\section[RnSource]{Main pass of renamer}
\begin{code}
-module RnSource ( rnDecl, rnSourceDecls, rnHsType, rnHsSigType ) where
+module RnSource ( rnTyClDecl, rnIfaceRuleDecl, rnInstDecl, rnSourceDecls,
+ ) where
#include "HsVersions.h"
import RnExpr
import HsSyn
-import HsPragmas
-import HsTypes ( hsTyVarNames, pprHsContext )
-import RdrName ( RdrName, isRdrDataCon, rdrNameOcc, mkRdrNameWkr )
-import RdrHsSyn ( RdrNameContext, RdrNameHsType, RdrNameConDecl,
- extractRuleBndrsTyVars, extractHsTyRdrTyVars,
- extractHsCtxtRdrTyVars
+import HscTypes ( GlobalRdrEnv, AvailEnv )
+import RdrName ( RdrName, isRdrDataCon, elemRdrEnv )
+import RdrHsSyn ( RdrNameConDecl, RdrNameTyClDecl,
+ extractGenericPatTyVars
)
import RnHsSyn
import HsCore
-import RnBinds ( rnTopBinds, rnMethodBinds, renameSigs )
-import RnEnv ( lookupTopBndrRn, lookupOccRn, newIPName,
- lookupOrigNames, lookupSysBinder,
- bindLocalsFVRn, bindUVarRn,
- bindTyVarsFVRn, bindTyVarsFV2Rn, extendTyVarEnvFVRn,
- bindCoreLocalFVRn, bindCoreLocalsFVRn, bindLocalNames,
- checkDupOrQualNames, checkDupNames,
- FreeVars, emptyFVs, plusFV, plusFVs, unitFV,
- addOneFV, mapFvRn
+import RnTypes ( rnHsType, rnHsSigType, rnHsTypeFVs, rnContext )
+
+import RnBinds ( rnTopBinds, rnMethodBinds, renameSigs, renameSigsFVs )
+import RnEnv ( lookupTopBndrRn, lookupOccRn, lookupIfaceName,
+ lookupOrigNames, lookupSysBinder, newLocalsRn,
+ bindLocalsFVRn, bindPatSigTyVars,
+ bindTyVarsRn, extendTyVarEnvFVRn,
+ bindCoreLocalRn, bindCoreLocalsRn, bindLocalNames,
+ checkDupOrQualNames, checkDupNames, mapFvRn
)
import RnMonad
-import FunDeps ( oclose )
-import Class ( FunDep )
-import Name ( Name, OccName, nameOccName, NamedThing(..) )
+import Class ( FunDep, DefMeth (..) )
+import DataCon ( dataConId )
+import Name ( Name, NamedThing(..) )
import NameSet
-import FiniteMap ( elemFM )
-import PrelInfo ( derivableClassKeys, cCallishClassKeys,
- deRefStablePtr_RDR, makeStablePtr_RDR,
- bindIO_RDR, returnIO_RDR
+import PrelInfo ( derivableClassKeys )
+import PrelNames ( deRefStablePtrName, newStablePtrName,
+ bindIOName, returnIOName
)
-import Bag ( bagToList )
-import List ( partition, nub )
+import TysWiredIn ( tupleCon )
+import List ( partition )
import Outputable
import SrcLoc ( SrcLoc )
-import CmdLineOpts ( opt_GlasgowExts, opt_WarnUnusedMatches ) -- Warn of unused for-all'd tyvars
+import CmdLineOpts ( DynFlag(..) )
+ -- Warn of unused for-all'd tyvars
import Unique ( Uniquable(..) )
-import ErrUtils ( Message )
-import CStrings ( isCLabelString )
-import Util
+import Maybes ( maybeToBool )
\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 -> AvailEnv -> LocalFixityEnv
+ -> [RdrNameHsDecl]
+ -> RnMG ([RenamedHsDecl], FreeVars)
-- The decls get reversed, but that's ok
-rnSourceDecls decls
- = go emptyFVs [] decls
+rnSourceDecls gbl_env avails local_fixity_env decls
+ = initRnMS gbl_env avails 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}
-%* *
-%*********************************************************
+rnSourceDecl :: RdrNameHsDecl -> RnMS (RenamedHsDecl, FreeVars)
-\begin{code}
--- rnDecl does all the work
-rnDecl :: RdrNameHsDecl -> RnMS (RenamedHsDecl, FreeVars)
+rnSourceDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) ->
+ returnRn (ValD new_binds, fvs)
-rnDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) ->
- returnRn (ValD new_binds, 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')
+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 (SigD (IfaceSig name ty id_infos loc))
- = pushSrcLocRn loc $
- lookupTopBndrRn name `thenRn` \ name' ->
- rnHsType doc_str ty `thenRn` \ (ty',fvs1) ->
- mapFvRn rnIdInfo id_infos `thenRn` \ (id_infos', fvs2) ->
- returnRn (SigD (IfaceSig name' ty' id_infos' loc), fvs1 `plusFV` fvs2)
+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 "the interface signature for" <+> quotes (ppr name)
+ doc_str = text "In a `default' declaration"
\end{code}
+
%*********************************************************
%* *
-\subsection{Type declarations}
+\subsection{Foreign 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}
-rnDecl (TyClD (TyData new_or_data context tycon tyvars condecls nconstrs derivings pragmas src_loc))
- = pushSrcLocRn src_loc $
- lookupTopBndrRn tycon `thenRn` \ tycon' ->
- bindTyVarsFVRn data_doc tyvars $ \ tyvars' ->
- rnContext data_doc context `thenRn` \ (context', cxt_fvs) ->
- checkDupOrQualNames data_doc con_names `thenRn_`
- mapFvRn rnConDecl condecls `thenRn` \ (condecls', con_fvs) ->
- rnDerivs derivings `thenRn` \ (derivings', deriv_fvs) ->
- ASSERT(isNoDataPragmas pragmas)
- returnRn (TyClD (TyData new_or_data context' tycon' tyvars' condecls' nconstrs
- derivings' noDataPragmas src_loc),
- cxt_fvs `plusFV` con_fvs `plusFV` deriv_fvs)
- where
- data_doc = text "the data type declaration for" <+> quotes (ppr tycon)
- con_names = map conDeclName condecls
-
-rnDecl (TyClD (TySynonym name tyvars ty src_loc))
- = pushSrcLocRn src_loc $
- lookupTopBndrRn name `thenRn` \ name' ->
- bindTyVarsFVRn syn_doc tyvars $ \ tyvars' ->
