%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[Name]{@Name@: to transmit name info from renamer to typechecker}
\begin{code}
-#include "HsVersions.h"
-
module Name (
- -- The Module type
- SYN_IE(Module),
- pprModule, moduleString,
-
- -- The OccName type
- OccName(..),
- pprOccName, occNameString, occNameFlavour,
- isTvOcc, isTCOcc, isVarOcc, prefixOccName,
- quoteInText, parenInCode,
+ -- Re-export the OccName stuff
+ module OccName,
-- The Name type
Name, -- Abstract
- mkLocalName, mkSysLocalName,
-
- mkCompoundName, mkGlobalName, mkInstDeclName,
-
+ mkLocalName, mkSysLocalName, mkTopName,
+ mkDerivedName, mkGlobalName,
mkWiredInIdName, mkWiredInTyConName,
maybeWiredInIdName, maybeWiredInTyConName,
isWiredInName,
- nameUnique, changeUnique, setNameProvenance, getNameProvenance,
- setNameVisibility,
- nameOccName, nameString, nameModule,
+ nameUnique, setNameUnique, setNameProvenance, getNameProvenance, setNameImportReason,
+ tidyTopName,
+ nameOccName, nameModule, setNameOcc, nameRdrName, setNameModule,
isExportedName, nameSrcLoc,
isLocallyDefinedName,
- isLocalName,
-
- pprNameProvenance,
+ isSystemName, isLocalName, isGlobalName, isExternallyVisibleName,
- -- Sets of Names
- SYN_IE(NameSet),
- emptyNameSet, unitNameSet, mkNameSet, unionNameSets, unionManyNameSets,
- minusNameSet, elemNameSet, nameSetToList, addListToNameSet, isEmptyNameSet,
- -- Misc
- DefnInfo(..),
- Provenance(..), pprProvenance,
- ExportFlag(..),
+ -- Provenance
+ Provenance(..), ImportReason(..), pprProvenance,
+ ExportFlag(..), PrintUnqualified,
+ pprNameProvenance, systemProvenance,
-- Class NamedThing and overloaded friends
NamedThing(..),
- modAndOcc, isExported,
+ isExported,
getSrcLoc, isLocallyDefined, getOccString
) where
-IMP_Ubiq()
-import TyLoop --( GenId, Id(..), TyCon ) -- Used inside Names
-import CStrings ( identToC, modnameToC, cSEP )
-import CmdLineOpts ( opt_OmitInterfacePragmas, opt_EnsureSplittableC )
-
-import Outputable ( Outputable(..) )
-import PprStyle ( PprStyle(..), codeStyle, ifaceStyle )
-import PrelMods ( gHC__ )
-import Pretty
-import Lex ( isLexSym, isLexConId )
-import SrcLoc ( noSrcLoc, SrcLoc )
-import Usage ( SYN_IE(UVar), SYN_IE(Usage) )
-import Unique ( pprUnique, showUnique, Unique )
-import UniqSet ( UniqSet(..), emptyUniqSet, unitUniqSet, unionUniqSets, uniqSetToList, isEmptyUniqSet,
- unionManyUniqSets, minusUniqSet, mkUniqSet, elementOfUniqSet, addListToUniqSet )
-import UniqFM ( UniqFM, SYN_IE(Uniquable) )
-import Util --( cmpPString, panic, assertPanic {-, pprTrace ToDo:rm-} )
+#include "HsVersions.h"
+
+import {-# SOURCE #-} Var ( Id, setIdName )
+import {-# SOURCE #-} TyCon ( TyCon, setTyConName )
+
+import OccName -- All of it
+import Module
+import RdrName ( RdrName, mkRdrQual, mkRdrUnqual )
+import CmdLineOpts ( opt_PprStyle_NoPrags, opt_OmitInterfacePragmas, opt_EnsureSplittableC )
+import SrcLoc ( noSrcLoc, mkBuiltinSrcLoc, SrcLoc )
+import Unique ( pprUnique, Unique, Uniquable(..) )
+import Outputable
+import GlaExts
\end{code}
%************************************************************************
%* *
-\subsection[Name-pieces-datatypes]{The @Module@, @OccName@ datatypes}
+\subsection[Name-datatype]{The @Name@ datatype, and name construction}
%* *
%************************************************************************
-
+
\begin{code}
-type Module = FAST_STRING
+data Name = Name {
+ n_sort :: NameSort, -- What sort of name it is
+ n_uniq :: Unique,
+ n_occ :: OccName, -- Its occurrence name
+ n_prov :: Provenance -- How it was made
+ }
+
+data NameSort
+ = Local
+ | Global Module
+ | WiredInId Module Id
+ | WiredInTyCon Module TyCon
+\end{code}
-data OccName = VarOcc FAST_STRING -- Variables and data constructors
- | TvOcc FAST_STRING -- Type variables
- | TCOcc FAST_STRING -- Type constructors and classes
+Things with a @Global@ name are given C static labels, so they finally
+appear in the .o file's symbol table. They appear in the symbol table
+in the form M.n. If originally-local things have this property they
+must be made @Global@ first.
