#include "HsVersions.h"
-import CmdLineOpts ( opt_D_dump_tc )
+import CmdLineOpts ( opt_D_dump_tc, opt_D_dump_types, opt_PprStyle_Debug )
import HsSyn ( HsModule(..), HsBinds(..), MonoBinds(..), HsDecl(..) )
+import HsTypes ( toHsType )
import RnHsSyn ( RenamedHsModule )
import TcHsSyn ( TcMonoBinds, TypecheckedMonoBinds,
TypecheckedForeignDecl, TypecheckedRuleDecl,
import TcMonad
import Inst ( Inst, emptyLIE, plusLIE )
import TcBinds ( tcTopBindsAndThen )
-import TcClassDcl ( tcClassDecls2 )
+import TcClassDcl ( tcClassDecls2, mkImplicitClassBinds )
import TcDefaults ( tcDefaults )
import TcEnv ( tcExtendGlobalValEnv, tcExtendTypeEnv,
- getEnvTyCons, getEnvClasses, tcLookupValueMaybe,
- explicitLookupValueByKey, tcSetValueEnv,
- tcLookupTyCon, initEnv,
- ValueEnv, TcTyThing(..)
+ getEnvTyCons, getEnvClasses, tcLookupValueByKeyMaybe,
+ tcSetValueEnv, tcSetInstEnv,
+ initEnv,
+ ValueEnv,
)
-import TcExpr ( tcId )
import TcRules ( tcRules )
import TcForeign ( tcForeignImports, tcForeignExports )
import TcIfaceSig ( tcInterfaceSigs )
import TcInstDcls ( tcInstDecls1, tcInstDecls2 )
-import TcInstUtil ( buildInstanceEnvs, classDataCon, InstInfo )
+import TcInstUtil ( buildInstanceEnv, InstInfo )
import TcSimplify ( tcSimplifyTop )
import TcTyClsDecls ( tcTyAndClassDecls )
-import TcTyDecls ( mkDataBinds )
-import TcType ( TcType, typeToTcType,
- TcKind, kindToTcKind,
- newTyVarTy
- )
+import TcTyDecls ( mkImplicitDataBinds )
+import TcType ( TcType, TcKind )
-import RnMonad ( RnNameSupply, getIfaceFixities, Fixities, InterfaceDetails )
+import RnMonad ( RnNameSupply, FixityEnv )
import Bag ( isEmptyBag )
-import ErrUtils ( Message,
- pprBagOfErrors, dumpIfSet
- )
-import Id ( Id, idType )
+import ErrUtils ( Message, printErrorsAndWarnings, dumpIfSet )
+import Id ( Id, idType, idName )
import Module ( pprModuleName )
-import Name ( Name, nameUnique, isLocallyDefined, NamedThing(..) )
+import OccName ( isSysOcc )
+import Name ( Name, nameUnique, nameOccName, isLocallyDefined,
+ toRdrName, nameEnvElts, NamedThing(..)
+ )
import TyCon ( TyCon, tyConKind )
-import DataCon ( dataConId )
import Class ( Class, classSelIds, classTyCon )
-import Type ( mkTyConApp, mkForAllTy,
- boxedTypeKind, getTyVar, Type )
-import TysWiredIn ( unitTy )
-import PrelMods ( mAIN_Name )
-import PrelInfo ( main_NAME, thinAirIdNames, setThinAirIds )
-import TcUnify ( unifyTauTy )
-import Unique ( Unique )
+import PrelInfo ( mAIN_Name )
+import Unique ( Unique, mainKey )
import UniqSupply ( UniqSupply )
import Maybes ( maybeToBool )
import Util
import Bag ( Bag, isEmptyBag )
import Outputable
-
-import IOExts
\end{code}
Outside-world interface:
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
+ tc_env :: ValueEnv
}
---------------
typecheckModule
:: UniqSupply
-> RnNameSupply
- -> InterfaceDetails
+ -> FixityEnv
-> RenamedHsModule
-> IO (Maybe TcResults)
-typecheckModule us rn_name_supply iface_det mod
- = initTc us initEnv (tcModule rn_name_supply (getIfaceFixities iface_det) mod)
- >>= \ (maybe_result, warns, errs) ->
+typecheckModule us rn_name_supply fixity_env mod
+ = initTc us initEnv (tcModule rn_name_supply fixity_env mod) >>= \ (maybe_result, warns, errs) ->
- print_errs warns >>
- print_errs errs >>
-
