import FlattenInfo ( namesNeededForFlattening )
import HsSyn
import RnHsSyn ( RenamedFixitySig )
-import RdrHsSyn ( RdrNameIE, RdrNameHsType, RdrNameFixitySig, extractHsTyRdrTyVars )
+import RdrHsSyn ( RdrNameHsType, extractHsTyRdrTyVars )
import RdrName ( RdrName, rdrNameModule, rdrNameOcc, isQual, isUnqual, isOrig,
- mkRdrUnqual, mkRdrQual, setRdrNameOcc,
- lookupRdrEnv, foldRdrEnv, rdrEnvToList, elemRdrEnv,
- unqualifyRdrName
+ mkRdrUnqual, mkRdrQual, setRdrNameSpace, rdrNameOcc,
+ lookupRdrEnv, rdrEnvToList, elemRdrEnv,
+ extendRdrEnv, addListToRdrEnv, emptyRdrEnv,
+ isExact_maybe, unqualifyRdrName
)
import HsTypes ( hsTyVarName, replaceTyVarName )
import HscTypes ( Provenance(..), pprNameProvenance, hasBetterProv,
- ImportReason(..), GlobalRdrEnv, GlobalRdrElt(..), AvailEnv,
- AvailInfo, Avails, GenAvailInfo(..), NameSupply(..),
- ModIface(..), GhciMode(..),
- Deprecations(..), lookupDeprec,
- extendLocalRdrEnv, lookupFixity
+ ImportReason(..), GlobalRdrEnv, GlobalRdrElt(..),
+ GenAvailInfo(..), AvailInfo, Avails,
+ ModIface(..), NameCache(..),
+ Deprecations(..), lookupDeprec, isLocalGRE,
+ extendLocalRdrEnv, availName, availNames,
+ lookupFixity
)
-import RnMonad
-import Name ( Name,
- getSrcLoc, nameIsLocalOrFrom,
- mkInternalName, mkExternalName,
- mkIPName, nameOccName, nameModule_maybe,
- setNameModuleAndLoc, nameModule
- )
-import NameEnv
+import TcRnMonad
+import Name ( Name, getName, getSrcLoc, nameIsLocalOrFrom, isWiredInName,
+ mkInternalName, mkExternalName, mkIPName,
+ nameOccName, setNameModuleAndLoc, nameModule )
import NameSet
-import OccName ( OccName, occNameUserString, occNameFlavour,
- isDataSymOcc, setOccNameSpace, tcName )
-import Module ( ModuleName, moduleName, mkVanillaModule,
- mkSysModuleNameFS, moduleNameFS, WhereFrom(..) )
-import PrelNames ( mkUnboundName,
- derivingOccurrences,
- mAIN_Name, main_RDR_Unqual,
- runIOName, intTyConName,
+import OccName ( OccName, tcName, isDataOcc, occNameUserString, occNameFlavour )
+import Module ( Module, ModuleName, moduleName, mkVanillaModule )
+import PrelNames ( mkUnboundName, intTyConName, qTyConName,
boolTyConName, funTyConName,
unpackCStringName, unpackCStringFoldrName, unpackCStringUtf8Name,
eqStringName, printName,
- bindIOName, returnIOName, failIOName, thenIOName
+ bindIOName, returnIOName, failIOName, thenIOName,
+ templateHaskellNames
)
import TysWiredIn ( unitTyCon ) -- A little odd
import FiniteMap
import SrcLoc ( SrcLoc, noSrcLoc )
import Outputable
import ListSetOps ( removeDups, equivClasses )
-import Util ( sortLt )
-import BasicTypes ( mapIPName, defaultFixity )
+import BasicTypes ( mapIPName, FixitySig(..) )
import List ( nub )
-import UniqFM ( lookupWithDefaultUFM )
-import Maybe ( mapMaybe )
-import Maybes ( orElse, catMaybes )
import CmdLineOpts
import FastString ( FastString )
\end{code}
%*********************************************************
\begin{code}
-newTopBinder :: Module -> RdrName -> SrcLoc -> RnM d Name
+newTopBinder :: Module -> RdrName -> SrcLoc -> TcRn m Name
-- newTopBinder puts into the cache the binder with the
-- module information set correctly. When the decl is later renamed,
-- the binding site will thereby get the correct module.
-- the occurrences, so that doesn't matter
newTopBinder mod rdr_name loc
- = -- First check the cache
+ | Just name <- isExact_maybe rdr_name
+ = returnM name
- -- There should never be a qualified name in a binding position (except in instance decls)
- -- The parser doesn't check this because the same parser parses instance decls
- (if isQual rdr_name then
- qualNameErr (text "In its declaration") (rdr_name,loc)
- else
- returnRn ()
- ) `thenRn_`
-
- getNameSupplyRn `thenRn` \ name_supply ->
+ | otherwise
+ = -- First check the cache
+ getNameCache `thenM` \ name_supply ->
let
occ = rdrNameOcc rdr_name
key = (moduleName mod, occ)
-- b) its defining SrcLoc
-- So we update this info
- Just name -> let
- new_name = setNameModuleAndLoc name mod loc
- new_cache = addToFM cache key new_name
- in
- setNameSupplyRn (name_supply {nsNames = new_cache}) `thenRn_`
--- traceRn (text "newTopBinder: overwrite" <+> ppr new_name) `thenRn_`
- returnRn new_name
+ Just name
+ | isWiredInName name -> returnM name
+ -- Don't mess with wired-in names. Apart from anything
+ -- else, their wired-in-ness is in the SrcLoca
+ | otherwise
+ -> let
+ new_name = setNameModuleAndLoc name mod loc
+ new_cache = addToFM cache key new_name
+ in
+ setNameCache (name_supply {nsNames = new_cache}) `thenM_`
+ returnM new_name
-- Miss in the cache!
-- Build a completely new Name, and put it in the cache
-- Even for locally-defined names we use implicitImportProvenance;
-- updateProvenances will set it to rights
- Nothing -> let
- (us', us1) = splitUniqSupply (nsUniqs name_supply)
- uniq = uniqFromSupply us1
- new_name = mkExternalName uniq mod occ loc
- new_cache = addToFM cache key new_name
- in
- setNameSupplyRn (name_supply {nsUniqs = us', nsNames = new_cache}) `thenRn_`
--- traceRn (text "newTopBinder: new" <+> ppr new_name) `thenRn_`
- returnRn new_name
-
-
-newGlobalName :: ModuleName -> OccName -> RnM d Name
+ Nothing -> addNewName name_supply key mod occ loc
+
+newGlobalName :: ModuleName -> OccName -> TcRn m Name
-- Used for *occurrences*. We make a place-holder Name, really just
-- to agree on its unique, which gets overwritten when we read in
-- the binding occurence later (newTopBinder)
-- (but since it affects DLL-ery it does matter that we get it right
-- in the end).
newGlobalName mod_name occ
- = getNameSupplyRn `thenRn` \ name_supply ->
+ = getNameCache `thenM` \ name_supply ->
let
key = (mod_name, occ)
cache = nsNames name_supply
in
case lookupFM cache key of
- Just name -> -- traceRn (text "newGlobalName: hit" <+> ppr name) `thenRn_`
- returnRn name
-
- Nothing -> setNameSupplyRn (name_supply {nsUniqs = us', nsNames = new_cache}) `thenRn_`
- -- traceRn (text "newGlobalName: new" <+> ppr name) `thenRn_`
- returnRn name
- where
- (us', us1) = splitUniqSupply (nsUniqs name_supply)
- uniq = uniqFromSupply us1
- mod = mkVanillaModule mod_name
- name = mkExternalName uniq mod occ noSrcLoc
- new_cache = addToFM cache key name
+ Just name -> -- traceRn (text "newGlobalName: hit" <+> ppr name) `thenM_`
+ returnM name
+
+ Nothing -> -- traceRn (text "newGlobalName: new" <+> ppr name) `thenM_`
+ addNewName name_supply key (mkVanillaModule mod_name) occ noSrcLoc
+
+-- Look up a "system name" in the name cache.