-moduleString :: Module -> String
-moduleString mod = _UNPK_ mod
+\begin{code}
+mkLocalName :: Unique -> OccName -> SrcLoc -> Name
+mkLocalName uniq occ loc = Name { n_uniq = uniq, n_sort = Local, n_occ = occ,
+ n_prov = LocalDef loc NotExported }
+ -- NB: You might worry that after lots of huffing and
+ -- puffing we might end up with two local names with distinct
+ -- uniques, but the same OccName. Indeed we can, but that's ok
+ -- * the insides of the compiler don't care: they use the Unique
+ -- * when printing for -ddump-xxx you can switch on -dppr-debug to get the
+ -- uniques if you get confused
+ -- * for interface files we tidyCore first, which puts the uniques
+ -- into the print name (see setNameVisibility below)
+
+mkGlobalName :: Unique -> Module -> OccName -> Provenance -> Name
+mkGlobalName uniq mod occ prov = Name { n_uniq = uniq, n_sort = Global mod,
+ n_occ = occ, n_prov = prov }
+
+
+mkSysLocalName :: Unique -> FAST_STRING -> Name
+mkSysLocalName uniq fs = Name { n_uniq = uniq, n_sort = Local,
+ n_occ = mkSrcVarOcc fs, n_prov = SystemProv }
+
+mkTopName :: Unique -> Module -> FAST_STRING -> Name
+ -- Make a top-level name; make it Global if top-level
+ -- things should be externally visible; Local otherwise
+ -- This chap is only used *after* the tidyCore phase
+ -- Notably, it is used during STG lambda lifting
+ --
+ -- We have to make sure that the name is globally unique
+ -- and we don't have tidyCore to help us. So we append
+ -- the unique. Hack! Hack!
+mkTopName uniq mod fs
+ = Name { n_uniq = uniq,
+ n_sort = mk_top_sort mod,
+ n_occ = mkSrcVarOcc (_PK_ ((_UNPK_ fs) ++ show uniq)),
+ n_prov = LocalDef noSrcLoc NotExported }
+
+------------------------- Wired in names -------------------------
+
+mkWiredInIdName :: Unique -> Module -> OccName -> Id -> Name
+mkWiredInIdName uniq mod occ id = Name { n_uniq = uniq, n_sort = WiredInId mod id,
+ n_occ = occ, n_prov = SystemProv }
+
+-- mkWiredInTyConName takes a FAST_STRING instead of
+-- an OccName, which is a bit yukky but that's what the
+-- clients find easiest.
+mkWiredInTyConName :: Unique -> Module -> FAST_STRING -> TyCon -> Name
+mkWiredInTyConName uniq mod fs tycon
+ = Name { n_uniq = uniq, n_sort = WiredInTyCon mod tycon,
+ n_occ = mkSrcOccFS tcName fs, n_prov = SystemProv }
-pprModule :: PprStyle -> Module -> Doc
-pprModule sty m = ptext m
-pprOccName :: PprStyle -> OccName -> Doc
-pprOccName sty n = if codeStyle sty
- then identToC (occNameString n)
- else ptext (occNameString n)
+---------------------------------------------------------------------
+mkDerivedName :: (OccName -> OccName)
+ -> Name -- Base name
+ -> Unique -- New unique
+ -> Name -- Result is always a value name
-occNameString :: OccName -> FAST_STRING
-occNameString (VarOcc s) = s
-occNameString (TvOcc s) = s
-occNameString (TCOcc s) = s
+mkDerivedName f name uniq = name {n_uniq = uniq, n_occ = f (n_occ name)}
-prefixOccName :: FAST_STRING -> OccName -> OccName
-prefixOccName prefix (VarOcc s) = VarOcc (prefix _APPEND_ s)
-prefixOccName prefix (TvOcc s) = TvOcc (prefix _APPEND_ s)
-prefixOccName prefix (TCOcc s) = TCOcc (prefix _APPEND_ s)
+-- When we renumber/rename things, we need to be
+-- able to change a Name's Unique to match the cached
+-- one in the thing it's the name of. If you know what I mean.
+setNameUnique name uniq = name {n_uniq = uniq}
+
+setNameOcc :: Name -> OccName -> Name
+ -- Give the thing a new OccName, *and*
+ -- record that it's no longer a sys-local
+ -- This is used by the tidy-up pass
+setNameOcc name occ = name {n_occ = occ}
+
+setNameModule :: Name -> Module -> Name
+setNameModule name mod = name {n_sort = set (n_sort name)}
+ where
+ set (Global _) = Global mod
+ set (WiredInId _ id) = WiredInId mod id
+ set (WiredInTyCon _ tycon) = WiredInTyCon mod tycon
+\end{code}
--- occNameFlavour is used only to generate good error messages, so it doesn't matter
--- that the VarOcc case isn't mega-efficient. We could have different Occ constructors for
--- data constructors and values, but that makes everything else a bit more complicated.