- -- write the thin-air Id map
+ printErrorsAndWarnings errs warns >>
+
(case maybe_result of
- Just results -> setThinAirIds (tc_thinair results)
- Nothing -> return ()
- ) >>
-
- dumpIfSet opt_D_dump_tc "Typechecked"
- (case maybe_result of
- Just results -> ppr (tc_binds results)
- $$
- pp_rules (tc_rules results)
- Nothing -> text "Typecheck failed") >>
-
+ Nothing -> return ()
+ Just results -> dumpIfSet opt_D_dump_types "Type signatures" (dump_sigs results) >>
+ dumpIfSet opt_D_dump_tc "Typechecked" (dump_tc results)
+ ) >>
+
return (if isEmptyBag errs then
maybe_result
else
Nothing)
+dump_tc results
+ = ppr (tc_binds results) $$ pp_rules (tc_rules results)
+
+dump_sigs results -- Print type signatures
+ = -- Convert to HsType so that we get source-language style printing
+ -- And sort by RdrName
+ vcat $ map ppr_sig $ sortLt lt_sig $
+ [(toRdrName id, toHsType (idType id)) | id <- nameEnvElts (tc_env results),
+ want_sig id
+ ]
+ where
+ lt_sig (n1,_) (n2,_) = n1 < n2
+ ppr_sig (n,t) = ppr n <+> dcolon <+> ppr t
+
+ want_sig id | opt_PprStyle_Debug = True
+ | otherwise = isLocallyDefined n && not (isSysOcc (nameOccName n))
+ where
+ n = idName id
+
pp_rules [] = empty
pp_rules rs = vcat [ptext SLIT("{-# RULES"),
nest 4 (vcat (map ppr rs)),
ptext SLIT("#-}")]
-
-print_errs errs
- | isEmptyBag errs = return ()
- | otherwise = printErrs (pprBagOfErrors errs)
\end{code}
The internal monster:
\begin{code}
tcModule :: RnNameSupply -- for renaming derivings
- -> Fixities -- needed for Show/Read derivings.
+ -> FixityEnv -- needed for Show/Read derivings.
-> RenamedHsModule -- input
-> TcM s TcResults -- output
tcModule rn_name_supply fixities
- (HsModule mod_name verion exports imports decls src_loc)
+ (HsModule mod_name _ _ _ decls _ src_loc)
= tcAddSrcLoc src_loc $ -- record where we're starting
fixTc (\ ~(unf_env ,_) ->
-- unf_env is also used to get the pragam info
-- for imported dfuns and default methods
- -- The knot for instance information. This isn't used at all
- -- till we type-check value declarations
- fixTc ( \ ~(rec_inst_mapper, _, _, _) ->
-
-- Type-check the type and class decls
- tcTyAndClassDecls unf_env rec_inst_mapper decls `thenTc` \ env ->
+ tcTyAndClassDecls unf_env decls `thenTc` \ env ->
-- Typecheck the instance decls, includes deriving
- tcSetEnv env (
- tcInstDecls1 unf_env decls mod_name fixities rn_name_supply
- ) `thenTc` \ (inst_info, deriv_binds) ->
-
- buildInstanceEnvs inst_info `thenNF_Tc` \ inst_mapper ->
-
- returnTc (inst_mapper, env, inst_info, deriv_binds)
-
- -- End of inner fix loop
- ) `thenTc` \ (_, env, inst_info, deriv_binds) ->
+ tcSetEnv env $
+
+ tcInstDecls1 unf_env decls
+ mod_name fixities
+ rn_name_supply `thenTc` \ (inst_info, deriv_binds) ->
- tcSetEnv env (
+ buildInstanceEnv inst_info `thenNF_Tc` \ inst_env ->
+
+ tcSetInstEnv inst_env $
+ let
+ tycons = getEnvTyCons env
+ classes = getEnvClasses env
+ local_tycons = filter isLocallyDefined tycons
+ local_classes = filter isLocallyDefined classes
+ in
-- Default declarations
tcDefaults decls `thenTc` \ defaulting_tys ->
tcSetDefaultTys defaulting_tys $
+ -- Interface type signatures
+ -- We tie a knot so that the Ids read out of interfaces are in scope
+ -- when we read their pragmas.
