%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[TcModule]{Typechecking a whole module}
\begin{code}
-#include "HsVersions.h"
-
module TcModule (
- typecheckModule,
- SYN_IE(TcResults),
- SYN_IE(TcSpecialiseRequests),
- SYN_IE(TcDDumpDeriv)
+ typecheckModule, typecheckExpr, TcResults(..)
) where
-IMP_Ubiq(){-uitous-}
+#include "HsVersions.h"
-import HsSyn ( HsDecl(..), HsModule(..), HsBinds(..), HsExpr, MonoBinds(..),
- TyDecl, SpecDataSig, ClassDecl, InstDecl, IfaceSig,
- SpecInstSig, DefaultDecl, Sig, Fake, InPat,
- SYN_IE(RecFlag), nonRecursive, GRHSsAndBinds, Match,
- FixityDecl, IE, ImportDecl
+import CmdLineOpts ( DynFlag(..), DynFlags, opt_PprStyle_Debug )
+import HsSyn ( HsBinds(..), MonoBinds(..), HsDecl(..),
+ isIfaceRuleDecl, nullBinds, andMonoBindList
+ )
+import HsTypes ( toHsType )
+import RnHsSyn ( RenamedHsBinds, RenamedHsDecl, RenamedHsExpr )
+import TcHsSyn ( TypecheckedMonoBinds, TypecheckedHsExpr,
+ TypecheckedForeignDecl, TypecheckedRuleDecl,
+ zonkTopBinds, zonkForeignExports, zonkRules, mkHsLet
)
-import RnHsSyn ( SYN_IE(RenamedHsModule), RenamedFixityDecl(..) )
-import TcHsSyn ( SYN_IE(TypecheckedHsBinds), SYN_IE(TypecheckedHsExpr),
- SYN_IE(TypecheckedDictBinds), SYN_IE(TcMonoBinds),
- SYN_IE(TypecheckedMonoBinds),
- TcIdOcc(..), zonkTopBinds )
+
import TcMonad
-import Inst ( Inst, emptyLIE, plusLIE )
-import TcBinds ( tcBindsAndThen )
+import TcType ( newTyVarTy )
+import Inst ( plusLIE )
+import TcBinds ( tcTopBinds )
import TcClassDcl ( tcClassDecls2 )
import TcDefaults ( tcDefaults )
-import TcEnv ( tcExtendGlobalValEnv, getEnv_LocalIds,
- getEnv_TyCons, getEnv_Classes, tcLookupLocalValue,
- tcLookupLocalValueByKey, tcLookupTyCon,
- tcLookupGlobalValueByKeyMaybe )
-import SpecEnv ( SpecEnv )
-import TcExpr ( tcId )
+import TcExpr ( tcMonoExpr )
+import TcEnv ( TcEnv, InstInfo(iDFunId), tcExtendGlobalValEnv,
+ isLocalThing, tcSetEnv, tcSetInstEnv, initTcEnv, getTcGEnv
+ )
+import TcRules ( tcIfaceRules, tcSourceRules )
+import TcForeign ( tcForeignImports, tcForeignExports )
import TcIfaceSig ( tcInterfaceSigs )
import TcInstDcls ( tcInstDecls1, tcInstDecls2 )
-import TcInstUtil ( buildInstanceEnvs, InstInfo )
import TcSimplify ( tcSimplifyTop )
-import TcTyClsDecls ( tcTyAndClassDecls1 )
-import TcTyDecls ( mkDataBinds )
-import TcType ( SYN_IE(TcType), tcInstType )
-import TcKind ( TcKind )
-
-import RnMonad ( RnNameSupply(..) )
-import Bag ( listToBag )
-import ErrUtils ( SYN_IE(Warning), SYN_IE(Error) )
-import Id ( idType, GenId, SYN_IE(IdEnv), nullIdEnv )
-import Maybes ( catMaybes, MaybeErr )
-import Name ( Name, isLocallyDefined, pprModule )
-import Pretty
-import TyCon ( TyCon, isSynTyCon )
-import Class ( GenClass, SYN_IE(Class), classSelIds )
-import Type ( applyTyCon, mkSynTy, SYN_IE(Type) )
-import PprType ( GenType, GenTyVar )
-import TysWiredIn ( unitTy )
-import PrelMods ( gHC_MAIN, mAIN )