- rnHsType syn_doc (unquantify ty) `thenRn` \ (ty', ty_fvs) ->
- returnRn (TyClD (TySynonym name' tyvars' ty' src_loc), ty_fvs)
+rnHsForeignDecl (ForeignImport name ty spec isDeprec src_loc)
+ = pushSrcLocRn src_loc $
+ lookupTopBndrRn name `thenRn` \ name' ->
+ rnHsTypeFVs (fo_decl_msg name) ty `thenRn` \ (ty', fvs) ->
+ returnRn (ForeignImport name' ty' spec isDeprec src_loc,
+ fvs `plusFV` extras spec)
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
- unquantify (HsForAllTy Nothing ctxt ty) | not opt_GlasgowExts = ty
- unquantify ty = ty
-
-rnDecl (TyClD (ClassDecl context cname tyvars fds sigs mbinds pragmas
- tname dname dwname snames src_loc))
- = pushSrcLocRn src_loc $
-
- lookupTopBndrRn cname `thenRn` \ cname' ->
-
- -- Deal with the implicit tycon and datacon name
- -- They aren't in scope (because they aren't visible to the user)
- -- and what we want to do is simply look them up in the cache;
- -- we jolly well ought to get a 'hit' there!
- -- So the 'Imported' part of this call is not relevant.
- -- Unclean; but since these two are the only place this happens
- -- I can't work up the energy to do it more beautifully
- lookupSysBinder tname `thenRn` \ tname' ->
- lookupSysBinder dname `thenRn` \ dname' ->
- lookupSysBinder dwname `thenRn` \ dwname' ->
- mapRn lookupSysBinder snames `thenRn` \ snames' ->
-
- -- Tyvars scope over bindings and context
- bindTyVarsFV2Rn cls_doc tyvars ( \ clas_tyvar_names tyvars' ->
-
- -- Check the superclasses
- rnContext cls_doc context `thenRn` \ (context', cxt_fvs) ->
-
- -- Check the functional dependencies
- rnFds cls_doc fds `thenRn` \ (fds', fds_fvs) ->
-
- -- Check the signatures
- let
- -- First process the class op sigs, then the fixity sigs.
- (op_sigs, non_op_sigs) = partition isClassOpSig sigs
- in
- checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenRn_`
- mapFvRn (rn_op cname' clas_tyvar_names fds') op_sigs `thenRn` \ (sigs', sig_fvs) ->
- let
- binders = mkNameSet [ nm | (ClassOpSig nm _ _ _) <- sigs' ]
- in
- renameSigs (okClsDclSig binders) non_op_sigs `thenRn` \ (non_ops', fix_fvs) ->
-
- -- Check the methods
- checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenRn_`
- rnMethodBinds mbinds `thenRn` \ (mbinds', meth_fvs) ->
-
- -- 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.
-
- ASSERT(isNoClassPragmas pragmas)
- returnRn (TyClD (ClassDecl context' cname' tyvars' fds' (non_ops' ++ sigs') mbinds'
- NoClassPragmas tname' dname' dwname' snames' src_loc),
- sig_fvs `plusFV`
- fix_fvs `plusFV`
- cxt_fvs `plusFV`
- fds_fvs `plusFV`
- meth_fvs
- )
- )
- where
- cls_doc = text "the declaration for class" <+> ppr cname
- sig_doc = text "the signatures for class" <+> ppr cname
- meth_doc = text "the default-methods for class" <+> ppr cname
-
- sig_rdr_names_w_locs = [(op,locn) | ClassOpSig op _ _ locn <- sigs]
- meth_rdr_names_w_locs = bagToList (collectMonoBinders mbinds)
-
- rn_op clas clas_tyvars clas_fds sig@(ClassOpSig op maybe_dm_stuff ty locn)
- = pushSrcLocRn locn $
- lookupTopBndrRn op `thenRn` \ op_name ->
-
- -- Check the signature
- rnHsSigType (quotes (ppr op)) ty `thenRn` \ (new_ty, op_ty_fvs) ->
- let
- check_in_op_ty clas_tyvar =
- checkRn (clas_tyvar `elemNameSet` oclose clas_fds op_ty_fvs)
- (classTyVarNotInOpTyErr clas_tyvar sig)
- in
- mapRn_ check_in_op_ty clas_tyvars `thenRn_`
-
- -- Make the default-method name
- (case maybe_dm_stuff of
- Nothing -> returnRn (Nothing, emptyFVs) -- Source-file class decl
-
- Just (dm_rdr_name, explicit_dm)
- -> -- Imported class that has a default method decl
- -- See comments with tname, snames, above
- lookupSysBinder dm_rdr_name `thenRn` \ dm_name ->
- returnRn (Just (dm_name, explicit_dm),
- if explicit_dm then unitFV dm_name else emptyFVs)
- -- 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
- ) `thenRn` \ (maybe_dm_stuff', dm_fvs) ->
-
- returnRn (ClassOpSig op_name maybe_dm_stuff' new_ty locn, op_ty_fvs `plusFV` dm_fvs)
+ extras (CImport _ _ _ _ CWrapper) = mkFVs [newStablePtrName,
+ deRefStablePtrName,
+ bindIOName, returnIOName]
+ extras _ = emptyFVs
+
+rnHsForeignDecl (ForeignExport name ty spec isDeprec src_loc)
+ = pushSrcLocRn src_loc $
+ lookupOccRn name `thenRn` \ name' ->
+ rnHsTypeFVs (fo_decl_msg name) ty `thenRn` \ (ty', fvs) ->
+ returnRn (ForeignExport name' ty' spec isDeprec src_loc,
+ mkFVs [bindIOName, returnIOName] `plusFV` fvs)
+
+fo_decl_msg name = ptext SLIT("The foreign declaration for") <+> ppr name
\end{code}
%*********************************************************
\begin{code}
-rnDecl (InstD (InstDecl inst_ty mbinds uprags maybe_dfun_rdr_name src_loc))
+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', inst_fvs) ->
+ rnHsSigType (text "an instance decl") inst_ty `thenRn` \ inst_ty' ->
+
+ (case maybe_dfun_rdr_name of
+ Nothing -> returnRn Nothing
+ Just dfun_rdr_name -> lookupIfaceName dfun_rdr_name `thenRn` \ dfun_name ->
+ returnRn (Just dfun_name)
+ ) `thenRn` \ maybe_dfun_name ->
+
+ -- The typechecker checks that all the bindings are for the right class.
