💕 Adding assignment 3

a3/a3-handout/src/APL/AST.hs

@@ -0,0 +1,27 @@
+module APL.AST
+  ( VName,
+    Exp (..),
+  )
+where
+
+type VName = String
+
+data Exp
+  = CstInt Integer
+  | CstBool Bool
+  | Add Exp Exp
+  | Sub Exp Exp
+  | Mul Exp Exp
+  | Div Exp Exp
+  | Pow Exp Exp
+  | Eql Exp Exp
+  | If Exp Exp Exp
+  | Var VName
+  | Let VName Exp Exp
+  | Lambda VName Exp
+  | Apply Exp Exp
+  | TryCatch Exp Exp
+  | Print String Exp
+  | KvPut Exp Exp
+  | KvGet Exp
+  deriving (Eq, Show)