\section[RnSource]{Main pass of renamer}
\begin{code}
-module RnSource ( rnIfaceDecl, rnSourceDecls, rnHsType, rnHsSigType ) where
+module RnSource ( rnTyClDecl, rnIfaceRuleDecl, rnInstDecl, rnSourceDecls,
+ ) where
#include "HsVersions.h"
import RnExpr
import HsSyn
-import HsDecls ( HsIdInfo(..), HsStrictnessInfo(..) )
-import HsPragmas
-import HsTypes ( getTyVarName, pprClassAssertion, cmpHsTypes )
-import RdrHsSyn
+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 ( bindTyVarsRn, lookupBndrRn, lookupOccRn,
- lookupImplicitOccRn, addImplicitOccRn,
- bindLocalsRn,
- bindTyVarsFVRn, bindTyVarsFV2Rn, extendTyVarEnvRn,
- checkDupOrQualNames, checkDupNames,
- newLocallyDefinedGlobalName, newImportedGlobalName,
- newImportedGlobalFromRdrName,
- ifaceFlavour, newDFunName,
- FreeVars, emptyFVs, plusFV, plusFVs, unitFV, addOneFV
+import RnTypes ( rnHsType, rnHsSigType, rnHsTypeFVs, rnContext )
+
+import RnBinds ( rnTopBinds, rnMethodBinds, renameSigs, renameSigsFVs )
+import RnEnv ( lookupTopBndrRn, lookupOccRn, lookupIfaceName,
+ lookupSysBinder, newLocalsRn,
+ bindLocalsFVRn, bindPatSigTyVars,
+ bindTyVarsRn, extendTyVarEnvFVRn,
+ bindCoreLocalRn, bindCoreLocalsRn, bindLocalNames,
+ checkDupOrQualNames, checkDupNames, mapFvRn
)
import RnMonad
-import Name ( Name, OccName,
- ExportFlag(..), Provenance(..),
- nameOccName, NamedThing(..), isConOcc,
- mkDefaultMethodOcc, mkDFunOcc
- )
+import Class ( FunDep, DefMeth (..) )
+import TyCon ( DataConDetails(..), visibleDataCons )
+import DataCon ( dataConId )
+import Name ( Name, NamedThing(..) )
import NameSet
-import BasicTypes ( TopLevelFlag(..), IfaceFlavour(..) )
-import TysWiredIn ( tupleTyCon, unboxedTupleTyCon, listTyCon )
-import Type ( funTyCon )
-import FiniteMap ( elemFM )
-import PrelInfo ( derivingOccurrences, numClass_RDR,
- deRefStablePtr_NAME, makeStablePtr_NAME,
- bindIO_NAME
+import PrelNames ( deRefStablePtrName, newStablePtrName,
+ bindIOName, returnIOName
)
-import Bag ( bagToList )
+import TysWiredIn ( tupleCon )
+import List ( partition )
import Outputable
import SrcLoc ( SrcLoc )
-import UniqFM ( lookupUFM )
+import CmdLineOpts ( DynFlag(..) )
+ -- Warn of unused for-all'd tyvars
import Maybes ( maybeToBool )
-import Util
+import Maybe ( maybe )
\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}
\item
Checks that tyvars are used properly. This includes checking
for undefined tyvars, and tyvars in contexts that are ambiguous.
+(Some of this checking has now been moved to module @TcMonoType@,
+since we don't have functional dependency information at this point.)
\item
Checks that all variable occurences are defined.
\item
-Checks the (..) etc constraints in the export list.
+Checks the @(..)@ etc constraints in the export list.
\end{enumerate}
%*********************************************************
%* *
-\subsection{Value declarations}
+\subsection{Source code declarations}
%* *
%*********************************************************
\begin{code}
-rnSourceDecls :: [RdrNameHsDecl] -> RnMS s ([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) = rnSourceDecl d `thenRn` \(d', fvs') ->
+ go (fvs `plusFV` fvs') (d':ds') ds
+
+
+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 ->
+ 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')
+
+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
- -- Fixity decls 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' (d:ds) = rnDecl d `thenRn` \(d', fvs) ->
- go (fvs `plusFV` fvs) (d':ds') ds
-
-rnIfaceDecl :: RdrNameHsDecl -> RnMS s RenamedHsDecl
-rnIfaceDecl d
- = rnDecl d `thenRn` \ (d', fvs) ->
- returnRn d'
+ doc_str = text "In a `default' declaration"
\end{code}
%*********************************************************
%* *
-\subsection{Value declarations}
+\subsection{Foreign declarations}
%* *
%*********************************************************
\begin{code}
--- rnDecl does all the work
-rnDecl :: RdrNameHsDecl -> RnMS s (RenamedHsDecl, FreeVars)
+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
+ 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}
-rnDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) ->
- returnRn (ValD new_binds, fvs)
+%*********************************************************
+%* *
+\subsection{Instance declarations}
+%* *
+%*********************************************************
-rnDecl (SigD (IfaceSig name ty id_infos loc))
- = pushSrcLocRn loc $
- lookupBndrRn name `thenRn` \ name' ->
- rnIfaceType doc_str ty `thenRn` \ ty' ->
-
- -- Get the pragma info (if any).
