\begin{code}
module RnSource (
- rnSrcDecls, checkModDeprec,
- rnTyClDecl, rnIfaceRuleDecl, rnInstDecl,
- rnBinds, rnBindsAndThen, rnStats,
+ rnSrcDecls, addTcgDUs,
+ rnTyClDecls, checkModDeprec,
+ rnBinds, rnBindsAndThen
) where
#include "HsVersions.h"
import HsSyn
-import RdrName ( RdrName, isRdrDataCon, elemRdrEnv )
-import RdrHsSyn ( RdrNameConDecl, RdrNameTyClDecl,
+import RdrName ( RdrName, isRdrDataCon, rdrNameOcc, elemLocalRdrEnv )
+import RdrHsSyn ( RdrNameConDecl, RdrNameHsBinds,
RdrNameDeprecation, RdrNameFixitySig,
- RdrNameHsBinds,
- extractGenericPatTyVars
- )
+ extractGenericPatTyVars )
import RnHsSyn
-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,
+import RnEnv ( lookupTopBndrRn, lookupTopFixSigNames,
+ lookupOccRn, newLocalsRn,
bindLocalsFV, bindPatSigTyVarsFV,
bindTyVarsRn, extendTyVarEnvFVRn,
- bindCoreLocalRn, bindCoreLocalsRn, bindLocalNames,
- checkDupOrQualNames, checkDupNames, mapFvRn,
- lookupTopSrcBndr_maybe, lookupTopSrcBndr,
- dataTcOccs, newIPName, unknownNameErr
+ bindLocalNames, newIPNameRn,
+ checkDupNames, mapFvRn,
+ 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 BasicTypes ( TopLevelFlag(..) )
+import HscTypes ( FixityEnv, FixItem(..),
+ Deprecations, Deprecs(..), DeprecTxt, plusDeprecs )
+import Class ( FunDep )
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 Outputable
import SrcLoc ( SrcLoc )
import CmdLineOpts ( DynFlag(..) )
-- Warn of unused for-all'd tyvars
-import Maybes ( maybeToBool, seqMaybe )
-import Maybe ( maybe, catMaybes, isNothing )
+import Maybes ( seqMaybe )
+import Maybe ( catMaybes, isNothing )
\end{code}
@rnSourceDecl@ `renames' declarations.
\begin{code}
-rnSrcDecls :: HsGroup RdrName -> RnM (TcGblEnv, HsGroup Name, DefUses)
+rnSrcDecls :: HsGroup RdrName -> RnM (TcGblEnv, HsGroup Name)
rnSrcDecls (HsGroup { hs_valds = MonoBind binds sigs _,
hs_tyclds = tycl_decls,
hs_depds = deprec_decls,
hs_fords = foreign_decls,
hs_defds = default_decls,
- hs_ruleds = rule_decls,
- hs_coreds = core_decls })
+ hs_ruleds = rule_decls })
= do { -- Deal with deprecations (returns only the extra deprecations)
deprecs <- rnSrcDeprecDecls deprec_decls ;
-- 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_tycl_decls, src_fvs1) <- mapFvRn rnTyClDecl 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_depds = [],
hs_fords = rn_foreign_decls,
hs_defds = rn_default_decls,
- hs_ruleds = rn_rule_decls,
- hs_coreds = rn_core_decls } ;
+ hs_ruleds = rn_rule_decls } ;
other_fvs = plusFVs [src_fvs1, src_fvs2, src_fvs3,
- src_fvs4, src_fvs5, src_fvs6] ;
+ src_fvs4, src_fvs5] ;
src_dus = bind_dus `plusDU` usesOnly other_fvs
} ;
tcg_env <- getGblEnv ;
- return (tcg_env, rn_group, src_dus)
+ return (tcg_env `addTcgDUs` src_dus, rn_group)
}}}
+rnTyClDecls :: [TyClDecl RdrName] -> RnM [TyClDecl Name]
+rnTyClDecls tycl_decls = do { (decls', fvs) <- mapFvRn rnTyClDecl tycl_decls
+ ; return decls' }
+
+addTcgDUs :: TcGblEnv -> DefUses -> TcGblEnv
+addTcgDUs tcg_env dus = tcg_env { tcg_dus = tcg_dus tcg_env `plusDU` dus }
\end{code}
%*********************************************************
\begin{code}
-rnSrcFixityDecls :: [RdrNameFixitySig] -> TcRn m FixityEnv
+rnSrcFixityDecls :: [RdrNameFixitySig] -> RnM 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_`
+ fix_decls `thenM` \ fix_env ->
