\section[RnSource]{Main pass of renamer}
\begin{code}
-module RnSource ( rnDecl, rnTyClDecl, rnIfaceRuleDecl, rnInstDecl, rnSourceDecls,
+module RnSource ( rnTyClDecl, rnIfaceRuleDecl, rnInstDecl, rnSourceDecls,
rnHsType, rnHsSigType, rnHsTypeFVs, rnHsSigTypeFVs
) where
import RnExpr
import HsSyn
+import HscTypes ( GlobalRdrEnv )
import HsTypes ( hsTyVarNames, pprHsContext )
-import RdrName ( RdrName, isRdrDataCon, rdrNameOcc, mkRdrNameWkr, elemRdrEnv )
+import RdrName ( RdrName, isRdrDataCon, elemRdrEnv )
import RdrHsSyn ( RdrNameContext, RdrNameHsType, RdrNameConDecl, RdrNameTyClDecl,
extractRuleBndrsTyVars, extractHsTyRdrTyVars,
extractHsCtxtRdrTyVars, extractGenericPatTyVars
import RnMonad
import Class ( FunDep, DefMeth (..) )
-import Name ( Name, OccName, nameOccName, NamedThing(..) )
+import DataCon ( dataConId )
+import Name ( Name, NamedThing(..) )
import NameSet
import PrelInfo ( derivableClassKeys, cCallishClassKeys )
import PrelNames ( deRefStablePtr_RDR, newStablePtr_RDR,
bindIO_RDR, returnIO_RDR
)
+import TysWiredIn ( tupleCon )
import List ( partition, nub )
import Outputable
import SrcLoc ( SrcLoc )
import CmdLineOpts ( DynFlag(..) )
-- Warn of unused for-all'd tyvars
import Unique ( Uniquable(..) )
+import Maybes ( maybeToBool )
import ErrUtils ( Message )
import CStrings ( isCLabelString )
import ListSetOps ( removeDupsEq )
\end{code}
-@rnDecl@ `renames' declarations.
+@rnSourceDecl@ `renames' declarations.
It simultaneously performs dependency analysis and precedence parsing.
It also does the following error checks:
\begin{enumerate}
%*********************************************************
%* *
-\subsection{Value declarations}
+\subsection{Source code declarations}
%* *
%*********************************************************
\begin{code}
-rnSourceDecls :: [RdrNameHsDecl] -> RnMS ([RenamedHsDecl], FreeVars)
+rnSourceDecls :: GlobalRdrEnv -> LocalFixityEnv
+ -> [RdrNameHsDecl]
+ -> RnMG ([RenamedHsDecl], FreeVars)
-- The decls get reversed, but that's ok
-rnSourceDecls decls
- = go emptyFVs [] decls
+rnSourceDecls gbl_env local_fixity_env 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' (FixD _:ds) = go fvs ds' ds
go fvs ds' (DeprecD _:ds) = go fvs ds' ds
- go fvs ds' (d:ds) = rnDecl d `thenRn` \(d', fvs') ->
+ go fvs ds' (d:ds) = rnSourceDecl d `thenRn` \(d', fvs') ->
go (fvs `plusFV` fvs') (d':ds') ds
-\end{code}
-%*********************************************************
-%* *
-\subsection{Value declarations}
-%* *
-%*********************************************************
-
-\begin{code}
--- rnDecl does all the work
-rnDecl :: RdrNameHsDecl -> RnMS (RenamedHsDecl, FreeVars)
+rnSourceDecl :: RdrNameHsDecl -> RnMS (RenamedHsDecl, FreeVars)
-rnDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) ->
- returnRn (ValD new_binds, fvs)
+rnSourceDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) ->
+ returnRn (ValD new_binds, fvs)
-rnDecl (TyClD tycl_decl)
- = rnTyClDecl tycl_decl `thenRn` \ new_decl ->
- rnClassBinds tycl_decl new_decl `thenRn` \ (new_decl', fvs) ->
+rnSourceDecl (TyClD tycl_decl)
+ = rnTyClDecl tycl_decl `thenRn` \ new_decl ->
+ finishSourceTyClDecl tycl_decl new_decl `thenRn` \ (new_decl', fvs) ->
returnRn (TyClD new_decl', fvs `plusFV` tyClDeclFVs new_decl')
-rnDecl (InstD inst)
- = rnInstDecl inst `thenRn` \ new_inst ->
- rnInstBinds inst new_inst `thenRn` \ (new_inst', fvs) ->
