%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[RnSource]{Main pass of renamer}
\begin{code}
-#include "HsVersions.h"
-
-module RnSource ( rnSource, rnPolyType ) where
+module RnSource (
+ rnSrcDecls, checkModDeprec,
+ rnTyClDecl, rnIfaceRuleDecl, rnInstDecl,
+ rnBinds, rnBindsAndThen, rnStats,
+ ) where
-import Ubiq
-import RnLoop -- *check* the RnPass4/RnExpr4/RnBinds4 loop-breaking
+#include "HsVersions.h"
import HsSyn
-import HsPragmas
-import RdrHsSyn
+import RdrName ( RdrName, isRdrDataCon, elemRdrEnv )
+import RdrHsSyn ( RdrNameConDecl, RdrNameTyClDecl,
+ RdrNameDeprecation, RdrNameFixitySig,
+ RdrNameHsBinds,
+ extractGenericPatTyVars
+ )
import RnHsSyn
-import RnMonad
-import RnBinds ( rnTopBinds, rnMethodBinds )
-
+import HsCore
+import RnExpr ( rnExpr )
+import RnTypes ( rnHsType, rnHsSigType, rnHsTypeFVs, rnContext )
+
+import RnBinds ( rnTopMonoBinds, rnMonoBinds, rnMethodBinds,
+ rnMonoBindsAndThen, renameSigs, checkSigs )
+import RnEnv ( lookupTopBndrRn, lookupOccRn, lookupSysBndr,
+ newLocalsRn, lookupGlobalOccRn,
+ bindLocalsFV, bindPatSigTyVarsFV,
+ bindTyVarsRn, extendTyVarEnvFVRn,
+ bindCoreLocalRn, bindCoreLocalsRn, bindLocalNames,
+ checkDupOrQualNames, checkDupNames, mapFvRn,
+ lookupTopSrcBndr_maybe, lookupTopSrcBndr,
+ dataTcOccs, newIPName, unknownNameErr
+ )
+import TcRnMonad
+
+import BasicTypes ( FixitySig(..), TopLevelFlag(..) )
+import HscTypes ( ExternalPackageState(..), FixityEnv,
+ Deprecations(..), plusDeprecs )
+import Module ( moduleEnvElts )
+import Class ( FunDep, DefMeth (..) )
+import TyCon ( DataConDetails(..), visibleDataCons )
+import Name ( Name )
+import NameSet
+import NameEnv
+import ErrUtils ( dumpIfSet )
+import PrelNames ( newStablePtrName, bindIOName, returnIOName
+ -- dotnet interop
+ , objectTyConName,
+ , unmarshalObjectName, marshalObjectName
+ , unmarshalStringName, marshalStringName
+ , checkDotnetResName
+ )
+import List ( partition )
import Bag ( bagToList )
-import Class ( derivableClassKeys )
-import ListSetOps ( unionLists, minusList )
-import Maybes ( maybeToBool, catMaybes )
-import Name ( isLocallyDefined, isAvarid, getLocalName, ExportFlag(..), RdrName )
-import Pretty
+import Outputable
import SrcLoc ( SrcLoc )
-import Unique ( Unique )
-import UniqFM ( addListToUFM, listToUFM )
-import UniqSet ( UniqSet(..) )
-import Util ( isn'tIn, panic, assertPanic )
-
-rnExports mods Nothing = returnRn (\n -> ExportAll)
-rnExports mods (Just exps) = returnRn (\n -> ExportAll)
+import CmdLineOpts ( DynFlag(..) )
+ -- Warn of unused for-all'd tyvars
+import Maybes ( maybeToBool, seqMaybe )
+import Maybe ( maybe, catMaybes, isNothing )
\end{code}
-rnSource `renames' the source module and export list.
+@rnSourceDecl@ `renames' declarations.
It simultaneously performs dependency analysis and precedence parsing.
It also does the following error checks:
\begin{enumerate}
\item
Checks that tyvars are used properly. This includes checking
for undefined tyvars, and tyvars in contexts that are ambiguous.
+(Some of this checking has now been moved to module @TcMonoType@,
+since we don't have functional dependency information at this point.)
\item
Checks that all variable occurences are defined.
\item
-Checks the (..) etc constraints in the export list.
+Checks the @(..)@ etc constraints in the export list.
\end{enumerate}
\begin{code}
-rnSource :: [Module] -- imported modules
- -> Bag RenamedFixityDecl -- fixity info for imported names
- -> RdrNameHsModule
- -> RnM s (RenamedHsModule,
- Name -> ExportFlag, -- export info
- Bag (RnName, RdrName)) -- occurrence info
-
-rnSource imp_mods imp_fixes (HsModule mod version exports _ fixes
- ty_decls specdata_sigs class_decls
- inst_decls specinst_sigs defaults
- binds _ src_loc)
-
- = pushSrcLocRn src_loc $
-
- rnExports (mod:imp_mods) exports `thenRn` \ exported_fn ->
- rnFixes fixes `thenRn` \ src_fixes ->
- let
- pair_name inf@(InfixL n _) = (n, inf)
- pair_name inf@(InfixR n _) = (n, inf)
- pair_name inf@(InfixN n _) = (n, inf)
+rnSrcDecls :: HsGroup RdrName -> RnM (TcGblEnv, HsGroup Name, DefUses)
+
+rnSrcDecls (HsGroup { hs_valds = MonoBind binds sigs _,
+ hs_tyclds = tycl_decls,
+ hs_instds = inst_decls,
+ hs_fixds = fix_decls,
+ hs_depds = deprec_decls,
+ hs_fords = foreign_decls,
+ hs_defds = default_decls,
+ hs_ruleds = rule_decls,
+ hs_coreds = core_decls })
+
+ = do { -- Deal with deprecations (returns only the extra deprecations)
+ deprecs <- rnSrcDeprecDecls deprec_decls ;
+ updGblEnv (\gbl -> gbl { tcg_deprecs = tcg_deprecs gbl `plusDeprecs` deprecs })
+ $ do {
+
+ -- Deal with top-level fixity decls
+ -- (returns the total new fixity env)
+ fix_env <- rnSrcFixityDecls fix_decls ;
+ updGblEnv (\gbl -> gbl { tcg_fix_env = fix_env })
+ $ do {
+
+ -- Rename other declarations
+ (rn_val_decls, bind_dus) <- rnTopMonoBinds binds sigs ;
+
+ -- You might think that we could build proper def/use information
+ -- for type and class declarations, but they can be involved
+ -- in mutual recursion across modules, and we only do the SCC
+ -- analysis for them in the type checker.
+ -- So we content ourselves with gathering uses only; that
+ -- means we'll only report a declaration as unused if it isn't
+ -- mentioned at all. Ah well.