+ traceRn (text "fixity env" <+> pprFixEnv fix_env) `thenM_`
returnM fix_env
-rnFixityDecl :: FixityEnv -> RdrNameFixitySig -> TcRn m FixityEnv
+rnFixityDecl :: FixityEnv -> RdrNameFixitySig -> RnM 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
+ lookupTopFixSigNames rdr_name `thenM` \ names ->
+ if null names then
+ addSrcLoc loc (addErr (unknownNameErr rdr_name)) `thenM_`
+ returnM fix_env
+ else
+ foldlM add fix_env names
where
- add fix_env name
+ 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))
+ Just (FixItem _ _ loc')
+ -> addErr (dupFixityDecl rdr_name loc loc') `thenM_`
+ returnM fix_env
+ Nothing -> returnM (extendNameEnv fix_env name fix_item)
+ where
+ fix_item = FixItem (rdrNameOcc rdr_name) fixity loc
+
+pprFixEnv :: FixityEnv -> SDoc
+pprFixEnv env
+ = pprWithCommas (\ (FixItem n f _) -> ppr f <+> ppr n)
+ (nameEnvElts env)
dupFixityDecl rdr_name loc1 loc2
= vcat [ptext SLIT("Multiple fixity declarations for") <+> quotes (ppr rdr_name),
gather them together.
\begin{code}
-rnSrcDeprecDecls :: [RdrNameDeprecation] -> TcRn m Deprecations
+rnSrcDeprecDecls :: [RdrNameDeprecation] -> RnM Deprecations
rnSrcDeprecDecls []
= returnM NoDeprecs
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)))
+ = addSrcLoc loc $
+ lookupTopBndrRn rdr_name `thenM` \ name ->
+ returnM (Just (name, (rdrNameOcc rdr_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)]
+checkModDeprec (Just txt) = DeprecAll txt
\end{code}
%*********************************************************
%*********************************************************
\begin{code}
-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) ->
+ = 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"
-
-
-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
- doc_str = text "In the Core declaration for" <+> quotes (ppr name)
\end{code}
%*********************************************************
= rnIPBinds binds `thenM` \ (binds',fv_binds) ->
thing_inside (IPBinds binds') `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 ->
+ = newIPNameRn n `thenM` \ name ->
rnExpr expr `thenM` \ (expr',fvExpr) ->
rnIPBinds binds `thenM` \ (binds',fvBinds) ->
returnM ((name, expr') : binds', fvExpr `plusFV` fvBinds)
+
+badIpBinds binds
+ = hang (ptext SLIT("Implicit-parameter bindings illegal in 'mdo':")) 4
+ (ppr binds)
\end{code}
= 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
- extras (CImport _ _ _ _ CWrapper)
- = mkFVs [ newStablePtrName
- , bindIOName
- , returnIOName
- ]
- extras (DNImport _)
- = mkFVs [ bindIOName
- , objectTyConName
- , unmarshalObjectName
- , marshalObjectName
- , marshalStringName
- , unmarshalStringName
- , checkDotnetResName
- ]
- extras _ = emptyFVs
+ returnM (ForeignImport name' ty' spec isDeprec src_loc, fvs)
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 )
+ lookupOccRn name `thenM` \ name' ->
+ rnHsTypeFVs (fo_decl_msg name) ty `thenM` \ (ty', fvs) ->
+ returnM (ForeignExport name' ty' spec isDeprec src_loc, 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
%*********************************************************
\begin{code}
-rnInstDecl (InstDecl inst_ty mbinds uprags maybe_dfun_rdr_name src_loc)
+rnSrcInstDecl (InstDecl inst_ty mbinds uprags 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!