+rnSourceDecl (InstD inst)
+ = rnInstDecl inst `thenRn` \ new_inst ->
+ finishSourceInstDecl inst new_inst `thenRn` \ (new_inst', fvs) ->
returnRn (InstD new_inst', fvs `plusFV` instDeclFVs new_inst')
-rnDecl (RuleD rule)
- | isIfaceRuleDecl rule
- = rnIfaceRuleDecl rule `thenRn` \ new_rule ->
- returnRn (RuleD new_rule, ruleDeclFVs new_rule)
- | otherwise
+rnSourceDecl (RuleD rule)
= rnHsRuleDecl rule `thenRn` \ (new_rule, fvs) ->
returnRn (RuleD new_rule, fvs)
-rnDecl (DefD (DefaultDecl tys src_loc))
+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"
-rnDecl (ForD (ForeignDecl name imp_exp ty ext_nm cconv src_loc))
+rnSourceDecl (ForD (ForeignDecl name imp_exp ty ext_nm cconv src_loc))
= pushSrcLocRn src_loc $
lookupOccRn name `thenRn` \ name' ->
let
\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
+-- 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 "the bindings in an instance declaration"
meth_names = collectLocatedMonoBinders mbinds
inst_tyvars = case inst_ty of
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}
However, we can also do some scoping checks at the same time.
\begin{code}
-rnTyClDecl (IfaceSig name ty id_infos loc)
+rnTyClDecl (IfaceSig {tcdName = name, tcdType = ty, tcdIdInfo = id_infos, tcdLoc = loc})
= pushSrcLocRn loc $
lookupTopBndrRn name `thenRn` \ name' ->
rnHsType doc_str ty `thenRn` \ ty' ->
mapRn rnIdInfo id_infos `thenRn` \ id_infos' ->
- returnRn (IfaceSig name' ty' id_infos' loc)
+ returnRn (IfaceSig {tcdName = name', tcdType = ty', tcdIdInfo = id_infos', tcdLoc = loc})
where
doc_str = text "the interface signature for" <+> quotes (ppr name)
-rnTyClDecl (TyData new_or_data context tycon tyvars condecls nconstrs derivings src_loc gen_name1 gen_name2)
+rnTyClDecl (TyData {tcdND = new_or_data, tcdCtxt = context, tcdName = tycon,
+ tcdTyVars = tyvars, tcdCons = condecls, tcdNCons = nconstrs,
+ 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_`
mapRn rnConDecl condecls `thenRn` \ condecls' ->
- lookupSysBinder gen_name1 `thenRn` \ name1' ->
- lookupSysBinder gen_name2 `thenRn` \ name2' ->
- rnDerivs derivings `thenRn` \ derivings' ->
- returnRn (TyData new_or_data context' tycon' tyvars' condecls' nconstrs
- derivings' src_loc name1' name2')
+ mapRn lookupSysBinder sys_names `thenRn` \ sys_names' ->
+ returnRn (TyData {tcdND = new_or_data, tcdCtxt = context', tcdName = tycon',
+ tcdTyVars = tyvars', tcdCons = condecls', tcdNCons = nconstrs,
+ tcdDerivs = Nothing, tcdLoc = src_loc, tcdSysNames = sys_names'})
where
data_doc = text "the data type declaration for" <+> quotes (ppr tycon)
con_names = map conDeclName condecls
-rnTyClDecl (TySynonym name tyvars ty src_loc)
+rnTyClDecl (TySynonym {tcdName = name, tcdTyVars = tyvars, tcdSynRhs = ty, tcdLoc = src_loc})
= pushSrcLocRn src_loc $
doptRn Opt_GlasgowExts `thenRn` \ glaExts ->
lookupTopBndrRn name `thenRn` \ name' ->
bindTyVarsRn syn_doc tyvars $ \ tyvars' ->
rnHsType syn_doc (unquantify glaExts ty) `thenRn` \ ty' ->
- returnRn (TySynonym name' tyvars' ty' src_loc)
+ returnRn (TySynonym {tcdName = name', tcdTyVars = tyvars', tcdSynRhs = ty', tcdLoc = src_loc})
where
syn_doc = text "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 context cname tyvars fds sigs mbinds names src_loc)
+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' ->
-- The renamer *could* check this for class decls, but can't
-- for instance decls.
