#include "HsVersions.h"
-import HsSyn ( HsBinds(..), MonoBinds(..), collectMonoBinders )
+import HsSyn ( HsBinds(..), MonoBinds(..), collectLocatedMonoBinders )
import RdrHsSyn ( RdrNameMonoBinds )
-import RnHsSyn ( RenamedHsBinds, RenamedMonoBinds )
+import RnHsSyn ( RenamedHsBinds )
import CmdLineOpts ( opt_D_dump_deriv )
import TcMonad
-import Inst ( InstanceMapper )
-import TcEnv ( getEnvTyCons )
+import TcEnv ( InstEnv, getEnvTyCons, tcSetInstEnv, newDFunName )
import TcGenDeriv -- Deriv stuff
-import TcInstUtil ( InstInfo(..), buildInstanceEnvs )
+import TcInstUtil ( InstInfo(..), pprInstInfo, instInfoClass, simpleInstInfoTyCon, buildInstanceEnv )
import TcSimplify ( tcSimplifyThetas )
import RnBinds ( rnMethodBinds, rnTopMonoBinds )
-import RnEnv ( newDFunName, bindLocatedLocalsRn )
+import RnEnv ( bindLocatedLocalsRn )
import RnMonad ( RnNameSupply,
renameSourceCode, thenRn, mapRn, returnRn )
import Bag ( Bag, emptyBag, unionBags, listToBag )
import Class ( classKey, Class )
-import ErrUtils ( dumpIfSet, Message, pprBagOfErrors )
+import ErrUtils ( dumpIfSet, Message )
import MkId ( mkDictFunId )
import Id ( mkVanillaId )
import DataCon ( dataConArgTys, isNullaryDataCon, isExistentialDataCon )
import PrelInfo ( needsDataDeclCtxtClassKeys )
import Maybes ( maybeToBool, catMaybes )
-import Module ( ModuleName )
-import Name ( isLocallyDefined, getSrcLoc,
- Name, NamedThing(..),
- OccName, nameOccName
- )
+import Module ( Module )
+import Name ( isLocallyDefined, getSrcLoc, NamedThing(..) )
import RdrName ( RdrName )
-import RnMonad ( Fixities )
-import SrcLoc ( mkGeneratedSrcLoc, SrcLoc )
+import RnMonad ( FixityEnv )
+
import TyCon ( tyConTyVars, tyConDataCons, tyConDerivings,
tyConTheta, maybeTyConSingleCon, isDataTyCon,
isEnumerationTyCon, isAlgTyCon, TyCon
)
import TysWiredIn ( voidTy )
import Var ( TyVar )
-import Unique -- Keys stuff
+import PrelNames
import Bag ( bagToList )
-import Util ( zipWithEqual, sortLt, removeDups, assoc, thenCmp )
+import Util ( zipWithEqual, sortLt, thenCmp )
+import ListSetOps ( removeDups, assoc )
import Outputable
\end{code}
%************************************************************************
\begin{code}
-tcDeriving :: ModuleName -- name of module under scrutiny
- -> Fixities -- for the deriving code (Show/Read.)
- -> RnNameSupply -- for "renaming" bits of generated code
+tcDeriving :: PersistentRenamerState
+ -> Module -- name of module under scrutiny
-> Bag InstInfo -- What we already know about instances
- -> TcM s (Bag InstInfo, -- The generated "instance decls".
+ -> TcM (Bag InstInfo, -- The generated "instance decls".
RenamedHsBinds) -- Extra generated bindings
-tcDeriving modname fixs rn_name_supply inst_decl_infos_in
+tcDeriving prs mod inst_decl_infos_in
= recoverTc (returnTc (emptyBag, EmptyBinds)) $
-- Fish the "deriving"-related information out of the TcEnv
gen_taggery_Names new_inst_infos `thenTc` \ nm_alist_etc ->
+ tcGetEnv `thenNF_Tc` \ env ->
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 fixs) new_inst_infos
- mbinders = bagToList (collectMonoBinders extra_mbinds)
+ method_binds_s = map (gen_bind (tcGST env)) new_inst_infos
+ mbinders = collectLocatedMonoBinders extra_mbinds
-- 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 (
+ (rn_method_binds_s, rn_extra_binds)
+ = renameSourceCode mod prs (
bindLocatedLocalsRn (ptext (SLIT("deriving"))) mbinders $ \ _ ->
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)
+ mapRn rn_meths method_binds_s `thenRn` \ rn_method_binds_s ->
+ returnRn (rn_method_binds_s, rn_extra_binds)
)
- rn_one (cl_nm, tycon_nm, meth_binds)
- = newDFunName (cl_nm, tycon_nm)
- mkGeneratedSrcLoc `thenRn` \ dfun_name ->
- rnMethodBinds meth_binds `thenRn` \ (rn_meth_binds, _) ->
- returnRn (dfun_name, rn_meth_binds)
-
- really_new_inst_infos = zipWith gen_inst_info
- new_inst_infos
- dfun_names_w_method_binds
-
- ddump_deriv = ddump_deriving really_new_inst_infos rn_extra_binds
in
- ioToTc (dumpIfSet opt_D_dump_deriv "Derived instances" ddump_deriv) `thenTc_`
+ mapNF_Tc gen_inst_info (new_inst_infos `zip` rn_method_binds_s) `thenNF_Tc` \ really_new_inst_infos ->
