- def = pprPanic "tcLookupValue:" (ppr name)
-
-tcLookupValueMaybe :: Name -> NF_TcM s (Maybe Id)
-tcLookupValueMaybe name
- = case maybeWiredInIdName name of
- Just id -> returnNF_Tc (Just id)
- Nothing -> tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve ie gtvs) ->
- returnNF_Tc (lookupNameEnv ve name)
-
-tcLookupValueByKey :: Unique -> NF_TcM s Id -- Panics if not found
-tcLookupValueByKey key
- = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve ie gtvs) ->
- returnNF_Tc (explicitLookupValueByKey ve key)
-
-tcLookupValueByKeyMaybe :: Unique -> NF_TcM s (Maybe Id)
-tcLookupValueByKeyMaybe key
- = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve ie gtvs) ->
- returnNF_Tc (lookupUFM_Directly ve key)
-
-tcGetValueEnv :: NF_TcM s ValueEnv
-tcGetValueEnv
- = tcGetEnv `thenNF_Tc` \ (TcEnv ue te ve ie gtvs) ->
- returnNF_Tc ve
-
-
-tcSetValueEnv :: ValueEnv -> TcM s a -> TcM s a
-tcSetValueEnv ve scope
- = tcGetEnv `thenNF_Tc` \ (TcEnv ue te _ ie gtvs) ->
- tcSetEnv (TcEnv ue te ve ie gtvs) scope
-
--- Non-monadic version, environment given explicitly
-explicitLookupValueByKey :: ValueEnv -> Unique -> Id
-explicitLookupValueByKey ve key
- = lookupWithDefaultUFM_Directly ve def key
- where
- def = pprPanic "lookupValueByKey:" (pprUnique10 key)
-
-explicitLookupValue :: ValueEnv -> Name -> Maybe Id
-explicitLookupValue ve name
- = case maybeWiredInIdName name of
- Just id -> Just id
- Nothing -> lookupNameEnv ve name
-
- -- Extract the IdInfo from an IfaceSig imported from an interface file
-tcAddImportedIdInfo :: ValueEnv -> Id -> Id
-tcAddImportedIdInfo unf_env id
- | isLocallyDefined id -- Don't look up locally defined Ids, because they
- -- have explicit local definitions, so we get a black hole!
- = id
- | otherwise
- = id `lazySetIdInfo` new_info
- -- The Id must be returned without a data dependency on maybe_id
- where
- new_info = -- pprTrace "tcAdd" (ppr id) $
- case explicitLookupValue unf_env (getName id) of
- Nothing -> vanillaIdInfo
- Just imported_id -> idInfo imported_id
- -- ToDo: could check that types are the same
+ upd lcl_env = lcl_env { tcl_env = extend (tcl_env lcl_env) }
+ extend env = extendNameEnvList env [(n, AThing k) | (n,k) <- pairs]
+ -- No need to extend global tyvars for kind checking
+
+tcExtendTyVarEnv :: [TyVar] -> TcM r -> TcM r
+tcExtendTyVarEnv tvs thing_inside
+ = tc_extend_tv_env [(getName tv, ATyVar tv) | tv <- tvs] tvs thing_inside
+
+tcExtendTyVarEnv2 :: [(TyVar,TcTyVar)] -> TcM r -> TcM r
+tcExtendTyVarEnv2 tv_pairs thing_inside
+ = tc_extend_tv_env [(getName tv1, ATyVar tv2) | (tv1,tv2) <- tv_pairs]
+ [tv | (_,tv) <- tv_pairs]
+ thing_inside
+
+tc_extend_tv_env binds tyvars thing_inside
+ = getLclEnv `thenM` \ env@(TcLclEnv {tcl_env = le, tcl_tyvars = gtvs}) ->
+ let
+ le' = extendNameEnvList le binds
+ new_tv_set = mkVarSet tyvars
+ in
+ -- It's important to add the in-scope tyvars to the global tyvar set
+ -- as well. Consider
+ -- f (x::r) = let g y = y::r in ...
+ -- Here, g mustn't be generalised. This is also important during
+ -- class and instance decls, when we mustn't generalise the class tyvars
+ -- when typechecking the methods.
+ tc_extend_gtvs gtvs new_tv_set `thenM` \ gtvs' ->
+ setLclEnv (env {tcl_env = le', tcl_tyvars = gtvs'}) thing_inside