import HsSyn
import HscTypes ( GlobalRdrEnv )
import HsTypes ( hsTyVarNames, pprHsContext )
-import RdrName ( RdrName, isRdrDataCon, rdrNameOcc, elemRdrEnv )
+import RdrName ( RdrName, isRdrDataCon, elemRdrEnv )
import RdrHsSyn ( RdrNameContext, RdrNameHsType, RdrNameConDecl, RdrNameTyClDecl,
extractRuleBndrsTyVars, extractHsTyRdrTyVars,
extractHsCtxtRdrTyVars, extractGenericPatTyVars
import Class ( FunDep, DefMeth (..) )
import DataCon ( dataConId )
-import Name ( Name, OccName, nameOccName, NamedThing(..) )
+import Name ( Name, NamedThing(..) )
import NameSet
import PrelInfo ( derivableClassKeys, cCallishClassKeys )
import PrelNames ( deRefStablePtr_RDR, newStablePtr_RDR,
import CmdLineOpts ( DynFlag(..) )
-- Warn of unused for-all'd tyvars
import Unique ( Uniquable(..) )
-import ErrUtils ( Message )
-import CStrings ( isCLabelString )
+import Maybes ( maybeToBool )
import ListSetOps ( removeDupsEq )
\end{code}
%*********************************************************
%* *
-\subsection{Value declarations}
+\subsection{Source code declarations}
%* *
%*********************************************************
-- The decls get reversed, but that's ok
rnSourceDecls gbl_env local_fixity_env decls
- = initRnMS gbl_env local_fixity_env SourceMode (go emptyFVs [] decls)
+ = initRnMS gbl_env emptyRdrEnv local_fixity_env SourceMode (go emptyFVs [] decls)
where
-- Fixity and deprecations have been dealt with already; ignore them
go fvs ds' [] = returnRn (ds', fvs)
go fvs ds' (DeprecD _:ds) = go fvs ds' ds
go fvs ds' (d:ds) = rnSourceDecl d `thenRn` \(d', fvs') ->
go (fvs `plusFV` fvs') (d':ds') ds
-\end{code}
-
-%*********************************************************
-%* *
-\subsection{Value declarations}
-%* *
-%*********************************************************
-\begin{code}
--- rnSourceDecl does all the work
rnSourceDecl :: RdrNameHsDecl -> RnMS (RenamedHsDecl, FreeVars)
rnSourceDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) ->
returnRn (ValD new_binds, fvs)
rnSourceDecl (TyClD tycl_decl)
- = rnTyClDecl tycl_decl `thenRn` \ new_decl ->
- rnClassBinds tycl_decl new_decl `thenRn` \ (new_decl', fvs) ->
- traceRn (text "rnClassDecl:" <+> (ppr (nameSetToList (tyClDeclFVs new_decl')) $$
- ppr (nameSetToList fvs))) `thenRn_`
+ = rnTyClDecl tycl_decl `thenRn` \ new_decl ->
+ finishSourceTyClDecl tycl_decl new_decl `thenRn` \ (new_decl', fvs) ->
returnRn (TyClD new_decl', fvs `plusFV` tyClDeclFVs new_decl')
rnSourceDecl (InstD inst)
- = rnInstDecl inst `thenRn` \ new_inst ->
- rnInstBinds inst new_inst `thenRn` \ (new_inst', fvs) ->
+ = rnInstDecl inst `thenRn` \ new_inst ->
+ finishSourceInstDecl inst new_inst `thenRn` \ (new_inst', fvs) ->