-import PrelInfo ( main_NAME, mainPrimIO_NAME, ioTyCon_NAME, primIoTyCon_NAME )
-import TyVar ( GenTyVar, SYN_IE(TyVarEnv), nullTyVarEnv )
-import Unify ( unifyTauTy )
-import UniqFM ( lookupUFM_Directly, lookupWithDefaultUFM_Directly,
- filterUFM, eltsUFM )
-import Unique ( Unique )
-import UniqSupply ( UniqSupply )
+import TcTyClsDecls ( tcTyAndClassDecls )
+
+import CoreUnfold ( unfoldingTemplate, hasUnfolding )
+import Type ( funResultTy, splitForAllTys, openTypeKind )
+import Bag ( isEmptyBag )
+import ErrUtils ( printErrorsAndWarnings, dumpIfSet_dyn, showPass )
+import Id ( idType, idUnfolding )
+import Module ( Module )
+import Name ( Name, toRdrName )
+import Name ( nameEnvElts, lookupNameEnv )
+import TyCon ( tyConGenInfo )
import Util
-import Bag ( Bag, isEmptyBag )
-
-import FiniteMap ( emptyFM, FiniteMap )
-
-import Outputable ( Outputable(..), PprStyle )
-
-tycon_specs = emptyFM
+import BasicTypes ( EP(..), Fixity )
+import Bag ( isEmptyBag )
+import Outputable
+import HscTypes ( PersistentCompilerState(..), HomeSymbolTable,
+ PackageTypeEnv, DFunId, ModIface(..),
+ TypeEnv, extendTypeEnvList,
+ TyThing(..), implicitTyThingIds,
+ mkTypeEnv
+ )
\end{code}
Outside-world interface:
\begin{code}
---ToDo: put this in HsVersions
-#if __GLASGOW_HASKELL__ >= 200
-# define REAL_WORLD RealWorld
-#else
-# define REAL_WORLD _RealWorld
-#endif
-
-- Convenient type synonyms first:
-type TcResults
- = (TypecheckedMonoBinds,
- [TyCon], [Class],
- Bag InstInfo, -- Instance declaration information
- TcSpecialiseRequests,
- TcDDumpDeriv)
+data TcResults
+ = TcResults {
+ -- All these fields have info *just for this module*
+ tc_env :: TypeEnv, -- The top level TypeEnv
+ tc_insts :: [DFunId], -- Instances
+ tc_binds :: TypecheckedMonoBinds, -- Bindings
+ tc_fords :: [TypecheckedForeignDecl], -- Foreign import & exports.
+ tc_rules :: [TypecheckedRuleDecl] -- Transformation rules
+ }
-type TcSpecialiseRequests
- = FiniteMap TyCon [(Bool, [Maybe Type])]
- -- source tycon specialisation requests
+---------------
+typecheckModule
+ :: DynFlags
+ -> PersistentCompilerState
+ -> HomeSymbolTable
+ -> ModIface -- Iface for this module
+ -> PrintUnqualified -- For error printing
+ -> [RenamedHsDecl]
+ -> IO (Maybe (PersistentCompilerState, TcResults))
+ -- The new PCS is Augmented with imported information,
+ -- (but not stuff from this module)
+
+
+typecheckModule dflags pcs hst mod_iface unqual decls
+ = do { maybe_tc_result <- typecheck dflags pcs hst unqual $
+ tcModule pcs hst get_fixity this_mod decls
+ ; printTcDump dflags maybe_tc_result
+ ; return maybe_tc_result }
+ where
+ this_mod = mi_module mod_iface
+ fixity_env = mi_fixities mod_iface
-type TcDDumpDeriv
- = PprStyle -> Doc
+ get_fixity :: Name -> Maybe Fixity
+ get_fixity nm = lookupNameEnv fixity_env nm
---------------
-typecheckModule
- :: UniqSupply
- -> RnNameSupply
- -> RenamedHsModule
- -> MaybeErr
- (TcResults, -- if all goes well...
