import HscTypes ( DFunId, PersistentRenamerState )
import BasicTypes ( Fixity )
-import Class ( classKey, Class )
+import Class ( className, classKey, Class )
import ErrUtils ( dumpIfSet_dyn, Message )
import MkId ( mkDictFunId )
import DataCon ( dataConArgTys, isNullaryDataCon, isExistentialDataCon )
import PrelInfo ( needsDataDeclCtxtClassKeys )
import Maybes ( maybeToBool, catMaybes )
import Module ( Module )
-import Name ( Name, getSrcLoc )
+import Name ( Name, getSrcLoc, nameUnique )
import RdrName ( RdrName )
import TyCon ( tyConTyVars, tyConDataCons,
tyConTheta, maybeTyConSingleCon, isDataTyCon,
isEnumerationTyCon, TyCon
)
-import Type ( TauType, ThetaType, PredType, mkTyVarTys, mkTyConApp,
+import TcType ( ThetaType, mkTyVarTys, mkTyConApp,
isUnLiftedType, mkClassPred )
import Var ( TyVar )
import PrelNames
-- Make a Real dfun instead of the dummy one we have so far
gen_inst_info :: DFunId -> RenamedMonoBinds -> InstInfo
gen_inst_info dfun binds
- = InstInfo { iDFunId = dfun,
- iBinds = binds, iPrags = [] }
+ = InstInfo { iDFunId = dfun, iBinds = binds, iPrags = [] }
- rn_meths meths = rnMethodBinds [] meths `thenRn` \ (meths', _) -> returnRn meths'
- -- Ignore the free vars returned
+ rn_meths (cls, meths) = rnMethodBinds cls [] meths `thenRn` \ (meths', _) ->
+ returnRn meths' -- Ignore the free vars returned
\end{code}
]
in
case chk_out clas tycon of
- Just err -> addErrTc err `thenNF_Tc_`
+ Just err -> tcAddSrcLoc (getSrcLoc tycon) $
+ addErrTc err `thenNF_Tc_`
returnNF_Tc Nothing
Nothing -> newDFunName clas [ty] locn `thenNF_Tc` \ dfun_name ->
returnNF_Tc (Just (dfun_name, clas, tycon, tyvars, constraints))
------------------------------------------------------------------
chk_out :: Class -> TyCon -> Maybe Message
chk_out clas tycon
- | clas `hasKey` enumClassKey && not is_enumeration = bog_out nullary_why
+ | clas `hasKey` enumClassKey && not is_enumeration = bog_out nullary_why
| clas `hasKey` boundedClassKey && not is_enumeration_or_single = bog_out single_nullary_why
| clas `hasKey` ixClassKey && not is_enumeration_or_single = bog_out single_nullary_why
- | any isExistentialDataCon (tyConDataCons tycon) = Just (existentialErr clas tycon)
- | otherwise = Nothing
+ | null data_cons = bog_out no_cons_why
+ | any isExistentialDataCon data_cons = Just (existentialErr clas tycon)
+ | otherwise = Nothing
where
+ data_cons = tyConDataCons tycon
is_enumeration = isEnumerationTyCon tycon
is_single_con = maybeToBool (maybeTyConSingleCon tycon)
is_enumeration_or_single = is_enumeration || is_single_con
single_nullary_why = SLIT("one constructor data type or type with all nullary constructors expected")
nullary_why = SLIT("data type with all nullary constructors expected")
+ no_cons_why = SLIT("type has no data constructors")
bog_out why = Just (derivingThingErr clas tycon why)
\end{code}
\begin{code}
-- Generate the method bindings for the required instance
--- (paired with class name, as we need that when generating dict
--- names.)
-gen_bind :: (Name -> Maybe Fixity) -> DFunId -> RdrNameMonoBinds
+-- (paired with class name, as we need that when renaming
+-- the method binds)
+gen_bind :: (Name -> Maybe Fixity) -> DFunId -> (Name, RdrNameMonoBinds)
gen_bind get_fixity dfun
- | clas `hasKey` showClassKey = gen_Show_binds get_fixity tycon
- | clas `hasKey` readClassKey = gen_Read_binds get_fixity tycon
- | otherwise
- = assoc "gen_bind:bad derived class"
- [(eqClassKey, gen_Eq_binds)
- ,(ordClassKey, gen_Ord_binds)
- ,(enumClassKey, gen_Enum_binds)
- ,(boundedClassKey, gen_Bounded_binds)
- ,(ixClassKey, gen_Ix_binds)
- ]
- (classKey clas)
- tycon
+ = (cls_nm, binds)
where
+ cls_nm = className clas
(clas, tycon) = simpleDFunClassTyCon dfun
+
+ binds = assoc "gen_bind:bad derived class" gen_list
+ (nameUnique cls_nm) tycon
+
+ gen_list = [(eqClassKey, gen_Eq_binds)
+ ,(ordClassKey, gen_Ord_binds)
+ ,(enumClassKey, gen_Enum_binds)
+ ,(boundedClassKey, gen_Bounded_binds)
+ ,(ixClassKey, gen_Ix_binds)
+ ,(showClassKey, gen_Show_binds get_fixity)
+ ,(readClassKey, gen_Read_binds get_fixity)
+ ]
\end{code}