returnRn (InstD new_inst', fvs `plusFV` instDeclFVs new_inst')
rnSourceDecl (RuleD rule)
= rnHsRuleDecl rule `thenRn` \ (new_rule, fvs) ->
returnRn (RuleD new_rule, fvs)
+rnSourceDecl (ForD ford)
+ = rnHsForeignDecl ford `thenRn` \ (new_ford, fvs) ->
+ returnRn (ForD new_ford, fvs)
+
rnSourceDecl (DefD (DefaultDecl tys src_loc))
= pushSrcLocRn src_loc $
mapFvRn (rnHsTypeFVs doc_str) tys `thenRn` \ (tys', fvs) ->
returnRn (DefD (DefaultDecl tys' src_loc), fvs)
where
- doc_str = text "a `default' declaration"
+ doc_str = text "In a `default' declaration"
+\end{code}
-rnSourceDecl (ForD (ForeignDecl name imp_exp ty ext_nm cconv src_loc))
- = pushSrcLocRn src_loc $
- lookupOccRn name `thenRn` \ name' ->
- let
- extra_fvs FoExport
- | isDyn = lookupOrigNames [newStablePtr_RDR, deRefStablePtr_RDR,
- bindIO_RDR, returnIO_RDR]
- | otherwise =
- lookupOrigNames [bindIO_RDR, returnIO_RDR] `thenRn` \ fvs ->
- returnRn (addOneFV fvs name')
- extra_fvs other = returnRn emptyFVs
- in
- checkRn (ok_ext_nm ext_nm) (badExtName ext_nm) `thenRn_`
- extra_fvs imp_exp `thenRn` \ fvs1 ->
+%*********************************************************
+%* *
+\subsection{Foreign declarations}
+%* *
+%*********************************************************
+
+\begin{code}
+rnHsForeignDecl (ForeignImport name ty spec src_loc)
+ = pushSrcLocRn src_loc $
+ lookupOccRn name `thenRn` \ name' ->
+ rnHsTypeFVs (fo_decl_msg name) ty `thenRn` \ (ty', fvs1) ->
+ lookupOrigNames (extras spec) `thenRn` \ fvs2 ->
+ returnRn (ForeignImport name' ty' spec src_loc, fvs1 `plusFV` fvs2)
+ where
+ extras (CDynImport _) = [newStablePtr_RDR, deRefStablePtr_RDR, bindIO_RDR, returnIO_RDR]
+ extras other = []
- rnHsTypeFVs fo_decl_msg ty `thenRn` \ (ty', fvs2) ->
- returnRn (ForD (ForeignDecl name' imp_exp ty' ext_nm cconv src_loc),
- fvs1 `plusFV` fvs2)
- where
- fo_decl_msg = ptext SLIT("The foreign declaration for") <+> ppr name
- isDyn = isDynamicExtName ext_nm
+rnHsForeignDecl (ForeignExport name ty spec src_loc)
+ = pushSrcLocRn src_loc $
+ lookupOccRn name `thenRn` \ name' ->
+ rnHsTypeFVs (fo_decl_msg name) ty `thenRn` \ (ty', fvs1) ->
+ lookupOrigNames [bindIO_RDR, returnIO_RDR] `thenRn` \ fvs2 ->
+ returnRn (ForeignExport name' ty' spec src_loc, fvs1 `plusFV` fvs2)
- ok_ext_nm Dynamic = True
- ok_ext_nm (ExtName nm (Just mb)) = isCLabelString nm && isCLabelString mb
- ok_ext_nm (ExtName nm Nothing) = isCLabelString nm
+fo_decl_msg name = ptext SLIT("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
= pushSrcLocRn src_loc $
rnHsSigType (text "an instance decl") inst_ty `thenRn` \ inst_ty' ->
-- The typechecker checks that all the bindings are for the right class.