- setModeRn (InterfaceMode Optional) $
- -- In all the rest of the signature we read in optional mode,
- -- so that (a) we don't die
- mapRn rnIdInfo id_infos `thenRn` \ id_infos' ->
- returnRn (SigD (IfaceSig name' ty' id_infos' loc), emptyFVs)
- -- Don't need free-var info for iface binds
+\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' ->
+
+ (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
+ 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 (map hsTyVarName inst_tyvars) (
+ rnMethodBinds cls [] mbinds
+ ) `thenRn` \ (mbinds', meth_fvs) ->
+ let
+ binders = collectMonoBinders mbinds'
+ binder_set = mkNameSet binders
+ in
+ -- Rename the prags and signatures.
+ -- Note that the type variables are not in scope here,
+ -- so that instance Eq a => Eq (T a) where
+ -- {-# SPECIALISE instance Eq a => Eq (T [a]) #-}
+ -- works OK.
+ --
+ -- But the (unqualified) method names are in scope
+ bindLocalNames binders (
+ renameSigsFVs (okInstDclSig binder_set) uprags
+ ) `thenRn` \ (uprags', prag_fvs) ->
+
+ returnRn (InstDecl inst_ty mbinds' uprags' maybe_dfun_name src_loc,
+ meth_fvs `plusFV` prag_fvs)
+\end{code}
+
+%*********************************************************
+%* *
+\subsection{Rules}
+%* *
+%*********************************************************
+
+\begin{code}
+rnIfaceRuleDecl (IfaceRule rule_name act vars fn args rhs src_loc)
+ = pushSrcLocRn src_loc $
+ lookupOccRn fn `thenRn` \ fn' ->
+ rnCoreBndrs vars $ \ vars' ->
+ 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 (IfaceRuleOut fn' rule)
+
+rnHsRuleDecl (HsRule rule_name act vars lhs rhs src_loc)
+ = pushSrcLocRn src_loc $
+ bindPatSigTyVars (collectRuleBndrSigTys vars) $
+
+ bindLocalsFVRn doc (map get_var vars) $ \ ids ->
+ mapFvRn rn_var (vars `zip` ids) `thenRn` \ (vars', fv_vars) ->
+
+ rnExpr lhs `thenRn` \ (lhs', fv_lhs) ->
+ rnExpr rhs `thenRn` \ (rhs', fv_rhs) ->
+ checkRn (validRuleLhs ids lhs')
+ (badRuleLhsErr rule_name lhs') `thenRn_`
+ let
+ bad_vars = [var | var <- ids, not (var `elemNameSet` fv_lhs)]
+ in
+ mapRn (addErrRn . badRuleVar rule_name) bad_vars `thenRn_`
+ returnRn (HsRule rule_name act vars' lhs' rhs' src_loc,
+ fv_vars `plusFV` fv_lhs `plusFV` fv_rhs)
where
- doc_str = text "the interface signature for" <+> quotes (ppr name)
+ 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) = rnHsTypeFVs doc t `thenRn` \ (t', fvs) ->
+ returnRn (RuleBndrSig id t', fvs)
\end{code}
+
%*********************************************************
%* *
-\subsection{Type declarations}
+\subsection{Type, class and iface sig declarations}
%* *
%*********************************************************
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.
+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 derivings pragmas src_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 {tcdName = name', tcdType = ty', tcdIdInfo = id_infos', tcdLoc = loc})
+ where
+ doc_str = text "In the interface signature for" <+> quotes (ppr name)
+
+rnTyClDecl (CoreDecl {tcdName = name, tcdType = ty, tcdRhs = rhs, tcdLoc = loc})
+ = pushSrcLocRn loc $
+ lookupTopBndrRn name `thenRn` \ name' ->
+ rnHsType doc_str ty `thenRn` \ ty' ->
+ rnCoreExpr rhs `thenRn` \ rhs' ->
+ returnRn (CoreDecl {tcdName = name', tcdType = ty', tcdRhs = rhs', tcdLoc = loc})
+ where
+ doc_str = text "In the Core declaration 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,
+ tcdDerivs = derivs, tcdLoc = src_loc, tcdSysNames = sys_names})
= pushSrcLocRn src_loc $
- lookupBndrRn tycon `thenRn` \ tycon' ->
- bindTyVarsFVRn data_doc tyvars $ \ tyvars' ->
- rnContext data_doc context `thenRn` \ (context', cxt_fvs) ->
- checkDupOrQualNames data_doc con_names `thenRn_`
- mapAndUnzipRn rnConDecl condecls `thenRn` \ (condecls', con_fvs_s) ->
- rnDerivs derivings `thenRn` \ (derivings', deriv_fvs) ->
- ASSERT(isNoDataPragmas pragmas)
- returnRn (TyClD (TyData new_or_data context' tycon' tyvars' condecls' derivings' noDataPragmas src_loc),
- cxt_fvs `plusFV` plusFVs con_fvs_s `plusFV` deriv_fvs)
+ 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_`
+
+ rnConDecls tycon' condecls `thenRn` \ condecls' ->
+ mapRn lookupSysBinder sys_names `thenRn` \ sys_names' ->
+ returnRn (TyData {tcdND = new_or_data, tcdCtxt = context', tcdName = tycon',
+ tcdTyVars = tyvars', tcdCons = condecls',
