IMP_Ubiq()
-import HsSyn ( FixityDecl, Sig, HsBinds(..), Bind(..), MonoBinds(..),
+import HsSyn ( HsDecl, FixityDecl, Fixity, InstDecl,
+ Sig, HsBinds(..), Bind(..), MonoBinds(..),
GRHSsAndBinds, Match, HsExpr, HsLit, InPat,
- ArithSeqInfo, Fake, MonoType )
+ ArithSeqInfo, Fake, HsType
+ )
import HsPragmas ( InstancePragmas(..) )
-import RnHsSyn ( mkRnName, RnName(..), SYN_IE(RenamedHsBinds), RenamedFixityDecl(..) )
+import RdrHsSyn ( RdrName, SYN_IE(RdrNameMonoBinds) )
+import RnHsSyn ( SYN_IE(RenamedHsBinds), SYN_IE(RenamedMonoBinds), SYN_IE(RenamedFixityDecl) )
import TcHsSyn ( TcIdOcc )
import TcMonad
import TcInstUtil ( InstInfo(..), mkInstanceRelatedIds, buildInstanceEnvs )
import TcSimplify ( tcSimplifyThetas )
-import RnMonad
-import RnUtils ( SYN_IE(RnEnv), extendGlobalRnEnv )
-import RnBinds ( rnMethodBinds, rnTopBinds )
+import RnBinds ( rnMethodBinds, rnTopMonoBinds )
+import RnEnv ( newDfunName )
+import RnMonad ( SYN_IE(RnM), RnDown, GDown, SDown, RnNameSupply(..),
+ setNameSupplyRn, renameSourceCode, thenRn, mapRn, returnRn )
import Bag ( Bag, isEmptyBag, unionBags, listToBag )
-import Class ( classKey, needsDataDeclCtxtClassKeys, GenClass )
+import Class ( classKey, GenClass )
import ErrUtils ( pprBagOfErrors, addErrLoc, SYN_IE(Error) )
import Id ( dataConArgTys, isNullaryDataCon, mkDictFunId )
+import PrelInfo ( needsDataDeclCtxtClassKeys )
import Maybes ( maybeToBool )
-import Name ( isLocallyDefined, getSrcLoc,
- mkTopLevName, origName, mkImplicitName, ExportFlag(..),
- RdrName(..), Name{--O only-}
+import Name ( isLocallyDefined, getSrcLoc, ExportFlag(..), Provenance,
+ Name{--O only-}
)
import Outputable ( Outputable(..){-instances e.g., (,)-} )
import PprType ( GenType, GenTyVar, GenClass, TyCon )
\begin{code}
tcDeriving :: Module -- name of module under scrutiny
- -> RnEnv -- for "renaming" bits of generated code
+ -> RnNameSupply -- for "renaming" bits of generated code
-> Bag InstInfo -- What we already know about instances
- -> [RenamedFixityDecl] -- Fixity info; used by Read and Show
-> TcM s (Bag InstInfo, -- The generated "instance decls".
RenamedHsBinds, -- Extra generated bindings
PprStyle -> Pretty) -- Printable derived instance decls;
-- for debugging via -ddump-derivings.
-tcDeriving modname rn_env inst_decl_infos_in fixities
+tcDeriving modname rn_name_supply inst_decl_infos_in
= -- Fish the "deriving"-related information out of the TcEnv
-- and make the necessary "equations".
- makeDerivEqns `thenTc` \ eqns ->
+ makeDerivEqns `thenTc` \ eqns ->
-- Take the equation list and solve it, to deliver a list of
-- solutions, a.k.a. the contexts for the instance decls
-- required for the corresponding equations.
- solveDerivEqns inst_decl_infos_in eqns
- `thenTc` \ new_inst_infos ->
+ solveDerivEqns inst_decl_infos_in eqns `thenTc` \ new_inst_infos ->
-- Now augment the InstInfos, adding in the rather boring
-- actual-code-to-do-the-methods binds. We may also need to
-- "con2tag" and/or "tag2con" functions. We do these
-- separately.
- gen_taggery_Names new_inst_infos `thenTc` \ nm_alist_etc ->
- gen_tag_n_con_binds rn_env nm_alist_etc
- `thenTc` \ (extra_binds, deriver_rn_env) ->
+ gen_taggery_Names new_inst_infos `thenTc` \ nm_alist_etc ->
+
+
+ let
+ extra_mbind_list = map gen_tag_n_con_monobind nm_alist_etc
+ extra_mbinds = foldr AndMonoBinds EmptyMonoBinds extra_mbind_list
+ method_binds_s = map gen_bind new_inst_infos
+
+ -- Rename to get RenamedBinds.
