: N         = "ConstantType"
+    val doubleHash: N           = "doubleHash"
     val ExistentialTypeTree: N  = "ExistentialTypeTree"
     val Flag : N                = "Flag"
+    val floatHash: N            = "floatHash"
     val Ident: N                = "Ident"
     val Import: N               = "Import"
     val Literal: N              = "Literal"
     val LiteralAnnotArg: N      = "LiteralAnnotArg"
+    val longHash: N             = "longHash"
     val Modifiers: N            = "Modifiers"
     val NestedAnnotArg: N       = "NestedAnnotArg"
     val NoFlags: N              = "NoFlags"
@@ -353,6 +356,7 @@ object StdNames {
     val UNIT : N                = "UNIT"
     val add_ : N                = "add"
     val annotation: N           = "annotation"
+    val anyHash: N              = "anyHash"
     val anyValClass: N          = "anyValClass"
     val append: N               = "append"
     val apply: N                = "apply"

compiler/src/dotty/tools/dotc/transform/InterceptedMethods.scala

@@ -21,7 +21,7 @@ import dotty.tools.dotc.ast.Trees._
 import dotty.tools.dotc.ast.{untpd, tpd}
 import dotty.tools.dotc.core.Constants.Constant
 import dotty.tools.dotc.core.Types.MethodType
-import dotty.tools.dotc.core.Names.Name
+import dotty.tools.dotc.core.Names.{ Name, TermName }
 import scala.collection.mutable.ListBuffer
 import dotty.tools.dotc.core.Denotations.SingleDenotation
 import dotty.tools.dotc.core.SymDenotations.SymDenotation
@@ -64,30 +64,18 @@ class InterceptedMethods extends MiniPhaseTransform {
     else tree
   }
 
+  // TODO: add missing cases from scalac
   private def poundPoundValue(tree: Tree)(implicit ctx: Context) = {
     val s = tree.tpe.widen.typeSymbol
-    if (s == defn.NullClass) Literal(Constant(0))
-    else {
-      // Since we are past typer, we need to avoid creating trees carrying
-      // overloaded types.  This logic is custom (and technically incomplete,
-      // although serviceable) for def hash.  What is really needed is for
-      // the overloading logic presently hidden away in a few different
-      // places to be properly exposed so we can just call "resolveOverload"
-      // after typer.  Until then:
-
-      def alts = defn.ScalaRuntimeModule.info.member(nme.hash_)
-
-      // if tpe is a primitive value type, alt1 will match on the exact value,
-      // taking in account that null.asInstanceOf[Int] == 0
-      def alt1 = alts.suchThat(_.info.firstParamTypes.head =:= tree.tpe.widen)
 
-      // otherwise alt2 will match. alt2 also knows how to handle 'null' runtime value
-      def alt2 = defn.ScalaRuntimeModule.info.member(nme.hash_)
-        .suchThat(_.info.firstParamTypes.head.typeSymbol == defn.AnyClass)
+    def staticsCall(methodName: TermName): Tree =
+      ref(defn.staticsMethodRef(methodName)).appliedTo(tree)
 
-      Ident((if (s.isNumericValueClass) alt1 else alt2).termRef)
-        .appliedTo(tree)
-    }
+    if (s == defn.NullClass) Literal(Constant(0))
+    else if (s == defn.DoubleClass) staticsCall(nme.doubleHash)
+    else if (s == defn.LongClass) staticsCall(nme.longHash)
+    else if (s == defn.FloatClass) staticsCall(nme.floatHash)
+    else staticsCall(nme.anyHash)
   }
 
   override def transformApply(tree: Apply)(implicit ctx: Context, info: TransformerInfo): Tree = {

project/Build.scala

@@ -469,7 +469,7 @@ object Build {
 
       // get libraries onboard
       libraryDependencies ++= Seq("com.typesafe.sbt" % "sbt-interface" % sbtVersion.value,
-                                  ("org.scala-lang.modules" % "scala-xml_2.12" % "1.0.6").withDottyCompat(),
+                                  ("org.scala-lang.modules" %% "scala-xml" % "1.0.6").withDottyCompat(),
                                   "com.novocode" % "junit-interface" % "0.11" % "test",
                                   "org.scala-lang" % "scala-library" % scalacVersion % "test"),
 

sbt-dotty/src/dotty/tools/sbtplugin/DottyPlugin.scala

@@ -51,6 +51,8 @@ object DottyPlugin extends AutoPlugin {
         moduleID.crossVersion match {
           case _: CrossVersion.Binary =>
             moduleID.cross(CrossVersion.binaryMapped {
+              // TODO: this will break on release of >= 0.4
+              case version if version.startsWith("0.3") => "2.12"
               case version if version.startsWith("0.") => "2.11"
               case version => version
             })