+ returnRn (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
- inst_tyvars = case inst_ty' of
- HsForAllTy (Just inst_tyvars) _ _ -> inst_tyvars
- other -> []
+ meth_doc = text "In the bindings in an instance declaration"
+ meth_names = collectLocatedMonoBinders mbinds
+ (inst_tyvars, (cls,_)) = getHsInstHead inst_ty
-- (Slightly strangely) the forall-d tyvars scope over
-- the method bindings too
in
-- Rename the bindings
-- NB meth_names can be qualified!
checkDupNames meth_doc meth_names `thenRn_`
- extendTyVarEnvFVRn inst_tyvars (
- rnMethodBinds mbinds
+ extendTyVarEnvFVRn (map hsTyVarName inst_tyvars) (
+ rnMethodBinds cls [] mbinds
) `thenRn` \ (mbinds', meth_fvs) ->
let
- binders = map fst (bagToList (collectMonoBinders mbinds'))
+ binders = collectMonoBinders mbinds'
binder_set = mkNameSet binders
in
-- Rename the prags and signatures.
--
-- But the (unqualified) method names are in scope
bindLocalNames binders (
- renameSigs (okInstDclSig binder_set) uprags
- ) `thenRn` \ (new_uprags, prag_fvs) ->
-
- (case maybe_dfun_rdr_name of
- Nothing -> returnRn (Nothing, emptyFVs)
-
- Just dfun_rdr_name -> lookupSysBinder dfun_rdr_name `thenRn` \ dfun_name ->
- returnRn (Just dfun_name, unitFV dfun_name)
- ) `thenRn` \ (maybe_dfun_name, dfun_fv) ->
+ renameSigsFVs (okInstDclSig binder_set) uprags
+ ) `thenRn` \ (uprags', prag_fvs) ->
- -- The typechecker checks that all the bindings are for the right class.
- returnRn (InstD (InstDecl inst_ty' mbinds' new_uprags maybe_dfun_name src_loc),
- inst_fvs `plusFV` meth_fvs `plusFV` prag_fvs `plusFV` dfun_fv)
- where
- meth_doc = text "the bindings in an instance declaration"
- meth_names = bagToList (collectMonoBinders mbinds)
-\end{code}
-
-%*********************************************************
-%* *
-\subsection{Default declarations}
-%* *
-%*********************************************************
-
-\begin{code}
-rnDecl (DefD (DefaultDecl tys src_loc))
- = pushSrcLocRn src_loc $
- rnHsTypes doc_str tys `thenRn` \ (tys', fvs) ->
- returnRn (DefD (DefaultDecl tys' src_loc), fvs)
- where
- doc_str = text "a `default' declaration"
-\end{code}
-
-%*********************************************************
-%* *
-\subsection{Foreign declarations}
-%* *
-%*********************************************************
-
-\begin{code}
-rnDecl (ForD (ForeignDecl name imp_exp ty ext_nm cconv src_loc))
- = pushSrcLocRn src_loc $
- lookupOccRn name `thenRn` \ name' ->
- let
- extra_fvs FoExport
- | isDyn = lookupOrigNames [makeStablePtr_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 ->
-
- rnHsSigType 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("a foreign declaration")
- isDyn = isDynamicExtName ext_nm
-
- ok_ext_nm Dynamic = True
- ok_ext_nm (ExtName nm (Just mb)) = isCLabelString nm && isCLabelString mb
- ok_ext_nm (ExtName nm Nothing) = isCLabelString nm
+ returnRn (InstDecl inst_ty mbinds' uprags' maybe_dfun_name src_loc,
+ meth_fvs `plusFV` prag_fvs)
\end{code}
%*********************************************************
%*********************************************************
\begin{code}
-rnDecl (RuleD (IfaceRule rule_name vars fn args rhs src_loc))
+rnIfaceRuleDecl (IfaceRule rule_name act vars fn args rhs src_loc)
= pushSrcLocRn src_loc $
lookupOccRn fn `thenRn` \ fn' ->
rnCoreBndrs vars $ \ vars' ->
- mapFvRn rnCoreExpr args `thenRn` \ (args', fvs1) ->
- rnCoreExpr rhs `thenRn` \ (rhs', fvs2) ->
- returnRn (RuleD (IfaceRule rule_name vars' fn' args' rhs' src_loc),
- (fvs1 `plusFV` fvs2) `addOneFV` fn')
-
-rnDecl (RuleD (IfaceRuleOut fn rule))
- -- This one is used for BuiltInRules
- -- The rule itself is already done, but the thing
- -- to attach it to is not.
