import CoreUnfold
import TyCon
import Type
+import TypeRep
import Id
import Var
import Name
+import Class
+import Outputable
+-- 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
- = 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.
+
+ -- Get ids for each of the methods in the dictionary.
method_ids <- mapM (method args) paMethods
- pa_tc <- builtin paTyCon
+ -- Expression to build the dictionary.
pa_dc <- builtin paDataCon
let dict = mkLams (tvs ++ args)
$ mkConApp pa_dc
$ Type inst_ty : map (method_call args) method_ids
- dfun_ty = mkForAllTys tvs
- $ mkFunTys (map varType args) (mkTyConApp pa_tc [inst_ty])
+ -- Build the type of the dictionary function.
+ 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