- returnRn (ClassDecl context' cname' tyvars' fds' (non_ops' ++ sigs') EmptyMonoBinds names' src_loc)
+ returnRn (ClassDecl { tcdCtxt = context', tcdName = cname', tcdTyVars = tyvars',
+ 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
-rnClassOp clas clas_tyvars clas_fds sig@(ClassOpSig op maybe_dm_stuff ty locn)
+rnClassOp clas clas_tyvars clas_fds sig@(ClassOpSig op dm_stuff ty locn)
= pushSrcLocRn locn $
lookupTopBndrRn op `thenRn` \ op_name ->
rnHsSigType (quotes (ppr op)) ty `thenRn` \ new_ty ->
-- Make the default-method name
- (case maybe_dm_stuff of
- Nothing -> returnRn Nothing -- Source-file class decl
-
- Just (DefMeth dm_rdr_name)
+ (case dm_stuff of
+ DefMeth dm_rdr_name
-> -- Imported class that has a default method decl
-- See comments with tname, snames, above
lookupSysBinder dm_rdr_name `thenRn` \ dm_name ->
- returnRn (Just (DefMeth dm_name))
+ returnRn (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
- Just GenDefMeth -> returnRn (Just GenDefMeth)
- Just NoDefMeth -> returnRn (Just NoDefMeth)
- ) `thenRn` \ maybe_dm_stuff' ->
+ GenDefMeth -> returnRn GenDefMeth
+ NoDefMeth -> returnRn NoDefMeth
+ ) `thenRn` \ dm_stuff' ->
- returnRn (ClassOpSig op_name maybe_dm_stuff' new_ty locn)
-
-rnClassBinds :: RdrNameTyClDecl -> RenamedTyClDecl -> RnMS (RenamedTyClDecl, FreeVars)
- -- Rename the mbinds only; the rest is done already
-rnClassBinds (ClassDecl _ _ _ _ _ mbinds _ _ ) -- Get mbinds from here
- (ClassDecl context cname tyvars fds sigs _ names src_loc) -- Everything else is here
+ returnRn (ClassOpSig op_name dm_stuff' new_ty locn)
+
+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
-- class C a where
-- op :: a -> a
-- 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
checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenRn_`
newLocalsRn gen_rdr_tyvars_w_locs `thenRn` \ gen_tyvars ->
rnMethodBinds gen_tyvars mbinds `thenRn` \ (mbinds', meth_fvs) ->
- returnRn (ClassDecl context cname tyvars fds sigs mbinds' names src_loc, meth_fvs)
+ returnRn (rn_cls_decl {tcdMeths = Just mbinds'}, meth_fvs)
where
- meth_doc = text "the default-methods for class" <+> ppr cname
+ meth_doc = text "the default-methods for class" <+> ppr (tcdName rn_cls_decl)
-rnClassBinds _ tycl_decl = returnRn (tycl_decl, emptyFVs)
+finishSourceTyClDecl _ tycl_decl = returnRn (tycl_decl, emptyFVs)
-- Not a class 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}
-- Unboxed tuples are allowed to have poly-typed arguments. These
-- sometimes crop up as a result of CPR worker-wrappering dictionaries.