+ mapRn rnCoreExpr args `thenRn` \ args' ->
+ rnCoreExpr rhs `thenRn` \ rhs' ->
+ returnRn (IfaceRule rule_name act vars' fn' args' rhs' src_loc)
+
+rnIfaceRuleDecl (IfaceRuleOut fn rule) -- Builtin rules come this way
= lookupOccRn fn `thenRn` \ fn' ->
- returnRn (RuleD (IfaceRuleOut fn' rule), unitFV fn')
+ returnRn (IfaceRuleOut fn' rule)
-rnDecl (RuleD (HsRule rule_name tvs vars lhs rhs src_loc))
- = ASSERT( null tvs )
- pushSrcLocRn src_loc $
+rnHsRuleDecl (HsRule rule_name act vars lhs rhs src_loc)
+ = pushSrcLocRn src_loc $
+ bindPatSigTyVars (collectRuleBndrSigTys vars) $
- bindTyVarsFV2Rn doc (map UserTyVar sig_tvs) $ \ sig_tvs' _ ->
bindLocalsFVRn doc (map get_var vars) $ \ ids ->
mapFvRn rn_var (vars `zip` ids) `thenRn` \ (vars', fv_vars) ->
bad_vars = [var | var <- ids, not (var `elemNameSet` fv_lhs)]
in
mapRn (addErrRn . badRuleVar rule_name) bad_vars `thenRn_`
- returnRn (RuleD (HsRule rule_name sig_tvs' vars' lhs' rhs' src_loc),
+ returnRn (HsRule rule_name act vars' lhs' rhs' src_loc,
fv_vars `plusFV` fv_lhs `plusFV` fv_rhs)
where
- doc = text "the transformation rule" <+> ptext rule_name
- sig_tvs = extractRuleBndrsTyVars vars
+ doc = text "In the transformation rule" <+> ptext rule_name
get_var (RuleBndr v) = v
get_var (RuleBndrSig v _) = v
rn_var (RuleBndr v, id) = returnRn (RuleBndr id, emptyFVs)
- rn_var (RuleBndrSig v t, id) = rnHsType doc t `thenRn` \ (t', fvs) ->
+ rn_var (RuleBndrSig v t, id) = rnHsTypeFVs doc t `thenRn` \ (t', fvs) ->
returnRn (RuleBndrSig id t', fvs)
\end{code}
%*********************************************************
%* *
-\subsection{Support code for type/data declarations}
+\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}
-rnDerivs :: Maybe [RdrName] -> RnMS (Maybe [Name], FreeVars)
+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 {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})
+ = 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 = derivs, tcdLoc = src_loc, tcdSysNames = sys_names})
+ = pushSrcLocRn src_loc $
+ lookupTopBndrRn tycon `thenRn` \ tycon' ->
+ bindTyVarsRn data_doc tyvars $ \ tyvars' ->
+ rnContext data_doc context `thenRn` \ context' ->
+ rn_derivs derivs `thenRn` \ derivs' ->
+ 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' ->
+ returnRn (TyData {tcdND = new_or_data, tcdCtxt = context', tcdName = tycon',
+ tcdTyVars = tyvars', tcdCons = condecls', tcdNCons = nconstrs,
+ tcdDerivs = derivs', tcdLoc = src_loc, tcdSysNames = sys_names'})
+ where
+ data_doc = text "In the data type declaration for" <+> quotes (ppr tycon)
+ con_names = map conDeclName condecls
+
+ rn_derivs Nothing = returnRn Nothing
+ rn_derivs (Just ds) = rnContext data_doc ds `thenRn` \ ds' -> returnRn (Just ds')
+
+rnTyClDecl (TySynonym {tcdName = name, tcdTyVars = tyvars, tcdSynRhs = ty, tcdLoc = src_loc})
+ = pushSrcLocRn src_loc $
+ lookupTopBndrRn name `thenRn` \ name' ->
+ bindTyVarsRn syn_doc tyvars $ \ tyvars' ->
+ rnHsType syn_doc ty `thenRn` \ ty' ->
+ returnRn (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,
+ tcdSysNames = names, tcdLoc = src_loc})
+ -- Used for both source and interface file decls
+ = pushSrcLocRn src_loc $
+
+ lookupTopBndrRn cname `thenRn` \ cname' ->
+
+ -- Deal with the implicit tycon and datacon name
+ -- They aren't in scope (because they aren't visible to the user)
+ -- and what we want to do is simply look them up in the cache;
+ -- we jolly well ought to get a 'hit' there!
+ mapRn lookupSysBinder names `thenRn` \ names' ->
-rnDerivs Nothing -- derivs not specified
- = returnRn (Nothing, emptyFVs)
+ -- Tyvars scope over bindings and context
+ bindTyVarsRn cls_doc tyvars $ \ tyvars' ->
-rnDerivs (Just clss)
- = mapRn do_one clss `thenRn` \ clss' ->
- returnRn (Just clss', mkNameSet clss')
+ -- Check the superclasses
+ rnContext cls_doc context `thenRn` \ context' ->
+
+ -- Check the functional dependencies
+ rnFds cls_doc fds `thenRn` \ fds' ->
+
+ -- 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]
+ in
+ checkDupOrQualNames sig_doc sig_rdr_names_w_locs `thenRn_`
+ mapRn (rnClassOp cname' fds') op_sigs `thenRn` \ sigs' ->
+ let
+ binders = mkNameSet [ nm | (ClassOpSig nm _ _ _) <- sigs' ]
+ in
+ renameSigs (okClsDclSig binders) non_op_sigs `thenRn` \ non_ops' ->
+
+ -- 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.