- Bag Warning) -- (we can still get warnings)
- (Bag Error, -- if we had errors...
- Bag Warning)
-
-typecheckModule us rn_name_supply mod
- = initTc us (tcModule rn_name_supply mod)
+typecheckExpr :: DynFlags
+ -> PersistentCompilerState
+ -> HomeSymbolTable
+ -> PrintUnqualified -- For error printing
+ -> Module
+ -> (RenamedHsExpr, -- The expression itself
+ [RenamedHsDecl]) -- Plus extra decls it sucked in from interface files
+ -> IO (Maybe (PersistentCompilerState, TypecheckedHsExpr))
+
+typecheckExpr dflags pcs hst unqual this_mod (expr, decls)
+ = typecheck dflags pcs hst unqual $
+
+ tcImports pcs hst get_fixity this_mod decls `thenTc` \ (env, new_pcs, local_inst_info, deriv_binds, local_rules) ->
+ ASSERT( null local_inst_info && nullBinds deriv_binds && null local_rules )
+
+ tcSetEnv env $
+ newTyVarTy openTypeKind `thenTc` \ ty ->
+ tcMonoExpr expr ty `thenTc` \ (expr', lie) ->
+ tcSimplifyTop lie `thenTc` \ binds ->
+ returnTc (new_pcs, mkHsLet binds expr')
+ where
+ get_fixity :: Name -> Maybe Fixity
+ get_fixity n = pprPanic "typecheckExpr" (ppr n)
+
+---------------
+typecheck :: DynFlags
+ -> PersistentCompilerState
+ -> HomeSymbolTable
+ -> PrintUnqualified -- For error printing
+ -> TcM r
+ -> IO (Maybe r)
+
+typecheck dflags pcs hst unqual thing_inside
+ = do { showPass dflags "Typechecker";
+ ; env <- initTcEnv hst (pcs_PTE pcs)
+
+ ; (maybe_tc_result, (warns,errs)) <- initTc dflags env thing_inside
+
+ ; printErrorsAndWarnings unqual (errs,warns)
+
+ ; if isEmptyBag errs then
+ return maybe_tc_result
+ else
+ return Nothing
+ }
\end{code}
The internal monster:
\begin{code}
-tcModule :: RnNameSupply -- for renaming derivings
- -> RenamedHsModule -- input
- -> TcM s TcResults -- output
-
-tcModule rn_name_supply
- (HsModule mod_name verion exports imports fixities decls src_loc)
- = tcAddSrcLoc src_loc $ -- record where we're starting
-
- fixTc (\ ~(unf_env ,_) ->
- -- unf_env is used for type-checking interface pragmas
- -- which is done lazily [ie failure just drops the pragma
- -- without having any global-failure effect].
- --
- -- unf_env is also used to get the pragam info for dfuns.
-
- -- The knot for instance information. This isn't used at all
- -- till we type-check value declarations
- fixTc ( \ ~(rec_inst_mapper, _, _, _, _) ->
+tcModule :: PersistentCompilerState
+ -> HomeSymbolTable
+ -> (Name -> Maybe Fixity)
+ -> Module
+ -> [RenamedHsDecl]
+ -> TcM (PersistentCompilerState, TcResults)
+
+tcModule pcs hst get_fixity this_mod decls
+ = -- Type-check the type and class decls, and all imported decls
+ tcImports pcs hst get_fixity this_mod decls `thenTc` \ (env, new_pcs, local_inst_info, deriv_binds, local_rules) ->
+
+ tcSetEnv env $
+
+ -- Foreign import declarations next
+-- traceTc (text "Tc4") `thenNF_Tc_`
+ tcForeignImports decls `thenTc` \ (fo_ids, foi_decls) ->
+ tcExtendGlobalValEnv fo_ids $
- -- Type-check the type and class decls
- -- trace "tcTyAndClassDecls:" $
- tcTyAndClassDecls1 unf_env rec_inst_mapper decls `thenTc` \ env ->
+ -- Default declarations
+ tcDefaults decls `thenTc` \ defaulting_tys ->
+ tcSetDefaultTys defaulting_tys $
+
+ -- Value declarations next.