+ tcdDerivs = derivs', tcdLoc = src_loc, tcdSysNames = sys_names'})
where
- data_doc = text "the data type declaration for" <+> ppr tycon
- con_names = map conDeclName condecls
+ data_doc = text "In the data type declaration for" <+> quotes (ppr tycon)
+ con_names = map conDeclName (visibleDataCons condecls)
-rnDecl (TyClD (TySynonym name tyvars ty src_loc))
+ 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 $
- lookupBndrRn name `thenRn` \ name' ->
- bindTyVarsFVRn syn_doc tyvars $ \ tyvars' ->
- rnHsType syn_doc ty `thenRn` \ (ty', ty_fvs) ->
- returnRn (TyClD (TySynonym name' tyvars' ty' src_loc), ty_fvs)
+ 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 "the declaration for type synonym" <+> quotes (ppr name)
+ syn_doc = text "In the declaration for type synonym" <+> quotes (ppr name)
-rnDecl (TyClD (ClassDecl context cname tyvars sigs mbinds pragmas tname dname 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 $
- lookupBndrRn cname `thenRn` \ cname' ->
+ 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
- newImportedGlobalFromRdrName tname `thenRn` \ tname' ->
- newImportedGlobalFromRdrName dname `thenRn` \ dname' ->
+ mapRn lookupSysBinder names `thenRn` \ names' ->
-- Tyvars scope over bindings and context
- bindTyVarsFV2Rn cls_doc tyvars ( \ clas_tyvar_names tyvars' ->
+ bindTyVarsRn cls_doc tyvars $ \ tyvars' ->
-- Check the superclasses
- rnContext cls_doc context `thenRn` \ (context', cxt_fvs) ->
+ 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
- -- Filter out fixity signatures;
- -- they are done at top level
- nofix_sigs = nonFixitySigs sigs
+ (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_`
- mapAndUnzipRn (rn_op cname' clas_tyvar_names) nofix_sigs `thenRn` \ (sigs', sig_fvs_s) ->
-
- -- Check the methods
- checkDupOrQualNames meth_doc meth_rdr_names_w_locs `thenRn_`
- rnMethodBinds mbinds `thenRn` \ (mbinds', meth_fvs) ->
+ 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.
- ASSERT(isNoClassPragmas pragmas)
- returnRn (TyClD (ClassDecl context' cname' tyvars' sigs' mbinds' NoClassPragmas tname' dname' src_loc),
- plusFVs sig_fvs_s `plusFV` cxt_fvs `plusFV` meth_fvs)
- )
+ 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
- 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)
- meth_rdr_names = map fst meth_rdr_names_w_locs
-
- rn_op clas clas_tyvars sig@(ClassOpSig op maybe_dm ty locn)
- = pushSrcLocRn locn $
- lookupBndrRn 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` op_ty_fvs)
- (classTyVarNotInOpTyErr clas_tyvar sig)
- in
- mapRn check_in_op_ty clas_tyvars `thenRn_`
-
- -- Make the default-method name
- let
- dm_occ = mkDefaultMethodOcc (rdrNameOcc op)
- in
- getModuleRn `thenRn` \ mod_name ->
- getModeRn `thenRn` \ mode ->
- (case (mode, maybe_dm) of
- (SourceMode, _) | op `elem` meth_rdr_names
- -> -- There's an explicit method decl
- newLocallyDefinedGlobalName mod_name dm_occ
- (\_ -> Exported) locn `thenRn` \ dm_name ->
- returnRn (Just dm_name)
-
- (InterfaceMode _, Just _)
- -> -- Imported class that has a default method decl
- newImportedGlobalName mod_name dm_occ (ifaceFlavour clas) `thenRn` \ dm_name ->
- addOccurrenceName dm_name `thenRn_`
- returnRn (Just dm_name)
-
- other -> returnRn Nothing
- ) `thenRn` \ maybe_dm_name ->
-
-
- returnRn (ClassOpSig op_name maybe_dm_name new_ty locn, op_ty_fvs)
-\end{code}
-
-
-%*********************************************************
-%* *
-\subsection{Instance declarations}
-%* *
-%*********************************************************
+ cls_doc = text "In the declaration for class" <+> ppr cname
+ sig_doc = text "In the signatures for class" <+> ppr cname
-\begin{code}
-rnDecl (InstD (InstDecl inst_ty mbinds uprags maybe_dfun src_loc))
- = pushSrcLocRn src_loc $
- rnHsSigType (text "an instance decl") inst_ty `thenRn` \ (inst_ty', inst_fvs) ->
+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
- inst_tyvars = case inst_ty' of
- HsForAllTy inst_tyvars _ _ -> inst_tyvars
- other -> []
- -- (Slightly strangely) the forall-d tyvars scope over
- -- the method bindings too
+ meth_rdr_names_w_locs = collectLocatedMonoBinders mbinds
+ gen_rdr_tyvars_w_locs = [(tv,src_loc) | tv <- extractGenericPatTyVars mbinds,
+ not (tv `elemRdrEnv` name_env)]
in
- extendTyVarEnvRn inst_tyvars $
-
- -- Rename the bindings
- -- NB meth_names can be qualified!