+
+ returnRn (ClassDecl { tcdCtxt = context', tcdName = cname', tcdTyVars = tyvars',
+ tcdFDs = fds', tcdSigs = non_ops' ++ sigs', tcdMeths = Nothing,
+ tcdSysNames = names', tcdLoc = src_loc})
where
- do_one cls = lookupOccRn cls `thenRn` \ clas_name ->
- checkRn (getUnique clas_name `elem` derivableClassKeys)
- (derivingNonStdClassErr clas_name) `thenRn_`
- returnRn clas_name
+ 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)
+ = pushSrcLocRn locn $
+ lookupTopBndrRn op `thenRn` \ op_name ->
+
+ -- Check the signature
+ rnHsSigType (quotes (ppr op)) ty `thenRn` \ new_ty ->
+
+ -- Make the default-method 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 (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 -> returnRn GenDefMeth
+ NoDefMeth -> returnRn NoDefMeth
+ ) `thenRn` \ dm_stuff' ->
+
+ 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
+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
+ pushSrcLocRn src_loc $
+ extendTyVarEnvFVRn (map hsTyVarName tyvars) $
+ getLocalNameEnv `thenRn` \ 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 `thenRn_`
+ newLocalsRn gen_rdr_tyvars_w_locs `thenRn` \ gen_tyvars ->
+ rnMethodBinds cls gen_tyvars mbinds `thenRn` \ (mbinds', meth_fvs) ->
+ returnRn (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 = returnRn (tycl_decl, emptyFVs)
+ -- Not a class declaration
\end{code}
+
+%*********************************************************
+%* *
+\subsection{Support code for type/data declarations}
+%* *
+%*********************************************************
+
\begin{code}
conDeclName :: RdrNameConDecl -> (RdrName, SrcLoc)
conDeclName (ConDecl n _ _ _ _ l) = (n,l)
-rnConDecl :: RdrNameConDecl -> RnMS (RenamedConDecl, FreeVars)
+rnConDecl :: RdrNameConDecl -> RnMS RenamedConDecl
rnConDecl (ConDecl name wkr tvs cxt details locn)
= pushSrcLocRn locn $
checkConName name `thenRn_`
lookupSysBinder wkr `thenRn` \ new_wkr ->
-- See comments with ClassDecl
- bindTyVarsFVRn doc tvs $ \ new_tyvars ->
- rnContext doc cxt `thenRn` \ (new_context, cxt_fvs) ->
- rnConDetails doc locn details `thenRn` \ (new_details, det_fvs) ->
- returnRn (ConDecl new_name new_wkr new_tyvars new_context new_details locn,
- cxt_fvs `plusFV` det_fvs)
+ bindTyVarsRn doc tvs $ \ new_tyvars ->
+ rnContext doc cxt `thenRn` \ new_context ->
+ 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)
- = mapFvRn (rnBangTy doc) tys `thenRn` \ (new_tys, fvs) ->
- returnRn (VanillaCon new_tys, fvs)
+ = mapRn (rnBangTy doc) tys `thenRn` \ new_tys ->
+ returnRn (VanillaCon new_tys)
rnConDetails doc locn (InfixCon ty1 ty2)
- = rnBangTy doc ty1 `thenRn` \ (new_ty1, fvs1) ->
- rnBangTy doc ty2 `thenRn` \ (new_ty2, fvs2) ->
- returnRn (InfixCon new_ty1 new_ty2, fvs1 `plusFV` fvs2)
+ = rnBangTy doc ty1 `thenRn` \ new_ty1 ->
+ rnBangTy doc ty2 `thenRn` \ new_ty2 ->
+ returnRn (InfixCon new_ty1 new_ty2)
rnConDetails doc locn (RecCon fields)
= checkDupOrQualNames doc field_names `thenRn_`
- mapFvRn (rnField doc) fields `thenRn` \ (new_fields, fvs) ->
- returnRn (RecCon new_fields, fvs)
+ mapRn (rnField doc) fields `thenRn` \ new_fields ->
+ returnRn (RecCon new_fields)
where
field_names = [(fld, locn) | (flds, _) <- fields, fld <- flds]
rnField doc (names, ty)
= mapRn lookupTopBndrRn names `thenRn` \ new_names ->
- rnBangTy doc ty `thenRn` \ (new_ty, fvs) ->
- returnRn ((new_names, new_ty), fvs)
-
-rnBangTy doc (Banged ty)
- = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
- returnRn (Banged new_ty, fvs)
-
-rnBangTy doc (Unbanged ty)
- = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
- returnRn (Unbanged new_ty, fvs)
+ rnBangTy doc ty `thenRn` \ new_ty ->
+ returnRn (new_names, new_ty)
-rnBangTy doc (Unpacked ty)
- = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
- returnRn (Unpacked new_ty, fvs)
+rnBangTy doc (BangType s ty)
+ = rnHsType doc ty `thenRn` \ new_ty ->
+ returnRn (BangType s new_ty)
-- This data decl will parse OK
-- data T = a Int
%*********************************************************
\begin{code}
-rnHsSigType :: SDoc -> RdrNameHsType -> RnMS (RenamedHsType, FreeVars)
- -- 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 :: SDoc -> RdrNameHsType -> RnMS (RenamedHsType, FreeVars)
-
-rnHsType doc (HsForAllTy Nothing ctxt ty)
- -- Implicit quantifiction in source code (no kinds on tyvars)
- -- Given the signature C => T we universally quantify
- -- over FV(T) \ {in-scope-tyvars}
- = getLocalNameEnv `thenRn` \ name_env ->
- let
- mentioned_in_tau = extractHsTyRdrTyVars ty
- mentioned_in_ctxt = extractHsCtxtRdrTyVars ctxt
- mentioned = nub (mentioned_in_tau ++ mentioned_in_ctxt)
- forall_tyvars = filter (not . (`elemFM` name_env)) mentioned
- in
- rnForAll doc (map UserTyVar forall_tyvars) ctxt ty
-
-rnHsType doc (HsForAllTy (Just forall_tyvars) ctxt tau)
- -- Explicit quantification.
