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module CC.AST.Typed(
module CC.AST.Typed,
module CC.Types
) where
import Data.List
import CC.Pretty
import CC.Types
data ProgramT = ProgramT [DefT]
deriving (Show, Read)
data DefT = DefT Name ExprT
deriving (Show, Read)
data TypeT = TFunT TypeT TypeT
| TIntT
| TTupT [TypeT]
| TyVar Int
deriving (Show, Read)
data TypeSchemeT = TypeSchemeT [Int] TypeT
deriving (Show, Read)
data ExprT = LamT TypeT Occ ExprT
| CallT TypeT ExprT ExprT
| IntT Int
| TupT [ExprT]
| VarT Occ
deriving (Show, Read)
data Occ = Occ Name TypeT
deriving (Show, Read)
exprType :: ExprT -> TypeT
exprType (LamT typ _ _) = typ
exprType (CallT typ _ _) = typ
exprType (IntT _) = TIntT
exprType (TupT es) = TTupT (map exprType es)
exprType (VarT (Occ _ typ)) = typ
instance Pretty TypeT where
prettyPrec _ TIntT = "Int"
prettyPrec p (TFunT a b) =
precParens p 2 (prettyPrec 3 a ++ " -> " ++ prettyPrec 2 b)
prettyPrec _ (TTupT ts) =
"(" ++ intercalate ", " (map pretty ts) ++ ")"
prettyPrec _ (TyVar i) = 't' : show i
instance Pretty TypeSchemeT where
prettyPrec p (TypeSchemeT bnds ty) =
precParens p 2
("forall " ++ intercalate " " (map (pretty . TyVar) bnds) ++ ". " ++
prettyPrec 2 ty)
instance Pretty ExprT where
prettyPrec p (LamT ty (Occ n t) e) =
precParens p 2 $
"(\\(" ++ n ++ " :: " ++ pretty t ++ ") -> "
++ prettyPrec 2 e ++ ") :: " ++ pretty ty
prettyPrec p (CallT ty e1 e2) =
precParens p 2 $
prettyPrec 3 e1 ++ " " ++ prettyPrec 3 e2 ++ " :: " ++ pretty ty
prettyPrec _ (IntT i) = show i
prettyPrec _ (TupT es) = "(" ++ intercalate ", " (map pretty es) ++ ")"
prettyPrec p (VarT (Occ n t)) =
precParens p 2 $
show n ++ " :: " ++ pretty t
instance Pretty DefT where
pretty (DefT n e) = n ++ " = " ++ pretty e
instance Pretty ProgramT where
pretty (ProgramT defs) = concatMap ((++ "\n") . pretty) defs
|