- checkDupNames meth_doc meth_names `thenRn_`
- rnMethodBinds mbinds `thenRn` \ (mbinds', meth_fvs) ->
- let
- binders = mkNameSet (map fst (bagToList (collectMonoBinders mbinds')))
- in
- renameSigs NotTopLevel True binders uprags `thenRn` \ new_uprags ->
- mkDFunName inst_ty' maybe_dfun src_loc `thenRn` \ dfun_name ->
- addOccurrenceName dfun_name `thenRn_`
- -- The dfun is not optional, because we use its version number
- -- to identify the version of the instance declaration
-
- -- The typechecker checks that all the bindings are for the right class.
- returnRn (InstD (InstDecl inst_ty' mbinds' new_uprags (Just dfun_name) src_loc),
- inst_fvs `plusFV` meth_fvs)
- 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) ->
- lookupImplicitOccRn numClass_RDR `thenRn_`
- returnRn (DefD (DefaultDecl tys' src_loc), fvs)
+ 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
- doc_str = text "a `default' declaration"
+ 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.
+ = returnRn (tycl_decl,
+ maybe emptyFVs extractHsCtxtTyNames derivings)
+
+finishSourceTyClDecl _ tycl_decl = returnRn (tycl_decl, emptyFVs)
+ -- Not a class declaration
\end{code}
-%*********************************************************
-%* *
-\subsection{Foreign declarations}
-%* *
-%*********************************************************
-
-\begin{code}
-rnDecl (ForD (ForeignDecl name imp_exp ty ext_nm cconv src_loc))
- = pushSrcLocRn src_loc $
- lookupBndrRn name `thenRn` \ name' ->
- (case imp_exp of
- FoImport _ | not isDyn -> addImplicitOccRn name'
- FoLabel -> addImplicitOccRn name'
- FoExport | isDyn ->
- addImplicitOccRn makeStablePtr_NAME `thenRn_`
- addImplicitOccRn deRefStablePtr_NAME `thenRn_`
- addImplicitOccRn bindIO_NAME `thenRn_`
- returnRn name'
- _ -> returnRn name') `thenRn_`
- rnHsSigType fo_decl_msg ty `thenRn` \ (ty', fvs) ->
- returnRn (ForD (ForeignDecl name' imp_exp ty' ext_nm cconv src_loc), fvs)
- where
- fo_decl_msg = ptext SLIT("a foreign declaration")
- isDyn = isDynamic ext_nm
-
-\end{code}
%*********************************************************
%* *
%*********************************************************
\begin{code}
-rnDerivs :: Maybe [RdrName] -> RnMS s (Maybe [Name], FreeVars)
-
-rnDerivs Nothing -- derivs not specified
- = returnRn (Nothing, emptyFVs)
-
-rnDerivs (Just ds)
- = mapRn rn_deriv ds `thenRn` \ derivs ->
- returnRn (Just derivs, mkNameSet derivs)
- where
- rn_deriv clas
- = lookupOccRn clas `thenRn` \ clas_name ->
-
- -- Now add extra "occurrences" for things that
- -- the deriving mechanism will later need in order to
- -- generate code for this class.
