1 files changed, 52 insertions, 0 deletions
diff --git a/src/Haskell/AST.hs b/src/Haskell/AST.hs
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index 0000000..8326440
--- /dev/null
+++ b/src/Haskell/AST.hs
@@ -0,0 +1,52 @@
+module Haskell.AST where
+
+
+type Name = String
+type TyVar = String
+
+data AST = AST [Toplevel]
+  deriving (Show)
+
+data Toplevel = TopDef Def
+              | TopDecl Decl
+              | TopData Data
+              | TopClass Class
+              | TopInst Inst
+  deriving (Show)
+
+data Def = Def Name Expr
+  deriving (Show)
+
+data Expr = App Expr [Expr]
+          | Ref Name
+          | LitNum Integer
+          | Tup [Expr]
+          | Lam [Name] Expr
+          | Case Name [(Pat, Expr)]
+  deriving (Show)
+
+data Pat = PatAny
+         | PatVar Name
+         | PatCon Name [Pat]
+         | PatTup [Pat]
+  deriving (Show)
+
+data Decl = Decl Name Type
+  deriving (Show)
+
+data Type = TyTup [Type]
+          | TyInt
+          | TyFun Type Type
+          | TyRef Name [Type]
+          | TyVar Name
+          | TyVoid
+  deriving (Show)
+
+data Data = Data Name [TyVar] [(Name, [Type])]
+  deriving (Show)
+
+data Class = Class Name [TyVar] [Decl]
+  deriving (Show)
+
+data Inst = Inst Name Type [Def]
+  deriving (Show)