- -- Check that the forall'd tyvars are actually
- -- mentioned in the type, and produce a warning if not
- = let
- mentioned_in_tau = extractHsTyRdrTyVars tau
- mentioned_in_ctxt = extractHsCtxtRdrTyVars ctxt
- mentioned = nub (mentioned_in_tau ++ mentioned_in_ctxt)
- forall_tyvar_names = hsTyVarNames forall_tyvars
-
- -- Explicitly quantified but not mentioned in ctxt or tau
- warn_guys = filter (`notElem` mentioned) forall_tyvar_names
- in
- mapRn_ (forAllWarn doc tau) warn_guys `thenRn_`
- rnForAll doc forall_tyvars ctxt tau
-
-rnHsType doc (HsTyVar tyvar)
- = lookupOccRn tyvar `thenRn` \ tyvar' ->
- returnRn (HsTyVar tyvar', unitFV tyvar')
-
-rnHsType doc (HsFunTy ty1 ty2)
- = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
- -- Might find a for-all as the arg of a function type
- rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
- -- Or as the result. This happens when reading Prelude.hi
- -- when we find return :: forall m. Monad m -> forall a. a -> m a
- returnRn (HsFunTy ty1' ty2', fvs1 `plusFV` fvs2)
-
-rnHsType doc (HsListTy ty)
- = rnHsType doc ty `thenRn` \ (ty', fvs) ->
- returnRn (HsListTy ty', fvs `addOneFV` listTyCon_name)
-
--- 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)
- -- Don't do lookupOccRn, because this is built-in syntax
- -- so it doesn't need to be in scope
- = mapFvRn (rnHsType doc) tys `thenRn` \ (tys', fvs) ->
- returnRn (HsTupleTy (HsTupCon n' boxity) tys', fvs `addOneFV` n')
- where
- n' = tupleTyCon_name boxity (length tys)
-
-
-rnHsType doc (HsAppTy ty1 ty2)
- = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
- rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
- returnRn (HsAppTy ty1' ty2', fvs1 `plusFV` fvs2)
-
-rnHsType doc (HsPredTy pred)
- = rnPred doc pred `thenRn` \ (pred', fvs) ->
- returnRn (HsPredTy pred', fvs)
-
-rnHsType doc (HsUsgForAllTy uv_rdr ty)
- = bindUVarRn doc uv_rdr $ \ uv_name ->
- rnHsType doc ty `thenRn` \ (ty', fvs) ->
- returnRn (HsUsgForAllTy uv_name ty',
- fvs )
-
-rnHsType doc (HsUsgTy usg ty)
- = newUsg usg `thenRn` \ (usg', usg_fvs) ->
- rnHsType doc ty `thenRn` \ (ty', ty_fvs) ->
- -- A for-all can occur inside a usage annotation
- returnRn (HsUsgTy usg' ty',
- usg_fvs `plusFV` ty_fvs)
- where
- newUsg usg = case usg of
- HsUsOnce -> returnRn (HsUsOnce, emptyFVs)
- HsUsMany -> returnRn (HsUsMany, emptyFVs)
- HsUsVar uv_rdr -> lookupOccRn uv_rdr `thenRn` \ uv_name ->
- returnRn (HsUsVar uv_name, emptyFVs)
-
-rnHsTypes doc tys = mapFvRn (rnHsType doc) tys
-\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, unitFV n')
-
-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, unitFV n')
-\end{code}
-
-\begin{code}
-rnForAll doc forall_tyvars ctxt ty
- = bindTyVarsFVRn doc forall_tyvars $ \ new_tyvars ->
- rnContext doc ctxt `thenRn` \ (new_ctxt, cxt_fvs) ->
- rnHsType doc ty `thenRn` \ (new_ty, ty_fvs) ->
- returnRn (mkHsForAllTy (Just new_tyvars) new_ctxt new_ty,
- cxt_fvs `plusFV` ty_fvs)
-\end{code}
-
-\begin{code}
-rnContext :: SDoc -> RdrNameContext -> RnMS (RenamedContext, FreeVars)
-rnContext doc ctxt
- = mapAndUnzipRn rn_pred ctxt `thenRn` \ (theta, fvs_s) ->
- 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_`
- returnRn (theta, plusFVs fvs_s)
- where
- --Someone discovered that @CCallable@ and @CReturnable@
- -- could be used in contexts such as:
- -- foo :: CCallable a => a -> PrimIO Int
- -- Doing this utterly wrecks the whole point of introducing these
- -- classes so we specifically check that this isn't being done.