returnRn (InstDecl inst_ty' EmptyMonoBinds [] maybe_dfun_name src_loc)
--- Compare rnClassBinds
-rnInstBinds (InstDecl _ mbinds uprags _ _ )
- (InstDecl inst_ty _ _ maybe_dfun_rdr_name src_loc)
- = let
- meth_doc = text "the bindings in an instance declaration"
+-- 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 = case inst_ty of
HsForAllTy (Just inst_tyvars) _ _ -> inst_tyvars
renameSigsFVs (okInstDclSig binder_set) uprags
) `thenRn` \ (uprags', prag_fvs) ->
- returnRn (InstDecl inst_ty mbinds' uprags' maybe_dfun_rdr_name src_loc,
+ returnRn (InstDecl inst_ty mbinds' uprags' maybe_dfun_name src_loc,
meth_fvs `plusFV` prag_fvs)
\end{code}
returnRn (HsRule rule_name sig_tvs' vars' lhs' rhs' src_loc,
fv_vars `plusFV` fv_lhs `plusFV` fv_rhs)
where
- doc = text "the transformation rule" <+> ptext rule_name
+ doc = text "In the transformation rule" <+> ptext rule_name
sig_tvs = extractRuleBndrsTyVars vars
get_var (RuleBndr v) = v
mapRn rnIdInfo id_infos `thenRn` \ id_infos' ->
returnRn (IfaceSig {tcdName = name', tcdType = ty', tcdIdInfo = id_infos', tcdLoc = loc})
where
- doc_str = text "the interface signature for" <+> quotes (ppr name)
+ doc_str = text "In the interface signature for" <+> quotes (ppr name)
+
+rnTyClDecl (ForeignType {tcdName = name, tcdFoType = fo_type, tcdExtName = ext_name, tcdLoc = loc})
+ = pushSrcLocRn loc $
+ lookupTopBndrRn name `thenRn` \ name' ->
+ returnRn (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, tcdNCons = nconstrs,
- tcdDerivs = derivings, tcdLoc = src_loc, tcdSysNames = sys_names})
+ tcdLoc = src_loc, tcdSysNames = sys_names})
= pushSrcLocRn src_loc $
lookupTopBndrRn tycon `thenRn` \ tycon' ->
bindTyVarsRn data_doc tyvars $ \ tyvars' ->
rnContext data_doc context `thenRn` \ context' ->
checkDupOrQualNames data_doc con_names `thenRn_`
+
+ -- Check that there's at least one condecl,
+ -- or else we're reading an interface file, or -fglasgow-exts
+ (if null condecls then
+ doptRn Opt_GlasgowExts `thenRn` \ glaExts ->
+ getModeRn `thenRn` \ mode ->
+ checkRn (glaExts || isInterfaceMode mode)
+ (emptyConDeclsErr tycon)
+ else returnRn ()
+ ) `thenRn_`
+
mapRn rnConDecl condecls `thenRn` \ condecls' ->
mapRn lookupSysBinder sys_names `thenRn` \ sys_names' ->
- rnDerivs derivings `thenRn` \ derivings' ->
returnRn (TyData {tcdND = new_or_data, tcdCtxt = context', tcdName = tycon',
tcdTyVars = tyvars', tcdCons = condecls', tcdNCons = nconstrs,
- tcdDerivs = derivings', tcdLoc = src_loc, tcdSysNames = sys_names'})
+ tcdDerivs = Nothing, tcdLoc = src_loc, tcdSysNames = sys_names'})
where
- data_doc = text "the data type declaration for" <+> quotes (ppr tycon)
+ data_doc = text "In the data type declaration for" <+> quotes (ppr tycon)
con_names = map conDeclName condecls
rnTyClDecl (TySynonym {tcdName = name, tcdTyVars = tyvars, tcdSynRhs = ty, tcdLoc = src_loc})
rnHsType syn_doc (unquantify glaExts ty) `thenRn` \ ty' ->