+ (rn_tycl_decls, src_fvs1) <- mapFvRn rnSrcTyClDecl tycl_decls ;
+ (rn_inst_decls, src_fvs2) <- mapFvRn rnSrcInstDecl inst_decls ;
+ (rn_rule_decls, src_fvs3) <- mapFvRn rnHsRuleDecl rule_decls ;
+ (rn_foreign_decls, src_fvs4) <- mapFvRn rnHsForeignDecl foreign_decls ;
+ (rn_default_decls, src_fvs5) <- mapFvRn rnDefaultDecl default_decls ;
+ (rn_core_decls, src_fvs6) <- mapFvRn rnCoreDecl core_decls ;
+
+ let {
+ rn_group = HsGroup { hs_valds = rn_val_decls,
+ hs_tyclds = rn_tycl_decls,
+ hs_instds = rn_inst_decls,
+ hs_fixds = [],
+ hs_depds = [],
+ hs_fords = rn_foreign_decls,
+ hs_defds = rn_default_decls,
+ hs_ruleds = rn_rule_decls,
+ hs_coreds = rn_core_decls } ;
+
+ other_fvs = plusFVs [src_fvs1, src_fvs2, src_fvs3,
+ src_fvs4, src_fvs5, src_fvs6] ;
+ src_dus = bind_dus `plusDU` usesOnly other_fvs
+ } ;
+
+ tcg_env <- getGblEnv ;
+ return (tcg_env, rn_group, src_dus)
+ }}}
+\end{code}
- imp_fixes_fm = listToUFM (map pair_name (bagToList imp_fixes))
- all_fixes_fm = addListToUFM imp_fixes_fm (map pair_name src_fixes)
- in
- setExtraRn all_fixes_fm $
-
- mapRn rnTyDecl ty_decls `thenRn` \ new_ty_decls ->
- mapRn rnSpecDataSig specdata_sigs `thenRn` \ new_specdata_sigs ->
- mapRn rnClassDecl class_decls `thenRn` \ new_class_decls ->
- mapRn rnInstDecl inst_decls `thenRn` \ new_inst_decls ->
- mapRn rnSpecInstSig specinst_sigs `thenRn` \ new_specinst_sigs ->
- rnDefaultDecl defaults `thenRn` \ new_defaults ->
- rnTopBinds binds `thenRn` \ new_binds ->
-
- getOccurrenceUpRn `thenRn` \ occ_info ->
-
- returnRn (
- HsModule mod version
- trashed_exports trashed_imports src_fixes
- new_ty_decls new_specdata_sigs new_class_decls
- new_inst_decls new_specinst_sigs new_defaults
- new_binds [] src_loc,
- exported_fn,
- occ_info
- )
+
+%*********************************************************
+%* *
+ Source-code fixity declarations
+%* *
+%*********************************************************
+
+\begin{code}
+rnSrcFixityDecls :: [RdrNameFixitySig] -> TcRn m FixityEnv
+rnSrcFixityDecls fix_decls
+ = getGblEnv `thenM` \ gbl_env ->
+ foldlM rnFixityDecl (tcg_fix_env gbl_env)
+ fix_decls `thenM` \ fix_env ->
+ traceRn (text "fixity env" <+> ppr fix_env) `thenM_`
+ returnM fix_env
+
+rnFixityDecl :: FixityEnv -> RdrNameFixitySig -> TcRn m FixityEnv
+rnFixityDecl fix_env (FixitySig rdr_name fixity loc)
+ = -- GHC extension: look up both the tycon and data con
+ -- for con-like things
+ -- If neither are in scope, report an error; otherwise
+ -- add both to the fixity env
+ mappM lookupTopSrcBndr_maybe (dataTcOccs rdr_name) `thenM` \ maybe_ns ->
+ case catMaybes maybe_ns of
+ [] -> addSrcLoc loc $
+ addErr (unknownNameErr rdr_name) `thenM_`
+ returnM fix_env
+ ns -> foldlM add fix_env ns
where
- trashed_exports = trace "rnSource:trashed_exports" Nothing
- trashed_imports = trace "rnSource:trashed_imports" []
+ add fix_env name
+ = case lookupNameEnv fix_env name of
+ Just (FixitySig _ _ loc') -> addErr (dupFixityDecl rdr_name loc loc') `thenM_`
+ returnM fix_env
+ Nothing -> returnM (extendNameEnv fix_env name (FixitySig name fixity loc))
+
+dupFixityDecl rdr_name loc1 loc2
+ = vcat [ptext SLIT("Multiple fixity declarations for") <+> quotes (ppr rdr_name),
+ ptext SLIT("at ") <+> ppr loc1,
+ ptext SLIT("and") <+> ppr loc2]
\end{code}
+
%*********************************************************
-%* *
-\subsection{Type declarations}
-%* *
+%* *
+ Source-code deprecations declarations
+%* *
%*********************************************************
-@rnTyDecl@ uses the `global name function' to create a new type
-declaration in which local names have been replaced by their original
-names, reporting any unknown names.
-
-Renaming type variables is a pain. Because they now contain uniques,
-it is necessary to pass in an association list which maps a parsed
-tyvar to its Name representation. In some cases (type signatures of
-values), it is even necessary to go over the type first in order to
-get the set of tyvars used by it, make an assoc list, and then go over
-it again to rename the tyvars! However, we can also do some scoping
-checks at the same time.
+For deprecations, all we do is check that the names are in scope.
+It's only imported deprecations, dealt with in RnIfaces, that we
+gather them together.
\begin{code}
-rnTyDecl :: RdrNameTyDecl -> RnM_Fixes s RenamedTyDecl
-
-rnTyDecl (TyData context tycon tyvars condecls derivings pragmas src_loc)
- = pushSrcLocRn src_loc $
- lookupTyCon tycon `thenRn` \ tycon' ->
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env, tyvars') ->
- rnContext tv_env context `thenRn` \ context' ->
- rnConDecls tv_env condecls `thenRn` \ condecls' ->
- rn_derivs tycon' src_loc derivings `thenRn` \ derivings' ->
- ASSERT(isNoDataPragmas pragmas)
- returnRn (TyData context' tycon' tyvars' condecls' derivings' noDataPragmas src_loc)
-
-rnTyDecl (TyNew context tycon tyvars condecl derivings pragmas src_loc)
- = pushSrcLocRn src_loc $
- lookupTyCon tycon `thenRn` \ tycon' ->
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env, tyvars') ->
- rnContext tv_env context `thenRn` \ context' ->
- rnConDecls tv_env condecl `thenRn` \ condecl' ->
- rn_derivs tycon' src_loc derivings `thenRn` \ derivings' ->
- ASSERT(isNoDataPragmas pragmas)
- returnRn (TyNew context' tycon' tyvars' condecl' derivings' noDataPragmas src_loc)
-
-rnTyDecl (TySynonym name tyvars ty src_loc)
- = pushSrcLocRn src_loc $
- lookupTyCon name `thenRn` \ name' ->
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env, tyvars') ->
- rnMonoType tv_env ty `thenRn` \ ty' ->
- returnRn (TySynonym name' tyvars' ty' src_loc)
-
-rn_derivs tycon2 locn Nothing -- derivs not specified
- = returnRn Nothing
-
-rn_derivs tycon2 locn (Just ds)
- = mapRn (rn_deriv tycon2 locn) ds `thenRn` \ derivs ->
- returnRn (Just derivs)
- where
- rn_deriv tycon2 locn clas
- = lookupClass clas `thenRn` \ clas_name ->
- addErrIfRn (uniqueOf clas_name `not_elem` derivableClassKeys)
- (derivingNonStdClassErr clas locn)
- `thenRn_`
- returnRn clas_name
- where
- not_elem = isn'tIn "rn_deriv"
+rnSrcDeprecDecls :: [RdrNameDeprecation] -> TcRn m Deprecations
+rnSrcDeprecDecls []
+ = returnM NoDeprecs
+
+rnSrcDeprecDecls decls
+ = mappM rn_deprec decls `thenM` \ pairs ->
+ returnM (DeprecSome (mkNameEnv (catMaybes pairs)))
+ where
+ rn_deprec (Deprecation rdr_name txt loc)
+ = addSrcLoc loc $
+ lookupTopSrcBndr rdr_name `thenM` \ name ->
+ returnM (Just (name, (name,txt)))
+
+checkModDeprec :: Maybe DeprecTxt -> Deprecations
+-- Check for a module deprecation; done once at top level
+checkModDeprec Nothing = NoDeprecs
+checkModdeprec (Just txt) = DeprecAll txt
+
+badDeprec d
+ = sep [ptext SLIT("Illegal deprecation when whole module is deprecated"),
+ nest 4 (ppr d)]
\end{code}
-@rnConDecls@ uses the `global name function' to create a new
-constructor in which local names have been replaced by their original
-names, reporting any unknown names.