- case lookupUFM derivingOccurrences clas_name of
- Nothing -> addErrRn (derivingNonStdClassErr clas_name) `thenRn_`
- returnRn clas_name
-
- Just occs -> mapRn lookupImplicitOccRn occs `thenRn_`
- returnRn clas_name
-
-\end{code}
-
-\begin{code}
conDeclName :: RdrNameConDecl -> (RdrName, SrcLoc)
-conDeclName (ConDecl n _ _ _ l) = (n,l)
-
-rnConDecl :: RdrNameConDecl -> RnMS s (RenamedConDecl, FreeVars)
-rnConDecl (ConDecl name tvs cxt details locn)
+conDeclName (ConDecl n _ _ _ _ l) = (n,l)
+
+rnConDecls :: Name -> DataConDetails RdrNameConDecl -> RnMS (DataConDetails RenamedConDecl)
+rnConDecls tycon Unknown = returnRn Unknown
+rnConDecls tycon (HasCons n) = returnRn (HasCons n)
+rnConDecls tycon (DataCons condecls)
+ = -- Check that there's at least one condecl,
+ -- or else we're reading an interface file, or -fglasgow-exts
+ (if null condecls then
+ doptRn Opt_GlasgowExts `thenRn` \ glaExts ->
+ getModeRn `thenRn` \ mode ->
+ checkRn (glaExts || isInterfaceMode mode)
+ (emptyConDeclsErr tycon)
+ else returnRn ()
+ ) `thenRn_`
+
+ mapRn rnConDecl condecls `thenRn` \ condecls' ->
+ returnRn (DataCons condecls')
+
+rnConDecl :: RdrNameConDecl -> RnMS RenamedConDecl
+rnConDecl (ConDecl name wkr tvs cxt details locn)
= pushSrcLocRn locn $
- checkConName name `thenRn_`
- lookupBndrRn name `thenRn` \ new_name ->
- 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_tyvars new_context new_details locn,
- cxt_fvs `plusFV` det_fvs)
+ checkConName name `thenRn_`
+ lookupTopBndrRn name `thenRn` \ new_name ->
+
+ lookupSysBinder wkr `thenRn` \ new_wkr ->
+ -- See comments with ClassDecl
+
+ 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)
- = mapAndUnzipRn (rnBangTy doc) tys `thenRn` \ (new_tys, fvs_s) ->
- returnRn (VanillaCon new_tys, plusFVs fvs_s)
+ = 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)
-
-rnConDetails doc locn (NewCon ty)
- = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
- returnRn (NewCon new_ty, fvs)
+ = 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_`
- mapAndUnzipRn (rnField doc) fields `thenRn` \ (new_fields, fvs_s) ->
- returnRn (RecCon new_fields, plusFVs fvs_s)
+ 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 lookupBndrRn 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)
+ = mapRn lookupTopBndrRn names `thenRn` \ new_names ->
+ rnBangTy doc ty `thenRn` \ new_ty ->
+ returnRn (new_names, new_ty)
-rnBangTy doc (Unbanged ty)
- = rnHsType doc ty `thenRn` \ (new_ty, fvs) ->
- returnRn (Unbanged 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
-- from interface files, which always print in prefix form
checkConName name
- = checkRn (isConOcc (rdrNameOcc name))
+ = checkRn (isRdrDataCon name)
(badDataCon name)
\end{code}
%*********************************************************
%* *
-\subsection{Naming a dfun}
-%* *
-%*********************************************************
-
-Make a name for the dict fun for an instance decl
-
-\begin{code}
-mkDFunName :: RenamedHsType -- Instance type
- -> Maybe RdrName -- Dfun thing from decl; Nothing <=> source
- -> SrcLoc
- -> RnMS s Name
-
-mkDFunName inst_ty maybe_df src_loc
- = newDFunName cl_occ tycon_occ maybe_df src_loc
- where
- (cl_occ, tycon_occ) = get_key inst_ty
-
- get_key (HsForAllTy _ _ ty) = get_key ty
- get_key (MonoFunTy _ ty) = get_key ty
- get_key (MonoDictTy cls (ty:_)) = (nameOccName cls, get_tycon_key ty)
-
- get_tycon_key (MonoTyVar tv) = nameOccName (getName tv)
- get_tycon_key (MonoTyApp ty _) = get_tycon_key ty
- get_tycon_key (MonoTupleTy tys True) = getOccName (tupleTyCon (length tys))
- get_tycon_key (MonoTupleTy tys False) = getOccName (unboxedTupleTyCon (length tys))
- get_tycon_key (MonoListTy _) = getOccName listTyCon
- get_tycon_key (MonoFunTy _ _) = getOccName funTyCon
-\end{code}
-
-
-%*********************************************************
-%* *
\subsection{Support code to rename types}
%* *
%*********************************************************
\begin{code}
-rnHsSigType :: SDoc -> RdrNameHsType -> RnMS s (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
-
-rnIfaceType :: SDoc -> RdrNameHsType -> RnMS s RenamedHsType
-rnIfaceType doc ty
- = rnHsType doc ty `thenRn` \ (ty,_) ->
- returnRn ty
+rnFds :: SDoc -> [FunDep RdrName] -> RnMS [FunDep Name]
-rnHsType :: SDoc -> RdrNameHsType -> RnMS s (RenamedHsType, FreeVars)
-
-rnHsType doc (HsForAllTy [] ctxt ty)
- -- From source code (no kinds on tyvars)
-
- -- Given the signature C => T we universally quantify
- -- over FV(T) \ {in-scope-tyvars}
- --
- -- We insist that the universally quantified type vars is a superset of FV(C)
- -- It follows that FV(T) is a superset of FV(C), so that the context constrains
- -- no type variables that don't appear free in the tau-type part.
