diff options
Diffstat (limited to 'fp2/week2/mart/oldold/old/StdMaybeMonad.dcl')
| -rw-r--r-- | fp2/week2/mart/oldold/old/StdMaybeMonad.dcl | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fp2/week2/mart/oldold/old/StdMaybeMonad.dcl b/fp2/week2/mart/oldold/old/StdMaybeMonad.dcl new file mode 100644 index 0000000..e9ebec1 --- /dev/null +++ b/fp2/week2/mart/oldold/old/StdMaybeMonad.dcl @@ -0,0 +1,9 @@ +definition module StdMaybeMonad
+
+import StdMonad
+
+:: Maybe a = Nothing | Just a
+
+instance return Maybe
+instance >>= Maybe
+instance fail Maybe
|