+ -- We also typecheck any extra binds that came out of the "deriving" process
+-- traceTc (text "Tc5") `thenNF_Tc_`
+ tcTopBinds (val_binds `ThenBinds` deriv_binds) `thenTc` \ ((val_binds, env), lie_valdecls) ->
+ tcSetEnv env $
- -- trace "tc3" $
- -- Typecheck the instance decls, includes deriving
- tcSetEnv env (
- -- trace "tcInstDecls:" $
- tcInstDecls1 unf_env decls mod_name rn_name_supply
- ) `thenTc` \ (inst_info, deriv_binds, ddump_deriv) ->
+ -- Foreign export declarations next
+-- traceTc (text "Tc6") `thenNF_Tc_`
+ tcForeignExports decls `thenTc` \ (lie_fodecls, foe_binds, foe_decls) ->
- -- trace "tc4" $
- buildInstanceEnvs inst_info `thenTc` \ inst_mapper ->
+ -- Second pass over class and instance declarations,
+ -- to compile the bindings themselves.
+ tcInstDecls2 local_inst_info `thenNF_Tc` \ (lie_instdecls, inst_binds) ->
+ tcClassDecls2 this_mod tycl_decls `thenNF_Tc` \ (lie_clasdecls, cls_dm_binds) ->
+ tcSourceRules source_rules `thenNF_Tc` \ (lie_rules, more_local_rules) ->
- returnTc (inst_mapper, env, inst_info, deriv_binds, ddump_deriv)
+ -- Deal with constant or ambiguous InstIds. How could
+ -- there be ambiguous ones? They can only arise if a
+ -- top-level decl falls under the monomorphism
+ -- restriction, and no subsequent decl instantiates its
+ -- type. (Usually, ambiguous type variables are resolved
+ -- during the generalisation step.)
+ let
+ lie_alldecls = lie_valdecls `plusLIE`
+ lie_instdecls `plusLIE`
+ lie_clasdecls `plusLIE`
+ lie_fodecls `plusLIE`
+ lie_rules
+ in
+ tcSimplifyTop lie_alldecls `thenTc` \ const_inst_binds ->
- -- End of inner fix loop
- ) `thenTc` \ (_, env, inst_info, deriv_binds, ddump_deriv) ->
+ -- Backsubstitution. This must be done last.
+ -- Even tcSimplifyTop may do some unification.
+ let
+ all_binds = val_binds `AndMonoBinds`
+ inst_binds `AndMonoBinds`
+ cls_dm_binds `AndMonoBinds`
+ const_inst_binds `AndMonoBinds`
+ foe_binds
+ in
+-- traceTc (text "Tc9") `thenNF_Tc_`
+ zonkTopBinds all_binds `thenNF_Tc` \ (all_binds', final_env) ->
+ tcSetEnv final_env $
+ -- zonkTopBinds puts all the top-level Ids into the tcGEnv
+ zonkForeignExports foe_decls `thenNF_Tc` \ foe_decls' ->
+ zonkRules more_local_rules `thenNF_Tc` \ more_local_rules' ->
- -- trace "tc5" $
- tcSetEnv env $
-
- -- Default declarations
- tcDefaults decls `thenTc` \ defaulting_tys ->
- tcSetDefaultTys defaulting_tys $
-
- -- Create any necessary record selector Ids and their bindings
- -- "Necessary" includes data and newtype declarations
- let
- tycons = getEnv_TyCons env
- classes = getEnv_Classes env
- in
- mkDataBinds tycons `thenTc` \ (data_ids, data_binds) ->
-
- -- Extend the global value environment with
- -- (a) constructors
- -- (b) record selectors
- -- (c) class op selectors
- -- (d) default-method ids
- tcExtendGlobalValEnv data_ids $
- tcExtendGlobalValEnv (concat (map classSelIds classes)) $
-
-
- -- 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 $
-
+
+ let local_things = filter (isLocalThing this_mod) (nameEnvElts (getTcGEnv final_env))
+
+ -- Create any necessary "implicit" bindings (data constructors etc)
+ -- Should we create bindings for dictionary constructors?