+%*********************************************************
+%* *
+\subsection{Source code declarations}
+%* *
+%*********************************************************
\begin{code}
-rnConDecls :: TyVarNamesEnv
- -> [RdrNameConDecl]
- -> RnM_Fixes s [RenamedConDecl]
+rnSrcTyClDecl tycl_decl
+ = rnTyClDecl tycl_decl `thenM` \ new_decl ->
+ finishSourceTyClDecl tycl_decl new_decl `thenM` \ (new_decl', fvs) ->
+ returnM (new_decl', fvs `plusFV` tyClDeclFVs new_decl')
+
+rnSrcInstDecl inst
+ = rnInstDecl inst `thenM` \ new_inst ->
+ finishSourceInstDecl inst new_inst `thenM` \ (new_inst', fvs) ->
+ returnM (new_inst', fvs `plusFV` instDeclFVs new_inst')
+
+rnDefaultDecl (DefaultDecl tys src_loc)
+ = addSrcLoc src_loc $
+ mapFvRn (rnHsTypeFVs doc_str) tys `thenM` \ (tys', fvs) ->
+ returnM (DefaultDecl tys' src_loc, fvs)
+ where
+ doc_str = text "In a `default' declaration"
+
-rnConDecls tv_env con_decls
- = mapRn rn_decl con_decls
+rnCoreDecl (CoreDecl name ty rhs loc)
+ = addSrcLoc loc $
+ lookupTopBndrRn name `thenM` \ name' ->
+ rnHsTypeFVs doc_str ty `thenM` \ (ty', ty_fvs) ->
+ rnCoreExpr rhs `thenM` \ rhs' ->
+ returnM (CoreDecl name' ty' rhs' loc,
+ ty_fvs `plusFV` ufExprFVs rhs')
where
- rn_decl (ConDecl name tys src_loc)
- = pushSrcLocRn src_loc $
- lookupValue name `thenRn` \ new_name ->
- mapRn rn_bang_ty tys `thenRn` \ new_tys ->
- returnRn (ConDecl new_name new_tys src_loc)
-
- rn_decl (ConOpDecl ty1 op ty2 src_loc)
- = pushSrcLocRn src_loc $
- lookupValue op `thenRn` \ new_op ->
- rn_bang_ty ty1 `thenRn` \ new_ty1 ->
- rn_bang_ty ty2 `thenRn` \ new_ty2 ->
- returnRn (ConOpDecl new_ty1 new_op new_ty2 src_loc)
-
- rn_decl (NewConDecl name ty src_loc)
- = pushSrcLocRn src_loc $
- lookupValue name `thenRn` \ new_name ->
- rn_mono_ty ty `thenRn` \ new_ty ->
- returnRn (NewConDecl new_name new_ty src_loc)
-
- rn_decl (RecConDecl con fields src_loc)
- = panic "rnConDecls:RecConDecl"
-
- ----------
- rn_mono_ty = rnMonoType tv_env
-
- rn_bang_ty (Banged ty)
- = rn_mono_ty ty `thenRn` \ new_ty ->
- returnRn (Banged new_ty)
- rn_bang_ty (Unbanged ty)
- = rn_mono_ty ty `thenRn` \ new_ty ->
- returnRn (Unbanged new_ty)
+ doc_str = text "In the Core declaration for" <+> quotes (ppr name)
\end{code}
%*********************************************************
%* *
-\subsection{SPECIALIZE data pragmas}
+ Bindings
%* *
%*********************************************************
+These chaps are here, rather than in TcBinds, so that there
+is just one hi-boot file (for RnSource). rnSrcDecls is part
+of the loop too, and it must be defined in this module.
+
\begin{code}
-rnSpecDataSig :: RdrNameSpecDataSig
- -> RnM_Fixes s RenamedSpecDataSig
+rnBinds :: RdrNameHsBinds -> RnM (RenamedHsBinds, DefUses)
+-- This version assumes that the binders are already in scope
+-- It's used only in 'mdo'
+rnBinds EmptyBinds = returnM (EmptyBinds, emptyDUs)
+rnBinds (MonoBind bind sigs _) = rnMonoBinds NotTopLevel bind sigs
+rnBinds b@(IPBinds bind _) = addErr (badIpBinds b) `thenM_`
+ returnM (EmptyBinds, emptyDUs)
+
+rnBindsAndThen :: RdrNameHsBinds
+ -> (RenamedHsBinds -> RnM (result, FreeVars))
+ -> RnM (result, FreeVars)
+-- This version (a) assumes that the binding vars are not already in scope
+-- (b) removes the binders from the free vars of the thing inside
+-- The parser doesn't produce ThenBinds
+rnBindsAndThen EmptyBinds thing_inside = thing_inside EmptyBinds
+rnBindsAndThen (MonoBind bind sigs _) thing_inside = rnMonoBindsAndThen bind sigs thing_inside
+rnBindsAndThen (IPBinds binds is_with) thing_inside
+ = warnIf is_with withWarning `thenM_`
+ rnIPBinds binds `thenM` \ (binds',fv_binds) ->
+ thing_inside (IPBinds binds' is_with) `thenM` \ (thing, fvs_thing) ->
+ returnM (thing, fvs_thing `plusFV` fv_binds)
+\end{code}
+
+
+%************************************************************************
+%* *
+\subsubsection{@rnIPBinds@s: in implicit parameter bindings} *
+%* *
+%************************************************************************
+
+\begin{code}
+rnIPBinds [] = returnM ([], emptyFVs)
+rnIPBinds ((n, expr) : binds)
+ = newIPName n `thenM` \ name ->
+ rnExpr expr `thenM` \ (expr',fvExpr) ->
+ rnIPBinds binds `thenM` \ (binds',fvBinds) ->
+ returnM ((name, expr') : binds', fvExpr `plusFV` fvBinds)
-rnSpecDataSig (SpecDataSig tycon ty src_loc)
- = pushSrcLocRn src_loc $
- let
- tyvars = extractMonoTyNames ty
- in
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env,_) ->
- lookupTyCon tycon `thenRn` \ tycon' ->
- rnMonoType tv_env ty `thenRn` \ ty' ->
- returnRn (SpecDataSig tycon' ty' src_loc)
\end{code}
+
%*********************************************************
%* *
-\subsection{Class declarations}
+\subsection{Foreign declarations}
%* *
%*********************************************************
-@rnClassDecl@ uses the `global name function' to create a new
-class declaration in which local names have been replaced by their
-original names, reporting any unknown names.