returnRn (TySynonym {tcdName = name', tcdTyVars = tyvars', tcdSynRhs = ty', tcdLoc = src_loc})
where
- syn_doc = text "the declaration for type synonym" <+> quotes (ppr name)
+ syn_doc = text "In the declaration for type synonym" <+> quotes (ppr name)
-- For H98 we do *not* universally quantify on the RHS of a synonym
-- Silently discard context... but the tyvars in the rest won't be in scope
-- In interface files all types are quantified, so this is a no-op
unquantify glaExts (HsForAllTy Nothing ctxt ty) | glaExts = ty
- unquantify glaExys ty = ty
+ unquantify glaExts ty = ty
rnTyClDecl (ClassDecl {tcdCtxt = context, tcdName = cname,
tcdTyVars = tyvars, tcdFDs = fds, tcdSigs = sigs,
tcdSysNames = names, tcdLoc = src_loc})
+ -- Used for both source and interface file decls
= pushSrcLocRn src_loc $
lookupTopBndrRn cname `thenRn` \ cname' ->
tcdFDs = fds', tcdSigs = non_ops' ++ sigs', tcdMeths = Nothing,
tcdSysNames = names', tcdLoc = src_loc})
where
- cls_doc = text "the declaration for class" <+> ppr cname
- sig_doc = text "the signatures for class" <+> ppr cname
+ cls_doc = text "In the declaration for class" <+> ppr cname
+ sig_doc = text "In the signatures for class" <+> ppr cname
rnClassOp clas clas_tyvars clas_fds sig@(ClassOpSig op dm_stuff ty locn)
= pushSrcLocRn locn $
returnRn (ClassOpSig op_name dm_stuff' new_ty locn)
-rnClassBinds :: RdrNameTyClDecl -> RenamedTyClDecl -> RnMS (RenamedTyClDecl, FreeVars)
-rnClassBinds (ClassDecl {tcdMeths = Nothing})
- rn_cls_decl@(ClassDecl {tcdSigs = sigs})
- -- No method bindings, so this class decl comes from an interface file,
- -- However we want to treat the default-method names as free (they should
- -- be defined somewhere else). [In source code this is not so; the class
- -- decl will bind whatever default-methods are necessary.]
- = returnRn (rn_cls_decl, mkFVs [v | ClassOpSig _ (DefMeth v) _ _ <- sigs])
-
-rnClassBinds (ClassDecl {tcdMeths = Just mbinds}) -- Get mbinds from here
- rn_cls_decl@(ClassDecl {tcdTyVars = tyvars, tcdLoc = src_loc}) -- Everything else is here
+finishSourceTyClDecl :: RdrNameTyClDecl -> RenamedTyClDecl -> RnMS (RenamedTyClDecl, FreeVars)
+ -- Used for source file decls only
+ -- Renames the default-bindings of a class decl
+ -- the derivings of a data decl
+finishSourceTyClDecl (TyData {tcdDerivs = Just derivs, tcdLoc = src_loc}) -- Derivings in here
+ rn_ty_decl -- Everything else is here
+ = pushSrcLocRn src_loc $
+ mapRn rnDeriv derivs `thenRn` \ derivs' ->
+ returnRn (rn_ty_decl {tcdDerivs = Just derivs'}, mkNameSet derivs')
+
+finishSourceTyClDecl (ClassDecl {tcdMeths = Just mbinds, tcdLoc = src_loc}) -- Get mbinds from here
+ rn_cls_decl@(ClassDecl {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
-- we want to name both "x" tyvars with the same unique, so that they are
-- easy to group together in the typechecker.