+ -- What we rely on is that pragmas are typechecked lazily; if
+ -- any type errors are found (ie there's an inconsistency)
+ -- we silently discard the pragma
+ -- We must do this before mkImplicitDataBinds (which comes next), since
+ -- the latter looks up unpackCStringId, for example, which is usually
+ -- imported
+ tcInterfaceSigs unf_env decls `thenTc` \ sig_ids ->
+ tcExtendGlobalValEnv sig_ids $
+
-- Create any necessary record selector Ids and their bindings
-- "Necessary" includes data and newtype declarations
-- We don't create bindings for dictionary constructors;
-- they are always fully applied, and the bindings are just there
-- to support partial applications
- let
- tycons = getEnvTyCons env
- classes = getEnvClasses env
- local_tycons = filter isLocallyDefined tycons
- local_classes = filter isLocallyDefined classes
- in
- mkDataBinds tycons `thenTc` \ (data_ids, data_binds) ->
+ mkImplicitDataBinds tycons `thenTc` \ (data_ids, imp_data_binds) ->
+ mkImplicitClassBinds classes `thenNF_Tc` \ (cls_ids, imp_cls_binds) ->
-- Extend the global value environment with
-- (a) constructors
-- (d) default-method ids... where? I can't see where these are
-- put into the envt, and I'm worried that the zonking phase
-- will find they aren't there and complain.
- tcExtendGlobalValEnv data_ids $
- tcExtendGlobalValEnv (concat (map classSelIds classes)) $
-
- -- Extend the TyCon envt with the tycons corresponding to
- -- the classes, and the global value environment with the
- -- corresponding data cons.
- -- They are mentioned in types in interface files.
- tcExtendGlobalValEnv (map (dataConId . classDataCon) classes) $
- tcExtendTypeEnv [ (getName tycon, (kindToTcKind (tyConKind tycon), Nothing, ATyCon tycon))
- | clas <- classes,
- let tycon = classTyCon clas
- ] $
-
- -- Interface type signatures
- -- We tie a knot so that the Ids read out of interfaces are in scope
- -- when we read their pragmas.
- -- What we rely on is that pragmas are typechecked lazily; if
- -- any type errors are found (ie there's an inconsistency)
- -- we silently discard the pragma
- tcInterfaceSigs unf_env decls `thenTc` \ sig_ids ->
- tcExtendGlobalValEnv sig_ids $
+ tcExtendGlobalValEnv data_ids $
+ tcExtendGlobalValEnv cls_ids $
-- foreign import declarations next.
tcForeignImports decls `thenTc` \ (fo_ids, foi_decls) ->
-- Second pass over class and instance declarations,
-- to compile the bindings themselves.
tcInstDecls2 inst_info `thenNF_Tc` \ (lie_instdecls, inst_binds) ->
- tcClassDecls2 decls `thenNF_Tc` \ (lie_clasdecls, cls_binds) ->
+ tcClassDecls2 decls `thenNF_Tc` \ (lie_clasdecls, cls_dm_binds) ->
tcRules decls `thenNF_Tc` \ (lie_rules, rules) ->
-- Check that Main defines main
(if mod_name == mAIN_Name then
- tcLookupValueMaybe main_NAME `thenNF_Tc` \ maybe_main ->
+ tcLookupValueByKeyMaybe mainKey `thenNF_Tc` \ maybe_main ->
checkTc (maybeToBool maybe_main) noMainErr
else
returnTc ()
-- Backsubstitution. This must be done last.
-- Even tcSimplifyTop may do some unification.
let
- all_binds = data_binds `AndMonoBinds`
+ all_binds = imp_data_binds `AndMonoBinds`
+ imp_cls_binds `AndMonoBinds`
val_binds `AndMonoBinds`
inst_binds `AndMonoBinds`
- cls_binds `AndMonoBinds`
+ cls_dm_binds `AndMonoBinds`
const_inst_binds `AndMonoBinds`
foe_binds
in
zonkForeignExports foe_decls `thenNF_Tc` \ foe_decls' ->
zonkRules rules `thenNF_Tc` \ rules' ->
- let
- thin_air_ids = map (explicitLookupValueByKey really_final_env . nameUnique) thinAirIdNames
- -- When looking up the thin-air names we must use
- -- a global env that includes the zonked locally-defined Ids too
- -- Hence using really_final_env
- in
returnTc (really_final_env,
(TcResults { tc_binds = all_binds',
tc_tycons = local_tycons,
tc_insts = inst_info,
tc_fords = foi_decls ++ foe_decls',
tc_rules = rules',
- tc_env = really_final_env,
- tc_thinair = thin_air_ids
+ tc_env = really_final_env
}))
- )
-- End of outer fix loop
) `thenTc` \ (final_env, stuff) ->
\begin{code}
noMainErr
= hsep [ptext SLIT("Module"), quotes (pprModuleName mAIN_Name),
- ptext SLIT("must include a definition for"), quotes (ppr main_NAME)]
+ ptext SLIT("must include a definition for"), quotes (ptext SLIT("main"))]
\end{code}
projects / ghc-hetmet.git / blobdiff