opt_WarnUnusedBinds, opt_WarnUnusedImports )
import HsSyn
import RdrHsSyn ( RdrNameIE )
-import RdrName ( RdrName, rdrNameModule, rdrNameOcc, isQual, mkRdrUnqual, qualifyRdrName )
+import RnHsSyn ( RenamedHsType )
+import RdrName ( RdrName, rdrNameModule, rdrNameOcc, isQual, isUnqual,
+ mkRdrUnqual, qualifyRdrName
+ )
import HsTypes ( getTyVarName, replaceTyVarName )
-import BasicTypes ( Fixity(..), FixityDirection(..) )
+
import RnMonad
import Name ( Name, Provenance(..), ExportFlag(..), NamedThing(..),
ImportReason(..), getSrcLoc,
- mkLocalName, mkGlobalName, isSystemName,
- nameOccName, nameModule, setNameModule,
+ mkLocalName, mkImportedLocalName, mkGlobalName, isSystemName,
+ nameOccName, setNameModule,
pprOccName, isLocallyDefined, nameUnique, nameOccName,
setNameProvenance, getNameProvenance, pprNameProvenance
)
mkDFunOcc,
occNameFlavour
)
-import Module ( moduleIfaceFlavour )
+import TysWiredIn ( tupleTyCon, unboxedTupleTyCon, listTyCon )
+import Type ( funTyCon )
+import Module ( ModuleName, mkThisModule, mkVanillaModule, moduleName )
import TyCon ( TyCon )
import FiniteMap
-import Unique ( Unique, Uniquable(..), unboundKey )
+import Unique ( Unique, Uniquable(..) )
import UniqFM ( emptyUFM, listToUFM, plusUFM_C )
import UniqSupply
import SrcLoc ( SrcLoc, noSrcLoc )
%*********************************************************
\begin{code}
-newImportedGlobalName :: Module -> OccName -> RnM s d Name
-newImportedGlobalName mod occ
- = -- First check the cache
+newImportedBinder :: Module -> RdrName -> RnM d Name
+-- Make a new imported binder. It might be in the cache already,
+-- but if so it will have a dopey provenance, so replace it.
+newImportedBinder mod rdr_name
+ = ASSERT2( isUnqual rdr_name, ppr rdr_name )
+
+ -- First check the cache
getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
let
- key = (mod,occ)
+ occ = rdrNameOcc rdr_name
+ key = (moduleName mod, occ)
in
case lookupFM cache key of
-- A hit in the cache!
- -- Make sure that the module in the name has the same IfaceFlavour as
- -- the module we are looking for; if not, make it so
- -- so that it has the right HiFlag component.
- -- (This is necessary for known-key things.
+ -- Overwrite the thing in the cache with a Name whose Module and Provenance
+ -- is correct. It might be in the cache arising from an *occurrence*,
+ -- whereas we are now at the binding site.
+ -- Similarly for known-key things.
-- For example, GHCmain.lhs imports as SOURCE
- -- Main; but Main.main is a known-key thing.)
- Just name | isSystemName name -- A known-key name; fix the provenance and module
- -> getOmitQualFn `thenRn` \ omit_fn ->
+ -- Main; but Main.main is a known-key thing.
+ Just name -> getOmitQualFn `thenRn` \ omit_fn ->
let
new_name = setNameProvenance (setNameModule name mod)
(NonLocalDef ImplicitImport (omit_fn name))
setNameSupplyRn (us, inst_ns, new_cache) `thenRn_`
returnRn new_name
- | otherwise
- -> returnRn name
-
Nothing -> -- Miss in the cache!
-- Build a new original name, and put it in the cache
getOmitQualFn `thenRn` \ omit_fn ->
- setModuleFlavourRn mod `thenRn` \ mod' ->
let
(us', us1) = splitUniqSupply us
uniq = uniqFromSupply us1
- name = mkGlobalName uniq mod' occ (NonLocalDef ImplicitImport (omit_fn name))
+ name = mkGlobalName uniq mod occ (NonLocalDef ImplicitImport (omit_fn name))
-- For in-scope things we improve the provenance
-- in RnNames.importsFromImportDecl
new_cache = addToFM cache key name
returnRn name
-newImportedGlobalFromRdrName rdr_name
+-- Make an imported global name, checking first to see if it's in the cache
+mkImportedGlobalName :: ModuleName -> OccName -> RnM d Name
+mkImportedGlobalName mod_name occ
+ = getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
+ let
+ key = (mod_name, occ)
+ in
+ case lookupFM cache key of
+ Just name -> returnRn name
+ Nothing -> setNameSupplyRn (us', inst_ns, new_cache) `thenRn_`
+ returnRn name
+ where
+ (us', us1) = splitUniqSupply us
+ uniq = uniqFromSupply us1
+ name = mkGlobalName uniq (mkVanillaModule mod_name) occ
+ (NonLocalDef ImplicitImport False)
+ new_cache = addToFM cache key name
+
+mkImportedGlobalFromRdrName rdr_name
| isQual rdr_name
- = newImportedGlobalName (rdrNameModule rdr_name) (rdrNameOcc rdr_name)
+ = mkImportedGlobalName (rdrNameModule rdr_name) (rdrNameOcc rdr_name)
| otherwise
= -- An Unqual is allowed; interface files contain
-- unqualified names for locally-defined things, such as
-- constructors of a data type.