+ -- The only tricky bit is that the extra_binds must scope over the
+ -- method bindings for the instances.
+ (dfun_names_w_method_binds, rn_extra_binds)
+ = renameSourceCode modname rn_name_supply (
+ rnTopMonoBinds extra_mbinds [] `thenRn` \ rn_extra_binds ->
+ mapRn rn_one method_binds_s `thenRn` \ dfun_names_w_method_binds ->
+ returnRn (dfun_names_w_method_binds, rn_extra_binds)
+ )
+ rn_one meth_binds = newDfunName mkGeneratedSrcLoc `thenRn` \ dfun_name ->
+ rnMethodBinds meth_binds `thenRn` \ rn_meth_binds ->
+ returnRn (dfun_name, rn_meth_binds)
+ in
- mapTc (gen_inst_info modname fixities deriver_rn_env) new_inst_infos
- `thenTc` \ really_new_inst_infos ->
+ mapTc (gen_inst_info modname)
+ (new_inst_infos `zip` dfun_names_w_method_binds) `thenTc` \ really_new_inst_infos ->
let
- ddump_deriv = ddump_deriving really_new_inst_infos extra_binds
+ ddump_deriv = ddump_deriving really_new_inst_infos rn_extra_binds
in
--pprTrace "derived:\n" (ddump_deriv PprDebug) $
returnTc (listToBag really_new_inst_infos,
- extra_binds,
+ rn_extra_binds,
ddump_deriv)
where
ddump_deriving :: [InstInfo] -> RenamedHsBinds -> (PprStyle -> Pretty)
ddump_deriving inst_infos extra_binds sty
= ppAboves ((map pp_info inst_infos) ++ [ppr sty extra_binds])
where
- pp_info (InstInfo clas tvs ty inst_decl_theta _ _ _ mbinds _ _ _ _)
+ pp_info (InstInfo clas tvs ty inst_decl_theta _ _ mbinds _ _)
= ppAbove (ppr sty (mkSigmaTy tvs inst_decl_theta (mkDictTy clas ty)))
(ppr sty mbinds)
\end{code}
makeDerivEqns
= tcGetEnv `thenNF_Tc` \ env ->
- tcLookupClassByKey evalClassKey `thenNF_Tc` \ eval_clas ->
let
- tycons = filter isDataTyCon (getEnv_TyCons env)
+ local_data_tycons = filter (\tc -> isLocallyDefined tc && isDataTyCon tc)
+ (getEnv_TyCons env)
-- ToDo: what about newtypes???
- think_about_deriving = need_deriving eval_clas tycons
in
- mapTc chk_out think_about_deriving `thenTc_`
+ if null local_data_tycons then
+ -- Bale out now; evalClass may not be loaded if there aren't any
+ returnTc []
+ else
+ tcLookupClassByKey evalClassKey `thenNF_Tc` \ eval_clas ->
let
- (derive_these, _) = removeDups cmp_deriv think_about_deriving
- eqns = map mk_eqn derive_these
+ think_about_deriving = need_deriving eval_clas local_data_tycons
+ (derive_these, _) = removeDups cmp_deriv think_about_deriving
+ eqns = map mk_eqn derive_these
in
+ mapTc chk_out think_about_deriving `thenTc_`
returnTc eqns
where
------------------------------------------------------------------
dummy_dfun_id
- (my_panic "const_meth_ids")
- (my_panic "binds") (my_panic "from_here")
- (my_panic "modname") mkGeneratedSrcLoc
+ (my_panic "binds") (getSrcLoc tycon)
(my_panic "upragmas")
where
dummy_dfun_id
- = mkDictFunId bottom bottom bottom dummy_dfun_ty
- bottom bottom bottom bottom
+ = mkDictFunId bottom dummy_dfun_ty bottom bottom
where
bottom = panic "dummy_dfun_id"
\end{itemize}
\begin{code}
-gen_inst_info :: Module -- Module name
- -> [RenamedFixityDecl] -- all known fixities;
- -- may be needed for Text
- -> RnEnv -- lookup stuff for names we may use
- -> InstInfo -- the main stuff to work on
- -> TcM s InstInfo -- the gen'd (filled-in) "instance decl"
-
-gen_inst_info modname fixities deriver_rn_env
- (InstInfo clas tyvars ty inst_decl_theta _ _ _ _ _ _ locn _)
+-- Generate the method bindings for the required instance
+gen_bind :: InstInfo -> RdrNameMonoBinds
