import HsSyn
import RdrHsSyn ( RdrNameIE )
import RdrName ( RdrName, rdrNameModule, rdrNameOcc, isQual, isUnqual, isOrig,
- mkRdrUnqual, mkRdrUnqual, qualifyRdrName, lookupRdrEnv
+ mkRdrUnqual, mkRdrQual, qualifyRdrName, lookupRdrEnv, foldRdrEnv
)
import HsTypes ( hsTyVarName, replaceTyVarName )
import HscTypes ( Provenance(..), pprNameProvenance, hasBetterProv,
import RnMonad
import Name ( Name, NamedThing(..),
getSrcLoc,
- mkLocalName, mkImportedLocalName, mkGlobalName,
+ mkLocalName, mkGlobalName,
mkIPName, nameOccName, nameModule_maybe,
setNameModuleAndLoc
)
\fbox{{\em Jan 98: this comment is wrong: @rnHsType@ uses it quite a bit.}}
-For List and Tuple types it's important to get the correct
-@isLocallyDefined@ flag, which is used in turn when deciding
-whether there are any instance decls in this module are ``special''.
-The name cache should have the correct provenance, though.
\begin{code}
lookupOrigNames :: [RdrName] -> RnM d NameSet
let
(us', us1) = splitUniqSupply us
uniq = uniqFromSupply us1
- name = mkImportedLocalName uniq (rdrNameOcc rdr_name) loc
+ name = mkLocalName uniq (rdrNameOcc rdr_name) loc
in
setNameSupplyRn (us', cache, ipcache) `thenRn_`
let
where
pairs = [(mkRdrUnqual (nameOccName n), n) | n <- names]
+bindLocalNamesFV names enclosed_scope
+ = bindLocalNames names $
+ enclosed_scope `thenRn` \ (thing, fvs) ->
+ returnRn (thing, delListFromNameSet fvs names)
+
+
-------------------------------------
bindLocalRn doc rdr_name enclosed_scope
= getSrcLocRn `thenRn` \ loc ->
returnRn (thing, delListFromNameSet fvs names)
-------------------------------------
-bindUVarRn :: RdrName -> (Name -> RnMS a) -> RnMS a
-bindUVarRn = bindCoreLocalRn
-
--------------------------------------
extendTyVarEnvFVRn :: [Name] -> RnMS (a, FreeVars) -> RnMS (a, FreeVars)
-- This tiresome function is used only in rnDecl on InstDecl
extendTyVarEnvFVRn tyvars enclosed_scope
%************************************************************************
\begin{code}
+mkGlobalRdrEnv :: ModuleName -- Imported module (after doing the "as M" name change)
+ -> Bool -- True <=> want unqualified import
+ -> [AvailInfo] -- What's to be hidden (but only the unqualified
+ -- version is hidden)
+ -> (Name -> Provenance)
+ -> Avails -- Whats imported and how
+ -> GlobalRdrEnv
+
+mkGlobalRdrEnv this_mod unqual_imp hides mk_provenance avails
+ = gbl_env2
+ where
+ -- Make the name environment. We're talking about a
+ -- single module here, so there must be no name clashes.
+ -- In practice there only ever will be if it's the module
+ -- being compiled.
+
+ -- Add the things that are available
+ gbl_env1 = foldl add_avail emptyRdrEnv avails
+
+ -- Delete things that are hidden
+ gbl_env2 = foldl del_avail gbl_env1 hides
+
+ add_avail :: GlobalRdrEnv -> AvailInfo -> GlobalRdrEnv
+ add_avail env avail = foldl add_name env (availNames avail)
+
+ add_name env name
+ | unqual_imp = env2
+ | otherwise = env1
+ where
+ env1 = addOneToGlobalRdrEnv env (mkRdrQual this_mod occ) (name,prov)
+ env2 = addOneToGlobalRdrEnv env1 (mkRdrUnqual occ) (name,prov)
+ occ = nameOccName name
+ prov = mk_provenance name
+
+ del_avail env avail = foldl delOneFromGlobalRdrEnv env rdr_names
+ where
+ rdr_names = map (mkRdrUnqual . nameOccName) (availNames avail)
+
+mkIfaceGlobalRdrEnv :: [(ModuleName,Avails)] -> GlobalRdrEnv
+-- Used to construct a GlobalRdrEnv for an interface that we've
+-- read from a .hi file. We can't construct the original top-level
+-- environment because we don't have enough info, but we compromise
+-- by making an environment from its exports
+mkIfaceGlobalRdrEnv m_avails
+ = foldl add emptyRdrEnv m_avails
+ where
+ add env (mod,avails) = plusGlobalRdrEnv env (mkGlobalRdrEnv mod True [] (\n -> LocalDef) avails)
+\end{code}
+
+\begin{code}
plusGlobalRdrEnv :: GlobalRdrEnv -> GlobalRdrEnv -> GlobalRdrEnv
plusGlobalRdrEnv env1 env2 = plusFM_C combine_globals env1 env2
\begin{code}
unQualInScope :: GlobalRdrEnv -> Name -> Bool
unQualInScope env
- = lookup
+ = (`elemNameSet` unqual_names)
where
- lookup name = case lookupRdrEnv env (mkRdrUnqual (nameOccName name)) of
- Just [(name',_)] -> name == name'
- other -> False
+ unqual_names :: NameSet
+ unqual_names = foldRdrEnv add emptyNameSet env
+ add rdr_name [(name,_)] unquals | isUnqual rdr_name = addOneToNameSet unquals name
+ add _ _ unquals = unquals
\end{code}
availNames (AvailTC n ns) = ns
-------------------------------------
-addSysAvails :: AvailInfo -> [Name] -> AvailInfo
-addSysAvails avail [] = avail
-addSysAvails (AvailTC n ns) sys = AvailTC n (sys ++ ns)
-
--------------------------------------
filterAvail :: RdrNameIE -- Wanted
-> AvailInfo -- Available
-> Maybe AvailInfo -- Resulting available;
= case prov1 of
LocalDef -> (True, getSrcLoc name1, text "Defined but not used")
- NonLocalDef (UserImport mod loc _) _
+ NonLocalDef (UserImport mod loc _)
-> (True, loc, text "Imported from" <+> quotes (ppr mod) <+> text "but not used")
reportable (name,_) = case occNameUserString (nameOccName name) of
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