- getModuleRn `thenRn ` \ mod_name ->
- newImportedGlobalName mod_name (rdrNameOcc rdr_name)
+ getModuleRn `thenRn ` \ mod_name ->
+ mkImportedGlobalName mod_name (rdrNameOcc rdr_name)
-newLocallyDefinedGlobalName :: Module -> OccName
- -> (Name -> ExportFlag) -> SrcLoc
- -> RnM s d Name
-newLocallyDefinedGlobalName mod occ rec_exp_fn loc
+newLocalTopBinder :: Module -> OccName
+ -> (Name -> ExportFlag) -> SrcLoc
+ -> RnM d Name
+newLocalTopBinder mod occ rec_exp_fn loc
= -- First check the cache
getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
let
- key = (mod,occ)
+ key = (moduleName mod,occ)
mk_prov name = LocalDef loc (rec_exp_fn name)
-- We must set the provenance of the thing in the cache
-- correctly, particularly whether or not it is locally defined.
in
setNameSupplyRn (us', inst_ns, new_cache) `thenRn_`
returnRn new_name
+\end{code}
+%*********************************************************
+%* *
+\subsection{Dfuns and default methods
+%* *
+%*********************************************************
-newLocalNames :: [(RdrName,SrcLoc)] -> RnM s d [Name]
-newLocalNames rdr_names
- = getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
- let
- n = length rdr_names
- (us', us1) = splitUniqSupply us
- uniqs = uniqsFromSupply n us1
- locals = [ mkLocalName uniq (rdrNameOcc rdr_name) loc
- | ((rdr_name,loc), uniq) <- rdr_names `zip` uniqs
- ]
- in
- setNameSupplyRn (us', inst_ns, cache) `thenRn_`
- returnRn locals
-
-newDFunName cl_occ tycon_occ (Just n) src_loc -- Imported ones have "Just n"
- = newImportedGlobalFromRdrName n
+@newImplicitBinder@ is used for (a) dfuns (b) default methods, defined in this module
-newDFunName cl_occ tycon_occ Nothing src_loc -- Local instance decls have a "Nothing"
+\begin{code}
+newImplicitBinder occ src_loc
= getModuleRn `thenRn` \ mod_name ->
- newInstUniq (cl_occ, tycon_occ) `thenRn` \ inst_uniq ->
- let
- dfun_occ = mkDFunOcc cl_occ tycon_occ inst_uniq
- in
- newLocallyDefinedGlobalName mod_name dfun_occ (\_ -> Exported) src_loc
+ newLocalTopBinder (mkThisModule mod_name) occ (\_ -> Exported) src_loc
+\end{code}
+Make a name for the dict fun for an instance decl
--- mkUnboundName makes a place-holder Name; it shouldn't be looked at except possibly
--- during compiler debugging.
-mkUnboundName :: RdrName -> Name
-mkUnboundName rdr_name = mkLocalName unboundKey (rdrNameOcc rdr_name) noSrcLoc
+\begin{code}
+newDFunName :: (OccName, OccName) -> SrcLoc -> RnMS Name
+newDFunName key@(cl_occ, tycon_occ) loc
+ = newInstUniq key `thenRn` \ inst_uniq ->
+ newImplicitBinder (mkDFunOcc cl_occ tycon_occ inst_uniq) loc
+\end{code}
-isUnboundName :: Name -> Bool
-isUnboundName name = getUnique name == unboundKey
+\begin{code}
+getDFunKey :: RenamedHsType -> (OccName, OccName) -- Used to manufacture DFun names
+getDFunKey (HsForAllTy _ _ ty) = getDFunKey ty
+getDFunKey (MonoFunTy _ ty) = getDFunKey ty
+getDFunKey (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{Binding}
+%* *
+%*********************************************************
+
\begin{code}
-------------------------------------
bindLocatedLocalsRn :: SDoc -- Documentation string for error message
-> [(RdrName,SrcLoc)]
- -> ([Name] -> RnMS s a)
- -> RnMS s a
+ -> ([Name] -> RnMS a)
+ -> RnMS a
bindLocatedLocalsRn doc_str rdr_names_w_loc enclosed_scope
= checkDupOrQualNames doc_str rdr_names_w_loc `thenRn_`
returnRn ()
) `thenRn_`
- newLocalNames rdr_names_w_loc `thenRn` \ names ->
+ getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
+ getModeRn `thenRn` \ mode ->
+ let
+ n = length rdr_names_w_loc
+ (us', us1) = splitUniqSupply us
+ uniqs = uniqsFromSupply n us1
+ names = [ mk_name uniq (rdrNameOcc rdr_name) loc
+ | ((rdr_name,loc), uniq) <- rdr_names_w_loc `zip` uniqs
+ ]
+ mk_name = case mode of
+ SourceMode -> mkLocalName
+ InterfaceMode -> mkImportedLocalName
+ -- Keep track of whether the name originally came from
+ -- an interface file.