-- Hence the
+ pushSrcLocRn src_loc $
extendTyVarEnvFVRn (map hsTyVarName tyvars) $
getLocalNameEnv `thenRn` \ name_env ->
let
rnMethodBinds gen_tyvars mbinds `thenRn` \ (mbinds', meth_fvs) ->
returnRn (rn_cls_decl {tcdMeths = Just mbinds'}, meth_fvs)
where
- meth_doc = text "the default-methods for class" <+> ppr (tcdName rn_cls_decl)
+ meth_doc = text "In the default-methods for class" <+> ppr (tcdName rn_cls_decl)
-rnClassBinds _ tycl_decl = returnRn (tycl_decl, emptyFVs)
- -- Not a class declaration
+finishSourceTyClDecl _ tycl_decl = returnRn (tycl_decl, emptyFVs)
+ -- Not a class or data type declaration
\end{code}
%*********************************************************
\begin{code}
-rnDerivs :: Maybe [RdrName] -> RnMS (Maybe [Name])
-
-rnDerivs Nothing -- derivs not specified
- = returnRn Nothing
-
-rnDerivs (Just clss)
- = mapRn do_one clss `thenRn` \ clss' ->
- returnRn (Just clss')
- where
- do_one cls = lookupOccRn cls `thenRn` \ clas_name ->
- checkRn (getUnique clas_name `elem` derivableClassKeys)
- (derivingNonStdClassErr clas_name) `thenRn_`
- returnRn clas_name
+rnDeriv :: RdrName -> RnMS Name
+rnDeriv cls
+ = lookupOccRn cls `thenRn` \ clas_name ->
+ checkRn (getUnique clas_name `elem` derivableClassKeys)
+ (derivingNonStdClassErr clas_name) `thenRn_`
+ returnRn clas_name
\end{code}
\begin{code}
rnConDetails doc locn details `thenRn` \ new_details ->
returnRn (ConDecl new_name new_wkr new_tyvars new_context new_details locn)
where
- doc = text "the definition of data constructor" <+> quotes (ppr name)
+ doc = text "In the definition of data constructor" <+> quotes (ppr name)
rnConDetails doc locn (VanillaCon tys)
= mapRn (rnBangTy doc) tys `thenRn` \ new_tys ->
rnBangTy doc ty `thenRn` \ new_ty ->
returnRn (new_names, new_ty)
-rnBangTy doc (Banged ty)
+rnBangTy doc (BangType s ty)
= rnHsType doc ty `thenRn` \ new_ty ->
- returnRn (Banged new_ty)
-
-rnBangTy doc (Unbanged ty)
- = rnHsType doc ty `thenRn` \ new_ty ->
- returnRn (Unbanged new_ty)
-
-rnBangTy doc (Unpacked ty)
- = rnHsType doc ty `thenRn` \ new_ty ->
- returnRn (Unpacked new_ty)
+ returnRn (BangType s new_ty)
-- This data decl will parse OK
-- data T = a Int
-- rnHsSigType is used for source-language type signatures,
-- which use *implicit* universal quantification.
rnHsSigType doc_str ty
- = rnHsType (text "the type signature for" <+> doc_str) ty
+ = rnHsType (text "In the type signature for" <+> doc_str) ty
---------------------------------------
rnHsType :: SDoc -> RdrNameHsType -> RnMS RenamedHsType
rnContext :: SDoc -> RdrNameContext -> RnMS RenamedContext
rnContext doc ctxt
= mapRn rn_pred ctxt `thenRn` \ theta ->
- let
- (_, dups) = removeDupsEq theta
- -- We only have equality, not ordering
- in
+
-- Check for duplicate assertions
-- If this isn't an error, then it ought to be:
- mapRn (addWarnRn . dupClassAssertWarn theta) dups `thenRn_`
+ ifOptRn Opt_WarnMisc (
+ let
+ (_, dups) = removeDupsEq theta
+ -- We only have equality, not ordering
+ in
+ mapRn (addWarnRn . dupClassAssertWarn theta) dups
+ ) `thenRn_`
+
returnRn theta
where
--Someone discovered that @CCallable@ and @CReturnable@
(naughtyCCallContextErr pred') `thenRn_`
returnRn pred'
- bad_pred (HsPClass clas _) = getUnique clas `elem` cCallishClassKeys
+ bad_pred (HsClassP clas _) = getUnique clas `elem` cCallishClassKeys
bad_pred other = False
-rnPred doc (HsPClass clas tys)
+rnPred doc (HsClassP clas tys)
= lookupOccRn clas `thenRn` \ clas_name ->
rnHsTypes doc tys `thenRn` \ tys' ->
- returnRn (HsPClass clas_name tys')
+ returnRn (HsClassP clas_name tys')
-rnPred doc (HsPIParam n ty)
+rnPred doc (HsIParam n ty)
= newIPName n `thenRn` \ name ->
rnHsType doc ty `thenRn` \ ty' ->
- returnRn (HsPIParam name ty')
+ returnRn (HsIParam name ty')
\end{code}
\begin{code}
%*********************************************************
\begin{code}
-rnIdInfo (HsWorker worker)
+rnIdInfo (HsWorker worker arity)
= lookupOccRn worker `thenRn` \ worker' ->
- returnRn (HsWorker worker')
+ returnRn (HsWorker worker' arity)
rnIdInfo (HsUnfold inline expr) = rnCoreExpr expr `thenRn` \ expr' ->
returnRn (HsUnfold inline expr')
rnIdInfo (HsStrictness str) = returnRn (HsStrictness str)
rnIdInfo (HsArity arity) = returnRn (HsArity arity)
rnIdInfo HsNoCafRefs = returnRn HsNoCafRefs
-rnIdInfo HsCprInfo = returnRn HsCprInfo
\end{code}
@UfCore@ expressions.