+ -- Rename the bindings
+ -- The typechecker (not the renamer) checks that all
+ -- the bindings are for the right class
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
+ (inst_tyvars, _, cls,_) = splitHsInstDeclTy inst_ty'
in
-
- -- Rename the bindings
- -- NB meth_names can be qualified!
- checkDupNames meth_doc meth_names `thenM_`
+ checkDupNames meth_doc meth_names `thenM_`
extendTyVarEnvForMethodBinds inst_tyvars (
+ -- (Slightly strangely) the forall-d tyvars scope over
+ -- the method bindings too
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
-- works OK.
--
-- But the (unqualified) method names are in scope
+ let
+ binders = collectMonoBinders mbinds'
+ in
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')
+ returnM (InstDecl inst_ty' mbinds' uprags' src_loc,
+ meth_fvs `plusFV` hsSigsFVs uprags'
+ `plusFV` extractHsTyNames inst_ty')
\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{Rules}
%*********************************************************
\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) $
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)
+ fv_vars `plusFV` fv_lhs `plusFV` fv_rhs)
where
doc = text "In the transformation rule" <+> ftext rule_name
check_e other = Just other -- Fails
check_es es = foldr (seqMaybe . check_e) Nothing es
+
+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")]
\end{code}
However, we can also do some scoping checks at the same time.
\begin{code}
-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})
+ returnM (ForeignType {tcdName = name', tcdFoType = fo_type, tcdExtName = ext_name, tcdLoc = loc},
+ emptyFVs)
rnTyClDecl (TyData {tcdND = new_or_data, tcdCtxt = context, tcdName = tycon,
- tcdTyVars = tyvars, tcdCons = condecls, tcdGeneric = want_generic,
- tcdDerivs = derivs, tcdLoc = src_loc})
+ tcdTyVars = tyvars, tcdCons = condecls,
+ 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_`
-
+ rn_derivs derivs `thenM` \ (derivs', deriv_fvs) ->
+ checkDupNames 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})
+ tcdTyVars = tyvars', tcdCons = condecls',
+ tcdDerivs = derivs', tcdLoc = src_loc},
+ delFVs (map hsTyVarName tyvars') $
+ extractHsCtxtTyNames context' `plusFV`
+ plusFVs (map conDeclFVs condecls') `plusFV`
+ deriv_fvs)
where
data_doc = text "In the data type declaration for" <+> quotes (ppr tycon)
- con_names = map conDeclName (visibleDataCons condecls)
+ con_names = map conDeclName condecls
- rn_derivs Nothing = returnM Nothing
- rn_derivs (Just ds) = rnContext data_doc ds `thenM` \ ds' -> returnM (Just ds')
+ rn_derivs Nothing = returnM (Nothing, emptyFVs)
+ rn_derivs (Just ds) = rnContext data_doc ds `thenM` \ ds' ->
+ returnM (Just ds', extractHsCtxtTyNames 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})
+ rnHsTypeFVs syn_doc ty `thenM` \ (ty', fvs) ->
+ returnM (TySynonym {tcdName = name', tcdTyVars = tyvars',
+ tcdSynRhs = ty', tcdLoc = src_loc},
+ delFVs (map hsTyVarName tyvars') fvs)
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
+ tcdMeths = mbinds, tcdLoc = src_loc})
= addSrcLoc src_loc $
-
lookupTopBndrRn cname `thenM` \ cname' ->
-- Tyvars scope over superclass context and method signatures
- bindTyVarsRn cls_doc tyvars $ \ tyvars' ->
-
- -- Check the superclasses
- rnContext cls_doc context `thenM` \ context' ->
-
- -- Check the functional dependencies
- rnFds cls_doc fds `thenM` \ fds' ->
+ bindTyVarsRn cls_doc tyvars ( \ tyvars' ->
+ rnContext cls_doc context `thenM` \ context' ->
+ rnFds cls_doc fds `thenM` \ fds' ->
+ renameSigs sigs `thenM` \ sigs' ->
+ returnM (tyvars', context', fds', sigs')
+ ) `thenM` \ (tyvars', context', fds', sigs') ->
-- Check the signatures
-- First process the class op sigs (op_sigs), then the fixity sigs (non_op_sigs).