-
\begin{code}
-rnClassDecl :: RdrNameClassDecl -> RnM_Fixes s RenamedClassDecl
-
-rnClassDecl (ClassDecl context cname tyvar sigs mbinds pragmas src_loc)
- = pushSrcLocRn src_loc $
- mkTyVarNamesEnv src_loc [tyvar] `thenRn` \ (tv_env, [tyvar']) ->
- rnContext tv_env context `thenRn` \ context' ->
- lookupClass cname `thenRn` \ cname' ->
- mapRn (rn_op cname' tv_env) sigs `thenRn` \ sigs' ->
- rnMethodBinds cname' mbinds `thenRn` \ mbinds' ->
- ASSERT(isNoClassPragmas pragmas)
- returnRn (ClassDecl context' cname' tyvar' sigs' mbinds' NoClassPragmas src_loc)
+rnHsForeignDecl (ForeignImport name ty spec isDeprec src_loc)
+ = addSrcLoc src_loc $
+ lookupTopBndrRn name `thenM` \ name' ->
+ rnHsTypeFVs (fo_decl_msg name) ty `thenM` \ (ty', fvs) ->
+ returnM (ForeignImport name' ty' spec isDeprec src_loc,
+ fvs `plusFV` extras spec)
where
- rn_op clas tv_env (ClassOpSig op ty pragmas locn)
- = pushSrcLocRn locn $
- lookupClassOp clas op `thenRn` \ op_name ->
- rnPolyType tv_env ty `thenRn` \ new_ty ->
-
-{-
-*** Please check here that tyvar' appears in new_ty ***
-*** (used to be in tcClassSig, but it's better here)
-*** not_elem = isn'tIn "tcClassSigs"
-*** -- Check that the class type variable is mentioned
-*** checkTc (clas_tyvar `not_elem` extractTyVarTemplatesFromTy local_ty)
-*** (methodTypeLacksTyVarErr clas_tyvar (_UNPK_ op_name) src_loc) `thenTc_`
--}
-
- ASSERT(isNoClassOpPragmas pragmas)
- returnRn (ClassOpSig op_name new_ty noClassOpPragmas locn)
+ extras (CImport _ _ _ _ CWrapper)
+ = mkFVs [ newStablePtrName
+ , bindIOName
+ , returnIOName
+ ]
+ extras (DNImport _)
+ = mkFVs [ bindIOName
+ , objectTyConName
+ , unmarshalObjectName
+ , marshalObjectName
+ , marshalStringName
+ , unmarshalStringName
+ , checkDotnetResName
+ ]
+ extras _ = emptyFVs
+
+rnHsForeignDecl (ForeignExport name ty spec isDeprec src_loc)
+ = addSrcLoc src_loc $
+ lookupOccRn name `thenM` \ name' ->
+ rnHsTypeFVs (fo_decl_msg name) ty `thenM` \ (ty', fvs) ->
+ returnM (ForeignExport name' ty' spec isDeprec src_loc,
+ mkFVs [name', bindIOName, returnIOName] `plusFV` fvs )
+ -- NB: a foreign export is an *occurrence site* for name, so
+ -- we add it to the free-variable list. It might, for example,
+ -- be imported from another module
+
+fo_decl_msg name = ptext SLIT("In the foreign declaration for") <+> ppr name
\end{code}
%* *
%*********************************************************
+\begin{code}
+rnInstDecl (InstDecl inst_ty mbinds uprags maybe_dfun_rdr_name src_loc)
+ -- Used for both source and interface file decls
+ = addSrcLoc src_loc $
+ rnHsSigType (text "an instance decl") inst_ty `thenM` \ inst_ty' ->
+
+ (case maybe_dfun_rdr_name of
+ Nothing -> returnM Nothing
+ Just dfun_rdr_name -> lookupGlobalOccRn dfun_rdr_name `thenM` \ dfun_name ->
+ returnM (Just dfun_name)
+ ) `thenM` \ maybe_dfun_name ->
+
+ -- The typechecker checks that all the bindings are for the right class.
+ returnM (InstDecl inst_ty' EmptyMonoBinds [] maybe_dfun_name src_loc)
+
+-- Compare finishSourceTyClDecl
+finishSourceInstDecl (InstDecl _ mbinds uprags _ _ )
+ (InstDecl inst_ty _ _ maybe_dfun_name src_loc)
+ -- Used for both source decls only
+ = ASSERT( not (maybeToBool maybe_dfun_name) ) -- Source decl!
+ let
+ meth_doc = text "In the bindings in an instance declaration"
+ meth_names = collectLocatedMonoBinders mbinds
+ (inst_tyvars, _, cls,_) = splitHsInstDeclTy inst_ty
+ -- (Slightly strangely) the forall-d tyvars scope over
+ -- the method bindings too
+ in
-@rnInstDecl@ uses the `global name function' to create a new of
-instance declaration in which local names have been replaced by their
-original names, reporting any unknown names.
+ -- Rename the bindings
+ -- NB meth_names can be qualified!
+ checkDupNames meth_doc meth_names `thenM_`
+ extendTyVarEnvForMethodBinds inst_tyvars (
+ rnMethodBinds cls [] mbinds
+ ) `thenM` \ (mbinds', meth_fvs) ->
+ let
+ binders = collectMonoBinders mbinds'
+ in
+ -- Rename the prags and signatures.
+ -- Note that the type variables are not in scope here,
+ -- so that instance Eq a => Eq (T a) where
+ -- {-# SPECIALISE instance Eq a => Eq (T [a]) #-}
+ -- works OK.
+ --
+ -- But the (unqualified) method names are in scope
+ bindLocalNames binders (renameSigs uprags) `thenM` \ uprags' ->
+ checkSigs (okInstDclSig (mkNameSet binders)) uprags' `thenM_`
+
+ returnM (InstDecl inst_ty mbinds' uprags' maybe_dfun_name src_loc,
+ meth_fvs `plusFV` hsSigsFVs uprags')
+\end{code}
-\begin{code}
-rnInstDecl :: RdrNameInstDecl -> RnM_Fixes s RenamedInstDecl
+%*********************************************************
+%* *
+\subsection{Rules}
+%* *
+%*********************************************************
-rnInstDecl (InstDecl cname ty mbinds from_here modname uprags pragmas src_loc)
- = pushSrcLocRn src_loc $
- lookupClass cname `thenRn` \ cname' ->
+\begin{code}
+rnIfaceRuleDecl (IfaceRule rule_name act vars fn args rhs src_loc)
+ = addSrcLoc src_loc $
+ lookupOccRn fn `thenM` \ fn' ->
+ rnCoreBndrs vars $ \ vars' ->
+ mappM rnCoreExpr args `thenM` \ args' ->
+ rnCoreExpr rhs `thenM` \ rhs' ->
+ returnM (IfaceRule rule_name act vars' fn' args' rhs' src_loc)
+
+rnIfaceRuleDecl (IfaceRuleOut fn rule) -- Builtin rules come this way
+ = lookupOccRn fn `thenM` \ fn' ->
+ returnM (IfaceRuleOut fn' rule)
+
+rnHsRuleDecl (HsRule rule_name act vars lhs rhs src_loc)
+ = addSrcLoc src_loc $
+ bindPatSigTyVarsFV (collectRuleBndrSigTys vars) $
+
+ bindLocalsFV doc (map get_var vars) $ \ ids ->
+ mapFvRn rn_var (vars `zip` ids) `thenM` \ (vars', fv_vars) ->
+
+ rnExpr lhs `thenM` \ (lhs', fv_lhs) ->
+ rnExpr rhs `thenM` \ (rhs', fv_rhs) ->
+ let
+ mb_bad = validRuleLhs ids lhs'
+ in
+ checkErr (isNothing mb_bad)
+ (badRuleLhsErr rule_name lhs' mb_bad) `thenM_`
+ let
+ bad_vars = [var | var <- ids, not (var `elemNameSet` fv_lhs)]
+ in
+ mappM (addErr . badRuleVar rule_name) bad_vars `thenM_`
+ returnM (HsRule rule_name act vars' lhs' rhs' src_loc,
+ fv_vars `plusFV` fv_lhs `plusFV` fv_rhs)
+ where
+ doc = text "In the transformation rule" <+> ftext rule_name
+
+ get_var (RuleBndr v) = v
+ get_var (RuleBndrSig v _) = v
+
+ rn_var (RuleBndr v, id) = returnM (RuleBndr id, emptyFVs)
+ rn_var (RuleBndrSig v t, id) = rnHsTypeFVs doc t `thenM` \ (t', fvs) ->
+ returnM (RuleBndrSig id t', fvs)
+\end{code}
- rnPolyType [] ty `thenRn` \ ty' ->
- -- [] tv_env ensures that tyvars will be foralled
+Check the shape of a transformation rule LHS. Currently
+we only allow LHSs of the form @(f e1 .. en)@, where @f@ is
+not one of the @forall@'d variables. We also restrict the form of the LHS so
+that it may be plausibly matched. Basically you only get to write ordinary
+applications. (E.g. a case expression is not allowed: too elaborate.)