+-- This is done by the type checker...
+-- For *source* declarations, this will put the thing into the name cache
+-- For *interface* declarations, RnHiFiles.getSysBinders will already have
+-- put it into the cache.
+lookupSysName :: Name -- Base name
+ -> (OccName -> OccName) -- Occurrence name modifier
+ -> TcRn m Name -- System name
+lookupSysName base_name mk_sys_occ
+ = getNameCache `thenM` \ name_supply ->
+ let
+ mod = nameModule base_name
+ occ = mk_sys_occ (nameOccName base_name)
+ key = (moduleName mod, occ)
+ in
+ case lookupFM (nsNames name_supply) key of
+ Just name -> returnM name
+ Nothing -> addNewName name_supply key mod occ noSrcLoc
newIPName rdr_name_ip
- = getNameSupplyRn `thenRn` \ name_supply ->
+ = getNameCache `thenM` \ name_supply ->
let
ipcache = nsIPs name_supply
in
case lookupFM ipcache key of
- Just name_ip -> returnRn name_ip
- Nothing -> setNameSupplyRn new_ns `thenRn_`
- returnRn name_ip
+ Just name_ip -> returnM name_ip
+ Nothing -> setNameCache new_ns `thenM_`
+ returnM name_ip
where
(us', us1) = splitUniqSupply (nsUniqs name_supply)
uniq = uniqFromSupply us1
new_ns = name_supply {nsUniqs = us', nsIPs = new_ipcache}
where
key = rdr_name_ip -- Ensures that ?x and %x get distinct Names
+
+addNewName :: NameCache -> (ModuleName,OccName)
+ -> Module -> OccName -> SrcLoc -> TcRn m Name
+-- Internal function: extend the name cache, dump it back into
+-- the monad, and return the new name
+-- (internal, hence the rather redundant interface)
+addNewName name_supply key mod occ loc
+ = setNameCache new_name_supply `thenM_`
+ returnM name
+ where
+ (us', us1) = splitUniqSupply (nsUniqs name_supply)
+ uniq = uniqFromSupply us1
+ name = mkExternalName uniq mod occ loc
+ new_cache = addToFM (nsNames name_supply) key name
+ new_name_supply = name_supply {nsUniqs = us', nsNames = new_cache}
\end{code}
%*********************************************************
\begin{code}
lookupBndrRn rdr_name
- = getLocalNameEnv `thenRn` \ local_env ->
+ = getLocalRdrEnv `thenM` \ local_env ->
case lookupRdrEnv local_env rdr_name of
- Just name -> returnRn name
+ Just name -> returnM name
Nothing -> lookupTopBndrRn rdr_name
lookupTopBndrRn rdr_name
-- A separate function (importsFromLocalDecls) reports duplicate top level
-- decls, so here it's safe just to choose an arbitrary one.
- | isOrig rdr_name
+ -- There should never be a qualified name in a binding position
+ -- The parser could check this, but doesn't (yet)
+ | isQual rdr_name
+ = getSrcLocM `thenM` \ loc ->
+ qualNameErr (text "In its declaration") (rdr_name,loc) `thenM_`
+ returnM (mkUnboundName rdr_name)
+
+ | otherwise
+ = ASSERT( not (isOrig rdr_name) )
+ -- Original names are used only for occurrences,
+ -- not binding sites
+
+ getModeRn `thenM` \ mode ->
+ case mode of
+ InterfaceMode mod ->
+ getSrcLocM `thenM` \ loc ->
+ newTopBinder mod rdr_name loc
+
+ other -> lookupTopSrcBndr rdr_name
+
+lookupTopSrcBndr :: RdrName -> TcRn m Name
+lookupTopSrcBndr rdr_name
+ = lookupTopSrcBndr_maybe rdr_name `thenM` \ maybe_name ->
+ case maybe_name of
+ Just name -> returnM name
+ Nothing -> unboundName rdr_name
+
+
+lookupTopSrcBndr_maybe :: RdrName -> TcRn m (Maybe Name)
+-- Look up a source-code binder
+
+-- Ignores imported names; for example, this is OK:
+-- import Foo( f )
+-- infix 9 f -- The 'f' here does not need to be qualified
+-- f x = x -- Nor here, of course
+
+lookupTopSrcBndr_maybe rdr_name
+ | Just name <- isExact_maybe rdr_name
-- This is here just to catch the PrelBase defn of (say) [] and similar
- -- The parser reads the special syntax and returns an Orig RdrName
+ -- The parser reads the special syntax and returns an Exact RdrName
-- But the global_env contains only Qual RdrNames, so we won't
-- find it there; instead just get the name via the Orig route
--
- = -- This is a binding site for the name, so check first that it
+ -- We are at a binding site for the name, so check first that it
-- the current module is the correct one; otherwise GHC can get
-- very confused indeed. This test rejects code like
-- data T = (,) Int Int
-- unless we are in GHC.Tup
- getModuleRn `thenRn` \ mod ->
- checkRn (moduleName mod == rdrNameModule rdr_name)
- (badOrigBinding rdr_name) `thenRn_`
- lookupOrigName rdr_name
+ = getModule `thenM` \ mod ->
+ checkErr (moduleName mod == moduleName (nameModule name))
+ (badOrigBinding rdr_name) `thenM_`
+ returnM (Just name)
| otherwise
- = getModeRn `thenRn` \ mode ->
- if isInterfaceMode mode
- then lookupSysBinder rdr_name
- -- lookupSysBinder uses the Module in the monad to set
- -- the correct module for the binder. This is important because
- -- when GHCi is reading in an old interface, it just sucks it
- -- in entire (Rename.loadHomeDecls) which uses lookupTopBndrRn
- -- rather than via the iface file cache which uses newTopBndrRn
- -- We must get the correct Module into the thing.
-
- else
- getModuleRn `thenRn` \ mod ->
- getGlobalNameEnv `thenRn` \ global_env ->
- case lookup_local mod global_env rdr_name of
- Just name -> returnRn name
- Nothing -> failWithRn (mkUnboundName rdr_name)
- (unknownNameErr rdr_name)
-
-lookup_local mod global_env rdr_name
- = case lookupRdrEnv global_env rdr_name of
- Nothing -> Nothing
- Just gres -> case [n | GRE n _ _ <- gres, nameIsLocalOrFrom mod n] of
- [] -> Nothing
- (n:ns) -> Just n
+ = getGlobalRdrEnv `thenM` \ global_env ->
+ case lookupRdrEnv global_env rdr_name of
+ Nothing -> returnM Nothing
+ Just gres -> case [gre_name gre | gre <- gres, isLocalGRE gre] of
+ [] -> returnM Nothing
+ (n:ns) -> returnM (Just n)
-- lookupSigOccRn is used for type signatures and pragmas
-- The Haskell98 report does not stipulate this, but it will!
-- So we must treat the 'f' in the signature in the same way
-- as the binding occurrence of 'f', using lookupBndrRn
-lookupSigOccRn :: RdrName -> RnMS Name
+lookupSigOccRn :: RdrName -> RnM Name
lookupSigOccRn = lookupBndrRn
-- lookupInstDeclBndr is used for the binders in an
-- instance declaration. Here we use the class name to
-- disambiguate.
