Two more tests

Unrelated to other commits but useful to get in.

Author: odersky

tests/pos/chan.scala

@@ -0,0 +1,20 @@
+trait Comparator {
+    type T     // abstract type member, to be filled in by concrete classes
+    def ordering: Ordering[T]
+    def compare(a: T, b: T): Int = ordering.compare(a, b)
+}
+
+object IntComparator extends Comparator {
+    type T = Int
+    def ordering: Ordering[Int] = Ordering.Int
+}
+object Test {
+  def process(c: Comparator)(items: Seq[c.T]): Int = {
+    c.compare(items(0), items(1))
+  }
+}
+class Processor[K](c: Comparator { type T = K }) {
+  def process(items: Seq[K]): Int = {
+    c.compare(items(0), items(1))
+  }
+}

tests/run/t7685-class-simple.scala

@@ -0,0 +1,10 @@
+object Test {
+  final class Foo(val x: String) extends AnyVal { override def toString = "" + x }
+  final class Bar(val f: Foo)    extends AnyVal { override def toString = "" + f }
+  def main(args: Array[String]) = {
+    val x = "abc"
+    val f = new Foo(x)
+    val b = new Bar(f)
+    assert(b.toString == "abc")
+  }
+}