mkDerivedRdrName,
-- Destruction
- rdrNameModule, rdrNameOcc, setRdrNameSpace,
- isRdrDataCon, isRdrTyVar, isRdrTc, isQual, isUnqual,
+ rdrNameOcc, setRdrNameSpace,
+ isRdrDataCon, isRdrTyVar, isRdrTc, isQual, isQual_maybe, isUnqual,
isOrig, isOrig_maybe, isExact, isExact_maybe, isSrcRdrName,
-- Printing; instance Outputable RdrName
GlobalRdrEnv, emptyGlobalRdrEnv, mkGlobalRdrEnv, plusGlobalRdrEnv,
lookupGlobalRdrEnv, extendGlobalRdrEnv,
pprGlobalRdrEnv, globalRdrEnvElts,
- lookupGRE_RdrName, lookupGRE_Name,
+ lookupGRE_RdrName, lookupGRE_Name, hideSomeUnquals,
-- GlobalRdrElt, Provenance, ImportSpec
GlobalRdrElt(..), isLocalGRE, unQualOK,
#include "HsVersions.h"
import OccName
-import Module ( Module, mkModuleFS )
-import Name ( Name, NamedThing(getName), nameModule, nameParent_maybe,
+import Module ( ModuleName, mkModuleNameFS, Module, moduleName )
+import Name ( Name, NamedThing(getName), nameModule,
nameOccName, isExternalName, nameSrcLoc )
import Maybes ( mapCatMaybes )
-import SrcLoc ( isGoodSrcLoc, SrcSpan )
+import SrcLoc ( isGoodSrcLoc, isGoodSrcSpan, srcLocSpan, SrcSpan )
import FastString ( FastString )
import Outputable
import Util ( thenCmp )
= Unqual OccName
-- Used for ordinary, unqualified occurrences
- | Qual Module OccName
+ | Qual ModuleName OccName
-- A qualified name written by the user in
-- *source* code. The module isn't necessarily
-- the module where the thing is defined;
-- We know exactly the Name. This is used
-- (a) when the parser parses built-in syntax like "[]"
-- and "(,)", but wants a RdrName from it
- -- (b) when converting names to the RdrNames in IfaceTypes
- -- Here an Exact RdrName always contains an External Name
- -- (Internal Names are converted to simple Unquals)
- -- (c) by Template Haskell, when TH has generated a unique name
+ -- (b) by Template Haskell, when TH has generated a unique name
\end{code}
%************************************************************************
\begin{code}
-rdrNameModule :: RdrName -> Module
-rdrNameModule (Qual m _) = m
-rdrNameModule (Orig m _) = m
-rdrNameModule (Exact n) = nameModule n
-rdrNameModule (Unqual n) = pprPanic "rdrNameModule" (ppr n)
-
rdrNameOcc :: RdrName -> OccName
rdrNameOcc (Qual _ occ) = occ
rdrNameOcc (Unqual occ) = occ
mkRdrUnqual :: OccName -> RdrName
mkRdrUnqual occ = Unqual occ
-mkRdrQual :: Module -> OccName -> RdrName
+mkRdrQual :: ModuleName -> OccName -> RdrName
mkRdrQual mod occ = Qual mod occ
mkOrig :: Module -> OccName -> RdrName
mkVarUnqual n = Unqual (mkVarOccFS n)
mkQual :: NameSpace -> (FastString, FastString) -> RdrName
-mkQual sp (m, n) = Qual (mkModuleFS m) (mkOccNameFS sp n)
+mkQual sp (m, n) = Qual (mkModuleNameFS m) (mkOccNameFS sp n)
getRdrName :: NamedThing thing => thing -> RdrName
getRdrName name = nameRdrName (getName name)
isQual (Qual _ _) = True
isQual _ = False
+isQual_maybe (Qual m n) = Just (m,n)
+isQual_maybe _ = Nothing
+
isOrig (Orig _ _) = True
isOrig _ = False
}
instance Outputable GlobalRdrElt where
- ppr gre = ppr name <+> pp_parent (nameParent_maybe name)
- <+> parens (pprNameProvenance gre)
+ ppr gre = ppr name <+> parens (pprNameProvenance gre)
where
name = gre_name gre
pp_parent (Just p) = brackets (text "parent:" <+> ppr p)
pickGREs rdr_name gres
= mapCatMaybes pick gres
where
- is_unqual = isUnqual rdr_name
- mod = rdrNameModule rdr_name
+ rdr_is_unqual = isUnqual rdr_name
+ rdr_is_qual = isQual_maybe rdr_name
pick :: GlobalRdrElt -> Maybe GlobalRdrElt
pick gre@(GRE {gre_prov = LocalDef, gre_name = n}) -- Local def
- | is_unqual || nameModule n == mod = Just gre
- | otherwise = Nothing
+ | rdr_is_unqual = Just gre
+ | Just (mod,_) <- rdr_is_qual,
+ mod == moduleName (nameModule n) = Just gre
+ | otherwise = Nothing
pick gre@(GRE {gre_prov = Imported [is]}) -- Single import (efficiency)
- | is_unqual = if not (is_qual (is_decl is)) then Just gre
- else Nothing
- | otherwise = if mod == is_as (is_decl is) then Just gre
- else Nothing
