--Standard modules
import qualified Maybe
+import qualified List
import qualified System.IO.Unsafe
import qualified Data.Map as Map
import qualified Data.Accessor.Monad.Trans.State as MonadState
import qualified Literal
import qualified MkCore
import qualified VarEnv
+import qualified Outputable
-- Local imports
import CLasH.Translator.TranslatorTypes
Nothing -> error $ "\nCoreTools.tfvec_len: Not a vector type: " ++ (pprString ty)
[len, el_ty] = args
+-- | Gets the index of the given datacon in the given typed thing.
+-- Errors out if it does not occur or if the type is not an ADT.
+datacon_index :: TypedThing t => t -> DataCon.DataCon -> Int
+datacon_index tt dc = case List.elemIndex dc dcs of
+ Nothing -> error $ "Datacon " ++ pprString dc ++ " does not occur in typed thing: " ++ pprString tt
+ Just i -> i
+ where
+ dcs = datacons_for tt
+
+-- | Gets all datacons for the given typed thing. Errors out if the
+-- typed thing is not ADT typed.
+datacons_for :: TypedThing t => t -> [DataCon.DataCon]
+datacons_for tt =
+ case getType tt of
+ Nothing -> error $ "Getting datacon index of untyped thing? " ++ pprString tt
+ Just ty -> case Type.splitTyConApp_maybe ty of
+ Nothing -> error $ "Trying to find datacon in a type without a tycon?" ++ pprString ty
+ Just (tycon, _) -> case TyCon.tyConDataCons_maybe tycon of
+ Nothing -> error $ "Trying to find datacon in a type without datacons?" ++ pprString ty
+ Just dcs -> dcs
+
-- Is the given core expression a lambda abstraction?
is_lam :: CoreSyn.CoreExpr -> Bool
is_lam (CoreSyn.Lam _ _) = True
-- | A class of things that (optionally) have a core Type. The type is
-- optional, since Type expressions don't have a type themselves.
-class TypedThing t where
+class Outputable.Outputable t => TypedThing t where
getType :: t -> Maybe Type.Type
instance TypedThing CoreSyn.CoreExpr where
Just (tycon, tyargs) -> case TyCon.tyConDataCons_maybe tycon of
-- The scrutinee type should have a single dataconstructor,
-- otherwise we can't construct a valid selector case.
- Just dcs | i < 0 || i >= length dcs -> error $ "\nCoreTools.mkSelCase: Creating extractor case, but datacon index is invalid." ++ error_msg
+ Just dcs | dc_i < 0 || dc_i >= length dcs -> error $ "\nCoreTools.mkSelCase: Creating extractor case, but datacon index is invalid." ++ error_msg
| otherwise -> do
let datacon = (dcs!!dc_i)
let field_tys = DataCon.dataConInstOrigArgTys datacon tyargs