+gen_bind (InstInfo clas _ ty _ _ _ _ _ _)
+ | not from_here
+ = EmptyMonoBinds
+ | otherwise
+ = assoc "gen_inst_info:bad derived class"
+ [(eqClassKey, gen_Eq_binds)
+ ,(ordClassKey, gen_Ord_binds)
+ ,(enumClassKey, gen_Enum_binds)
+ ,(evalClassKey, gen_Eval_binds)
+ ,(boundedClassKey, gen_Bounded_binds)
+ ,(showClassKey, gen_Show_binds)
+ ,(readClassKey, gen_Read_binds)
+ ,(ixClassKey, gen_Ix_binds)
+ ]
+ (classKey clas)
+ tycon
+ where
+ from_here = isLocallyDefined tycon
+ (tycon,_,_) = getAppDataTyCon ty
+
+
+gen_inst_info :: Module -- Module name
+ -> (InstInfo, (Name, RenamedMonoBinds)) -- the main stuff to work on
+ -> TcM s InstInfo -- the gen'd (filled-in) "instance decl"
+
+gen_inst_info modname
+ (InstInfo clas tyvars ty inst_decl_theta _ _ _ locn _, (dfun_name, meth_binds))
=
-- Generate the various instance-related Ids
mkInstanceRelatedIds
- True {-from_here-} locn modname
- NoInstancePragmas
+ dfun_name
clas tyvars ty
inst_decl_theta
- [{-no user pragmas-}]
- `thenTc` \ (dfun_id, dfun_theta, const_meth_ids) ->
+ `thenNF_Tc` \ (dfun_id, dfun_theta) ->
- -- Generate the bindings for the new instance declaration,
- -- rename it, and check for errors
- let
- (tycon,_,_) = --pprTrace "gen_inst_info:ty" (ppCat[ppr PprDebug clas, ppr PprDebug ty]) $
- getAppDataTyCon ty
-
- proto_mbinds
- = assoc "gen_inst_info:bad derived class"
- [(eqClassKey, gen_Eq_binds)
- ,(ordClassKey, gen_Ord_binds)
- ,(enumClassKey, gen_Enum_binds)
- ,(evalClassKey, gen_Eval_binds)
- ,(boundedClassKey, gen_Bounded_binds)
- ,(showClassKey, gen_Show_binds fixities)
- ,(readClassKey, gen_Read_binds fixities)
- ,(ixClassKey, gen_Ix_binds)
- ]
- clas_key $ tycon
- in
-{-
- let
- ((qual, unqual, tc_qual, tc_unqual), stack) = deriver_rn_env
- in
- pprTrace "gen_inst:qual:" (ppCat [ppBesides[ppPStr m,ppChar '.',ppPStr n] | (n,m) <- keysFM qual]) $
- pprTrace "gen_inst:unqual:" (ppCat (map ppPStr (keysFM unqual))) $
- pprTrace "gen_inst:tc_qual:" (ppCat [ppBesides[ppPStr m,ppChar '.',ppPStr n] | (n,m) <- keysFM tc_qual]) $
- pprTrace "gen_inst:tc_unqual:" (ppCat (map ppPStr (keysFM tc_unqual))) $
--}
- -- pprTrace "derived binds:" (ppr PprDebug proto_mbinds) $
-
- rnMtoTcM deriver_rn_env (
- setExtraRn emptyUFM{-no fixities-} $
- rnMethodBinds clas_Name proto_mbinds
- ) `thenNF_Tc` \ (mbinds, errs) ->
-
- if not (isEmptyBag errs) then
- panic "gen_inst_info:renamer errs!\n"
--- pprPanic "gen_inst_info:renamer errs!\n"
--- (ppAbove (pprBagOfErrors PprDebug errs) (ppr PprDebug proto_mbinds))
- else
- -- All done
- let
- from_here = isLocallyDefined tycon -- If so, then from here
- in
returnTc (InstInfo clas tyvars ty inst_decl_theta
- dfun_theta dfun_id const_meth_ids
- (if from_here then mbinds else EmptyMonoBinds)
- from_here modname locn [])
+ dfun_theta dfun_id
+ meth_binds
+ locn [])
where
- clas_key = classKey clas
- clas_Name = RnImplicitClass (mkImplicitName clas_key (origName "gen_inst_info" clas))
+ from_here = isLocallyDefined tycon
+ (tycon,_,_) = getAppDataTyCon ty
\end{code}
+
%************************************************************************
%* *
-\subsection[TcGenDeriv-con2tag-tag2con]{Generating extra binds (@con2tag@ and @tag2con@)}
+\subsection[TcDeriv-taggery-Names]{What con2tag/tag2con functions are available?}
%* *
%************************************************************************
+
data Foo ... = ...