-lookupInstDeclBndr :: Name -> RdrName -> RnMS Name
+lookupInstDeclBndr :: Name -> RdrName -> RnM Name
-- We use the selector name as the binder
lookupInstDeclBndr cls_name rdr_name
- | isOrig rdr_name -- Occurs in derived instances, where we just
- -- refer diectly to the right method
- = lookupOrigName rdr_name
-
- | otherwise
- = getGlobalAvails `thenRn` \ avail_env ->
- case lookupNameEnv avail_env cls_name of
- -- The class itself isn't in scope, so cls_name is unboundName
- -- e.g. import Prelude hiding( Ord )
- -- instance Ord T where ...
- -- The program is wrong, but that should not cause a crash.
- Nothing -> returnRn (mkUnboundName rdr_name)
+ | isUnqual rdr_name
+ = -- Find all the things the class op name maps to
+ -- and pick the one with the right parent name
+ getGblEnv `thenM` \ gbl_env ->
+ let
+ avail_env = imp_env (tcg_imports gbl_env)
+ in
+ case lookupAvailEnv avail_env cls_name of
+ Nothing ->
+ -- If the class itself isn't in scope, then cls_name will
+ -- be unboundName, and there'll already be an error for
+ -- that in the error list. Example:
+ -- e.g. import Prelude hiding( Ord )
+ -- instance Ord T where ...
+ -- The program is wrong, but that should not cause a crash.
+ returnM (mkUnboundName rdr_name)
+
Just (AvailTC _ ns) -> case [n | n <- ns, nameOccName n == occ] of
- (n:ns)-> ASSERT( null ns ) returnRn n
- [] -> failWithRn (mkUnboundName rdr_name)
- (unknownNameErr rdr_name)
+ (n:ns)-> ASSERT( null ns ) returnM n
+ [] -> unboundName rdr_name
+
other -> pprPanic "lookupInstDeclBndr" (ppr cls_name)
+
+ | isQual rdr_name -- Should never have a qualified name in a binding position
+ = getSrcLocM `thenM` \ loc ->
+ qualNameErr (text "In an instance method") (rdr_name,loc) `thenM_`
+ returnM (mkUnboundName rdr_name)
+
+ | otherwise -- Occurs in derived instances, where we just
+ -- refer directly to the right method, and avail_env
+ -- isn't available
+ = ASSERT2( not (isQual rdr_name), ppr rdr_name )
+ lookupOrigName rdr_name
+
where
occ = rdrNameOcc rdr_name
+lookupSysBndr :: RdrName -> RnM Name
+-- Used for the 'system binders' in a data type or class declaration
+-- Do *not* look up in the RdrEnv; these system binders are never in scope
+-- Instead, get the module from the monad... but remember that
+-- where the module is depends on whether we are renaming source or
+-- interface file stuff
+lookupSysBndr rdr_name
+ = getSrcLocM `thenM` \ loc ->
+ getModeRn `thenM` \ mode ->
+ case mode of
+ InterfaceMode mod -> newTopBinder mod rdr_name loc
+ other -> getModule `thenM` \ mod ->
+ newTopBinder mod rdr_name loc
+
-- lookupOccRn looks up an occurrence of a RdrName
-lookupOccRn :: RdrName -> RnMS Name
+lookupOccRn :: RdrName -> RnM Name
lookupOccRn rdr_name
- = getLocalNameEnv `thenRn` \ local_env ->
+ = getLocalRdrEnv `thenM` \ local_env ->
case lookupRdrEnv local_env rdr_name of
- Just name -> returnRn name
+ Just name -> returnM name
Nothing -> lookupGlobalOccRn rdr_name
-- lookupGlobalOccRn is like lookupOccRn, except that it looks in the global
-- class op names in class and instance decls
lookupGlobalOccRn rdr_name
- = getModeRn `thenRn` \ mode ->
- if (isInterfaceMode mode)
- then lookupIfaceName rdr_name
- else
+ = getModeRn `thenM` \ mode ->
+ case mode of
+ InterfaceMode mod -> lookupIfaceName mod rdr_name
+ SourceMode -> lookupSrcName rdr_name
- getGlobalNameEnv `thenRn` \ global_env ->
- case mode of
- SourceMode -> lookupSrcName global_env rdr_name
-
- CmdLineMode
+ CmdLineMode
| not (isQual rdr_name) ->
- lookupSrcName global_env rdr_name
+ lookupSrcName rdr_name
-- We allow qualified names on the command line to refer to
-- *any* name exported by any module in scope, just as if
-- it isn't there, we manufacture a new occurrence of an
-- original name.
| otherwise ->
- case lookupRdrEnv global_env rdr_name of
- Just _ -> lookupSrcName global_env rdr_name
- Nothing -> lookupQualifiedName rdr_name
+ lookupSrcName_maybe rdr_name `thenM` \ mb_name ->
+ case mb_name of
+ Just name -> returnM name
+ Nothing -> lookupQualifiedName rdr_name
--- a qualified name on the command line can refer to any module at all: we
+-- A qualified name on the command line can refer to any module at all: we
-- try to load the interface if we don't already have it.
-lookupQualifiedName :: RdrName -> RnM d Name
+lookupQualifiedName :: RdrName -> TcRn m Name
lookupQualifiedName rdr_name
= let
mod = rdrNameModule rdr_name
occ = rdrNameOcc rdr_name
in
- loadInterface (ppr rdr_name) mod ImportByUser `thenRn` \ iface ->
+ loadInterface (ppr rdr_name) mod (ImportByUser False) `thenM` \ iface ->
case [ name | (_,avails) <- mi_exports iface,
avail <- avails,
name <- availNames avail,
nameOccName name == occ ] of
- (n:ns) -> ASSERT (null ns) returnRn n
- _ -> failWithRn (mkUnboundName rdr_name) (unknownNameErr rdr_name)
-
-lookupSrcName :: GlobalRdrEnv -> RdrName -> RnM d Name
--- NB: passed GlobalEnv explicitly, not necessarily in RnMS monad
-lookupSrcName global_env rdr_name
- | isOrig rdr_name -- Can occur in source code too
- = lookupOrigName rdr_name
+ (n:ns) -> ASSERT (null ns) returnM n
+ _ -> unboundName rdr_name
+
+lookupSrcName :: RdrName -> TcRn m Name
+lookupSrcName rdr_name
+ = lookupSrcName_maybe rdr_name `thenM` \ mb_name ->
+ case mb_name of
+ Nothing -> unboundName rdr_name
+ Just name -> returnM name
+
+lookupSrcName_maybe :: RdrName -> TcRn m (Maybe Name)
+lookupSrcName_maybe rdr_name
+ | Just name <- isExact_maybe rdr_name -- Can occur in source code too
+ = returnM (Just name)
+
+ | isOrig rdr_name -- An original name
+ = newGlobalName (rdrNameModule rdr_name)
+ (rdrNameOcc rdr_name) `thenM` \ name ->
+ returnM (Just name)
| otherwise
- = case lookupRdrEnv global_env rdr_name of
- Just [GRE name _ Nothing] -> returnRn name
- Just [GRE name _ (Just deprec)] -> warnDeprec name deprec `thenRn_`
- returnRn name
- Just stuff@(GRE name _ _ : _) -> addNameClashErrRn rdr_name stuff `thenRn_`
- returnRn name
- Nothing -> failWithRn (mkUnboundName rdr_name)
- (unknownNameErr rdr_name)
-
-lookupOrigName :: RdrName -> RnM d Name
-lookupOrigName rdr_name
- = -- NO: ASSERT( isOrig rdr_name )
- -- Now that .hi-boot files are read by the main parser, they contain
- -- ordinary qualified names (which we treat as Orig names here).
