diff -r 2775062fd3a9 -r 2f4684e2ea95 doc-src/Codegen/Thy/examples/Codegen.hs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc-src/Codegen/Thy/examples/Codegen.hs	Tue Mar 03 11:00:51 2009 +0100
@@ -0,0 +1,23 @@
+module Codegen where {
+
+import qualified Nat;
+
+class Null a where {
+  nulla :: a;
+};
+
+heada :: forall a. (Codegen.Null a) => [a] -> a;
+heada (x : xs) = x;
+heada [] = Codegen.nulla;
+
+null_option :: forall a. Maybe a;
+null_option = Nothing;
+
+instance Codegen.Null (Maybe a) where {
+  nulla = Codegen.null_option;
+};
+
+dummy :: Maybe Nat.Nat;
+dummy = Codegen.heada [Just (Nat.Suc Nat.Zero_nat), Nothing];
+
+}