diff options
Diffstat (limited to 'files/practicum/StdBool2.dcl')
| -rw-r--r-- | files/practicum/StdBool2.dcl | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/files/practicum/StdBool2.dcl b/files/practicum/StdBool2.dcl new file mode 100644 index 0000000..66172cc --- /dev/null +++ b/files/practicum/StdBool2.dcl @@ -0,0 +1,15 @@ +definition module StdBool2
+
+import StdBool
+
+class ~~ a :: !a -> a
+class (|||) infixr 2 a :: !a !a -> a
+class (&&&) infixr 3 a :: !a !a -> a
+
+instance ~~ Bool
+instance ||| Bool
+instance &&& Bool
+
+instance ~~ (a -> Bool)
+instance ||| (a -> Bool)
+instance &&& (a -> Bool)
|