- newGlobalName (rdrNameModule rdr_name) (rdrNameOcc rdr_name)
-
-lookupIfaceUnqual :: RdrName -> RnM d Name
-lookupIfaceUnqual rdr_name
- = ASSERT( isUnqual rdr_name )
+ = lookupGRE rdr_name `thenM` \ mb_gre ->
+ case mb_gre of
+ Nothing -> returnM Nothing
+ Just gre -> returnM (Just (gre_name gre))
+
+lookupGRE :: RdrName -> TcRn m (Maybe GlobalRdrElt)
+lookupGRE rdr_name
+ = getGlobalRdrEnv `thenM` \ global_env ->
+ case lookupRdrEnv global_env rdr_name of
+ Just [gre] -> case gre_deprec gre of
+ Nothing -> returnM (Just gre)
+ Just _ -> warnDeprec gre `thenM_`
+ returnM (Just gre)
+ Just stuff@(gre : _) -> addNameClashErrRn rdr_name stuff `thenM_`
+ returnM (Just gre)
+ Nothing -> return Nothing
+
+lookupIfaceName :: Module -> RdrName -> TcRn m Name
-- An Unqual is allowed; interface files contain
-- unqualified names for locally-defined things, such as
-- constructors of a data type.
- getModuleRn `thenRn ` \ mod ->
- newGlobalName (moduleName mod) (rdrNameOcc rdr_name)
-
-lookupIfaceName :: RdrName -> RnM d Name
-lookupIfaceName rdr_name
- | isUnqual rdr_name = lookupIfaceUnqual rdr_name
+lookupIfaceName mod rdr_name
+ | isUnqual rdr_name = newGlobalName (moduleName mod) (rdrNameOcc rdr_name)
| otherwise = lookupOrigName rdr_name
-\end{code}
-@lookupOrigName@ takes an RdrName representing an {\em original}
-name, and adds it to the occurrence pool so that it'll be loaded
-later. This is used when language constructs (such as monad
-comprehensions, overloaded literals, or deriving clauses) require some
-stuff to be loaded that isn't explicitly mentioned in the code.
-
-This doesn't apply in interface mode, where everything is explicit,
-but we don't check for this case: it does no harm to record an
-``extra'' occurrence and @lookupOrigNames@ isn't used much in
-interface mode (it's only the @Nothing@ clause of @rnDerivs@ that
-calls it at all I think).
-
- \fbox{{\em Jan 98: this comment is wrong: @rnHsType@ uses it quite a bit.}}
-
-\begin{code}
-lookupOrigNames :: [RdrName] -> RnM d NameSet
-lookupOrigNames rdr_names
- = mapRn lookupOrigName rdr_names `thenRn` \ names ->
- returnRn (mkNameSet names)
+lookupOrigName :: RdrName -> TcRn m Name
+ -- Just for original or exact names
+lookupOrigName rdr_name
+ | Just n <- isExact_maybe rdr_name
+ -- This happens in derived code, which we
+ -- rename in InterfaceMode
+ = returnM n
+
+ | otherwise -- Usually Orig, but can be a Qual when
+ -- we are reading a .hi-boot file
+ = newGlobalName (rdrNameModule rdr_name) (rdrNameOcc rdr_name)
+
+
+dataTcOccs :: RdrName -> [RdrName]
+-- If the input is a data constructor, return both it and a type
+-- constructor. This is useful when we aren't sure which we are
+-- looking at
+dataTcOccs rdr_name
+ | isDataOcc occ = [rdr_name, rdr_name_tc]
+ | otherwise = [rdr_name]
+ where
+ occ = rdrNameOcc rdr_name
+ rdr_name_tc = setRdrNameSpace rdr_name tcName
\end{code}
-lookupSysBinder is used for the "system binders" of a type, class, or
-instance decl. It ensures that the module is set correctly in the
-name cache, and sets the provenance on the returned name too. The
-returned name will end up actually in the type, class, or instance.
-
\begin{code}
-lookupSysBinder rdr_name
- = ASSERT( isUnqual rdr_name )
- getModuleRn `thenRn` \ mod ->
- getSrcLocRn `thenRn` \ loc ->
- newTopBinder mod rdr_name loc
+unboundName rdr_name = addErr (unknownNameErr rdr_name) `thenM_`
+ returnM (mkUnboundName rdr_name)
\end{code}
-
%*********************************************************
%* *
-\subsection{Looking up fixities}
+ Fixities
%* *
%*********************************************************
+\begin{code}
+--------------------------------
+bindLocalFixities :: [RenamedFixitySig] -> RnM a -> RnM a
+-- Used for nested fixity decls
+-- No need to worry about type constructors here,
+-- Should check for duplicates but we don't
+bindLocalFixities fixes thing_inside
+ | null fixes = thing_inside
+ | otherwise = extendFixityEnv new_bit thing_inside
+ where
+ new_bit = [(n,s) | s@(FixitySig n _ _) <- fixes]
+\end{code}
+
+--------------------------------
lookupFixity is a bit strange.
* Nested local fixity decls are put in the local fixity env, which we
We put them all in the local fixity environment
\begin{code}
-lookupFixityRn :: Name -> RnMS Fixity
+lookupFixityRn :: Name -> RnM Fixity
lookupFixityRn name
- = getModuleRn `thenRn` \ this_mod ->
+ = getModule `thenM` \ this_mod ->
if nameIsLocalOrFrom this_mod name
then -- It's defined in this module
- getFixityEnv `thenRn` \ local_fix_env ->
- returnRn (lookupLocalFixity local_fix_env name)
+ getFixityEnv `thenM` \ local_fix_env ->
+ returnM (lookupFixity local_fix_env name)
else -- It's imported
-- For imported names, we have to get their fixities by doing a
-- nothing from B will be used). When we come across a use of
-- 'f', we need to know its fixity, and it's then, and only
-- then, that we load B.hi. That is what's happening here.
- loadInterface doc name_mod ImportBySystem `thenRn` \ iface ->
- returnRn (lookupFixity (mi_fixities iface) name)
+ loadInterface doc name_mod ImportBySystem `thenM` \ iface ->
+ returnM (lookupFixity (mi_fixities iface) name)
where
doc = ptext SLIT("Checking fixity for") <+> ppr name
name_mod = moduleName (nameModule name)
-
---------------------------------
-lookupLocalFixity :: LocalFixityEnv -> Name -> Fixity
-lookupLocalFixity env name
- = case lookupNameEnv env name of
- Just (FixitySig _ fix _) -> fix
- Nothing -> defaultFixity
-
-extendNestedFixityEnv :: [(Name, RenamedFixitySig)] -> RnMS a -> RnMS a
--- Used for nested fixity decls
--- No need to worry about type constructors here,
--- Should check for duplicates but we don't
-extendNestedFixityEnv fixes enclosed_scope
- = getFixityEnv `thenRn` \ fix_env ->
- let
- new_fix_env = extendNameEnvList fix_env fixes
- in
- setFixityEnv new_fix_env enclosed_scope
-
-mkTopFixityEnv :: GlobalRdrEnv -> [RdrNameFixitySig] -> RnMG LocalFixityEnv
-mkTopFixityEnv gbl_env fix_sigs
- = getModuleRn `thenRn` \ mod ->
- let
- -- GHC extension: look up both the tycon and data con
- -- for con-like things
- -- If neither are in scope, report an error; otherwise
- -- add both to the fixity env
- go fix_env (FixitySig rdr_name fixity loc)
- = case catMaybes (map (lookup_local mod gbl_env) rdr_names) of
- [] -> pushSrcLocRn loc $
- addErrRn (unknownNameErr rdr_name) `thenRn_`
- returnRn fix_env
- ns -> foldlRn add fix_env ns
-
- where
- add fix_env name
- = case lookupNameEnv fix_env name of
- Just (FixitySig _ _ loc') -> addErrRn (dupFixityDecl rdr_name loc loc') `thenRn_`
- returnRn fix_env
- Nothing -> returnRn (extendNameEnv fix_env name (FixitySig name fixity loc))
-
- rdr_names | isDataSymOcc occ = [rdr_name, rdr_name_tc]
- | otherwise = [rdr_name]
-
- occ = rdrNameOcc rdr_name
- rdr_name_tc = setRdrNameOcc rdr_name (setOccNameSpace occ tcName)
- in
- foldlRn go emptyLocalFixityEnv fix_sigs
\end{code}
mentioned explicitly, but which might be needed by the type checker.