-
- = getLocalNameEnv `thenRn` \ name_env ->
- let
- mentioned_tyvars = extractHsTyVars ty
- forall_tyvars = filter (not . (`elemFM` name_env)) mentioned_tyvars
-
- ctxt_w_ftvs :: [((RdrName,[RdrNameHsType]), [RdrName])]
- ctxt_w_ftvs = [ (constraint, foldr ((++) . extractHsTyVars) [] tys)
- | constraint@(_,tys) <- ctxt]
-
- -- A 'non-poly constraint' is one that does not mention *any*
- -- of the forall'd type variables
- non_poly_constraints = filter non_poly ctxt_w_ftvs
- non_poly (c,ftvs) = not (any (`elem` forall_tyvars) ftvs)
-
- -- A 'non-mentioned' constraint is one that mentions a
- -- type variable that does not appear in 'ty'
- non_mentioned_constraints = filter non_mentioned ctxt_w_ftvs
- non_mentioned (c,ftvs) = any (not . (`elem` mentioned_tyvars)) ftvs
-
- -- Zap the context if there's a problem, to avoid duplicate error message.
- ctxt' | null non_poly_constraints && null non_mentioned_constraints = ctxt
- | otherwise = []
- in
- mapRn (ctxtErr1 doc forall_tyvars ty) non_poly_constraints `thenRn_`
- mapRn (ctxtErr2 doc ty) non_mentioned_constraints `thenRn_`
-
- (bindTyVarsFVRn doc (map UserTyVar forall_tyvars) $ \ new_tyvars ->
- rnContext doc ctxt' `thenRn` \ (new_ctxt, cxt_fvs) ->
- rnHsType doc ty `thenRn` \ (new_ty, ty_fvs) ->
- returnRn (mkHsForAllTy new_tyvars new_ctxt new_ty,
- cxt_fvs `plusFV` ty_fvs)
- )
-
-rnHsType doc (HsForAllTy tvs ctxt ty)
- -- tvs are non-empty, hence must be from an interface file
- -- (tyvars may be kinded)
- = bindTyVarsFVRn doc tvs $ \ new_tyvars ->
- rnContext doc ctxt `thenRn` \ (new_ctxt, cxt_fvs) ->
- rnHsType doc ty `thenRn` \ (new_ty, ty_fvs) ->
- returnRn (mkHsForAllTy new_tyvars new_ctxt new_ty,
- cxt_fvs `plusFV` ty_fvs)
-
-rnHsType doc (MonoTyVar tyvar)
- = lookupOccRn tyvar `thenRn` \ tyvar' ->
- returnRn (MonoTyVar tyvar', unitFV tyvar')
-
-rnHsType doc (MonoFunTy ty1 ty2)
- = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
- rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
- returnRn (MonoFunTy ty1' ty2', fvs1 `plusFV` fvs2)
-
-rnHsType doc (MonoListTy ty)
- = addImplicitOccRn listTyCon_name `thenRn_`
- rnHsType doc ty `thenRn` \ (ty', fvs) ->
- returnRn (MonoListTy ty', fvs `addOneFV` listTyCon_name)
-
-rnHsType doc (MonoTupleTy tys boxed)
- = addImplicitOccRn tup_con_name `thenRn_`
- rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
- returnRn (MonoTupleTy tys' boxed, fvs `addOneFV` tup_con_name)
+rnFds doc fds
+ = mapRn rn_fds fds
where
- tup_con_name = tupleTyCon_name boxed (length tys)
+ rn_fds (tys1, tys2)
+ = rnHsTyVars doc tys1 `thenRn` \ tys1' ->
+ rnHsTyVars doc tys2 `thenRn` \ tys2' ->
+ returnRn (tys1', tys2')
-rnHsType doc (MonoTyApp ty1 ty2)
- = rnHsType doc ty1 `thenRn` \ (ty1', fvs1) ->
- rnHsType doc ty2 `thenRn` \ (ty2', fvs2) ->
- returnRn (MonoTyApp ty1' ty2', fvs1 `plusFV` fvs2)
-
-rnHsType doc (MonoDictTy clas tys)
- = lookupOccRn clas `thenRn` \ clas' ->
- rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
- returnRn (MonoDictTy clas' tys', fvs `addOneFV` clas')
-
-rnHsTypes doc tys
- = mapAndUnzipRn (rnHsType doc) tys `thenRn` \ (tys, fvs_s) ->
- returnRn (tys, plusFVs fvs_s)
-\end{code}
-
-
-\begin{code}
-rnContext :: SDoc -> RdrNameContext -> RnMS s (RenamedContext, FreeVars)
-
-rnContext doc ctxt
- = mapAndUnzipRn rn_ctxt ctxt `thenRn` \ (theta, fvs_s) ->
- let
- (_, dup_asserts) = removeDups cmp_assert theta
- in
- -- Check for duplicate assertions
- -- If this isn't an error, then it ought to be:
- mapRn (addWarnRn . dupClassAssertWarn theta) dup_asserts `thenRn_`
-
- returnRn (theta, plusFVs fvs_s)
- where
- rn_ctxt (clas, tys)
- = lookupOccRn clas `thenRn` \ clas_name ->
- rnHsTypes doc tys `thenRn` \ (tys', fvs) ->
- returnRn ((clas_name, tys'), fvs `addOneFV` clas_name)