- rn_pred pred = rnPred doc pred `thenRn` \ (pred', fvs)->
- checkRn (not (bad_pred pred'))
- (naughtyCCallContextErr pred') `thenRn_`
- returnRn (pred', fvs)
-
- bad_pred (HsPClass clas _) = getUnique clas `elem` cCallishClassKeys
- bad_pred other = False
-
-
-rnPred doc (HsPClass clas tys)
- = lookupOccRn clas `thenRn` \ clas_name ->
- rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
- returnRn (HsPClass clas_name tys', fvs `addOneFV` clas_name)
-
-rnPred doc (HsPIParam n ty)
- = newIPName n `thenRn` \ name ->
- rnHsType doc ty `thenRn` \ (ty', fvs) ->
- returnRn (HsPIParam name ty', fvs)
-\end{code}
-
-\begin{code}
-rnFds :: SDoc -> [FunDep RdrName] -> RnMS ([FunDep Name], FreeVars)
+rnFds :: SDoc -> [FunDep RdrName] -> RnMS [FunDep Name]
rnFds doc fds
- = mapAndUnzipRn rn_fds fds `thenRn` \ (theta, fvs_s) ->
- returnRn (theta, plusFVs fvs_s)
+ = mapRn rn_fds fds
where
rn_fds (tys1, tys2)
- = rnHsTyVars doc tys1 `thenRn` \ (tys1', fvs1) ->
- rnHsTyVars doc tys2 `thenRn` \ (tys2', fvs2) ->
- returnRn ((tys1', tys2'), fvs1 `plusFV` fvs2)
-
-rnHsTyVars doc tvs = mapFvRn (rnHsTyvar doc) tvs
-rnHsTyvar doc tyvar
- = lookupOccRn tyvar `thenRn` \ tyvar' ->
- returnRn (tyvar', unitFV tyvar')
+ = rnHsTyVars doc tys1 `thenRn` \ tys1' ->
+ rnHsTyVars doc tys2 `thenRn` \ tys2' ->
+ returnRn (tys1', tys2')
+
+rnHsTyVars doc tvs = mapRn (rnHsTyvar doc) tvs
+rnHsTyvar doc tyvar = lookupOccRn tyvar
\end{code}
%*********************************************************
%*********************************************************
\begin{code}
-rnIdInfo (HsStrictness str) = returnRn (HsStrictness str, emptyFVs)
-
-rnIdInfo (HsWorker worker)
+rnIdInfo (HsWorker worker arity)
= lookupOccRn worker `thenRn` \ worker' ->
- returnRn (HsWorker worker', unitFV worker')
-
-rnIdInfo (HsUnfold inline expr) = rnCoreExpr expr `thenRn` \ (expr', fvs) ->
- returnRn (HsUnfold inline expr', fvs)
-rnIdInfo (HsArity arity) = returnRn (HsArity arity, emptyFVs)
-rnIdInfo HsNoCafRefs = returnRn (HsNoCafRefs, emptyFVs)
-rnIdInfo HsCprInfo = returnRn (HsCprInfo, emptyFVs)
+ 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
\end{code}
@UfCore@ expressions.
\begin{code}
rnCoreExpr (UfType ty)
- = rnHsType (text "unfolding type") ty `thenRn` \ (ty', fvs) ->
- returnRn (UfType ty', fvs)
+ = rnHsType (text "unfolding type") ty `thenRn` \ ty' ->
+ returnRn (UfType ty')
rnCoreExpr (UfVar v)
= lookupOccRn v `thenRn` \ v' ->
- returnRn (UfVar v', unitFV v')
+ returnRn (UfVar v')
rnCoreExpr (UfLit l)
- = returnRn (UfLit l, emptyFVs)
+ = returnRn (UfLit l)
rnCoreExpr (UfLitLit l ty)
- = rnHsType (text "litlit") ty `thenRn` \ (ty', fvs) ->
- returnRn (UfLitLit l ty', fvs)
+ = rnHsType (text "litlit") ty `thenRn` \ ty' ->
+ returnRn (UfLitLit l ty')
-rnCoreExpr (UfCCall cc ty)
- = rnHsType (text "ccall") ty `thenRn` \ (ty', fvs) ->
- returnRn (UfCCall cc ty', fvs)
+rnCoreExpr (UfFCall cc ty)
+ = rnHsType (text "ccall") ty `thenRn` \ ty' ->
+ returnRn (UfFCall cc ty')
-rnCoreExpr (UfTuple con args)
- = rnHsTupConWkr con `thenRn` \ (con', fvs1) ->
- mapFvRn rnCoreExpr args `thenRn` \ (args', fvs2) ->
- returnRn (UfTuple con' args', fvs1 `plusFV` fvs2)
+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', fv1) ->
- rnCoreExpr arg `thenRn` \ (arg', fv2) ->
- returnRn (UfApp fun' arg', fv1 `plusFV` fv2)
+ = rnCoreExpr fun `thenRn` \ fun' ->
+ rnCoreExpr arg `thenRn` \ arg' ->
+ returnRn (UfApp fun' arg')
rnCoreExpr (UfCase scrut bndr alts)
- = rnCoreExpr scrut `thenRn` \ (scrut', fvs1) ->
- bindCoreLocalFVRn bndr ( \ bndr' ->
- mapFvRn rnCoreAlt alts `thenRn` \ (alts', fvs2) ->
- returnRn (UfCase scrut' bndr' alts', fvs2)
- ) `thenRn` \ (case', fvs3) ->
- returnRn (case', fvs1 `plusFV` fvs3)
+ = rnCoreExpr scrut `thenRn` \ scrut' ->
+ bindCoreLocalRn bndr $ \ bndr' ->
+ mapRn rnCoreAlt alts `thenRn` \ alts' ->
+ returnRn (UfCase scrut' bndr' alts')
rnCoreExpr (UfNote note expr)
- = rnNote note `thenRn` \ (note', fvs1) ->
- rnCoreExpr expr `thenRn` \ (expr', fvs2) ->
- returnRn (UfNote note' expr', fvs1 `plusFV` fvs2)
+ = rnNote note `thenRn` \ note' ->
+ rnCoreExpr expr `thenRn` \ expr' ->
+ returnRn (UfNote note' expr')
rnCoreExpr (UfLam bndr body)
= rnCoreBndr bndr $ \ bndr' ->
- rnCoreExpr body `thenRn` \ (body', fvs) ->
- returnRn (UfLam bndr' body', fvs)
+ rnCoreExpr body `thenRn` \ body' ->
