import {-# SOURCE #-} TcExpr( tcSyntaxOp )
import HsSyn ( Pat(..), LPat, HsConDetails(..), HsLit(..),
- HsOverLit(..), HsExpr(..), ExprCoFn(..),
+ HsOverLit(..), HsExpr(..), HsWrapper(..),
mkCoPat,
LHsBinds, emptyLHsBinds, isEmptyLHsBinds,
collectPatsBinders, nlHsLit )
import StaticFlags ( opt_IrrefutableTuples )
import TyCon ( TyCon, FieldLabel, tyConFamInst_maybe,
tyConFamilyCoercion_maybe, tyConTyVars )
-import DataCon ( DataCon, dataConTyCon, dataConFullSig,
+import DataCon ( DataCon, dataConTyCon, dataConFullSig, dataConName,
dataConFieldLabels, dataConSourceArity,
dataConStupidTheta, dataConUnivTyVars )
import PrelNames ( integralClassName, fromIntegerName, integerTyConName,
; dicts <- newDictBndrs loc theta'
; dict_binds <- tcSimplifyCheck doc ex_tvs' dicts lie_req
- ; addDataConStupidTheta origin data_con ctxt_res_tys
+ ; addDataConStupidTheta data_con ctxt_res_tys
; return
(unwrapFamInstScrutinee tycon ctxt_res_tys $
-- NB: We can use CoPat directly, rather than mkCoPat, as we know the
-- coercion is not the identity; mkCoPat is inconvenient as it
-- wants a located pattern.
- = CoPat (ExprCoFn $ mkTyConApp co_con args) -- co fam ty to repr ty
+ = CoPat (WpCo $ mkTyConApp co_con args) -- co fam ty to repr ty
(pat {pat_ty = mkTyConApp tycon args}) -- representation type
pat_ty -- family inst type
| otherwise
\end{code}
\begin{code}
-addDataConStupidTheta :: InstOrigin -> DataCon -> [TcType] -> TcM ()
+addDataConStupidTheta :: DataCon -> [TcType] -> TcM ()
-- Instantiate the "stupid theta" of the data con, and throw
-- the constraints into the constraint set
-addDataConStupidTheta origin data_con inst_tys
+addDataConStupidTheta data_con inst_tys
| null stupid_theta = return ()
| otherwise = instStupidTheta origin inst_theta
where
+ origin = OccurrenceOf (dataConName data_con)
+ -- The origin should always report "occurrence of C"
+ -- even when C occurs in a pattern
stupid_theta = dataConStupidTheta data_con
tenv = zipTopTvSubst (dataConUnivTyVars data_con) inst_tys
inst_theta = substTheta tenv stupid_theta