Use => instead of -> for PolyTypes

If PolyTypes are to become value types we want to keep `=>` as the arrow
for consistency. `->` should be reserved for PolyTypes that do not have
side effects on instantiation.

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/pending/pos/polytypes.scala b/tests/pending/pos/polytypes.scala
new file mode 100644
index 000000000..ec6c89d10
--- /dev/null
+++ b/tests/pending/pos/polytypes.scala
@@ -0,0 +1,9 @@
+object Test {
+
+  type T = [+X] => (List[X] => List[X])
+
+  def reverse[X](xs: List[X]): List[X] = ???
+
+ // val x: T = reverse
+
+}