+ in
+ setNameSupplyRn (us', inst_ns, cache) `thenRn_`
+
let
new_name_env = addListToRdrEnv name_env (map fst rdr_names_w_loc `zip` names)
in
setLocalNameEnv new_name_env (enclosed_scope names)
+
where
check_shadow name_env (rdr_name,loc)
= case lookupRdrEnv name_env rdr_name of
Just name -> pushSrcLocRn loc $
addWarnRn (shadowedNameWarn rdr_name)
+bindCoreLocalFVRn :: RdrName -> (Name -> RnMS (a, FreeVars))
+ -> RnMS (a, FreeVars)
+ -- A specialised variant when renaming stuff from interface
+ -- files (of which there is a lot)
+ -- * one at a time
+ -- * no checks for shadowing
+ -- * always imported
+ -- * deal with free vars
+bindCoreLocalFVRn rdr_name enclosed_scope
+ = getSrcLocRn `thenRn` \ loc ->
+ getLocalNameEnv `thenRn` \ name_env ->
+ getNameSupplyRn `thenRn` \ (us, inst_ns, cache) ->
+ let
+ (us', us1) = splitUniqSupply us
+ uniq = uniqFromSupply us1
+ name = mkImportedLocalName uniq (rdrNameOcc rdr_name) loc
+ in
+ setNameSupplyRn (us', inst_ns, cache) `thenRn_`
+ let
+ new_name_env = extendRdrEnv name_env rdr_name name
+ in
+ setLocalNameEnv new_name_env (enclosed_scope name) `thenRn` \ (result, fvs) ->
+ returnRn (result, delFromNameSet fvs name)
+
+bindCoreLocalsFVRn [] thing_inside = thing_inside []
+bindCoreLocalsFVRn (b:bs) thing_inside = bindCoreLocalFVRn b $ \ name' ->
+ bindCoreLocalsFVRn bs $ \ names' ->
+ thing_inside (name':names')
-------------------------------------
-bindLocalsRn doc_str rdr_names enclosed_scope
+bindLocalRn doc rdr_name enclosed_scope
+ = getSrcLocRn `thenRn` \ loc ->
+ bindLocatedLocalsRn doc [(rdr_name,loc)] $ \ (n:ns) ->
+ ASSERT( null ns )
+ enclosed_scope n
+
+bindLocalsRn doc rdr_names enclosed_scope
= getSrcLocRn `thenRn` \ loc ->
- bindLocatedLocalsRn (text doc_str)
+ bindLocatedLocalsRn doc
(rdr_names `zip` repeat loc)
enclosed_scope
-- binLocalsFVRn is the same as bindLocalsRn
-- except that it deals with free vars
-bindLocalsFVRn doc_str rdr_names enclosed_scope
- = bindLocalsRn doc_str rdr_names $ \ names ->
+bindLocalsFVRn doc rdr_names enclosed_scope
+ = bindLocalsRn doc rdr_names $ \ names ->
enclosed_scope names `thenRn` \ (thing, fvs) ->
returnRn (thing, delListFromNameSet fvs names)
-------------------------------------
-extendTyVarEnvFVRn :: [HsTyVar Name] -> RnMS s (a, FreeVars) -> RnMS s (a, FreeVars)
+extendTyVarEnvFVRn :: [HsTyVar Name] -> RnMS (a, FreeVars) -> RnMS (a, FreeVars)
-- This tiresome function is used only in rnDecl on InstDecl
extendTyVarEnvFVRn tyvars enclosed_scope
= getLocalNameEnv `thenRn` \ env ->
returnRn (thing, delListFromNameSet fvs tyvar_names)
bindTyVarsRn :: SDoc -> [HsTyVar RdrName]
- -> ([HsTyVar Name] -> RnMS s a)
- -> RnMS s a
+ -> ([HsTyVar Name] -> RnMS a)
+ -> RnMS a
bindTyVarsRn doc_str tyvar_names enclosed_scope
= bindTyVars2Rn doc_str tyvar_names $ \ names tyvars ->
enclosed_scope tyvars
-- Gruesome name: return Names as well as HsTyVars
bindTyVars2Rn :: SDoc -> [HsTyVar RdrName]
- -> ([Name] -> [HsTyVar Name] -> RnMS s a)
- -> RnMS s a
+ -> ([Name] -> [HsTyVar Name] -> RnMS a)
+ -> RnMS a
bindTyVars2Rn doc_str tyvar_names enclosed_scope
= getSrcLocRn `thenRn` \ loc ->