\begin{code}
-getImplicitStmtFVs -- Compiling a statement
- = returnRn (mkFVs [printName, bindIOName, thenIOName,
- returnIOName, failIOName]
- `plusFV` ubiquitousNames)
+implicitStmtFVs source_fvs -- Compiling a statement
+ = stmt_fvs `plusFV` implicitModuleFVs source_fvs
+ where
+ stmt_fvs = mkFVs [printName, bindIOName, thenIOName, returnIOName, failIOName]
-- These are all needed implicitly when compiling a statement
-- See TcModule.tc_stmts
-getImplicitModuleFVs decls -- Compiling a module
- = lookupOrigNames deriv_occs `thenRn` \ deriving_names ->
- returnRn (deriving_names `plusFV` ubiquitousNames)
- where
- -- deriv_classes is now a list of HsTypes, so a "normal" one
- -- appears as a (HsClassP c []). The non-normal ones for the new
- -- newtype-deriving extension, and they don't require any
- -- implicit names, so we can silently filter them out.
- deriv_occs = [occ | TyClD (TyData {tcdDerivs = Just deriv_classes}) <- decls,
- HsClassP cls [] <- deriv_classes,
- occ <- lookupWithDefaultUFM derivingOccurrences [] cls ]
+implicitModuleFVs source_fvs
+ = mkTemplateHaskellFVs source_fvs `plusFV`
+ namesNeededForFlattening `plusFV`
+ ubiquitousNames
+
+ -- This is a bit of a hack. When we see the Template-Haskell construct
+ -- [| expr |]
+ -- we are going to need lots of the ``smart constructors'' defined in
+ -- the main Template Haskell data type module. Rather than treat them
+ -- all as free vars at every occurrence site, we just make the Q type
+ -- consructor a free var.... and then use that here to haul in the others
+mkTemplateHaskellFVs source_fvs
+#ifdef GHCI
+ -- Only if Template Haskell is enabled
+ | qTyConName `elemNameSet` source_fvs = templateHaskellNames
+#endif
+ | otherwise = emptyFVs
-- ubiquitous_names are loaded regardless, because
-- they are needed in virtually every program
ubiquitousNames
= mkFVs [unpackCStringName, unpackCStringFoldrName,
unpackCStringUtf8Name, eqStringName]
- -- Virtually every program has error messages in it somewhere
-
- `plusFV`
+ -- Virtually every program has error messages in it somewhere
+ `plusFV`
mkFVs [getName unitTyCon, funTyConName, boolTyConName, intTyConName]
- -- Add occurrences for very frequently used types.
- -- (e.g. we don't want to be bothered with making funTyCon a
- -- free var at every function application!)
- `plusFV`
- namesNeededForFlattening
- -- this will be empty unless flattening is activated
-
-checkMain ghci_mode mod_name gbl_env
- -- LOOKUP main IF WE'RE IN MODULE Main
- -- The main point of this is to drag in the declaration for 'main',
- -- its in another module, and for the Prelude function 'runIO',
- -- so that the type checker will find them
- --
- -- We have to return the main_name separately, because it's a
- -- bona fide 'use', and should be recorded as such, but the others
- -- aren't
- | mod_name /= mAIN_Name
- = returnRn (Nothing, emptyFVs, emptyFVs)
-
- | not (main_RDR_Unqual `elemRdrEnv` gbl_env)
- = complain_no_main `thenRn_`
- returnRn (Nothing, emptyFVs, emptyFVs)
-
- | otherwise
- = lookupSrcName gbl_env main_RDR_Unqual `thenRn` \ main_name ->
- returnRn (Just main_name, unitFV main_name, unitFV runIOName)
-
- where
- complain_no_main | ghci_mode == Interactive = addWarnRn noMainMsg
- | otherwise = addErrRn noMainMsg
- -- In interactive mode, only warn about the absence of main
+ -- Add occurrences for very frequently used types.
+ -- (e.g. we don't want to be bothered with making
+ -- funTyCon a free var at every function application!)
\end{code}
%************************************************************************
\begin{code}
lookupSyntaxName :: Name -- The standard name
- -> RnMS (Name, FreeVars) -- Possibly a non-standard name
+ -> RnM (Name, FreeVars) -- Possibly a non-standard name
lookupSyntaxName std_name
- = getModeRn `thenRn` \ mode ->
- case mode of {
- InterfaceMode -> returnRn (std_name, unitFV std_name) ;
+ = getModeRn `thenM` \ mode ->
+ if isInterfaceMode mode then
+ returnM (std_name, unitFV std_name)
-- Happens for 'derived' code
-- where we don't want to rebind
- other ->
+ else
- doptRn Opt_NoImplicitPrelude `thenRn` \ no_prelude ->
+ doptM Opt_NoImplicitPrelude `thenM` \ no_prelude ->
if not no_prelude then
- returnRn (std_name, unitFV std_name) -- Normal case
+ returnM (std_name, unitFV std_name) -- Normal case
+
else
-- Get the similarly named thing from the local environment
- lookupOccRn (mkRdrUnqual (nameOccName std_name)) `thenRn` \ usr_name ->
- returnRn (usr_name, mkFVs [usr_name, std_name]) }
+ lookupOccRn (mkRdrUnqual (nameOccName std_name)) `thenM` \ usr_name ->
+ returnM (usr_name, mkFVs [usr_name, std_name])
\end{code}
\begin{code}
newLocalsRn :: [(RdrName,SrcLoc)]
- -> RnMS [Name]
+ -> RnM [Name]
newLocalsRn rdr_names_w_loc
- = getNameSupplyRn `thenRn` \ name_supply ->
+ = newUniqueSupply `thenM` \ us ->
let
- (us', us1) = splitUniqSupply (nsUniqs name_supply)
- uniqs = uniqsFromSupply us1
+ uniqs = uniqsFromSupply us
names = [ mkInternalName uniq (rdrNameOcc rdr_name) loc
| ((rdr_name,loc), uniq) <- rdr_names_w_loc `zip` uniqs
]
in
- setNameSupplyRn (name_supply {nsUniqs = us'}) `thenRn_`
- returnRn names
+ returnM names
bindLocatedLocalsRn :: SDoc -- Documentation string for error message
-> [(RdrName,SrcLoc)]
- -> ([Name] -> RnMS a)
- -> RnMS a
+ -> ([Name] -> RnM a)
+ -> RnM a
bindLocatedLocalsRn doc_str rdr_names_w_loc enclosed_scope
- = getModeRn `thenRn` \ mode ->
- getLocalNameEnv `thenRn` \ local_env ->
- getGlobalNameEnv `thenRn` \ global_env ->
+ = getModeRn `thenM` \ mode ->
+ getLocalRdrEnv `thenM` \ local_env ->
+ getGlobalRdrEnv `thenM` \ global_env ->
-- Check for duplicate names
- checkDupOrQualNames doc_str rdr_names_w_loc `thenRn_`
