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Diffstat (limited to 'files/practicum/StdMaybeMonad.icl')
| -rw-r--r-- | files/practicum/StdMaybeMonad.icl | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/files/practicum/StdMaybeMonad.icl b/files/practicum/StdMaybeMonad.icl new file mode 100644 index 0000000..1c6277d --- /dev/null +++ b/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
|