= rnHsType (text "litlit") ty `thenRn` \ ty' ->
returnRn (UfLitLit l ty')
-rnCoreExpr (UfCCall cc ty)
+rnCoreExpr (UfFCall cc ty)
= rnHsType (text "ccall") ty `thenRn` \ ty' ->
- returnRn (UfCCall cc ty')
+ returnRn (UfFCall cc ty')
rnCoreExpr (UfTuple (HsTupCon _ boxity arity) args)
= mapRn rnCoreExpr args `thenRn` \ args' ->
validRuleLhs foralls lhs
= check lhs
where
+ check (OpApp _ op _ _) = check op
check (HsApp e1 e2) = check e1
check (HsVar v) | v `notElem` foralls = True
check other = False
= hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
forAllWarn doc ty tyvar
- = doptRn Opt_WarnUnusedMatches `thenRn` \ warn_unused -> case () of
- () | not warn_unused -> returnRn ()
- | otherwise
- -> getModeRn `thenRn` \ mode ->
- case mode of {
+ = ifOptRn Opt_WarnUnusedMatches $
+ getModeRn `thenRn` \ mode ->
+ case mode of {
#ifndef DEBUG
InterfaceMode -> returnRn () ; -- Don't warn of unused tyvars in interface files
-- unless DEBUG is on, in which case it is slightly
sep [ptext SLIT("The universally quantified type variable") <+> quotes (ppr tyvar),
nest 4 (ptext SLIT("does not appear in the type") <+> quotes (ppr ty))]
$$
- (ptext SLIT("In") <+> doc)
+ doc
)
}
ptext SLIT("LHS must be of form (f e1 .. en) where f is not forall'd")
badRuleVar name var
- = sep [ptext SLIT("Rule") <+> ptext name <> colon,
+ = sep [ptext SLIT("Rule") <+> doubleQuotes (ptext name) <> colon,
ptext SLIT("Forall'd variable") <+> quotes (ppr var) <+>
ptext SLIT("does not appear on left hand side")]
-badExtName :: ExtName -> Message
-badExtName ext_nm
- = sep [quotes (ppr ext_nm) <+> ptext SLIT("is not a valid C identifier")]
-
dupClassAssertWarn ctxt (assertion : dups)
= sep [hsep [ptext SLIT("Duplicate class assertion"),
quotes (ppr assertion),
ptext SLIT("in the context:")],
nest 4 (pprHsContext ctxt <+> ptext SLIT("..."))]
-naughtyCCallContextErr (HsPClass clas _)
+naughtyCCallContextErr (HsClassP clas _)
= sep [ptext SLIT("Can't use class") <+> quotes (ppr clas),
ptext SLIT("in a context")]
+emptyConDeclsErr tycon
+ = sep [quotes (ppr tycon) <+> ptext SLIT("has no constructors"),
+ nest 4 (ptext SLIT("(-fglasgow-exts permits this)"))]
\end{code}
projects / ghc-hetmet.git / blobdiff