\begin{code}
module TcModule (
typecheckModule,
- TcResults
+ TcResults(..)
) where
#include "HsVersions.h"
import CmdLineOpts ( opt_D_dump_tc )
import HsSyn ( HsModule(..), HsBinds(..), MonoBinds(..), HsDecl(..) )
import RnHsSyn ( RenamedHsModule )
-import TcHsSyn ( TcMonoBinds, TypecheckedMonoBinds, zonkTopBinds,
- TypecheckedForeignDecl, zonkForeignExports
+import TcHsSyn ( TcMonoBinds, TypecheckedMonoBinds,
+ TypecheckedForeignDecl, TypecheckedRuleDecl,
+ zonkTopBinds, zonkForeignExports, zonkRules
)
import TcMonad
ValueEnv, TcTyThing(..)
)
import TcExpr ( tcId )
+import TcRules ( tcRules )
import TcForeign ( tcForeignImports, tcForeignExports )
import TcIfaceSig ( tcInterfaceSigs )
import TcInstDcls ( tcInstDecls1, tcInstDecls2 )
newTyVarTy
)
-import RnMonad ( RnNameSupply )
+import RnMonad ( RnNameSupply, getIfaceFixities, Fixities, InterfaceDetails )
import Bag ( isEmptyBag )
-import ErrUtils ( Message,
- pprBagOfErrors, dumpIfSet
- )
+import ErrUtils ( Message, printErrorsAndWarnings, dumpIfSet )
import Id ( Id, idType )
-import Name ( Name, nameUnique, isLocallyDefined, pprModule, NamedThing(..) )
+import Module ( pprModuleName )
+import Name ( Name, nameUnique, isLocallyDefined, NamedThing(..) )
import TyCon ( TyCon, tyConKind )
import DataCon ( dataConId )
import Class ( Class, classSelIds, classTyCon )
-import Type ( mkTyConApp, mkForAllTy, mkTyVarTy,
+import Type ( mkTyConApp, mkForAllTy,
boxedTypeKind, getTyVar, Type )
import TysWiredIn ( unitTy )
-import PrelMods ( mAIN )
-import PrelInfo ( main_NAME, ioTyCon_NAME,
- thinAirIdNames, setThinAirIds
- )
+import PrelMods ( mAIN_Name )
+import PrelInfo ( main_NAME, thinAirIdNames, setThinAirIds )
import TcUnify ( unifyTauTy )
import Unique ( Unique )
import UniqSupply ( UniqSupply )
+import Maybes ( maybeToBool )
import Util
import Bag ( Bag, isEmptyBag )
import Outputable
\begin{code}
-- Convenient type synonyms first:
-type TcResults
- = (TypecheckedMonoBinds,
- [TyCon], [Class],
- Bag InstInfo, -- Instance declaration information
- [TypecheckedForeignDecl], -- foreign import & exports.
- ValueEnv,
- [Id] -- The thin-air Ids
- )
+data TcResults
+ = TcResults {
+ tc_binds :: TypecheckedMonoBinds,
+ tc_tycons :: [TyCon],
+ tc_classes :: [Class],
+ tc_insts :: Bag InstInfo, -- Instance declaration information
+ tc_fords :: [TypecheckedForeignDecl], -- Foreign import & exports.
+ tc_rules :: [TypecheckedRuleDecl], -- Transformation rules
+ tc_env :: ValueEnv,
+ tc_thinair :: [Id] -- The thin-air Ids
+ }
---------------
typecheckModule
:: UniqSupply
-> RnNameSupply
+ -> InterfaceDetails
-> RenamedHsModule
-> IO (Maybe TcResults)
-typecheckModule us rn_name_supply mod
- = initTc us initEnv (tcModule rn_name_supply mod) >>= \ (maybe_result, warns, errs) ->
+typecheckModule us rn_name_supply iface_det mod
+ = initTc us initEnv (tcModule rn_name_supply (getIfaceFixities iface_det) mod)
+ >>= \ (maybe_result, warns, errs) ->
- print_errs warns >>
- print_errs errs >>
+ printErrorsAndWarnings errs warns >>
-- write the thin-air Id map
(case maybe_result of
- Just (_, _, _, _, _, _, thin_air_ids) -> setThinAirIds thin_air_ids
- Nothing -> return ()
+ Just results -> setThinAirIds (tc_thinair results)
+ Nothing -> return ()
) >>
dumpIfSet opt_D_dump_tc "Typechecked"
(case maybe_result of
- Just (binds, _, _, _, _, _, _) -> ppr binds
- Nothing -> text "Typecheck failed") >>
+ Just results -> ppr (tc_binds results)
+ $$
+ pp_rules (tc_rules results)
+ Nothing -> text "Typecheck failed") >>
return (if isEmptyBag errs then
maybe_result
else
Nothing)
-print_errs errs
- | isEmptyBag errs = return ()
- | otherwise = printErrs (pprBagOfErrors errs)
+pp_rules [] = empty
+pp_rules rs = vcat [ptext SLIT("{-# RULES"),
+ nest 4 (vcat (map ppr rs)),
+ ptext SLIT("#-}")]
\end{code}
The internal monster:
\begin{code}
tcModule :: RnNameSupply -- for renaming derivings
+ -> Fixities -- needed for Show/Read derivings.