let
- (op_sigs, non_op_sigs) = partition isClassOpSig sigs
- sig_rdr_names_w_locs = [(op,locn) | ClassOpSig op _ _ locn <- sigs]
+ sig_rdr_names_w_locs = [(op,locn) | Sig op _ locn <- sigs]
in
- 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_`
+ checkDupNames sig_doc sig_rdr_names_w_locs `thenM_`
+ checkSigs okClsDclSig sigs' `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
+ -- The newLocals call is tiresome: given a generic class decl
-- class C a where
-- op :: a -> a
-- op {| x+y |} (Inl a) = ...
-- 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}
+ 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 `elemLocalRdrEnv` name_env)]
+ in
+ checkDupNames meth_doc meth_rdr_names_w_locs `thenM_`
+ newLocalsRn gen_rdr_tyvars_w_locs `thenM` \ gen_tyvars ->
+ rnMethodBinds cname' gen_tyvars mbinds
+ ) `thenM` \ (mbinds', meth_fvs) ->
-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
+ returnM (ClassDecl { tcdCtxt = context', tcdName = cname', tcdTyVars = tyvars',
+ tcdFDs = fds', tcdSigs = sigs', tcdMeths = mbinds',
+ tcdLoc = src_loc},
+ delFVs (map hsTyVarName tyvars') $
+ extractHsCtxtTyNames context' `plusFV`
+ plusFVs (map extractFunDepNames fds') `plusFV`
+ hsSigsFVs sigs' `plusFV`
+ meth_fvs)
+ where
+ meth_doc = text "In the default-methods for class" <+> ppr cname
+ cls_doc = text "In the declaration for class" <+> ppr cname
+ sig_doc = text "In the signatures for class" <+> ppr cname
\end{code}
-
%*********************************************************
%* *
\subsection{Support code for type/data declarations}
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)
+rnConDecls :: Name -> [RdrNameConDecl] -> RnM [RenamedConDecl]
+rnConDecls tycon 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)
+ checkErr glaExts (emptyConDeclsErr tycon)
else returnM ()
) `thenM_`
-
- mappM rnConDecl condecls `thenM` \ condecls' ->
- returnM (DataCons condecls')
+ mappM rnConDecl condecls
rnConDecl :: RdrNameConDecl -> RnM RenamedConDecl
rnConDecl (ConDecl name tvs cxt details locn)
returnM (InfixCon new_ty1 new_ty2)
rnConDetails doc locn (RecCon fields)
- = checkDupOrQualNames doc field_names `thenM_`
+ = checkDupNames doc field_names `thenM_`
mappM (rnField doc) fields `thenM` \ new_fields ->
returnM (RecCon new_fields)
where
-- data T = :% Int Int
-- from interface files, which always print in prefix form
-checkConName name
- = checkErr (isRdrDataCon name) (badDataCon name)
+checkConName name = checkErr (isRdrDataCon name) (badDataCon name)
+
+badDataCon name
+ = hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
+
+emptyConDeclsErr tycon
+ = sep [quotes (ppr tycon) <+> ptext SLIT("has no constructors"),
+ nest 4 (ptext SLIT("(-fglasgow-exts permits this)"))]
\end{code}
rnHsTyvar doc tyvar = lookupOccRn tyvar
\end{code}
-%*********************************************************
-%* *
-\subsection{IdInfo}
-%* *
-%*********************************************************
-
-\begin{code}
-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}
-
-@UfCore@ expressions.
-
-\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 (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
- (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}
-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)
-
-rnUfCon (UfDataAlt con)
- = lookupOccRn con `thenM` \ con' ->
- returnM (UfDataAlt con')
-
-rnUfCon (UfLitAlt lit)
- = returnM (UfLitAlt lit)
-\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
- 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}
-
-%*********************************************************
-%* *
-\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}
-
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