import TypeRep
import Coercion
import FamInstEnv ( FamInst, mkLocalFamInst )
-import InstEnv ( Instance )
+import InstEnv ( Instance, mkLocalInstance, instanceDFunId )
import OccName
import MkId
-import BasicTypes ( StrictnessMark(..), boolToRecFlag )
+import BasicTypes ( StrictnessMark(..), OverlapFlag(..), boolToRecFlag )
import Var ( Var )
import Id ( mkWildId )
-import Name ( Name )
+import Name ( Name, getOccName )
import NameEnv
import TysWiredIn ( intTy, intDataCon )
import TysPrim ( intPrimTy )
type TyConGroup = ([TyCon], UniqSet TyCon)
+data PAInstance = PAInstance {
+ painstInstance :: Instance
+ , painstVectTyCon :: TyCon
+ , painstArrTyCon :: TyCon
+ }
+
vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [Instance])
vectTypeEnv env
= do
types = [ty | dc <- tyConDataCons vect_tc
, ty <- dataConRepArgTys dc]
-buildPADict :: Var -> TyCon -> TyCon -> VM [(Var, CoreExpr)]
-buildPADict var vect_tc arr_tc
+mkPAInstance :: TyCon -> TyCon -> VM PAInstance
+mkPAInstance vect_tc arr_tc
+ = do
+ pa <- builtin paClass
+ let inst_ty = mkForAllTys tvs
+ . (mkFunTys $ mkPredTys [ClassP pa [ty] | ty <- arg_tys])
+ $ mkPredTy (ClassP pa [mkTyConApp vect_tc arg_tys])
+
+ dfun <- newExportedVar (mkPADFunOcc $ getOccName vect_tc) inst_ty
+
+ return $ PAInstance {
+ painstInstance = mkLocalInstance dfun NoOverlap
+ , painstVectTyCon = vect_tc
+ , painstArrTyCon = arr_tc
+ }
+ where
+ tvs = tyConTyVars arr_tc
+ arg_tys = mkTyVarTys tvs
+
+buildPADict :: PAInstance -> VM [(Var, CoreExpr)]
+buildPADict (PAInstance {
+ painstInstance = inst
+ , painstVectTyCon = vect_tc
+ , painstArrTyCon = arr_tc })
= localV . abstractOverTyVars (tyConTyVars arr_tc) $ \abstract ->
do
meth_binds <- mapM (mk_method abstract) paMethods
pa_dc <- builtin paDictDataCon
let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
- return $ (var, dict) : meth_binds
+ return $ (instanceDFunId inst, dict) : meth_binds
where
tvs = tyConTyVars arr_tc
arg_tys = mkTyVarTys tvs