-> RenamedHsModule -- input
-> TcM s TcResults -- output
-tcModule rn_name_supply
- (HsModule mod_name verion exports imports decls src_loc)
+tcModule rn_name_supply fixities
+ (HsModule mod_name verion exports imports decls _ src_loc)
= tcAddSrcLoc src_loc $ -- record where we're starting
fixTc (\ ~(unf_env ,_) ->
-- Typecheck the instance decls, includes deriving
tcSetEnv env (
- tcInstDecls1 unf_env decls mod_name rn_name_supply
+ tcInstDecls1 unf_env decls mod_name fixities rn_name_supply
) `thenTc` \ (inst_info, deriv_binds) ->
buildInstanceEnvs inst_info `thenNF_Tc` \ inst_mapper ->
-- to compile the bindings themselves.
tcInstDecls2 inst_info `thenNF_Tc` \ (lie_instdecls, inst_binds) ->
tcClassDecls2 decls `thenNF_Tc` \ (lie_clasdecls, cls_binds) ->
+ tcRules decls `thenNF_Tc` \ (lie_rules, rules) ->
- -- Check that "main" has the right signature
- tcCheckMainSig mod_name `thenTc_`
-- Deal with constant or ambiguous InstIds. How could
-- there be ambiguous ones? They can only arise if a
lie_alldecls = lie_valdecls `plusLIE`
lie_instdecls `plusLIE`
lie_clasdecls `plusLIE`
- lie_fodecls
+ lie_fodecls `plusLIE`
+ lie_rules
in
tcSimplifyTop lie_alldecls `thenTc` \ const_inst_binds ->
+ -- Check that Main defines main
+ (if mod_name == mAIN_Name then
+ tcLookupValueMaybe main_NAME `thenNF_Tc` \ maybe_main ->
+ checkTc (maybeToBool maybe_main) noMainErr
+ else
+ returnTc ()
+ ) `thenTc_`
-- Backsubstitution. This must be done last.
- -- Even tcCheckMainSig and tcSimplifyTop may do some unification.
+ -- Even tcSimplifyTop may do some unification.
let
all_binds = data_binds `AndMonoBinds`
val_binds `AndMonoBinds`
zonkTopBinds all_binds `thenNF_Tc` \ (all_binds', really_final_env) ->
tcSetValueEnv really_final_env $
zonkForeignExports foe_decls `thenNF_Tc` \ foe_decls' ->
+ zonkRules rules `thenNF_Tc` \ rules' ->
let
thin_air_ids = map (explicitLookupValueByKey really_final_env . nameUnique) thinAirIdNames
-- Hence using really_final_env
in
returnTc (really_final_env,
- (all_binds', local_tycons, local_classes, inst_info,
- (foi_decls ++ foe_decls'),
- really_final_env,
- thin_air_ids))
+ (TcResults { tc_binds = all_binds',
+ tc_tycons = local_tycons,
+ tc_classes = local_classes,
+ tc_insts = inst_info,
+ tc_fords = foi_decls ++ foe_decls',
+ tc_rules = rules',
+ tc_env = really_final_env,
+ tc_thinair = thin_air_ids
+ }))
)
-- End of outer fix loop
\begin{code}
-tcCheckMainSig mod_name
- | mod_name /= mAIN
- = returnTc () -- A non-main module
-
- | otherwise
- = -- Check that main is defined
- tcLookupTyCon ioTyCon_NAME `thenTc` \ ioTyCon ->
- tcLookupValueMaybe main_NAME `thenNF_Tc` \ maybe_main_id ->
- case maybe_main_id of {
- Nothing -> failWithTc noMainErr ;
- Just main_id ->
-
- -- Check that it has the right type (or a more general one)
- -- As of Haskell 98, anything that unifies with (IO a) is OK.
- newTyVarTy boxedTypeKind `thenNF_Tc` \ t_tv ->
- let
- tv = getTyVar "tcCheckMainSig" t_tv
- expected_tau = typeToTcType ((mkTyConApp ioTyCon [t_tv]))
- in
- tcId main_NAME `thenNF_Tc` \ (_, lie, main_tau) ->
- tcSetErrCtxt mainTyCheckCtxt $
- unifyTauTy expected_tau
- main_tau `thenTc_`
- checkTc (isEmptyBag lie) (mainTyMisMatch expected_tau (idType main_id))
- }
-
-
-mainTyCheckCtxt
- = hsep [ptext SLIT("When checking that"), ppr main_NAME, ptext SLIT("has the required type")]
-
noMainErr
- = hsep [ptext SLIT("Module"), quotes (pprModule mAIN),
+ = hsep [ptext SLIT("Module"), quotes (pprModuleName mAIN_Name),
ptext SLIT("must include a definition for"), quotes (ppr main_NAME)]
-
-mainTyMisMatch :: TcType -> TcType -> Message
-mainTyMisMatch expected actual
- = hang (hsep [ppr main_NAME, ptext SLIT("has the wrong type")])
- 4 (vcat [
- hsep [ptext SLIT("Expected:"), ppr expected],
- hsep [ptext SLIT("Inferred:"), ppr actual]
- ])
\end{code}
+
projects / ghc-hetmet.git / blobdiff