- rnMethodBinds cname' mbinds `thenRn` \ mbinds' ->
- mapRn (rn_uprag cname') uprags `thenRn` \ new_uprags ->
+NB: if you add new cases here, make sure you add new ones to TcRule.ruleLhsTvs
- ASSERT(isNoInstancePragmas pragmas)
- returnRn (InstDecl cname' ty' mbinds'
- from_here modname new_uprags noInstancePragmas src_loc)
+\begin{code}
+validRuleLhs :: [Name] -> RenamedHsExpr -> Maybe RenamedHsExpr
+-- Nothing => OK
+-- Just e => Not ok, and e is the offending expression
+validRuleLhs foralls lhs
+ = check lhs
where
- rn_uprag class_name (SpecSig op ty using locn)
- = pushSrcLocRn src_loc $
- lookupClassOp class_name op `thenRn` \ op_name ->
- rnPolyType nullTyVarNamesEnv ty `thenRn` \ new_ty ->
- rn_using using `thenRn` \ new_using ->
- returnRn (SpecSig op_name new_ty new_using locn)
-
- rn_uprag class_name (InlineSig op locn)
- = pushSrcLocRn locn $
- lookupClassOp class_name op `thenRn` \ op_name ->
- returnRn (InlineSig op_name locn)
-
- rn_uprag class_name (DeforestSig op locn)
- = pushSrcLocRn locn $
- lookupClassOp class_name op `thenRn` \ op_name ->
- returnRn (DeforestSig op_name locn)
-
- rn_uprag class_name (MagicUnfoldingSig op str locn)
- = pushSrcLocRn locn $
- lookupClassOp class_name op `thenRn` \ op_name ->
- returnRn (MagicUnfoldingSig op_name str locn)
-
- rn_using Nothing
- = returnRn Nothing
- rn_using (Just v)
- = lookupValue v `thenRn` \ new_v ->
- returnRn (Just new_v)
+ check (OpApp e1 op _ e2) = check op `seqMaybe` check_e e1 `seqMaybe` check_e e2
+ check (HsApp e1 e2) = check e1 `seqMaybe` check_e e2
+ check (HsVar v) | v `notElem` foralls = Nothing
+ check other = Just other -- Failure
+
+ check_e (HsVar v) = Nothing
+ check_e (HsPar e) = check_e e
+ check_e (HsLit e) = Nothing
+ check_e (HsOverLit e) = Nothing
+
+ check_e (OpApp e1 op _ e2) = check_e e1 `seqMaybe` check_e op `seqMaybe` check_e e2
+ check_e (HsApp e1 e2) = check_e e1 `seqMaybe` check_e e2
+ check_e (NegApp e _) = check_e e
+ check_e (ExplicitList _ es) = check_es es
+ check_e (ExplicitTuple es _) = check_es es
+ check_e other = Just other -- Fails
+
+ check_es es = foldr (seqMaybe . check_e) Nothing es
\end{code}
+
%*********************************************************
%* *
-\subsection{@SPECIALIZE instance@ user-pragmas}
+\subsection{Type, class and iface sig declarations}
%* *
%*********************************************************
+@rnTyDecl@ uses the `global name function' to create a new type
+declaration in which local names have been replaced by their original
+names, reporting any unknown names.
+
+Renaming type variables is a pain. Because they now contain uniques,
+it is necessary to pass in an association list which maps a parsed
+tyvar to its @Name@ representation.
+In some cases (type signatures of values),
+it is even necessary to go over the type first
+in order to get the set of tyvars used by it, make an assoc list,
+and then go over it again to rename the tyvars!
+However, we can also do some scoping checks at the same time.
+
\begin{code}
-rnSpecInstSig :: RdrNameSpecInstSig
- -> RnM_Fixes s RenamedSpecInstSig
+rnTyClDecl (IfaceSig {tcdName = name, tcdType = ty, tcdIdInfo = id_infos, tcdLoc = loc})
+ = addSrcLoc loc $
+ lookupTopBndrRn name `thenM` \ name' ->
+ rnHsType doc_str ty `thenM` \ ty' ->
+ mappM rnIdInfo id_infos `thenM` \ id_infos' ->
+ returnM (IfaceSig {tcdName = name', tcdType = ty', tcdIdInfo = id_infos', tcdLoc = loc})
+ where
+ doc_str = text "In the interface signature for" <+> quotes (ppr name)
+
+rnTyClDecl (ForeignType {tcdName = name, tcdFoType = fo_type, tcdExtName = ext_name, tcdLoc = loc})
+ = addSrcLoc loc $
+ lookupTopBndrRn name `thenM` \ name' ->
+ returnM (ForeignType {tcdName = name', tcdFoType = fo_type, tcdExtName = ext_name, tcdLoc = loc})
+
+rnTyClDecl (TyData {tcdND = new_or_data, tcdCtxt = context, tcdName = tycon,
+ tcdTyVars = tyvars, tcdCons = condecls, tcdGeneric = want_generic,
+ tcdDerivs = derivs, tcdLoc = src_loc})
+ = addSrcLoc src_loc $
+ lookupTopBndrRn tycon `thenM` \ tycon' ->
+ bindTyVarsRn data_doc tyvars $ \ tyvars' ->
+ rnContext data_doc context `thenM` \ context' ->
+ rn_derivs derivs `thenM` \ derivs' ->
+ checkDupOrQualNames data_doc con_names `thenM_`
+
+ rnConDecls tycon' condecls `thenM` \ condecls' ->
+ returnM (TyData {tcdND = new_or_data, tcdCtxt = context', tcdName = tycon',
+ tcdTyVars = tyvars', tcdCons = condecls', tcdGeneric = want_generic,
+ tcdDerivs = derivs', tcdLoc = src_loc})
+ where
+ data_doc = text "In the data type declaration for" <+> quotes (ppr tycon)
+ con_names = map conDeclName (visibleDataCons condecls)
+
+ rn_derivs Nothing = returnM Nothing
+ rn_derivs (Just ds) = rnContext data_doc ds `thenM` \ ds' -> returnM (Just ds')
+
+rnTyClDecl (TySynonym {tcdName = name, tcdTyVars = tyvars, tcdSynRhs = ty, tcdLoc = src_loc})
+ = addSrcLoc src_loc $
+ lookupTopBndrRn name `thenM` \ name' ->
+ bindTyVarsRn syn_doc tyvars $ \ tyvars' ->
+ rnHsType syn_doc ty `thenM` \ ty' ->
+ returnM (TySynonym {tcdName = name', tcdTyVars = tyvars', tcdSynRhs = ty', tcdLoc = src_loc})
+ where
+ syn_doc = text "In the declaration for type synonym" <+> quotes (ppr name)
+
+rnTyClDecl (ClassDecl {tcdCtxt = context, tcdName = cname,
+ tcdTyVars = tyvars, tcdFDs = fds, tcdSigs = sigs,
+ tcdLoc = src_loc})
+ -- Used for both source and interface file decls
+ = addSrcLoc src_loc $
+
+ lookupTopBndrRn cname `thenM` \ cname' ->
+
+ -- Tyvars scope over superclass context and method signatures
+ bindTyVarsRn cls_doc tyvars $ \ tyvars' ->
-rnSpecInstSig (SpecInstSig clas ty src_loc)
- = pushSrcLocRn src_loc $
+ -- Check the superclasses
+ rnContext cls_doc context `thenM` \ context' ->
+
+ -- Check the functional dependencies
+ rnFds cls_doc fds `thenM` \ fds' ->
+
+ -- Check the signatures
+ -- First process the class op sigs (op_sigs), then the fixity sigs (non_op_sigs).
let
- tyvars = extractMonoTyNames ty
+ (op_sigs, non_op_sigs) = partition isClassOpSig sigs
+ sig_rdr_names_w_locs = [(op,locn) | ClassOpSig op _ _ locn <- sigs]
in
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env,_) ->
- lookupClass clas `thenRn` \ new_clas ->
- rnMonoType tv_env ty `thenRn` \ new_ty ->
- returnRn (SpecInstSig new_clas new_ty src_loc)
+ checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenM_`
+ mappM (rnClassOp cname' fds') op_sigs `thenM` \ sigs' ->
+ renameSigs non_op_sigs `thenM` \ non_ops' ->
+ checkSigs okClsDclSig non_ops' `thenM_`
+ -- Typechecker is responsible for checking that we only
+ -- give default-method bindings for things in this class.