+ | rdr_is_unqual,
+ not (is_qual (is_decl is)) = Just gre
+ | Just (mod,_) <- rdr_is_qual,
+ mod == is_as (is_decl is) = Just gre
+ | otherwise = Nothing
pick gre@(GRE {gre_prov = Imported is}) -- Multiple import
| null filtered_is = Nothing
| otherwise = Just (gre {gre_prov = Imported filtered_is})
where
- filtered_is | is_unqual = filter (not . is_qual . is_decl) is
- | otherwise = filter ((== mod) . is_as . is_decl) is
+ filtered_is | rdr_is_unqual
+ = filter (not . is_qual . is_decl) is
+ | Just (mod,_) <- rdr_is_qual
+ = filter ((== mod) . is_as . is_decl) is
+ | otherwise
+ = []
isLocalGRE :: GlobalRdrElt -> Bool
isLocalGRE (GRE {gre_prov = LocalDef}) = True
plusGRE g1 g2
= GRE { gre_name = gre_name g1,
gre_prov = gre_prov g1 `plusProv` gre_prov g2 }
+
+hideSomeUnquals :: GlobalRdrEnv -> [OccName] -> GlobalRdrEnv
+-- Hide any unqualified bindings for the specified OccNames
+-- This is used in TH, when renaming a declaration bracket
+-- [d| foo = ... |]
+-- We want unqualified 'foo' in "..." to mean this foo, not
+-- the one from the enclosing module. But the *qualified* name
+-- from the enclosing moudule must certainly still be avaialable
+-- Seems like 5 times as much work as it deserves!
+hideSomeUnquals rdr_env occs
+ = foldr hide rdr_env occs
+ where
+ hide occ env
+ | Just gres <- lookupOccEnv env occ = extendOccEnv env occ (map qual_gre gres)
+ | otherwise = env
+ qual_gre gre@(GRE { gre_name = name, gre_prov = LocalDef })
+ = GRE { gre_name = name, gre_prov = Imported [imp_spec] }
+ where -- Local defs get transfomed to (fake) imported things
+ mod = moduleName (nameModule name)
+ imp_spec = ImpSpec { is_item = ImpAll, is_decl = decl_spec }
+ decl_spec = ImpDeclSpec { is_mod = mod, is_as = mod,
+ is_qual = True,
+ is_dloc = srcLocSpan (nameSrcLoc name) }
+
+ qual_gre gre@(GRE { gre_prov = Imported specs })
+ = gre { gre_prov = Imported (map qual_spec specs) }
+
+ qual_spec spec@(ImpSpec { is_decl = decl_spec })
+ = spec { is_decl = decl_spec { is_qual = True } }
\end{code}
data ImpDeclSpec -- Describes a particular import declaration
-- Shared among all the Provenaces for that decl
= ImpDeclSpec {
- is_mod :: Module, -- 'import Muggle'
+ is_mod :: ModuleName, -- 'import Muggle'
-- Note the Muggle may well not be
-- the defining module for this thing!
- is_as :: Module, -- 'as M' (or 'Muggle' if there is no 'as' clause)
+ -- TODO: either should be Module, or there
+ -- should be a Maybe PackageId here too.
+ is_as :: ModuleName, -- 'as M' (or 'Muggle' if there is no 'as' clause)
is_qual :: Bool, -- True <=> qualified (only)
is_dloc :: SrcSpan -- Location of import declaration
}
importSpecLoc (ImpSpec decl ImpAll) = is_dloc decl
importSpecLoc (ImpSpec _ item) = is_iloc item
-importSpecModule :: ImportSpec -> Module
+importSpecModule :: ImportSpec -> ModuleName
importSpecModule is = is_mod (is_decl is)
-- Note [Comparing provenance]
-- Print out the place where the name was imported
pprNameProvenance (GRE {gre_name = name, gre_prov = LocalDef})
= ptext SLIT("defined at") <+> ppr (nameSrcLoc name)
-pprNameProvenance (GRE {gre_name = name, gre_prov = Imported (why:whys)})
- = sep [ppr why, nest 2 (ppr_defn (nameSrcLoc name))]
+pprNameProvenance (GRE {gre_name = name, gre_prov = Imported whys})
+ = case whys of
+ (why:whys) -> sep [ppr why, nest 2 (ppr_defn (nameSrcLoc name))]
+ [] -> panic "pprNameProvenance"
-- If we know the exact definition point (which we may do with GHCi)
-- then show that too. But not if it's just "imported from X".
| otherwise = empty
instance Outputable ImportSpec where
- ppr imp_spec@(ImpSpec imp_decl _)
- = ptext SLIT("imported from") <+> ppr (is_mod imp_decl)
- <+> ptext SLIT("at") <+> ppr (importSpecLoc imp_spec)
+ ppr imp_spec
+ = ptext SLIT("imported from") <+> ppr (importSpecModule imp_spec)
+ <+> if isGoodSrcSpan loc then ptext SLIT("at") <+> ppr loc
+ else empty
+ where
+ loc = importSpecLoc imp_spec
\end{code}
projects / ghc-hetmet.git / blobdiff