-rnHsType doc (HsTupleTy (HsTupCon _ boxity) tys)
+rnHsType doc (HsTupleTy (HsTupCon _ boxity arity) tys)
-- Don't do lookupOccRn, because this is built-in syntax
-- so it doesn't need to be in scope
= mapRn (rnHsType doc) tys `thenRn` \ tys' ->
- returnRn (HsTupleTy (HsTupCon n' boxity) tys')
+ returnRn (HsTupleTy (HsTupCon tup_name boxity arity) tys')
where
- n' = tupleTyCon_name boxity (length tys)
+ tup_name = tupleTyCon_name boxity arity
rnHsType doc (HsAppTy ty1 ty2)
\end{code}
\begin{code}
--- We use lookupOcc here because this is interface file only stuff
--- and we need the workers...
-rnHsTupCon (HsTupCon n boxity)
- = lookupOccRn n `thenRn` \ n' ->
- returnRn (HsTupCon n' boxity)
-
-rnHsTupConWkr (HsTupCon n boxity)
- -- Tuple construtors are for the *worker* of the tuple
- -- Going direct saves needless messing about
- = lookupOccRn (mkRdrNameWkr n) `thenRn` \ n' ->
- returnRn (HsTupCon n' boxity)
-\end{code}
-
-\begin{code}
rnForAll doc forall_tyvars ctxt ty
= bindTyVarsRn doc forall_tyvars $ \ new_tyvars ->
rnContext doc ctxt `thenRn` \ new_ctxt ->
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')
= rnHsType (text "ccall") ty `thenRn` \ ty' ->
returnRn (UfCCall cc ty')
-rnCoreExpr (UfTuple con args)
- = rnHsTupConWkr con `thenRn` \ con' ->
- mapRn rnCoreExpr args `thenRn` \ args' ->
- returnRn (UfTuple con' args')
+rnCoreExpr (UfTuple (HsTupCon _ boxity arity) args)
+ = mapRn rnCoreExpr args `thenRn` \ args' ->
+ returnRn (UfTuple (HsTupCon tup_name boxity arity) args')
+ where
+ tup_name = getName (dataConId (tupleCon boxity arity))
+ -- Get the *worker* name and use that
rnCoreExpr (UfApp fun arg)
= rnCoreExpr fun `thenRn` \ fun' ->
\begin{code}
rnCoreAlt (con, bndrs, rhs)
- = rnUfCon con bndrs `thenRn` \ con' ->
+ = rnUfCon con `thenRn` \ con' ->
bindCoreLocalsRn bndrs $ \ bndrs' ->
rnCoreExpr rhs `thenRn` \ rhs' ->
returnRn (con', bndrs', rhs')
rnNote UfInlineMe = returnRn UfInlineMe
-rnUfCon UfDefault _
+rnUfCon UfDefault
= returnRn UfDefault
-rnUfCon (UfTupleAlt tup_con) bndrs
- = rnHsTupCon tup_con `thenRn` \ (HsTupCon con' _) ->
- returnRn (UfDataAlt con')
- -- Makes the type checker a little easier
+rnUfCon (UfTupleAlt (HsTupCon _ boxity arity))
+ = returnRn (UfTupleAlt (HsTupCon tup_name boxity arity))
+ where
+ tup_name = getName (tupleCon boxity arity)
-rnUfCon (UfDataAlt con) _
+rnUfCon (UfDataAlt con)
= lookupOccRn con `thenRn` \ con' ->
returnRn (UfDataAlt con')
-rnUfCon (UfLitAlt lit) _
+rnUfCon (UfLitAlt lit)
= returnRn (UfLitAlt lit)
-rnUfCon (UfLitLitAlt lit ty) _
+rnUfCon (UfLitLitAlt lit ty)
= rnHsType (text "litlit") ty `thenRn` \ ty' ->
returnRn (UfLitLitAlt lit ty')
\end{code}
= 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
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")]
\end{code}
projects / ghc-hetmet.git / blobdiff