+ -- The renamer *could* check this for class decls, but can't
+ -- for instance decls.
+
+ returnM (ClassDecl { tcdCtxt = context', tcdName = cname', tcdTyVars = tyvars',
+ tcdFDs = fds', tcdSigs = non_ops' ++ sigs', tcdMeths = Nothing,
+ tcdLoc = src_loc})
+ where
+ cls_doc = text "In the declaration for class" <+> ppr cname
+ sig_doc = text "In the signatures for class" <+> ppr cname
+
+rnClassOp clas clas_fds sig@(ClassOpSig op dm_stuff ty locn)
+ = addSrcLoc locn $
+ lookupTopBndrRn op `thenM` \ op_name ->
+
+ -- Check the signature
+ rnHsSigType (quotes (ppr op)) ty `thenM` \ new_ty ->
+
+ -- Make the default-method name
+ (case dm_stuff of
+ DefMeth dm_rdr_name
+ -> -- Imported class that has a default method decl
+ lookupSysBndr dm_rdr_name `thenM` \ dm_name ->
+ returnM (DefMeth dm_name)
+ -- An imported class decl for a class decl that had an explicit default
+ -- method, mentions, rather than defines,
+ -- the default method, so we must arrange to pull it in
+
+ GenDefMeth -> returnM GenDefMeth
+ NoDefMeth -> returnM NoDefMeth
+ ) `thenM` \ dm_stuff' ->
+
+ returnM (ClassOpSig op_name dm_stuff' new_ty locn)
+
+finishSourceTyClDecl :: RdrNameTyClDecl -> RenamedTyClDecl -> RnM (RenamedTyClDecl, FreeVars)
+ -- Used for source file decls only
+ -- Renames the default-bindings of a class decl
+finishSourceTyClDecl (ClassDecl {tcdMeths = Just mbinds, tcdLoc = src_loc}) -- Get mbinds from here
+ rn_cls_decl@(ClassDecl {tcdName = cls, tcdTyVars = tyvars}) -- Everything else is here
+ -- There are some default-method bindings (abeit possibly empty) so
+ -- this is a source-code class declaration
+ = -- The newLocals call is tiresome: given a generic class decl
+ -- class C a where
+ -- op :: a -> a
+ -- op {| x+y |} (Inl a) = ...
+ -- op {| x+y |} (Inr b) = ...
+ -- op {| a*b |} (a*b) = ...
+ -- we want to name both "x" tyvars with the same unique, so that they are
+ -- easy to group together in the typechecker.
+ -- Hence the
+ addSrcLoc src_loc $
+ extendTyVarEnvForMethodBinds tyvars $
+ getLocalRdrEnv `thenM` \ name_env ->
+ let
+ meth_rdr_names_w_locs = collectLocatedMonoBinders mbinds
+ gen_rdr_tyvars_w_locs = [(tv,src_loc) | tv <- extractGenericPatTyVars mbinds,
+ not (tv `elemRdrEnv` name_env)]
+ in
+ checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenM_`
+ newLocalsRn gen_rdr_tyvars_w_locs `thenM` \ gen_tyvars ->
+ rnMethodBinds cls gen_tyvars mbinds `thenM` \ (mbinds', meth_fvs) ->
+ returnM (rn_cls_decl {tcdMeths = Just mbinds'}, meth_fvs)
+ where
+ meth_doc = text "In the default-methods for class" <+> ppr (tcdName rn_cls_decl)
+
+finishSourceTyClDecl _ tycl_decl@(TyData {tcdDerivs = derivings})
+ -- Derivings are returned here so that they don't form part of the tyClDeclFVs.
+ -- This is important, because tyClDeclFVs should contain only the
+ -- FVs that are `needed' by the interface file declaration, and
+ -- derivings do not appear in this. It also means that the tcGroups
+ -- are smaller, which turned out to be important for the usage inference. KSW 2002-02.
+ = returnM (tycl_decl,
+ maybe emptyFVs extractHsCtxtTyNames derivings)
+
+finishSourceTyClDecl _ tycl_decl = returnM (tycl_decl, emptyFVs)
+ -- Not a class declaration
+\end{code}
+
+For the method bindings in class and instance decls, we extend the
+type variable environment iff -fglasgow-exts
+
+\begin{code}
+extendTyVarEnvForMethodBinds tyvars thing_inside
+ = doptM Opt_GlasgowExts `thenM` \ opt_GlasgowExts ->
+ if opt_GlasgowExts then
+ extendTyVarEnvFVRn (map hsTyVarName tyvars) thing_inside
+ else
+ thing_inside
\end{code}
+
%*********************************************************
%* *
-\subsection{Default declarations}
+\subsection{Support code for type/data declarations}
%* *
%*********************************************************
-@rnDefaultDecl@ uses the `global name function' to create a new set
-of default declarations in which local names have been replaced by
-their original names, reporting any unknown names.
-
\begin{code}
-rnDefaultDecl :: [RdrNameDefaultDecl] -> RnM_Fixes s [RenamedDefaultDecl]
-
-rnDefaultDecl [] = returnRn []
-rnDefaultDecl [DefaultDecl tys src_loc]
- = pushSrcLocRn src_loc $
- mapRn (rnMonoType nullTyVarNamesEnv) tys `thenRn` \ tys' ->
- returnRn [DefaultDecl tys' src_loc]
-rnDefaultDecl defs@(d:ds)
- = addErrRn (dupDefaultDeclErr defs) `thenRn_`
- rnDefaultDecl [d]
-\end{code}
+conDeclName :: RdrNameConDecl -> (RdrName, SrcLoc)
+conDeclName (ConDecl n _ _ _ l) = (n,l)
+
+rnConDecls :: Name -> DataConDetails RdrNameConDecl -> RnM (DataConDetails RenamedConDecl)
+rnConDecls tycon Unknown = returnM Unknown
+rnConDecls tycon (HasCons n) = returnM (HasCons n)
+rnConDecls tycon (DataCons condecls)
+ = -- Check that there's at least one condecl,
+ -- or else we're reading an interface file, or -fglasgow-exts
+ (if null condecls then
+ doptM Opt_GlasgowExts `thenM` \ glaExts ->
+ getModeRn `thenM` \ mode ->
+ checkErr (glaExts || isInterfaceMode mode)
+ (emptyConDeclsErr tycon)
+ else returnM ()
+ ) `thenM_`
+
+ mappM rnConDecl condecls `thenM` \ condecls' ->
+ returnM (DataCons condecls')
+
+rnConDecl :: RdrNameConDecl -> RnM RenamedConDecl
+rnConDecl (ConDecl name tvs cxt details locn)
+ = addSrcLoc locn $
+ checkConName name `thenM_`
+ lookupTopBndrRn name `thenM` \ new_name ->
+
+ bindTyVarsRn doc tvs $ \ new_tyvars ->
+ rnContext doc cxt `thenM` \ new_context ->
+ rnConDetails doc locn details `thenM` \ new_details ->
+ returnM (ConDecl new_name new_tyvars new_context new_details locn)
+ where
+ doc = text "In the definition of data constructor" <+> quotes (ppr name)
-%*************************************************************************
-%* *
-\subsection{Fixity declarations}
-%* *
-%*************************************************************************
+rnConDetails doc locn (PrefixCon tys)
+ = mappM (rnBangTy doc) tys `thenM` \ new_tys ->
+ returnM (PrefixCon new_tys)
-\begin{code}
-rnFixes :: [RdrNameFixityDecl] -> RnM s [RenamedFixityDecl]
+rnConDetails doc locn (InfixCon ty1 ty2)
+ = rnBangTy doc ty1 `thenM` \ new_ty1 ->
+ rnBangTy doc ty2 `thenM` \ new_ty2 ->
+ returnM (InfixCon new_ty1 new_ty2)
-rnFixes fixities
- = mapRn rn_fixity fixities `thenRn` \ fixes_maybe ->
- returnRn (catMaybes fixes_maybe)
+rnConDetails doc locn (RecCon fields)
+ = checkDupOrQualNames doc field_names `thenM_`
+ mappM (rnField doc) fields `thenM` \ new_fields ->
+ returnM (RecCon new_fields)
where
- rn_fixity fix@(InfixL name i)
- = rn_fixity_pieces InfixL name i fix
- rn_fixity fix@(InfixR name i)
- = rn_fixity_pieces InfixR name i fix
- rn_fixity fix@(InfixN name i)
- = rn_fixity_pieces InfixN name i fix
-
- rn_fixity_pieces mk_fixity name i fix
- = lookupValueMaybe name `thenRn` \ maybe_res ->
- case maybe_res of
- Just res | isLocallyDefined res
- -> returnRn (Just (mk_fixity res i))
- _ -> failButContinueRn Nothing (undefinedFixityDeclErr fix)
-
+ field_names = [(fld, locn) | (fld, _) <- fields]
+
+rnField doc (name, ty)
+ = lookupTopBndrRn name `thenM` \ new_name ->
+ rnBangTy doc ty `thenM` \ new_ty ->
+ returnM (new_name, new_ty)
+
+rnBangTy doc (BangType s ty)
+ = rnHsType doc ty `thenM` \ new_ty ->
+ returnM (BangType s new_ty)
+
+-- This data decl will parse OK
+-- data T = a Int
+-- treating "a" as the constructor.