+ checkDupOrQualNames doc_str rdr_names_w_loc `thenM_`
-- Warn about shadowing, but only in source modules
let
check_shadow (rdr_name,loc)
| rdr_name `elemRdrEnv` local_env
|| rdr_name `elemRdrEnv` global_env
- = pushSrcLocRn loc $ addWarnRn (shadowedNameWarn rdr_name)
+ = addSrcLoc loc $ addWarn (shadowedNameWarn rdr_name)
| otherwise
- = returnRn ()
+ = returnM ()
in
(case mode of
- SourceMode -> ifOptRn Opt_WarnNameShadowing $
- mapRn_ check_shadow rdr_names_w_loc
- other -> returnRn ()
- ) `thenRn_`
+ SourceMode -> ifOptM Opt_WarnNameShadowing $
+ mappM_ check_shadow rdr_names_w_loc
+ other -> returnM ()
+ ) `thenM_`
- newLocalsRn rdr_names_w_loc `thenRn` \ names ->
+ newLocalsRn rdr_names_w_loc `thenM` \ names ->
let
new_local_env = addListToRdrEnv local_env (map fst rdr_names_w_loc `zip` names)
in
- setLocalNameEnv new_local_env (enclosed_scope names)
+ setLocalRdrEnv new_local_env (enclosed_scope names)
-bindCoreLocalRn :: RdrName -> (Name -> RnMS a) -> RnMS a
+bindCoreLocalRn :: RdrName -> (Name -> RnM a) -> RnM a
-- A specialised variant when renaming stuff from interface
-- files (of which there is a lot)
-- * one at a time
-- * always imported
-- * deal with free vars
bindCoreLocalRn rdr_name enclosed_scope
- = getSrcLocRn `thenRn` \ loc ->
- getLocalNameEnv `thenRn` \ name_env ->
- getNameSupplyRn `thenRn` \ name_supply ->
- let
- (us', us1) = splitUniqSupply (nsUniqs name_supply)
- uniq = uniqFromSupply us1
- name = mkInternalName uniq (rdrNameOcc rdr_name) loc
- in
- setNameSupplyRn (name_supply {nsUniqs = us'}) `thenRn_`
+ = getSrcLocM `thenM` \ loc ->
+ getLocalRdrEnv `thenM` \ name_env ->
+ newUnique `thenM` \ uniq ->
let
+ name = mkInternalName uniq (rdrNameOcc rdr_name) loc
new_name_env = extendRdrEnv name_env rdr_name name
in
- setLocalNameEnv new_name_env (enclosed_scope name)
+ setLocalRdrEnv new_name_env (enclosed_scope name)
bindCoreLocalsRn [] thing_inside = thing_inside []
bindCoreLocalsRn (b:bs) thing_inside = bindCoreLocalRn b $ \ name' ->
thing_inside (name':names')
bindLocalNames names enclosed_scope
- = getLocalNameEnv `thenRn` \ name_env ->
- setLocalNameEnv (extendLocalRdrEnv name_env names)
+ = getLocalRdrEnv `thenM` \ name_env ->
+ setLocalRdrEnv (extendLocalRdrEnv name_env names)
enclosed_scope
bindLocalNamesFV names enclosed_scope
= bindLocalNames names $
- enclosed_scope `thenRn` \ (thing, fvs) ->
- returnRn (thing, delListFromNameSet fvs names)
+ enclosed_scope `thenM` \ (thing, fvs) ->
+ returnM (thing, delListFromNameSet fvs names)
-------------------------------------
bindLocalRn doc rdr_name enclosed_scope
- = getSrcLocRn `thenRn` \ loc ->
+ = getSrcLocM `thenM` \ loc ->
bindLocatedLocalsRn doc [(rdr_name,loc)] $ \ (n:ns) ->
ASSERT( null ns )
enclosed_scope n
bindLocalsRn doc rdr_names enclosed_scope
- = getSrcLocRn `thenRn` \ loc ->
+ = getSrcLocM `thenM` \ loc ->
bindLocatedLocalsRn doc
(rdr_names `zip` repeat loc)
enclosed_scope
-- except that it deals with free vars
bindLocalsFVRn doc rdr_names enclosed_scope
= bindLocalsRn doc rdr_names $ \ names ->
- enclosed_scope names `thenRn` \ (thing, fvs) ->
- returnRn (thing, delListFromNameSet fvs names)
+ enclosed_scope names `thenM` \ (thing, fvs) ->
+ returnM (thing, delListFromNameSet fvs names)
-------------------------------------
-extendTyVarEnvFVRn :: [Name] -> RnMS (a, FreeVars) -> RnMS (a, FreeVars)
+extendTyVarEnvFVRn :: [Name] -> RnM (a, FreeVars) -> RnM (a, FreeVars)
-- This tiresome function is used only in rnSourceDecl on InstDecl
extendTyVarEnvFVRn tyvars enclosed_scope
- = bindLocalNames tyvars enclosed_scope `thenRn` \ (thing, fvs) ->
- returnRn (thing, delListFromNameSet fvs tyvars)
+ = bindLocalNames tyvars enclosed_scope `thenM` \ (thing, fvs) ->
+ returnM (thing, delListFromNameSet fvs tyvars)
bindTyVarsRn :: SDoc -> [HsTyVarBndr RdrName]
- -> ([HsTyVarBndr Name] -> RnMS a)
- -> RnMS a
+ -> ([HsTyVarBndr Name] -> RnM a)
+ -> RnM a
bindTyVarsRn doc_str tyvar_names enclosed_scope
- = getSrcLocRn `thenRn` \ loc ->
+ = getSrcLocM `thenM` \ loc ->
let
located_tyvars = [(hsTyVarName tv, loc) | tv <- tyvar_names]
in
enclosed_scope (zipWith replaceTyVarName tyvar_names names)
bindPatSigTyVars :: [RdrNameHsType]
- -> RnMS (a, FreeVars)
- -> RnMS (a, FreeVars)
+ -> RnM (a, FreeVars)
+ -> RnM (a, FreeVars)
-- Find the type variables in the pattern type
-- signatures that must be brought into scope
bindPatSigTyVars tys enclosed_scope
- = getLocalNameEnv `thenRn` \ name_env ->
- getSrcLocRn `thenRn` \ loc ->
+ = getLocalRdrEnv `thenM` \ name_env ->
+ getSrcLocM `thenM` \ loc ->
let
forall_tyvars = nub [ tv | ty <- tys,
tv <- extractHsTyRdrTyVars ty,
doc_sig = text "In a pattern type-signature"
in
bindLocatedLocalsRn doc_sig located_tyvars $ \ names ->
- enclosed_scope `thenRn` \ (thing, fvs) ->
- returnRn (thing, delListFromNameSet fvs names)
+ enclosed_scope `thenM` \ (thing, fvs) ->
+ returnM (thing, delListFromNameSet fvs names)
-------------------------------------
checkDupOrQualNames, checkDupNames :: SDoc
-> [(RdrName, SrcLoc)]
- -> RnM d ()
+ -> TcRn m ()
-- Works in any variant of the renamer monad
checkDupOrQualNames doc_str rdr_names_w_loc
= -- Check for use of qualified names
- mapRn_ (qualNameErr doc_str) quals `thenRn_`
+ mappM_ (qualNameErr doc_str) quals `thenM_`
checkDupNames doc_str rdr_names_w_loc
where
quals = filter (isQual . fst) rdr_names_w_loc
checkDupNames doc_str rdr_names_w_loc
= -- Check for duplicated names in a binding group
- mapRn_ (dupNamesErr doc_str) dups
+ mappM_ (dupNamesErr doc_str) dups
where
(_, dups) = removeDups (\(n1,l1) (n2,l2) -> n1 `compare` n2) rdr_names_w_loc
\end{code}
-- duplicates. So the simple thing is to do the fold.
