1 files changed, 21 insertions, 0 deletions
diff --git a/tests/datatypeP.ur b/tests/datatypeP.ur
new file mode 100644
index 00000000..171d8812
--- /dev/null
+++ b/tests/datatypeP.ur
@@ -0,0 +1,21 @@
+datatype option a = None | Some of a
+
+val none : option int = None
+val some_1 : option int = Some 1
+
+val f = fn t ::: Type => fn x : option t =>
+        case x of None => None | Some x => Some (Some x)
+
+val none_again = f none
+val some_1_again = f some_1
+
+val show = fn t ::: Type => fn x : option t => case x of None => "None" | Some _ => "Some"
+
+val page = fn x => <html><body>
+        {cdata (show x)}
+</body></html>
+
+val main : unit -> page = fn () => <html><body>
+        <li><a link={page none_again}>None</a></li>
+        <li><a link={page some_1_again}>Some 1</a></li>
+</body></html>