-
- cmp_assert (c1,tys1) (c2,tys2)
- = (c1 `compare` c2) `thenCmp` (cmpHsTypes compare tys1 tys2)
+rnHsTyVars doc tvs = mapRn (rnHsTyvar doc) tvs
+rnHsTyvar doc tyvar = lookupOccRn tyvar
\end{code}
-
%*********************************************************
-%* *
+%* *
\subsection{IdInfo}
-%* *
+%* *
%*********************************************************
\begin{code}
-rnIdInfo (HsStrictness strict)
- = rnStrict strict `thenRn` \ strict' ->
- returnRn (HsStrictness strict')
-
-rnIdInfo (HsUnfold inline (Just expr)) = rnCoreExpr expr `thenRn` \ expr' ->
- returnRn (HsUnfold inline (Just expr'))
-rnIdInfo (HsUnfold inline Nothing) = returnRn (HsUnfold inline Nothing)
-rnIdInfo (HsArity arity) = returnRn (HsArity arity)
-rnIdInfo (HsUpdate update) = returnRn (HsUpdate update)
-rnIdInfo (HsNoCafRefs) = returnRn (HsNoCafRefs)
-rnIdInfo (HsSpecialise tyvars tys expr)
- = bindTyVarsRn doc tyvars $ \ tyvars' ->
- rnCoreExpr expr `thenRn` \ expr' ->
- mapRn (rnIfaceType doc) tys `thenRn` \ tys' ->
- returnRn (HsSpecialise tyvars' tys' expr')
- where
- doc = text "Specialise in interface pragma"
-
-
-rnStrict (HsStrictnessInfo demands (Just (worker,cons)))
- -- The sole purpose of the "cons" field is so that we can mark the constructors
- -- needed to build the wrapper as "needed", so that their data type decl will be
- -- slurped in. After that their usefulness is o'er, so we just put in the empty list.
+rnIdInfo (HsWorker worker arity)
= lookupOccRn worker `thenRn` \ worker' ->
- mapRn lookupOccRn cons `thenRn_`
- returnRn (HsStrictnessInfo demands (Just (worker',[])))
+ returnRn (HsWorker worker' arity)
--- Boring, but necessary for the type checker.
-rnStrict (HsStrictnessInfo demands Nothing) = returnRn (HsStrictnessInfo demands Nothing)
-rnStrict HsBottom = returnRn HsBottom
+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.
+@UfCore@ expressions.
\begin{code}
rnCoreExpr (UfType ty)
- = rnIfaceType (text "unfolding type") ty `thenRn` \ ty' ->
+ = rnHsType (text "unfolding type") ty `thenRn` \ ty' ->
returnRn (UfType ty')
rnCoreExpr (UfVar v)
= lookupOccRn v `thenRn` \ v' ->
returnRn (UfVar v')
-rnCoreExpr (UfCon con args)
- = rnUfCon con `thenRn` \ con' ->
- mapRn rnCoreExpr args `thenRn` \ args' ->
- returnRn (UfCon con' args')
+rnCoreExpr (UfLit l)
+ = returnRn (UfLit l)
-rnCoreExpr (UfTuple con args)
- = lookupOccRn con `thenRn` \ con' ->
- mapRn rnCoreExpr args `thenRn` \ args' ->
- returnRn (UfTuple con' args')
+rnCoreExpr (UfLitLit l ty)
+ = rnHsType (text "litlit") ty `thenRn` \ ty' ->
+ returnRn (UfLitLit l ty')
+
+rnCoreExpr (UfFCall cc ty)
+ = rnHsType (text "ccall") ty `thenRn` \ ty' ->
+ returnRn (UfFCall cc ty')
+
+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' ->
rnCoreExpr arg `thenRn` \ arg' ->
returnRn (UfApp fun' arg')
-rnCoreExpr (UfCase scrut bndr alts)
+rnCoreExpr (UfCase scrut bndr alts)
= rnCoreExpr scrut `thenRn` \ scrut' ->
- bindLocalsRn "UfCase" [bndr] $ \ [bndr'] ->
+ bindCoreLocalRn bndr $ \ bndr' ->
mapRn rnCoreAlt alts `thenRn` \ alts' ->
returnRn (UfCase scrut' bndr' alts')
rnCoreExpr (UfNote note expr)
= rnNote note `thenRn` \ note' ->
rnCoreExpr expr `thenRn` \ expr' ->
- returnRn (UfNote note' expr')
+ returnRn (UfNote note' expr')
rnCoreExpr (UfLam bndr body)
= rnCoreBndr bndr $ \ bndr' ->
\begin{code}
rnCoreBndr (UfValBinder name ty) thing_inside
- = rnIfaceType (text str) ty `thenRn` \ ty' ->
- bindLocalsRn str [name] $ \ [name'] ->
+ = rnHsType doc ty `thenRn` \ ty' ->
+ bindCoreLocalRn name $ \ name' ->
thing_inside (UfValBinder name' ty')
where
- str = "unfolding id"
+ doc = text "unfolding id"
rnCoreBndr (UfTyBinder name kind) thing_inside
- = bindLocalsRn "unfolding tyvar" [name] $ \ [name'] ->