+-- It is really hard to make the parser spot this malformation.
+-- So the renamer has to check that the constructor is legal
+--
+-- We can get an operator as the constructor, even in the prefix form:
+-- data T = :% Int Int
+-- from interface files, which always print in prefix form
+
+checkConName name
+ = checkErr (isRdrDataCon name) (badDataCon name)
\end{code}
+
%*********************************************************
%* *
\subsection{Support code to rename types}
%*********************************************************
\begin{code}
-rnPolyType :: TyVarNamesEnv
- -> RdrNamePolyType
- -> RnM_Fixes s RenamedPolyType
-
-rnPolyType tv_env (HsForAllTy tvs ctxt ty)
- = rn_poly_help tv_env tvs ctxt ty
+rnFds :: SDoc -> [FunDep RdrName] -> RnM [FunDep Name]
-rnPolyType tv_env poly_ty@(HsPreForAllTy ctxt ty)
- = rn_poly_help tv_env forall_tyvars ctxt ty
+rnFds doc fds
+ = mappM rn_fds fds
where
- mentioned_tyvars = extract_poly_ty_names poly_ty
- forall_tyvars = mentioned_tyvars `minusList` domTyVarNamesEnv tv_env
-
-------------
-extract_poly_ty_names (HsPreForAllTy ctxt ty)
- = extractCtxtTyNames ctxt
- `unionLists`
- extractMonoTyNames ty
-
-------------
-rn_poly_help :: TyVarNamesEnv
- -> [RdrName]
- -> RdrNameContext
- -> RdrNameMonoType
- -> RnM_Fixes s RenamedPolyType
-
-rn_poly_help tv_env tyvars ctxt ty
- = getSrcLocRn `thenRn` \ src_loc ->
- mkTyVarNamesEnv src_loc tyvars `thenRn` \ (tv_env1, new_tyvars) ->
- let
- tv_env2 = catTyVarNamesEnvs tv_env1 tv_env
- in
- rnContext tv_env2 ctxt `thenRn` \ new_ctxt ->
- rnMonoType tv_env2 ty `thenRn` \ new_ty ->
- returnRn (HsForAllTy new_tyvars new_ctxt new_ty)
+ rn_fds (tys1, tys2)
+ = rnHsTyVars doc tys1 `thenM` \ tys1' ->
+ rnHsTyVars doc tys2 `thenM` \ tys2' ->
+ returnM (tys1', tys2')
+
+rnHsTyVars doc tvs = mappM (rnHsTyvar doc) tvs
+rnHsTyvar doc tyvar = lookupOccRn tyvar
\end{code}
+%*********************************************************
+%* *
+\subsection{IdInfo}
+%* *
+%*********************************************************
+
\begin{code}
-rnMonoType :: TyVarNamesEnv
- -> RdrNameMonoType
- -> RnM_Fixes s RenamedMonoType
-
-rnMonoType tv_env (MonoTyVar tyvar)
- = lookupTyVarName tv_env tyvar `thenRn` \ tyvar' ->
- returnRn (MonoTyVar tyvar')
-
-rnMonoType tv_env (MonoListTy ty)
- = rnMonoType tv_env ty `thenRn` \ ty' ->
- returnRn (MonoListTy ty')
-
-rnMonoType tv_env (MonoFunTy ty1 ty2)
- = andRn MonoFunTy (rnMonoType tv_env ty1)
- (rnMonoType tv_env ty2)
-
-rnMonoType tv_env (MonoTupleTy tys)
- = mapRn (rnMonoType tv_env) tys `thenRn` \ tys' ->
- returnRn (MonoTupleTy tys')
-
-rnMonoType tv_env (MonoTyApp name tys)
- = let
- lookup_fn = if isAvarid (getLocalName name)
- then lookupTyVarName tv_env
- else lookupTyCon
- in
- lookup_fn name `thenRn` \ name' ->
- mapRn (rnMonoType tv_env) tys `thenRn` \ tys' ->
- returnRn (MonoTyApp name' tys')
+rnIdInfo (HsWorker worker arity)
+ = lookupOccRn worker `thenM` \ worker' ->
+ returnM (HsWorker worker' arity)
+
+rnIdInfo (HsUnfold inline expr) = rnCoreExpr expr `thenM` \ expr' ->
+ returnM (HsUnfold inline expr')
+rnIdInfo (HsStrictness str) = returnM (HsStrictness str)
+rnIdInfo (HsArity arity) = returnM (HsArity arity)
+rnIdInfo HsNoCafRefs = returnM HsNoCafRefs
\end{code}
-\begin{code}
-rnContext :: TyVarNamesEnv -> RdrNameContext -> RnM_Fixes s RenamedContext
+@UfCore@ expressions.