+ -- They are always fully applied, and the bindings are just there
+ -- to support partial applications. But it's easier to let them through.
+ implicit_binds = andMonoBindList [ CoreMonoBind id (unfoldingTemplate unf)
+ | id <- implicitTyThingIds local_things
+ , let unf = idUnfolding id
+ , hasUnfolding unf
+ ]
+
+ local_type_env :: TypeEnv
+ local_type_env = mkTypeEnv local_things
+
+ all_local_rules = local_rules ++ more_local_rules'
+ in
+-- traceTc (text "Tc10") `thenNF_Tc_`
+ returnTc (new_pcs,
+ TcResults { tc_env = local_type_env,
+ tc_binds = implicit_binds `AndMonoBinds` all_binds',
+ tc_insts = map iDFunId local_inst_info,
+ tc_fords = foi_decls ++ foe_decls',
+ tc_rules = all_local_rules
+ }
+ )
+ where
+ tycl_decls = [d | TyClD d <- decls]
+ val_binds = foldr ThenBinds EmptyBinds [binds | ValD binds <- decls]
+ source_rules = [d | RuleD d <- decls, not (isIfaceRuleDecl d)]
+\end{code}
- -- Value declarations next.
- -- We also typecheck any extra binds that came out of the "deriving" process
- -- trace "tcBinds:" $
- tcBindsAndThen
- (\ is_rec binds1 (binds2, thing) -> (binds1 `AndMonoBinds` binds2, thing))
- (get_val_decls decls `ThenBinds` deriv_binds)
- ( tcGetEnv `thenNF_Tc` \ env ->
- returnTc ((EmptyMonoBinds, env), emptyLIE)
- ) `thenTc` \ ((val_binds, final_env), lie_valdecls) ->
- tcSetEnv final_env $
-
-
- -- Second pass over class and instance declarations,
- -- to compile the bindings themselves.
- -- trace "tc8" $
- tcInstDecls2 inst_info `thenNF_Tc` \ (lie_instdecls, inst_binds) ->
- tcClassDecls2 decls `thenNF_Tc` \ (lie_clasdecls, cls_binds) ->
-
-
-
- -- 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
- -- top-level decl falls under the monomorphism
- -- restriction, and no subsequent decl instantiates its
- -- type. (Usually, ambiguous type variables are resolved
- -- during the generalisation step.)
- -- trace "tc9" $
- let
- lie_alldecls = lie_valdecls `plusLIE` lie_instdecls `plusLIE` lie_clasdecls
- in
- tcSimplifyTop lie_alldecls `thenTc` \ const_inst_binds ->
+\begin{code}
+tcImports :: PersistentCompilerState
+ -> HomeSymbolTable
+ -> (Name -> Maybe Fixity)
+ -> Module
+ -> [RenamedHsDecl]
+ -> TcM (TcEnv, PersistentCompilerState,
+ [InstInfo], RenamedHsBinds, [TypecheckedRuleDecl])
+
+-- tcImports is a slight mis-nomer.