+
+ ioToTc (dumpIfSet opt_D_dump_deriv "Derived instances"
+ (ddump_deriving really_new_inst_infos rn_extra_binds)) `thenTc_`
returnTc (listToBag really_new_inst_infos, rn_extra_binds)
where
ddump_deriving :: [InstInfo] -> RenamedHsBinds -> SDoc
ddump_deriving inst_infos extra_binds
- = vcat (map pp_info inst_infos) $$ ppr extra_binds
+ = vcat (map pprInstInfo inst_infos) $$ ppr extra_binds
where
- pp_info (InstInfo clas tvs [ty] inst_decl_theta _ mbinds _ _)
- = ppr (mkSigmaTy tvs inst_decl_theta' (mkDictTy clas [ty]))
- $$
- ppr mbinds
- where inst_decl_theta' = classesToPreds inst_decl_theta
+
+ -- Paste the dfun id and method binds into the InstInfo
+ gen_inst_info (InstInfo clas tyvars tys@(ty:_) inst_decl_theta _ _ locn _, meth_binds)
+ = newDFunName mod clas tys locn `thenNF_Tc` \ dfun_name ->
+ let
+ dfun_id = mkDictFunId dfun_name clas tyvars tys inst_decl_theta
+ in
+ returnNF_Tc (InstInfo clas tyvars tys inst_decl_theta
+ dfun_id meth_binds locn [])
+
+ rn_meths meths = rnMethodBinds [] meths `thenRn` \ (meths', _) -> returnRn meths'
+ -- Ignore the free vars returned
\end{code}
all those.
\begin{code}
-makeDerivEqns :: TcM s [DerivEqn]
+makeDerivEqns :: TcM [DerivEqn]
makeDerivEqns
= tcGetEnv `thenNF_Tc` \ env ->
think_about_deriving = need_deriving local_data_tycons
(derive_these, _) = removeDups cmp_deriv think_about_deriving
- eqns = map mk_eqn derive_these
in
if null local_data_tycons then
returnTc [] -- Bale out now
= (c1 `compare` c2) `thenCmp` (t1 `compare` t2)
------------------------------------------------------------------
- mk_eqn :: (Class, TyCon) -> NF_TcM s (Maybe DerivEqn)
+ mk_eqn :: (Class, TyCon) -> NF_TcM (Maybe DerivEqn)
-- we swizzle the tyvars and datacons out of the tycon
-- to make the rest of the equation
------------------------------------------------------------------
chk_out :: Class -> TyCon -> Maybe Message
chk_out clas tycon
- | clas_key == enumClassKey && not is_enumeration = bog_out nullary_why
- | clas_key == boundedClassKey && not is_enumeration_or_single = bog_out single_nullary_why
- | clas_key == ixClassKey && not is_enumeration_or_single = bog_out single_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
where
- clas_key = classKey clas
-
is_enumeration = isEnumerationTyCon tycon
is_single_con = maybeToBool (maybeTyConSingleCon tycon)
is_enumeration_or_single = is_enumeration || is_single_con
\begin{code}
solveDerivEqns :: Bag InstInfo
-> [DerivEqn]
- -> TcM s [InstInfo] -- Solns in same order as eqns.
+ -> TcM [InstInfo] -- Solns in same order as eqns.
-- This bunch is Absolutely minimal...
solveDerivEqns inst_decl_infos_in orig_eqns
-- compares it with the current one; finishes if they are the
-- same, otherwise recurses with the new solutions.
-- It fails if any iteration fails
- iterateDeriv :: [DerivSoln] ->TcM s [InstInfo]
+ iterateDeriv :: [DerivSoln] ->TcM [InstInfo]
iterateDeriv current_solns
= checkNoErrsTc (iterateOnce current_solns) `thenTc` \ (new_inst_infos, new_solns) ->
if (current_solns == new_solns) then
-- with the current set of solutions, giving a
add_solns inst_decl_infos_in orig_eqns current_solns
- `thenNF_Tc` \ (new_inst_infos, inst_mapper) ->
- let
- class_to_inst_env cls = inst_mapper cls
- in
+ `thenNF_Tc` \ (new_inst_infos, inst_env) ->
+
-- Simplify each RHS
- listTc [ tcAddErrCtxt (derivCtxt tc) $
- tcSimplifyThetas class_to_inst_env deriv_rhs
- | (_,tc,_,deriv_rhs) <- orig_eqns ] `thenTc` \ next_solns ->
+ tcSetInstEnv inst_env (
+ listTc [ tcAddErrCtxt (derivCtxt tc) $
+ tcSimplifyThetas deriv_rhs
+ | (_,tc,_,deriv_rhs) <- orig_eqns ]
+ ) `thenTc` \ next_solns ->
-- Canonicalise the solutions, so they compare nicely
let canonicalised_next_solns
\begin{code}
add_solns :: Bag InstInfo -- The global, non-derived ones
-> [DerivEqn] -> [DerivSoln]
- -> NF_TcM s ([InstInfo], -- The new, derived ones
- InstanceMapper)
+ -> NF_TcM ([InstInfo], -- The new, derived ones
+ InstEnv)
-- the eqns and solns move "in lockstep"; we have the eqns
-- because we need the LHS info for addClassInstance.