let
enclosed_scope names (zipWith replaceTyVarName tyvar_names names)
bindTyVarsFVRn :: SDoc -> [HsTyVar RdrName]
- -> ([HsTyVar Name] -> RnMS s (a, FreeVars))
- -> RnMS s (a, FreeVars)
+ -> ([HsTyVar Name] -> RnMS (a, FreeVars))
+ -> RnMS (a, FreeVars)
bindTyVarsFVRn doc_str rdr_names enclosed_scope
= bindTyVars2Rn doc_str rdr_names $ \ names tyvars ->
enclosed_scope tyvars `thenRn` \ (thing, fvs) ->
returnRn (thing, delListFromNameSet fvs names)
bindTyVarsFV2Rn :: SDoc -> [HsTyVar RdrName]
- -> ([Name] -> [HsTyVar Name] -> RnMS s (a, FreeVars))
- -> RnMS s (a, FreeVars)
+ -> ([Name] -> [HsTyVar Name] -> RnMS (a, FreeVars))
+ -> RnMS (a, FreeVars)
bindTyVarsFV2Rn doc_str rdr_names enclosed_scope
= bindTyVars2Rn doc_str rdr_names $ \ names tyvars ->
enclosed_scope names tyvars `thenRn` \ (thing, fvs) ->
-------------------------------------
checkDupOrQualNames, checkDupNames :: SDoc
-> [(RdrName, SrcLoc)]
- -> RnM s d ()
+ -> RnM d ()
-- Works in any variant of the renamer monad
checkDupOrQualNames doc_str rdr_names_w_loc
getModeRn `thenRn` \ mode ->
case mode of
- InterfaceMode _ -> -- Look in the global name cache
- newImportedGlobalFromRdrName rdr_name
+ InterfaceMode -> -- Look in the global name cache
+ mkImportedGlobalFromRdrName rdr_name
- SourceMode -> -- Source mode, so look up a *qualified* version
+ SourceMode -> -- Source mode, so look up a *qualified* version
-- of the name, so that we get the right one even
-- if there are many with the same occ name
-- There must *be* a binding
-- Perhaps surprisingly, even wired-in names are recorded.
-- Why? So that we know which wired-in names are referred to when
-- deciding which instance declarations to import.
-lookupOccRn :: RdrName -> RnMS s Name
+lookupOccRn :: RdrName -> RnMS Name
lookupOccRn rdr_name
= getNameEnvs `thenRn` \ (global_env, local_env) ->
- lookup_occ global_env local_env rdr_name `thenRn` \ name ->
- addOccurrenceName name
+ lookup_occ global_env local_env rdr_name
-- lookupGlobalOccRn is like lookupOccRn, except that it looks in the global
-- environment. It's used only for
-- record field names
-- class op names in class and instance decls
-lookupGlobalOccRn :: RdrName -> RnMS s Name
+lookupGlobalOccRn :: RdrName -> RnMS Name
lookupGlobalOccRn rdr_name
= getNameEnvs `thenRn` \ (global_env, local_env) ->
- lookup_global_occ global_env rdr_name `thenRn` \ name ->
- addOccurrenceName name
+ lookup_global_occ global_env rdr_name
-- Look in both local and global env
lookup_occ global_env local_env rdr_name
Nothing -> getModeRn `thenRn` \ mode ->
case mode of
-- Not found when processing source code; so fail
- SourceMode -> failUnboundNameErrRn rdr_name
+ SourceMode -> failWithRn (mkUnboundName rdr_name)
+ (unknownNameErr rdr_name)
-- Not found when processing an imported declaration,
-- so we create a new name for the purpose
- InterfaceMode _ -> newImportedGlobalFromRdrName rdr_name
+ InterfaceMode -> mkImportedGlobalFromRdrName rdr_name
-- lookupImplicitOccRn takes an RdrName representing an *original* name, and
-- whether there are any instance decls in this module are "special".
