buildToPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
buildToPRepr (TyConRepr {
- repr_tys = repr_tys
- , repr_prod_tycons = prod_tycons
- , repr_prod_tys = prod_tys
- , repr_sum_tycon = repr_sum_tycon
- , repr_type = repr_type
+ repr_tys = repr_tys
+ , repr_prod_data_cons = prod_data_cons
+ , repr_prod_tys = prod_tys
+ , repr_sum_data_cons = sum_data_cons
+ , repr_type = repr_type
})
vect_tc prepr_tc _
= do
. wrapFamInstBody prepr_tc var_tys
. Case (Var arg) (mkWildId arg_ty) repr_type
. mk_alts data_cons vars
- . zipWith3 mk_prod prod_tycons repr_tys $ map (map Var) vars
+ . zipWith3 mk_prod prod_data_cons repr_tys $ map (map Var) vars
where
var_tys = mkTyVarTys $ tyConTyVars vect_tc
arg_ty = mkTyConApp vect_tc var_tys
data_cons = tyConDataCons vect_tc
- Just sum_tycon = repr_sum_tycon
- sum_data_cons = tyConDataCons sum_tycon
-
mk_alts _ _ [] = [(DEFAULT, [], Var unitDataConId)]
mk_alts [dc] [vars] [expr] = [(DataAlt dc, vars, expr)]
mk_alts dcs vars exprs = zipWith4 mk_alt dcs vars sum_data_cons exprs
mk_prod _ _ [] = Var unitDataConId
mk_prod _ _ [expr] = expr
- mk_prod (Just tc) tys exprs = mkConApp dc (map Type tys ++ exprs)
- where
- [dc] = tyConDataCons tc
+ mk_prod (Just dc) tys exprs = mkConApp dc (map Type tys ++ exprs)
buildFromPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
buildFromPRepr (TyConRepr {
- repr_tys = repr_tys
- , repr_prod_tycons = prod_tycons
- , repr_prod_tys = prod_tys
- , repr_sum_tycon = repr_sum_tycon
- , repr_type = repr_type
+ repr_tys = repr_tys
+ , repr_prod_data_cons = prod_data_cons
+ , repr_prod_tys = prod_tys
+ , repr_sum_data_cons = sum_data_cons
+ , repr_type = repr_type
})
vect_tc prepr_tc _
= do
liftM (Lam arg
. un_sum (unwrapFamInstScrut prepr_tc var_tys (Var arg)))
- (sequence $ zipWith4 un_prod data_cons prod_tycons prod_tys repr_tys)
+ (sequence
+ $ zipWith4 un_prod data_cons prod_data_cons prod_tys repr_tys)
where
var_tys = mkTyVarTys $ tyConTyVars vect_tc
ty_args = map Type var_tys
res_ty = mkTyConApp vect_tc var_tys
data_cons = tyConDataCons vect_tc
- Just sum_tc = repr_sum_tycon
- sum_data_cons = tyConDataCons sum_tc
-
un_prod dc _ _ []
= do
var <- newLocalVar FSLIT("u") unitTy
var <- newLocalVar FSLIT("x") ty
return (var, mkConApp dc (ty_args ++ [Var var]))
- un_prod dc (Just prod_tc) prod_ty tys
+ un_prod dc (Just prod_dc) prod_ty tys
= do
vars <- mapM (newLocalVar FSLIT("x")) tys
pv <- newLocalVar FSLIT("p") prod_ty
[(DataAlt prod_dc, vars, res)]
return (pv, expr)
- where
- [prod_dc] = tyConDataCons prod_tc
-
un_sum scrut [(var, expr)] = Let (NonRec var scrut) expr
un_sum scrut alts
import Outputable
import FastString
+import Maybes ( orElse )
import Data.List ( zipWith4 )
import Control.Monad ( liftM, liftM2, zipWithM_ )
mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
data TyConRepr = TyConRepr {
- repr_tyvars :: [TyVar]
- , repr_tys :: [[Type]]
-
- , repr_prod_tycons :: [Maybe TyCon]
- , repr_prod_tys :: [Type]
- , repr_sum_tycon :: Maybe TyCon
- , repr_type :: Type
+ repr_tyvars :: [TyVar]
+ , repr_tys :: [[Type]]
+
+ , repr_prod_tycons :: [Maybe TyCon]
+ , repr_prod_data_cons :: [Maybe DataCon]
+ , repr_prod_tys :: [Type]
+ , repr_sum_tycon :: Maybe TyCon
+ , repr_sum_data_cons :: [DataCon]
+ , repr_type :: Type
}
mkTyConRepr :: TyCon -> VM TyConRepr
sum_tycon <- mk_tycon sumTyCon prod_tys
return $ TyConRepr {
- repr_tyvars = tyvars
- , repr_tys = rep_tys
-
- , repr_prod_tycons = prod_tycons
- , repr_prod_tys = prod_tys
- , repr_sum_tycon = sum_tycon
- , repr_type = mk_tc_app_maybe sum_tycon prod_tys
+ repr_tyvars = tyvars
+ , repr_tys = rep_tys
+
+ , repr_prod_tycons = prod_tycons
+ , repr_prod_data_cons = map (fmap mk_single_datacon) prod_tycons
+ , repr_prod_tys = prod_tys
+ , repr_sum_tycon = sum_tycon
+ , repr_sum_data_cons = fmap tyConDataCons sum_tycon `orElse` []
+ , repr_type = mk_tc_app_maybe sum_tycon prod_tys
}
where
tyvars = tyConTyVars vect_tc
| otherwise = return Nothing
where n = length tys
+ mk_single_datacon tc | [dc] <- tyConDataCons tc = dc
+
mk_tc_app_maybe Nothing [] = unitTy
mk_tc_app_maybe Nothing [ty] = ty
mk_tc_app_maybe (Just tc) tys = mkTyConApp tc tys