+ = bindCoreLocalRn name $ \ name' ->
thing_inside (UfTyBinder name' kind)
-rnCoreBndrs bndrs thing_inside -- Expect them all to be ValBinders
- = mapRn (rnIfaceType (text str)) tys `thenRn` \ tys' ->
- bindLocalsRn str names $ \ names' ->
- thing_inside (zipWith UfValBinder names' tys')
- where
- str = "unfolding id"
- names = map (\ (UfValBinder name _ ) -> name) bndrs
- tys = map (\ (UfValBinder _ ty) -> ty) bndrs
+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 `thenRn` \ con' ->
- bindLocalsRn "unfolding alt" bndrs $ \ bndrs' ->
+ = rnUfCon con `thenRn` \ con' ->
+ bindCoreLocalsRn bndrs $ \ bndrs' ->
rnCoreExpr rhs `thenRn` \ rhs' ->
returnRn (con', bndrs', rhs')
-
rnNote (UfCoerce ty)
- = rnIfaceType (text "unfolding coerce") ty `thenRn` \ ty' ->
+ = rnHsType (text "unfolding coerce") ty `thenRn` \ ty' ->
returnRn (UfCoerce ty')
rnNote (UfSCC cc) = returnRn (UfSCC cc)
rnNote UfInlineCall = returnRn UfInlineCall
+rnNote UfInlineMe = returnRn UfInlineMe
rnUfCon UfDefault
= returnRn UfDefault
-rnUfCon (UfDataCon con)
- = lookupOccRn con `thenRn` \ con' ->
- returnRn (UfDataCon con')
-
-rnUfCon (UfLitCon lit)
- = returnRn (UfLitCon lit)
+rnUfCon (UfTupleAlt (HsTupCon _ boxity arity))
+ = returnRn (UfTupleAlt (HsTupCon tup_name boxity arity))
+ where
+ tup_name = getName (tupleCon boxity arity)
-rnUfCon (UfLitLitCon lit ty)
- = rnIfaceType (text "litlit") ty `thenRn` \ ty' ->
- returnRn (UfLitLitCon lit ty')
+rnUfCon (UfDataAlt con)
+ = lookupOccRn con `thenRn` \ con' ->
+ returnRn (UfDataAlt con')
-rnUfCon (UfPrimOp op)
- = lookupOccRn op `thenRn` \ op' ->
- returnRn (UfPrimOp op')
+rnUfCon (UfLitAlt lit)
+ = returnRn (UfLitAlt lit)
-rnUfCon (UfCCallOp str casm gc)
- = returnRn (UfCCallOp str casm gc)
+rnUfCon (UfLitLitAlt lit ty)
+ = rnHsType (text "litlit") ty `thenRn` \ ty' ->
+ returnRn (UfLitLitAlt lit ty')
\end{code}
%*********************************************************
-%* *
-\subsection{Errors}
-%* *
+%* *
+\subsection{Rule shapes}
+%* *
%*********************************************************
+Check the shape of a transformation rule LHS. Currently
+we only allow LHSs of the form @(f e1 .. en)@, where @f@ is
+not one of the @forall@'d variables.
+
\begin{code}
-derivingNonStdClassErr clas
- = hsep [ptext SLIT("non-standard class"), ppr clas, ptext SLIT("in deriving clause")]
+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
+\end{code}
-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)
-dupClassAssertWarn ctxt (assertion : dups)
- = sep [hsep [ptext SLIT("Duplicate class assertion"),
- quotes (pprClassAssertion assertion),
- ptext SLIT("in the context:")],
- nest 4 (pprContext ctxt)]
+%*********************************************************
+%* *
+\subsection{Errors}
+%* *
+%*********************************************************
+\begin{code}
badDataCon name
= hsep [ptext SLIT("Illegal data constructor name"), quotes (ppr name)]
-ctxtErr1 doc tyvars ty (constraint, _)
- = addErrRn (
- sep [ptext SLIT("The constraint") <+> quotes (pprClassAssertion constraint) <+>
- ptext SLIT("does not mention any of"),
- nest 4 (ptext SLIT("the universally quantified type variables") <+> braces (interpp'SP tyvars)),
- nest 4 (ptext SLIT("of the type") <+> quotes (ppr ty))
- ]
- $$
- (ptext SLIT("In") <+> doc)
- )
-
-ctxtErr2 doc ty (constraint,_)
- = addErrRn (
- sep [ptext SLIT("The constraint") <+> quotes (pprClassAssertion constraint),
- nest 4 (ptext SLIT("mentions type variables that do not appear in the type")),
- nest 4 (quotes (ppr ty))]
- $$
- (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") <+> doubleQuotes (ptext 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)"))]
\end{code}
projects / ghc-hetmet.git / blobdiff