+-- It deals with everythign that could be an import:
+-- type and class decls
+-- interface signatures
+-- instance decls
+-- rule decls
+-- These can occur in source code too, of course
+
+tcImports pcs hst get_fixity this_mod decls
+ = fixTc (\ ~(unf_env, _, _, _, _) ->
+ -- (unf_env :: RecTcEnv) is used for type-checking interface pragmas
+ -- which is done lazily [ie failure just drops the pragma
+ -- without having any global-failure effect].
+ --
+ -- unf_env is also used to get the pragama info
+ -- for imported dfuns and default methods
+
+-- traceTc (text "Tc1") `thenNF_Tc_`
+ tcTyAndClassDecls unf_env tycl_decls `thenTc` \ env ->
+ tcSetEnv env $
+
+ -- Typecheck the instance decls, includes deriving
+-- traceTc (text "Tc2") `thenNF_Tc_`
+ tcInstDecls1 (pcs_insts pcs) (pcs_PRS pcs)
+ hst unf_env get_fixity this_mod
+ decls `thenTc` \ (new_pcs_insts, inst_env, local_inst_info, deriv_binds) ->
+ tcSetInstEnv inst_env $
+
+ -- 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
+-- traceTc (text "Tc3") `thenNF_Tc_`
+ tcInterfaceSigs unf_env tycl_decls `thenTc` \ sig_ids ->
+ tcExtendGlobalValEnv sig_ids $
+
+
+ tcIfaceRules (pcs_rules pcs) this_mod iface_rules `thenNF_Tc` \ (new_pcs_rules, local_rules) ->
- -- Backsubstitution. This must be done last.
- -- Even tcCheckMainSig and tcSimplifyTop may do some unification.
+ tcGetEnv `thenTc` \ unf_env ->
let
- all_binds = data_binds `AndMonoBinds`
- val_binds `AndMonoBinds`
- inst_binds `AndMonoBinds`
- cls_binds `AndMonoBinds`
- const_inst_binds
+ imported_things = filter (not . isLocalThing this_mod) (nameEnvElts (getTcGEnv unf_env))
+
+ new_pte :: PackageTypeEnv
+ new_pte = extendTypeEnvList (pcs_PTE pcs) imported_things
+
+ new_pcs :: PersistentCompilerState
+ new_pcs = pcs { pcs_PTE = new_pte,
+ pcs_insts = new_pcs_insts,
+ pcs_rules = new_pcs_rules
+ }
in
- zonkTopBinds all_binds `thenNF_Tc` \ (all_binds', really_final_env) ->
-
- returnTc (really_final_env, (all_binds', inst_info, ddump_deriv))
-
- -- End of outer fix loop
- ) `thenTc` \ (final_env, (all_binds', inst_info, ddump_deriv)) ->
-
-
- let
- tycons = getEnv_TyCons final_env
- classes = getEnv_Classes final_env
-
- local_tycons = filter isLocallyDefined tycons
- local_classes = filter isLocallyDefined classes
- in
- -- FINISHED AT LAST
- returnTc (
- all_binds',
-
- local_tycons, local_classes, inst_info, tycon_specs,
-
- ddump_deriv
+ returnTc (unf_env, new_pcs, local_inst_info, deriv_binds, local_rules)
)
+ where
+ tycl_decls = [d | TyClD d <- decls]
+ iface_rules = [d | RuleD d <- decls, isIfaceRuleDecl d]
+\end{code}
-get_val_decls decls = foldr ThenBinds EmptyBinds [binds | ValD binds <- decls]
-\end{code}
-
+%************************************************************************
+%* *
+\subsection{Dumping output}
+%* *
+%************************************************************************
\begin{code}
-tcCheckMainSig mod_name
- | not is_main && not is_ghc_main
- = returnTc () -- A non-main module
-
- | otherwise
- = -- Check that main is defined
- tcLookupTyCon tycon_name `thenTc` \ (_,_,tycon) ->
- tcLookupLocalValue main_name `thenNF_Tc` \ maybe_main_id ->
- case maybe_main_id of {
- Nothing -> failTc (noMainErr mod_name main_name);
- Just main_id ->
-
- -- Check that it has the right type (or a more general one)
- let
- expected_ty | isSynTyCon tycon = mkSynTy tycon [unitTy]
- | otherwise = applyTyCon tycon [unitTy]
- -- This is bizarre. There ought to be a suitable function in Type.lhs!
