import Id
import Var
import Name
-import Outputable
import Class
+import Outputable
-debug = False
-dtrace s x = if debug then pprTrace "Vectoris.Type.PADict" s x else x
+-- debug = False
+-- dtrace s x = if debug then pprTrace "Vectoris.Type.PADict" s x else x
-- | Build the PA dictionary for some type and hoist it to top level.
-- The PA dictionary holds fns that convert values to and from their vectorised representations.
-> VM Var -- ^ name of the top-level dictionary function.
buildPADict vect_tc prepr_tc arr_tc repr
- = dtrace (text "buildPADict" <+> ppr vect_tc <+> ppr prepr_tc <+> ppr arr_tc)
- $ polyAbstract tvs $ \args@[] ->
- do
+ = polyAbstract tvs $ \args ->
+ case args of
+ (_:_) -> pprPanic "Vectorise.Type.PADict.buildPADict" (text "why do we need superclass dicts?")
+ [] -> do
-- TODO: I'm forcing args to [] because I'm not sure why we need them.
-- class PA has superclass (PR (PRepr a)) but we're not using
-- the superclass dictionary to build the PA dictionary.
$ mkConApp pa_dc
$ Type inst_ty : map (method_call args) method_ids
- dtrace (text "dict = " <+> ppr dict) $ return ()
-
-- Build the type of the dictionary function.
- pa_tc <- builtin paTyCon
- let pa_opitems = [(id, NoDefMeth) | id <- method_ids]
- let pa_cls = mkClass
- (tyConName pa_tc)
- tvs -- tyvars of class
- [] -- fundeps
- [] -- superclass predicates
- [] -- superclass dict selectors
- [] -- associated type families
- pa_opitems -- class op items
- pa_tc -- dictionary type constructor
-
- let dfun_ty = mkForAllTys tvs
- $ mkFunTys (map varType args) (PredTy $ ClassP pa_cls [inst_ty])
+ pa_tc <- builtin paTyCon
+ let Just pa_cls = tyConClass_maybe pa_tc
+
+ let dfun_ty = mkForAllTys tvs
+ $ mkFunTys (map varType args) (PredTy $ ClassP pa_cls [inst_ty])
-- Set the unfolding for the inliner.
raw_dfun <- newExportedVar dfun_name dfun_ty