Adds samples for the clean programming language

samples/Clean/stack.icl

@@ -0,0 +1,33 @@
+implementation module stack
+import StdEnv
+
+:: Stack a :== [a]
+
+newStack :: (Stack a)
+newStack = []
+
+push :: a (Stack a) -> Stack a
+push x s = [x:s]
+
+pushes :: [a] (Stack a) -> Stack a
+pushes x s = x ++ s
+
+pop :: (Stack a) -> Stack a
+pop [] = abort "Cannot use pop on an empty stack"
+pop [e:s] = s
+
+popn :: Int (Stack a) -> Stack a
+popn n s  = drop n s
+
+top :: (Stack a) -> a
+top [] = abort "Cannot use top on an empty stack"
+top [e:s] = e
+
+topn :: Int (Stack a) -> [a]
+topn n s = take n s
+elements :: (Stack a) -> [a]
+elements s = s
+
+count :: (Stack a) -> Int
+count s = length s
+