Merge pull request scala#5300 from milessabin/topic/si-4914

SI-4914 Addition of tests resolves as fixed

Author: adriaanm

test/files/pos/t482.scala

@@ -0,0 +1,7 @@
+object Test {
+  class Foo { val z = "foo"; val y : z.type = z }
+
+  val x : ({ val y : z.type } forSome { val z : String }) = new Foo
+
+  val x2 : ({ val y : T } forSome { type T <: String with Singleton }) = new Foo
+}

test/files/pos/t4914.scala

@@ -0,0 +1,20 @@
+trait Type {
+  type S
+}
+
+class ConcreteType extends Type {
+  type S = Double
+}
+
+trait Base {
+  type T <: Type
+  val m: Map[t#S, t#S] forSome { type t <: T with Singleton }
+  val n: Map[x.type#S, x.type#S] forSome { val x: T }
+}
+
+abstract class Derived extends Base {
+  override type T = ConcreteType
+  override val m = Map[Double, Double]()
+  /** This does not work. §3.2.10 indicates that types n is shorthand for type of m. */
+  override val n = Map[Double, Double]()
+}