+ returnRn (UfLam bndr' body')
rnCoreExpr (UfLet (UfNonRec bndr rhs) body)
- = rnCoreExpr rhs `thenRn` \ (rhs', fvs1) ->
- rnCoreBndr bndr ( \ bndr' ->
- rnCoreExpr body `thenRn` \ (body', fvs2) ->
- returnRn (UfLet (UfNonRec bndr' rhs') body', fvs2)
- ) `thenRn` \ (result, fvs3) ->
- returnRn (result, fvs1 `plusFV` fvs3)
+ = rnCoreExpr rhs `thenRn` \ rhs' ->
+ rnCoreBndr bndr $ \ bndr' ->
+ rnCoreExpr body `thenRn` \ body' ->
+ returnRn (UfLet (UfNonRec bndr' rhs') body')
rnCoreExpr (UfLet (UfRec pairs) body)
= rnCoreBndrs bndrs $ \ bndrs' ->
- mapFvRn rnCoreExpr rhss `thenRn` \ (rhss', fvs1) ->
- rnCoreExpr body `thenRn` \ (body', fvs2) ->
- returnRn (UfLet (UfRec (bndrs' `zip` rhss')) body', fvs1 `plusFV` fvs2)
+ mapRn rnCoreExpr rhss `thenRn` \ rhss' ->
+ rnCoreExpr body `thenRn` \ body' ->
+ returnRn (UfLet (UfRec (bndrs' `zip` rhss')) body')
where
(bndrs, rhss) = unzip pairs
\end{code}
\begin{code}
rnCoreBndr (UfValBinder name ty) thing_inside
- = rnHsType doc ty `thenRn` \ (ty', fvs1) ->
- bindCoreLocalFVRn name ( \ name' ->
- thing_inside (UfValBinder name' ty')
- ) `thenRn` \ (result, fvs2) ->
- returnRn (result, fvs1 `plusFV` fvs2)
+ = rnHsType doc ty `thenRn` \ ty' ->
+ bindCoreLocalRn name $ \ name' ->
+ thing_inside (UfValBinder name' ty')
where
doc = text "unfolding id"
rnCoreBndr (UfTyBinder name kind) thing_inside
- = bindCoreLocalFVRn name $ \ name' ->
+ = bindCoreLocalRn name $ \ name' ->
thing_inside (UfTyBinder name' kind)
rnCoreBndrs [] thing_inside = thing_inside []
\begin{code}
rnCoreAlt (con, bndrs, rhs)
- = rnUfCon con bndrs `thenRn` \ (con', fvs1) ->
- bindCoreLocalsFVRn bndrs ( \ bndrs' ->
- rnCoreExpr rhs `thenRn` \ (rhs', fvs2) ->
- returnRn ((con', bndrs', rhs'), fvs2)
- ) `thenRn` \ (result, fvs3) ->
- returnRn (result, fvs1 `plusFV` fvs3)
+ = rnUfCon con `thenRn` \ con' ->
+ bindCoreLocalsRn bndrs $ \ bndrs' ->
+ rnCoreExpr rhs `thenRn` \ rhs' ->
+ returnRn (con', bndrs', rhs')
rnNote (UfCoerce ty)
- = rnHsType (text "unfolding coerce") ty `thenRn` \ (ty', fvs) ->
- returnRn (UfCoerce ty', fvs)
+ = rnHsType (text "unfolding coerce") ty `thenRn` \ ty' ->
+ returnRn (UfCoerce ty')
-rnNote (UfSCC cc) = returnRn (UfSCC cc, emptyFVs)
-rnNote UfInlineCall = returnRn (UfInlineCall, emptyFVs)
-rnNote UfInlineMe = returnRn (UfInlineMe, emptyFVs)
+rnNote (UfSCC cc) = returnRn (UfSCC cc)
+rnNote UfInlineCall = returnRn UfInlineCall
+rnNote UfInlineMe = returnRn UfInlineMe
-rnUfCon UfDefault _
- = returnRn (UfDefault, emptyFVs)
+rnUfCon UfDefault
+ = returnRn UfDefault
-rnUfCon (UfTupleAlt tup_con) bndrs
- = rnHsTupCon tup_con `thenRn` \ (HsTupCon con' _, fvs) ->
- returnRn (UfDataAlt con', fvs)
- -- 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', unitFV con')
+ returnRn (UfDataAlt con')
-rnUfCon (UfLitAlt lit) _
- = returnRn (UfLitAlt lit, emptyFVs)
+rnUfCon (UfLitAlt lit)
+ = returnRn (UfLitAlt lit)
-rnUfCon (UfLitLitAlt lit ty) _
- = rnHsType (text "litlit") ty `thenRn` \ (ty', fvs) ->
- returnRn (UfLitLitAlt lit ty', fvs)
+rnUfCon (UfLitLitAlt lit ty)
+ = rnHsType (text "litlit") ty `thenRn` \ ty' ->
+ returnRn (UfLitLitAlt lit ty')
\end{code}
%*********************************************************
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
%*********************************************************
\begin{code}
-derivingNonStdClassErr clas
- = hsep [ptext SLIT("non-standard class"), ppr clas, ptext SLIT("in deriving clause")]
-
-classTyVarNotInOpTyErr clas_tyvar sig
- = hang (hsep [ptext SLIT("Class type variable"),
- quotes (ppr clas_tyvar),
- ptext SLIT("does not appear in method signature")])
- 4 (ppr sig)
-
badDataCon name
= hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
-forAllWarn doc ty tyvar
- | not opt_WarnUnusedMatches = returnRn ()
- | otherwise
- = 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
- -- informative. They can arise from mkRhsTyLam,
-#endif -- leading to (say) f :: forall a b. [b] -> [b]
- other ->
-
- addWarnRn (
- 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))
- }
-
badRuleLhsErr name lhs
= sep [ptext SLIT("Rule") <+> ptext name <> colon,
nest 4 (ptext SLIT("Illegal 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") <+> 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 _)
- = 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