add_solns inst_infos_in eqns solns
- = discardErrsTc (buildInstanceEnvs all_inst_infos) `thenNF_Tc` \ inst_mapper ->
+ = discardErrsTc (buildInstanceEnv all_inst_infos) `thenNF_Tc` \ inst_env ->
-- We do the discard-errs so that we don't get repeated error messages
-- about duplicate instances.
- -- They'll appear later, when we do the top-level buildInstanceEnvs.
+ -- They'll appear later, when we do the top-level buildInstanceEnv.
- returnNF_Tc (new_inst_infos, inst_mapper)
+ returnNF_Tc (new_inst_infos, inst_env)
where
new_inst_infos = zipWithEqual "add_solns" mk_deriv_inst_info eqns solns
mk_deriv_inst_info (clas, tycon, tyvars, _) theta
= InstInfo clas tyvars [mkTyConApp tycon (mkTyVarTys tyvars)]
- theta
+ theta'
dummy_dfun_id
(my_panic "binds") (getSrcLoc tycon)
(my_panic "upragmas")
-- Generate the method bindings for the required instance
-- (paired with class name, as we need that when generating dict
-- names.)
-gen_bind :: Fixities -> InstInfo -> ({-class-}OccName, {-tyCon-}OccName, RdrNameMonoBinds)
-gen_bind fixities (InstInfo clas _ [ty] _ _ _ _ _)
- | not from_here
- = (clas_nm, tycon_nm, EmptyMonoBinds)
- | ckey == showClassKey
- = (clas_nm, tycon_nm, gen_Show_binds fixities tycon)
- | ckey == readClassKey
- = (clas_nm, tycon_nm, gen_Read_binds fixities tycon)
+gen_bind :: GlobalSymbolTable -> InstInfo -> RdrNameMonoBinds
+gen_bind fixities inst
+ | not (isLocallyDefined tycon) = EmptyMonoBinds
+ | clas `hasKey` showClassKey = gen_Show_binds fixities tycon
+ | clas `hasKey` readClassKey = gen_Read_binds fixities tycon
| otherwise
- = (clas_nm, tycon_nm,
- assoc "gen_bind:bad derived class"
+ = 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)
]
- ckey
- tycon)
- where
- clas_nm = nameOccName (getName clas)
- tycon_nm = nameOccName (getName tycon)
- from_here = isLocallyDefined tycon
- (tycon,_,_) = splitAlgTyConApp ty
- ckey = classKey clas
-
-
-gen_inst_info :: InstInfo
- -> (Name, RenamedMonoBinds)
- -> InstInfo -- the gen'd (filled-in) "instance decl"
-
-gen_inst_info (InstInfo clas tyvars tys@(ty:_) inst_decl_theta _ _ locn _)
- (dfun_name, meth_binds)
- =
- -- Generate the various instance-related Ids
- InstInfo clas tyvars tys inst_decl_theta
- dfun_id
- meth_binds
- locn []
+ (classKey clas)
+ tycon
where
- dfun_id = mkDictFunId dfun_name clas tyvars tys inst_decl_theta
-
- from_here = isLocallyDefined tycon
- (tycon,_,_) = splitAlgTyConApp ty
+ clas = instInfoClass inst
+ tycon = simpleInstInfoTyCon inst
\end{code}
\begin{code}
gen_taggery_Names :: [InstInfo]
- -> TcM s [(RdrName, -- for an assoc list
+ -> TcM [(RdrName, -- for an assoc list
TyCon, -- related tycon
TagThingWanted)]
foldlTc do_con2tag [] tycons_of_interest `thenTc` \ names_so_far ->
foldlTc do_tag2con names_so_far tycons_of_interest
where
- all_CTs = [ (c, get_tycon ty) | (InstInfo c _ [ty] _ _ _ _ _) <- inst_infos ]
+ all_CTs = [ (instInfoClass info, simpleInstInfoTyCon info) | info <- inst_infos ]
- get_tycon ty = case splitAlgTyConApp ty of { (tc, _, _) -> tc }
-
- all_tycons = map snd all_CTs
+ all_tycons = map snd all_CTs
(tycons_of_interest, _) = removeDups compare all_tycons
do_con2tag acc_Names tycon
projects / ghc-hetmet.git / blobdiff