con2tag_Foo :: Foo ... -> Int#
tag2con_Foo :: Int -> Foo ... -- easier if Int, not Int#
maxtag_Foo :: Int -- ditto (NB: not unboxed)
-\begin{code}
-gen_tag_n_con_binds :: RnEnv
- -> [(RdrName, TyCon, TagThingWanted)]
- -> TcM s (RenamedHsBinds,
- RnEnv) -- input one with any new names added
-
-gen_tag_n_con_binds rn_env nm_alist_etc
- =
- let
- -- We have the renamer's final "name funs" in our hands
- -- (they were passed in). So we can handle ProtoNames
- -- that refer to anything "out there". But our generated
- -- code may also mention "con2tag" (etc.). So we need
- -- to augment to "name funs" to include those.
-
- names_to_add = [ pn | (pn,_,_) <- nm_alist_etc ]
- in
- tcGetUniques (length names_to_add) `thenNF_Tc` \ uniqs ->
- let
- pairs_to_add = [ case pn of { Qual pnm pnn ->
- (pn, mkRnName (mkTopLevName u (OrigName pnm pnn) mkGeneratedSrcLoc ExportAll [])) }
- | (pn,u) <- zipEqual "gen_tag..." names_to_add uniqs ]
-
- deriver_rn_env
- = if null names_to_add
- then rn_env else added_rn_env
-
- (added_rn_env, errs_bag)
- = extendGlobalRnEnv rn_env pairs_to_add [{-no tycons-}]
-
- ----------------
- proto_mbind_list = map gen_tag_n_con_monobind nm_alist_etc
- proto_mbinds = foldr AndMonoBinds EmptyMonoBinds proto_mbind_list
- in
- ASSERT(isEmptyBag errs_bag)
-
- rnMtoTcM deriver_rn_env (
- setExtraRn emptyUFM{-no fixities-} $
- rnTopBinds (SingleBind (RecBind proto_mbinds))
- ) `thenNF_Tc` \ (binds, errs) ->
-
- if not (isEmptyBag errs) then
- panic "gen_tag_n_con_binds:renamer errs!\n"
--- pprPanic "gen_tag_n_con_binds:renamer errs!\n"
--- (ppAbove (pprBagOfErrors PprDebug errs) (ppr PprDebug binds))
- else
- returnTc (binds, deriver_rn_env)
-\end{code}
-
-%************************************************************************
-%* *
-\subsection[TcDeriv-taggery-Names]{What con2tag/tag2con functions are available?}
-%* *
-%************************************************************************
We have a @con2tag@ function for a tycon if:
\begin{itemize}
foldlTc do_con2tag [] tycons_of_interest `thenTc` \ names_so_far ->
foldlTc do_tag2con names_so_far tycons_of_interest
where
- all_CTs = [ mk_CT c ty | (InstInfo c _ ty _ _ _ _ _ _ _ _ _) <- inst_infos ]
+ all_CTs = [ mk_CT c ty | (InstInfo c _ ty _ _ _ _ _ _) <- inst_infos ]
mk_CT c ty = (c, fst (getAppTyCon ty))
|| (we_are_deriving enumClassKey tycon)
|| (we_are_deriving ixClassKey tycon)
then
- returnTc ((con2tag_PN tycon, tycon, GenCon2Tag)
+ returnTc ((con2tag_RDR tycon, tycon, GenCon2Tag)
: acc_Names)
else
returnTc acc_Names
= if (we_are_deriving enumClassKey tycon)
|| (we_are_deriving ixClassKey tycon)
then
- returnTc ( (tag2con_PN tycon, tycon, GenTag2Con)
- : (maxtag_PN tycon, tycon, GenMaxTag)
+ returnTc ( (tag2con_RDR tycon, tycon, GenTag2Con)
+ : (maxtag_RDR tycon, tycon, GenMaxTag)
: acc_Names)
else
returnTc acc_Names
projects / ghc-hetmet.git / blobdiff