-- The name cache should have the correct provenance, though.
-lookupImplicitOccRn :: RdrName -> RnMS s Name
-lookupImplicitOccRn rdr_name
- = newImportedGlobalFromRdrName rdr_name `thenRn` \ name ->
- addOccurrenceName name
-
-addImplicitOccRn :: Name -> RnMS s Name
-addImplicitOccRn name = addOccurrenceName name
-
-addImplicitOccsRn :: [Name] -> RnMS s ()
-addImplicitOccsRn names = addOccurrenceNames names
-\end{code}
-
-\begin{code}
-lookupFixity :: Name -> RnMS s Fixity
-lookupFixity name
- = getFixityEnv `thenRn` \ fixity_env ->
- case lookupNameEnv fixity_env name of
- Just (FixitySig _ fixity _) -> returnRn fixity
- Nothing -> returnRn (Fixity 9 InfixL) -- Default case
+lookupImplicitOccRn :: RdrName -> RnMS Name
+lookupImplicitOccRn rdr_name = mkImportedGlobalFromRdrName rdr_name
\end{code}
unQualInScope returns a function that takes a Name and tells whether
%* *
%************************************************************************
-=============== RnEnv ================
-\begin{code}
-plusRnEnv (RnEnv n1 f1) (RnEnv n2 f2)
- = RnEnv (n1 `plusGlobalRdrEnv` n2)
- (f1 `plusNameEnv` f2)
-\end{code}
-
-
=============== NameEnv ================
\begin{code}
plusGlobalRdrEnv :: GlobalRdrEnv -> GlobalRdrEnv -> GlobalRdrEnv
=============== ExportAvails ================
\begin{code}
-mkEmptyExportAvails :: Module -> ExportAvails
+mkEmptyExportAvails :: ModuleName -> ExportAvails
mkEmptyExportAvails mod_name = (unitFM mod_name [], emptyUFM)
-mkExportAvails :: Module -> Bool -> GlobalRdrEnv -> [AvailInfo] -> ExportAvails
+mkExportAvails :: ModuleName -> Bool -> GlobalRdrEnv -> [AvailInfo] -> ExportAvails
mkExportAvails mod_name unqual_imp name_env avails
= (mod_avail_env, entity_avail_env)
where
emptyFVs :: FreeVars
plusFVs :: [FreeVars] -> FreeVars
-emptyFVs = emptyNameSet
-plusFVs = unionManyNameSets
-plusFV = unionNameSets
+isEmptyFVs = isEmptyNameSet
+emptyFVs = emptyNameSet
+plusFVs = unionManyNameSets
+plusFV = unionNameSets
-- No point in adding implicitly imported names to the free-var set
addOneFV s n = addOneToNameSet s n
unitFV n = unitNameSet n
+
+-- A useful utility
+mapFvRn f xs = mapRn f xs `thenRn` \ stuff ->
+ let
+ (ys, fvs_s) = unzip stuff
+ in
+ returnRn (ys, plusFVs fvs_s)
\end{code}
\begin{code}
-warnUnusedLocalBinds, warnUnusedTopNames, warnUnusedMatches :: [Name] -> RnM s d ()
+warnUnusedLocalBinds, warnUnusedTopNames, warnUnusedMatches :: [Name] -> RnM d ()
warnUnusedTopNames names
| not opt_WarnUnusedBinds && not opt_WarnUnusedImports = returnRn () -- Don't force ns unless necessary
-------------------------
-warnUnusedBinds :: (Bool -> Bool) -> [Name] -> RnM s d ()
+warnUnusedBinds :: (Bool -> Bool) -> [Name] -> RnM d ()
warnUnusedBinds warn_when_local names
= mapRn_ (warnUnusedGroup warn_when_local) groups
where
-------------------------
-warnUnusedGroup :: (Bool -> Bool) -> [Name] -> RnM s d ()
+warnUnusedGroup :: (Bool -> Bool) -> [Name] -> RnM d ()
warnUnusedGroup _ []
= returnRn ()
4 (vcat [ppr how_in_scope1,
ppr how_in_scope2])
-failUnboundNameErrRn :: RdrName -> RnM s d Name
-failUnboundNameErrRn rdr_name =
- failWithRn (mkUnboundName rdr_name)
- (unknownNameErr rdr_name)
-
shadowedNameWarn shadow
= hsep [ptext SLIT("This binding for"),
quotes (ppr shadow),
projects / ghc-hetmet.git / blobdiff