-rnContext tv_env ctxt
- = mapRn rn_ctxt ctxt
+\begin{code}
+rnCoreExpr (UfType ty)
+ = rnHsType (text "unfolding type") ty `thenM` \ ty' ->
+ returnM (UfType ty')
+
+rnCoreExpr (UfVar v)
+ = lookupOccRn v `thenM` \ v' ->
+ returnM (UfVar v')
+
+rnCoreExpr (UfLit l)
+ = returnM (UfLit l)
+
+rnCoreExpr (UfLitLit l ty)
+ = rnHsType (text "litlit") ty `thenM` \ ty' ->
+ returnM (UfLitLit l ty')
+
+rnCoreExpr (UfFCall cc ty)
+ = rnHsType (text "ccall") ty `thenM` \ ty' ->
+ returnM (UfFCall cc ty')
+
+rnCoreExpr (UfTuple (HsTupCon boxity arity) args)
+ = mappM rnCoreExpr args `thenM` \ args' ->
+ returnM (UfTuple (HsTupCon boxity arity) args')
+
+rnCoreExpr (UfApp fun arg)
+ = rnCoreExpr fun `thenM` \ fun' ->
+ rnCoreExpr arg `thenM` \ arg' ->
+ returnM (UfApp fun' arg')
+
+rnCoreExpr (UfCase scrut bndr alts)
+ = rnCoreExpr scrut `thenM` \ scrut' ->
+ bindCoreLocalRn bndr $ \ bndr' ->
+ mappM rnCoreAlt alts `thenM` \ alts' ->
+ returnM (UfCase scrut' bndr' alts')
+
+rnCoreExpr (UfNote note expr)
+ = rnNote note `thenM` \ note' ->
+ rnCoreExpr expr `thenM` \ expr' ->
+ returnM (UfNote note' expr')
+
+rnCoreExpr (UfLam bndr body)
+ = rnCoreBndr bndr $ \ bndr' ->
+ rnCoreExpr body `thenM` \ body' ->
+ returnM (UfLam bndr' body')
+
+rnCoreExpr (UfLet (UfNonRec bndr rhs) body)
+ = rnCoreExpr rhs `thenM` \ rhs' ->
+ rnCoreBndr bndr $ \ bndr' ->
+ rnCoreExpr body `thenM` \ body' ->
+ returnM (UfLet (UfNonRec bndr' rhs') body')
+
+rnCoreExpr (UfLet (UfRec pairs) body)
+ = rnCoreBndrs bndrs $ \ bndrs' ->
+ mappM rnCoreExpr rhss `thenM` \ rhss' ->
+ rnCoreExpr body `thenM` \ body' ->
+ returnM (UfLet (UfRec (bndrs' `zip` rhss')) body')
where
- rn_ctxt (clas, tyvar)
- = lookupClass clas `thenRn` \ clas_name ->
- lookupTyVarName tv_env tyvar `thenRn` \ tyvar_name ->
- returnRn (clas_name, tyvar_name)
+ (bndrs, rhss) = unzip pairs
\end{code}
+\begin{code}
+rnCoreBndr (UfValBinder name ty) thing_inside
+ = rnHsType doc ty `thenM` \ ty' ->
+ bindCoreLocalRn name $ \ name' ->
+ thing_inside (UfValBinder name' ty')
+ where
+ doc = text "unfolding id"
+
+rnCoreBndr (UfTyBinder name kind) thing_inside
+ = bindCoreLocalRn name $ \ name' ->
+ thing_inside (UfTyBinder name' kind)
+
+rnCoreBndrs [] thing_inside = thing_inside []
+rnCoreBndrs (b:bs) thing_inside = rnCoreBndr b $ \ name' ->
+ rnCoreBndrs bs $ \ names' ->
+ thing_inside (name':names')
+\end{code}
\begin{code}
-derivingNonStdClassErr clas locn sty
- = ppHang (ppStr "Non-standard class in deriving")
- 4 (ppCat [ppr sty clas, ppr sty locn])
+rnCoreAlt (con, bndrs, rhs)
+ = rnUfCon con `thenM` \ con' ->
+ bindCoreLocalsRn bndrs $ \ bndrs' ->
+ rnCoreExpr rhs `thenM` \ rhs' ->
+ returnM (con', bndrs', rhs')
+
+rnNote (UfCoerce ty)
+ = rnHsType (text "unfolding coerce") ty `thenM` \ ty' ->
+ returnM (UfCoerce ty')
+
+rnNote (UfSCC cc) = returnM (UfSCC cc)
+rnNote UfInlineCall = returnM UfInlineCall
+rnNote UfInlineMe = returnM UfInlineMe
+rnNote (UfCoreNote s) = returnM (UfCoreNote s)
+
+rnUfCon UfDefault
+ = returnM UfDefault
+
+rnUfCon (UfTupleAlt tup_con)
+ = returnM (UfTupleAlt tup_con)
-dupDefaultDeclErr defs sty
- = ppHang (ppStr "Duplicate default declarations")
- 4 (ppAboves (map pp_def_loc defs))
+rnUfCon (UfDataAlt con)
+ = lookupOccRn con `thenM` \ con' ->
+ returnM (UfDataAlt con')
+
+rnUfCon (UfLitAlt lit)
+ = returnM (UfLitAlt lit)
+
+rnUfCon (UfLitLitAlt lit ty)
+ = rnHsType (text "litlit") ty `thenM` \ ty' ->
+ returnM (UfLitLitAlt lit ty')
+\end{code}
+
+%*********************************************************
+%* *
+\subsection{Statistics}
+%* *
+%*********************************************************
+
+\begin{code}
+rnStats :: [RenamedHsDecl] -- Imported decls
+ -> TcRn m ()
+rnStats imp_decls
+ = doptM Opt_D_dump_rn_trace `thenM` \ dump_rn_trace ->
+ doptM Opt_D_dump_rn_stats `thenM` \ dump_rn_stats ->
+ doptM Opt_D_dump_rn `thenM` \ dump_rn ->
+ getEps `thenM` \ eps ->
+
+ ioToTcRn (dumpIfSet (dump_rn_trace || dump_rn_stats || dump_rn)
+ "Renamer statistics"
+ (getRnStats eps imp_decls)) `thenM_`
+ returnM ()
+
+getRnStats :: ExternalPackageState -> [RenamedHsDecl] -> SDoc
+getRnStats eps imported_decls
+ = hcat [text "Renamer stats: ", stats]
where
- pp_def_loc (DefaultDecl _ src_loc) = ppr sty src_loc
+ n_mods = length [() | _ <- moduleEnvElts (eps_PIT eps)]
+ -- This is really only right for a one-shot compile
+
+ (decls_map, n_decls_slurped) = eps_decls eps
+
+ n_decls_left = length [decl | (avail, True, (_,decl)) <- nameEnvElts decls_map
+ -- Data, newtype, and class decls are in the decls_fm
+ -- under multiple names; the tycon/class, and each
+ -- constructor/class op too.
+ -- The 'True' selects just the 'main' decl
+ ]
+
+ (insts_left, n_insts_slurped) = eps_insts eps
+ n_insts_left = length (bagToList insts_left)
+
+ (rules_left, n_rules_slurped) = eps_rules eps
+ n_rules_left = length (bagToList rules_left)
+
+ stats = vcat
+ [int n_mods <+> text "interfaces read",
+ hsep [ int n_decls_slurped, text "type/class/variable imported, out of",
+ int (n_decls_slurped + n_decls_left), text "read"],
+ hsep [ int n_insts_slurped, text "instance decls imported, out of",
+ int (n_insts_slurped + n_insts_left), text "read"],
+ hsep [ int n_rules_slurped, text "rule decls imported, out of",
+ int (n_rules_slurped + n_rules_left), text "read"]
+ ]
+\end{code}
-undefinedFixityDeclErr decl sty
- = ppHang (ppStr "Fixity declaration for unknown operator")
- 4 (ppr sty decl)
+%*********************************************************
+%* *
+\subsection{Errors}
+%* *
+%*********************************************************
+
+\begin{code}
+badDataCon name
+ = hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
+
+badRuleLhsErr name lhs (Just bad_e)
+ = sep [ptext SLIT("Rule") <+> ftext name <> colon,
+ nest 4 (vcat [ptext SLIT("Illegal expression:") <+> ppr bad_e,
+ ptext SLIT("in left-hand side:") <+> ppr lhs])]
+ $$
+ ptext SLIT("LHS must be of form (f e1 .. en) where f is not forall'd")
+
+badRuleVar name var
+ = sep [ptext SLIT("Rule") <+> doubleQuotes (ftext name) <> colon,
+ ptext SLIT("Forall'd variable") <+> quotes (ppr var) <+>
+ ptext SLIT("does not appear on left hand side")]
+
+emptyConDeclsErr tycon
+ = sep [quotes (ppr tycon) <+> ptext SLIT("has no constructors"),
+ nest 4 (ptext SLIT("(-fglasgow-exts permits this)"))]
+
+withWarning
+ = sep [quotes (ptext SLIT("with")),
+ ptext SLIT("is deprecated, use"),
+ quotes (ptext SLIT("let")),
+ ptext SLIT("instead")]
+
+badIpBinds binds
+ = hang (ptext SLIT("Implicit-parameter bindings illegal in 'mdo':")) 4
+ (ppr binds)
\end{code}
+
projects / ghc-hetmet.git / blobdiff