- in
- tcInstType [] expected_ty `thenNF_Tc` \ expected_tau ->
- tcId main_name `thenNF_Tc` \ (_, lie, main_tau) ->
- tcSetErrCtxt (mainTyCheckCtxt main_name) $
- unifyTauTy expected_tau
- main_tau `thenTc_`
- checkTc (isEmptyBag lie) (mainTyMisMatch main_name expected_ty (idType main_id))
- }
+printTcDump dflags Nothing = return ()
+printTcDump dflags (Just (_, results))
+ = do dumpIfSet_dyn dflags Opt_D_dump_types
+ "Type signatures" (dump_sigs results)
+ dumpIfSet_dyn dflags Opt_D_dump_tc
+ "Typechecked" (dump_tc results)
+
+dump_tc results
+ = vcat [ppr (tc_binds results),
+ pp_rules (tc_rules results),
+ ppr_gen_tycons [tc | ATyCon tc <- nameEnvElts (tc_env 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))
+ | AnId id <- nameEnvElts (tc_env results),
+ want_sig id
+ ]
where
- is_main = mod_name == mAIN
- is_ghc_main = mod_name == gHC_MAIN
+ lt_sig (n1,_) (n2,_) = n1 < n2
+ ppr_sig (n,t) = ppr n <+> dcolon <+> ppr t
+
+ want_sig id | opt_PprStyle_Debug = True
+ | otherwise = True -- For now
- main_name | is_main = main_NAME
- | otherwise = mainPrimIO_NAME
+ppr_gen_tycons tcs = vcat [ptext SLIT("{-# Generic type constructor details"),
+ vcat (map ppr_gen_tycon tcs),
+ ptext SLIT("#-}")
+ ]
- tycon_name | is_main = ioTyCon_NAME
- | otherwise = primIoTyCon_NAME
+-- x&y are now Id's, not CoreExpr's
+ppr_gen_tycon tycon
+ | Just ep <- tyConGenInfo tycon
+ = (ppr tycon <> colon) $$ nest 4 (ppr_ep ep)
-mainTyCheckCtxt main_name sty
- = hsep [ptext SLIT("When checking that"), ppr sty main_name, ptext SLIT("has the required type")]
+ | otherwise = ppr tycon <> colon <+> ptext SLIT("Not derivable")
-noMainErr mod_name main_name sty
- = hsep [ptext SLIT("Module"), pprModule sty mod_name,
- ptext SLIT("must include a definition for"), ppr sty main_name]
+ppr_ep (EP from to)
+ = vcat [ ptext SLIT("Rep type:") <+> ppr (funResultTy from_tau),
+ ptext SLIT("From:") <+> ppr (unfoldingTemplate (idUnfolding from)),
+ ptext SLIT("To:") <+> ppr (unfoldingTemplate (idUnfolding to))
+ ]
+ where
+ (_,from_tau) = splitForAllTys (idType from)
-mainTyMisMatch :: Name -> Type -> TcType s -> Error
-mainTyMisMatch main_name expected actual sty
- = hang (hsep [ppr sty main_name, ptext SLIT("has the wrong type")])
- 4 (vcat [
- hsep [ptext SLIT("Expected:"), ppr sty expected],
- hsep [ptext SLIT("Inferred:"), ppr sty actual]
- ])
+pp_rules [] = empty
+pp_rules rs = vcat [ptext SLIT("{-# RULES"),
+ nest 4 (vcat (map ppr rs)),
+ ptext SLIT("#-}")]
\end{code}
projects / ghc-hetmet.git / blobdiff