add_avail :: GlobalRdrEnv -> AvailInfo -> GlobalRdrEnv
- add_avail env avail = foldl add_name env (availNames avail)
+ add_avail env avail = foldl (add_name (availName avail)) env (availNames avail)
- add_name env name -- Add qualified name only
- = addOneToGlobalRdrEnv env (mkRdrQual this_mod occ) elt
+ add_name parent env name -- Add qualified name only
+ = addOneToGlobalRdrEnv env (mkRdrQual this_mod occ) elt
where
occ = nameOccName name
- elt = GRE name (mk_provenance name) (lookupDeprec deprecs name)
+ elt = GRE {gre_name = name,
+ gre_parent = parent,
+ gre_prov = mk_provenance name,
+ gre_deprec = lookupDeprec deprecs name}
+
\end{code}
\begin{code}
choose n m | n `beats` m = n
| otherwise = m
- (GRE n pn _) `beats` (GRE m pm _) = n==m && pn `hasBetterProv` pm
+ g1 `beats` g2 = gre_name g1 == gre_name g2 &&
+ gre_prov g1 `hasBetterProv` gre_prov g2
is_duplicate :: GlobalRdrElt -> GlobalRdrElt -> Bool
- is_duplicate (GRE n1 LocalDef _) (GRE n2 LocalDef _) = False
- is_duplicate (GRE n1 _ _) (GRE n2 _ _) = n1 == n2
+ is_duplicate g1 g2 | isLocalGRE g1 && isLocalGRE g2 = False
+ is_duplicate g1 g2 = gre_name g1 == gre_name g2
\end{code}
We treat two bindings of a locally-defined name as a duplicate,
will still have different provenances.
-@unQualInScope@ returns a function that takes a @Name@ and tells whether
-its unqualified name is in scope. This is put as a boolean flag in
-the @Name@'s provenance to guide whether or not to print the name qualified
-in error messages.
-
-\begin{code}
-unQualInScope :: GlobalRdrEnv -> Name -> Bool
--- True if 'f' is in scope, and has only one binding,
--- and the thing it is bound to is the name we are looking for
--- (i.e. false if A.f and B.f are both in scope as unqualified 'f')
---
--- This fn is only efficient if the shared
--- partial application is used a lot.
-unQualInScope env
- = (`elemNameSet` unqual_names)
- where
- unqual_names :: NameSet
- unqual_names = foldRdrEnv add emptyNameSet env
- add rdr_name [GRE name _ _] unquals | isUnqual rdr_name = addOneToNameSet unquals name
- add _ _ unquals = unquals
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{Avails}
-%* *
-%************************************************************************
-
-\begin{code}
-plusAvail (Avail n1) (Avail n2) = Avail n1
-plusAvail (AvailTC n1 ns1) (AvailTC n2 ns2) = AvailTC n2 (nub (ns1 ++ ns2))
--- Added SOF 4/97
-#ifdef DEBUG
-plusAvail a1 a2 = pprPanic "RnEnv.plusAvail" (hsep [ppr a1,ppr a2])
-#endif
-
-addAvail :: AvailEnv -> AvailInfo -> AvailEnv
-addAvail avails avail = extendNameEnv_C plusAvail avails (availName avail) avail
-
-unitAvailEnv :: AvailInfo -> AvailEnv
-unitAvailEnv a = unitNameEnv (availName a) a
-
-plusAvailEnv :: AvailEnv -> AvailEnv -> AvailEnv
-plusAvailEnv = plusNameEnv_C plusAvail
-
-availEnvElts = nameEnvElts
-
-addAvailToNameSet :: NameSet -> AvailInfo -> NameSet
-addAvailToNameSet names avail = addListToNameSet names (availNames avail)
-
-availsToNameSet :: [AvailInfo] -> NameSet
-availsToNameSet avails = foldl addAvailToNameSet emptyNameSet avails
-
-availName :: GenAvailInfo name -> name
-availName (Avail n) = n
-availName (AvailTC n _) = n
-
-availNames :: GenAvailInfo name -> [name]
-availNames (Avail n) = [n]
-availNames (AvailTC n ns) = ns
-
--------------------------------------
-filterAvail :: RdrNameIE -- Wanted
- -> AvailInfo -- Available
- -> Maybe AvailInfo -- Resulting available;
- -- Nothing if (any of the) wanted stuff isn't there
-
-filterAvail ie@(IEThingWith want wants) avail@(AvailTC n ns)
- | sub_names_ok = Just (AvailTC n (filter is_wanted ns))
- | otherwise = Nothing
- where
- is_wanted name = nameOccName name `elem` wanted_occs
- sub_names_ok = all (`elem` avail_occs) wanted_occs
- avail_occs = map nameOccName ns
- wanted_occs = map rdrNameOcc (want:wants)
-
-filterAvail (IEThingAbs _) (AvailTC n ns) = ASSERT( n `elem` ns )
- Just (AvailTC n [n])
-
-filterAvail (IEThingAbs _) avail@(Avail n) = Just avail -- Type synonyms
-
-filterAvail (IEVar _) avail@(Avail n) = Just avail
-filterAvail (IEVar v) avail@(AvailTC n ns) = Just (AvailTC n (filter wanted ns))
- where
- wanted n = nameOccName n == occ
- occ = rdrNameOcc v
- -- The second equation happens if we import a class op, thus
- -- import A( op )
- -- where op is a class operation
-
-filterAvail (IEThingAll _) avail@(AvailTC _ _) = Just avail
- -- We don't complain even if the IE says T(..), but
- -- no constrs/class ops of T are available
- -- Instead that's caught with a warning by the caller
-
-filterAvail ie avail = Nothing
-
--------------------------------------
-groupAvails :: Module -> Avails -> [(ModuleName, Avails)]
- -- Group by module and sort by occurrence
- -- This keeps the list in canonical order
-groupAvails this_mod avails
- = [ (mkSysModuleNameFS fs, sortLt lt avails)
- | (fs,avails) <- fmToList groupFM
- ]
- where
- groupFM :: FiniteMap FastString Avails
- -- Deliberately use the FastString so we
- -- get a canonical ordering
- groupFM = foldl add emptyFM avails
-
- add env avail = addToFM_C combine env mod_fs [avail']
- where
- mod_fs = moduleNameFS (moduleName avail_mod)
- avail_mod = case nameModule_maybe (availName avail) of
- Just m -> m
- Nothing -> this_mod
- combine old _ = avail':old
- avail' = sortAvail avail
-
- a1 `lt` a2 = occ1 < occ2
- where
- occ1 = nameOccName (availName a1)
- occ2 = nameOccName (availName a2)
-
-sortAvail :: AvailInfo -> AvailInfo
--- Sort the sub-names into canonical order.
