Harden copmpareHkApply for ill-typed programs

Turn assertion into test. Without this, neg/tcpoly_overloaded.scala fails.

2 files changed, 39 insertions, 0 deletions

diff --git a/tests/pos/tcpoly_bounds1.scala b/tests/pos/tcpoly_bounds1.scala
new file mode 100644
index 000000000..9831e0b99
--- /dev/null
+++ b/tests/pos/tcpoly_bounds1.scala
@@ -0,0 +1,14 @@
+class Foo[t[x]<: Tuple2[Int, x]]
+
+//
+class MyPair[z](a: Int, b: z) extends Tuple2[Int, z](a,b)
+
+object foo extends Foo[MyPair]
+
+
+trait Monad[m[x <: Bound[x]], Bound[x], a] // TODO: variances!
+trait ListMonad[a] extends Monad[List, [X] -> Any, a] // Dotty difference: Any is not a legal argument for hk type.
+
+trait MyOrdered[a]
+trait MySet[x <: MyOrdered[x]]
+trait SetMonad[a <: MyOrdered[a]] extends Monad[MySet, MyOrdered, a]
diff --git a/tests/pos/tcpoly_overloaded.scala b/tests/pos/tcpoly_overloaded.scala
new file mode 100644
index 000000000..573eaadcb
--- /dev/null
+++ b/tests/pos/tcpoly_overloaded.scala
@@ -0,0 +1,25 @@
+trait Monad[T <: Bound[T], MyType[x <: Bound[x]], Bound[_]] {
+  def flatMap[S <: RBound[S], RContainer[x <: RBound[x]], RBound[_],
+              Result[x <: RBound[x]] <: Monad[x, RContainer, RBound]]
+              (f: T => Result[S]): Result[S]
+  def flatMap[S <: RBound[S], RContainer[x <: RBound[x]], RBound[_],
+              Result[x <: RBound[x]] <: Monad[x, RContainer, RBound]]
+              (f: T => Result[S], foo: String): Result[S]
+  def flatMap[S <: Bound[S]]
+              (f: T => MyType[S], foo: Int): MyType[S]
+}
+
+trait Test {
+  def moo: MList[Int]
+  class MList[T](el: T) extends Monad[T, List, [X] -> Any] {
+    def flatMap[S <: RBound[S], RContainer[x <: RBound[x]], RBound[_],
+            Result[x <: RBound[x]] <: Monad[x, RContainer, RBound]]
+            (f: T => Result[S]): Result[S] = sys.error("foo")
+    def flatMap[S <: RBound[S], RContainer[x <: RBound[x]], RBound[_],
+            Result[x <: RBound[x]] <: Monad[x, RContainer, RBound]]
+            (f: T => Result[S], foo: String): Result[S]  = sys.error("foo")
+    def flatMap[S]
+            (f: T => List[S], foo: Int): List[S]  = sys.error("foo")
+  }
+  val l: MList[String] = moo.flatMap[String, List, [X] -> Any, MList]((x: Int) => new MList("String"))
+}