diff options
| author | Camil Staps | 2016-02-02 19:24:50 +0100 |
|---|---|---|
| committer | Camil Staps | 2016-02-02 19:24:50 +0100 |
| commit | a7d7542dc646a5fd124ef71e71ce260889f1701b (patch) | |
| tree | 04ed89503bbb3cc9933273a1326a53ca724c3492 /1415/files/practicum/StdMaybeMonad.icl | |
| parent | week6 camil: working positioning of lines by putting empties at left and righ... (diff) | |
Diffstat (limited to '1415/files/practicum/StdMaybeMonad.icl')
| -rw-r--r-- | 1415/files/practicum/StdMaybeMonad.icl | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/1415/files/practicum/StdMaybeMonad.icl b/1415/files/practicum/StdMaybeMonad.icl new file mode 100644 index 0000000..1c6277d --- /dev/null +++ b/1415/files/practicum/StdMaybeMonad.icl @@ -0,0 +1,10 @@ +implementation module StdMaybeMonad
+
+import StdMonad
+
+:: Maybe a = Nothing | Just a
+
+instance return Maybe where return x = Just x
+instance >>= Maybe where >>= (Just x) f = f x
+ >>= Nothing f = Nothing
+instance fail Maybe where fail = Nothing
|