--- The canonical order has the "main name" at the beginning
--- (if it's there at all)
-sortAvail (Avail n) = Avail n
-sortAvail (AvailTC n ns) | n `elem` ns = AvailTC n (n : sortLt lt (filter (/= n) ns))
- | otherwise = AvailTC n ( sortLt lt ns)
- where
- n1 `lt` n2 = nameOccName n1 < nameOccName n2
-\end{code}
-
-\begin{code}
-pruneAvails :: (Name -> Bool) -- Keep if this is True
- -> [AvailInfo]
- -> [AvailInfo]
-pruneAvails keep avails
- = mapMaybe del avails
- where
- del :: AvailInfo -> Maybe AvailInfo -- Nothing => nothing left!
- del (Avail n) | keep n = Just (Avail n)
- | otherwise = Nothing
- del (AvailTC n ns) | null ns' = Nothing
- | otherwise = Just (AvailTC n ns')
- where
- ns' = filter keep ns
-\end{code}
-
%************************************************************************
%* *
\subsection{Free variable manipulation}
\begin{code}
-- A useful utility
-mapFvRn f xs = mapRn f xs `thenRn` \ stuff ->
+mapFvRn f xs = mappM f xs `thenM` \ stuff ->
let
(ys, fvs_s) = unzip stuff
in
- returnRn (ys, plusFVs fvs_s)
+ returnM (ys, plusFVs fvs_s)
\end{code}
%************************************************************************
\begin{code}
-warnUnusedModules :: [ModuleName] -> RnM d ()
+warnUnusedModules :: [ModuleName] -> TcRn m ()
warnUnusedModules mods
- = ifOptRn Opt_WarnUnusedImports (mapRn_ (addWarnRn . unused_mod) mods)
+ = ifOptM Opt_WarnUnusedImports (mappM_ (addWarn . unused_mod) mods)
where
unused_mod m = vcat [ptext SLIT("Module") <+> quotes (ppr m) <+>
text "is imported, but nothing from it is used",
- parens (ptext SLIT("except perhaps to re-export instances visible in") <+>
+ parens (ptext SLIT("except perhaps instances visible in") <+>
quotes (ppr m))]
-warnUnusedImports :: [(Name,Provenance)] -> RnM d ()
-warnUnusedImports names
- = ifOptRn Opt_WarnUnusedImports (warnUnusedBinds names)
+warnUnusedImports, warnUnusedTopBinds :: [GlobalRdrElt] -> TcRn m ()
+warnUnusedImports gres = ifOptM Opt_WarnUnusedImports (warnUnusedGREs gres)
+warnUnusedTopBinds gres = ifOptM Opt_WarnUnusedBinds (warnUnusedGREs gres)
-warnUnusedLocalBinds, warnUnusedMatches :: [Name] -> RnM d ()
-warnUnusedLocalBinds names
- = ifOptRn Opt_WarnUnusedBinds (warnUnusedBinds [(n,LocalDef) | n<-names])
-
-warnUnusedMatches names
- = ifOptRn Opt_WarnUnusedMatches (warnUnusedGroup [(n,LocalDef) | n<-names])
+warnUnusedLocalBinds, warnUnusedMatches :: [Name] -> TcRn m ()
+warnUnusedLocalBinds names = ifOptM Opt_WarnUnusedBinds (warnUnusedLocals names)
+warnUnusedMatches names = ifOptM Opt_WarnUnusedMatches (warnUnusedLocals names)
-------------------------
+-- Helpers
+warnUnusedGREs gres = warnUnusedBinds [(n,p) | GRE {gre_name = n, gre_prov = p} <- gres]
+warnUnusedLocals names = warnUnusedBinds [(n,LocalDef) | n<-names]
-warnUnusedBinds :: [(Name,Provenance)] -> RnM d ()
+warnUnusedBinds :: [(Name,Provenance)] -> TcRn m ()
warnUnusedBinds names
- = mapRn_ warnUnusedGroup groups
+ = mappM_ warnUnusedGroup groups
where
-- Group by provenance
groups = equivClasses cmp names
-------------------------
-warnUnusedGroup :: [(Name,Provenance)] -> RnM d ()
+warnUnusedGroup :: [(Name,Provenance)] -> TcRn m ()
warnUnusedGroup names
- | null filtered_names = returnRn ()
- | not is_local = returnRn ()
+ | null filtered_names = returnM ()
+ | not is_local = returnM ()
| otherwise
- = pushSrcLocRn def_loc $
- addWarnRn $
+ = addSrcLoc def_loc $
+ addWarn $
sep [msg <> colon, nest 4 (fsep (punctuate comma (map (ppr.fst) filtered_names)))]
where
filtered_names = filter reportable names
\begin{code}
addNameClashErrRn rdr_name (np1:nps)
- = addErrRn (vcat [ptext SLIT("Ambiguous occurrence") <+> quotes (ppr rdr_name),
+ = addErr (vcat [ptext SLIT("Ambiguous occurrence") <+> quotes (ppr rdr_name),
ptext SLIT("It could refer to") <+> vcat (msg1 : msgs)])
where
msg1 = ptext SLIT("either") <+> mk_ref np1
msgs = [ptext SLIT(" or") <+> mk_ref np | np <- nps]
- mk_ref (GRE name prov _) = quotes (ppr name) <> comma <+> pprNameProvenance name prov
+ mk_ref gre = quotes (ppr (gre_name gre)) <> comma <+> pprNameProvenance gre
shadowedNameWarn shadow
= hsep [ptext SLIT("This binding for"),
quotes (ppr shadow),
ptext SLIT("shadows an existing binding")]
-noMainMsg = ptext SLIT("No 'main' defined in module Main")
-
unknownNameErr name
= sep [text flavour, ptext SLIT("not in scope:"), quotes (ppr name)]
where
-- The rdrNameOcc is because we don't want to print Prelude.(,)
qualNameErr descriptor (name,loc)
- = pushSrcLocRn loc $
- addErrRn (vcat [ ptext SLIT("Invalid use of qualified name") <+> quotes (ppr name),
+ = addSrcLoc loc $
+ addErr (vcat [ ptext SLIT("Invalid use of qualified name") <+> quotes (ppr name),
descriptor])
dupNamesErr descriptor ((name,loc) : dup_things)
- = pushSrcLocRn loc $
- addErrRn ((ptext SLIT("Conflicting definitions for") <+> quotes (ppr name))
+ = addSrcLoc loc $
+ addErr ((ptext SLIT("Conflicting definitions for") <+> quotes (ppr name))
$$
descriptor)
-warnDeprec :: Name -> DeprecTxt -> RnM d ()
-warnDeprec name txt
- = ifOptRn Opt_WarnDeprecations $
- addWarnRn (sep [ text (occNameFlavour (nameOccName name)) <+>
+warnDeprec :: GlobalRdrElt -> TcRn m ()
+warnDeprec (GRE {gre_name = name, gre_deprec = Just txt})
+ = ifOptM Opt_WarnDeprecations $
+ addWarn (sep [ text (occNameFlavour (nameOccName name)) <+>
quotes (ppr name) <+> text "is deprecated:",
nest 4 (ppr txt) ])
-
-dupFixityDecl rdr_name loc1 loc2
- = vcat [ptext SLIT("Multiple fixity declarations for") <+> quotes (ppr rdr_name),
- ptext SLIT("at ") <+> ppr loc1,
- ptext SLIT("and") <+> ppr loc2]
\end{code}
projects / ghc-hetmet.git / blobdiff