X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=test.icl;h=822f41d96f79c20b12a4020c848454a937724434;hb=7db58a8b1702130a00cce2a957730e96cf477b77;hp=99d51e1095778953763868603a157e2151b0cacc;hpb=a2fc52f1df76c7d115cbd2f781892824b15b0d1e;p=clean-tests.git

diff --git a/test.icl b/test.icl
index 99d51e1..822f41d 100644
--- a/test.icl
+++ b/test.icl
@@ -1,9 +1,38 @@
 module test
 
-import iTasks
-import iTasks.Extensions.DateTime
+import StdEnv
+import Data.Maybe
+import Data.Functor
+import Control.Monad
+import Control.Applicative
 
-Start w = doTasks (onStartup t) w
+class expr v where
+	lit :: i -> v i | toString i
+	(+.) infixl 6 :: (v i) (v i) -> v i | + i
 
-t :: Task Int
-t = throw "bork"
+instance + (v a) | expr v & + a where
+	+ l r = l +. r
+
+eval :: (Maybe a) -> Maybe a
+eval x = x
+instance expr Maybe where
+	lit i = Just i
+	+. x y = (+) <$> x <*> y
+
+:: Print a =: Print String
+print :: (Print a) -> String
+print (Print a) = a
+instance expr Print where
+	lit i = Print (toString i)
+	+. (Print l) (Print r) = Print (l +++ "+" +++ r)
+
+printEval :: (A.v: v a | expr v) -> (Maybe a, String)
+//printEval f = (f, let (Print p) = f in p)
+printEval f = (eval f, print f)
+
+//Mag niet
+//Start :: (Maybe Int, String)
+//Start = printEval (lit 4 + lit 38)
+
+//Mag wel
+Start = let (Print f) = lit 4 + lit 38 in f