-occNameFlavour :: OccName -> String
-occNameFlavour (VarOcc s) | isLexConId s = "data constructor"
- | otherwise = "value"
-occNameFlavour (TvOcc s) = "type variable"
-occNameFlavour (TCOcc s) = "type constructor or class"
-isVarOcc, isTCOcc, isTvOcc :: OccName -> Bool
-isVarOcc (VarOcc s) = True
-isVarOcc other = False
+%************************************************************************
+%* *
+\subsection{Setting provenance and visibility
+%* *
+%************************************************************************
-isTvOcc (TvOcc s) = True
-isTvOcc other = False
+tidyTopName is applied to top-level names in the final program
-isTCOcc (TCOcc s) = True
-isTCOcc other = False
+For top-level things, it globalises Local names
+ (if all top-level things should be visible)
+ and localises non-exported Global names
+ (if only exported things should be visible)
+In all cases except an exported global, it gives it a new occurrence name.
-instance Eq OccName where
- a == b = case (a `cmp` b) of { EQ_ -> True; _ -> False }
- a /= b = case (a `cmp` b) of { EQ_ -> False; _ -> True }
+The "visibility" here concerns whether the .o file's symbol table
+mentions the thing; if so, it needs a module name in its symbol.
+The Global things are "visible" and the Local ones are not
-instance Ord OccName where
- a <= b = case (a `cmp` b) of { LT_ -> True; EQ_ -> True; GT__ -> False }
- a < b = case (a `cmp` b) of { LT_ -> True; EQ_ -> False; GT__ -> False }
- a >= b = case (a `cmp` b) of { LT_ -> False; EQ_ -> True; GT__ -> True }
- a > b = case (a `cmp` b) of { LT_ -> False; EQ_ -> False; GT__ -> True }
+Why should things be "visible"? Certainly they must be if they
+are exported. But also:
-instance Ord3 OccName where
- cmp = cmpOcc
+(a) In certain (prelude only) modules we split up the .hc file into
+ lots of separate little files, which are separately compiled by the C
+ compiler. That gives lots of little .o files. The idea is that if
+ you happen to mention one of them you don't necessarily pull them all
+ in. (Pulling in a piece you don't need can be v bad, because it may
+ mention other pieces you don't need either, and so on.)
+
+ Sadly, splitting up .hc files means that local names (like s234) are
+ now globally visible, which can lead to clashes between two .hc
+ files. So unlocaliseWhatnot goes through making all the local things
+ into global things, essentially by giving them full names so when they
+ are printed they'll have their module name too. Pretty revolting
+ really.
-(VarOcc s1) `cmpOcc` (VarOcc s2) = s1 `_CMP_STRING_` s2
-(VarOcc s1) `cmpOcc` other2 = LT_
+(b) When optimisation is on we want to make all the internal
+ top-level defns externally visible
-(TvOcc s1) `cmpOcc` (VarOcc s2) = GT_
-(TvOcc s1) `cmpOcc` (TvOcc s2) = s1 `_CMP_STRING_` s2
-(TvOcc s1) `cmpOcc` other = LT_
+\begin{code}
+tidyTopName :: Module -> TidyOccEnv -> Name -> (TidyOccEnv, Name)
+tidyTopName mod env name
+ | isExported name = (env, name) -- Don't fiddle with an exported name
+ -- It should be in the TidyOccEnv already
+ | otherwise = (env', name')
+ where
+ (env', occ') = tidyOccName env (n_occ name)
-(TCOcc s1) `cmpOcc` (TCOcc s2) = s1 `_CMP_STRING_` s2
-(TCOcc s1) `cmpOcc` other = GT_
+ name' = Name { n_uniq = n_uniq name, n_sort = mk_top_sort mod,
+ n_occ = occ', n_prov = LocalDef noSrcLoc NotExported }
-instance Outputable OccName where
- ppr = pprOccName
-\end{code}
+mk_top_sort mod | all_toplev_ids_visible = Global mod
+ | otherwise = Local
+all_toplev_ids_visible =
+ not opt_OmitInterfacePragmas || -- Pragmas can make them visible
+ opt_EnsureSplittableC -- Splitting requires visiblilty
+\end{code}
\begin{code}
-parenInCode, quoteInText :: OccName -> Bool
-parenInCode occ = isLexSym (occNameString occ)
+setNameProvenance :: Name -> Provenance -> Name
+ -- setNameProvenance used to only change the provenance of
+ -- Implicit-provenance things, but that gives bad error messages
+ -- for names defined twice in the same module, so I changed it to
+ -- set the provenance of *any* global (SLPJ Jun 97)
+setNameProvenance name prov = name {n_prov = prov}
-quoteInText occ = not (isLexSym (occNameString occ))
+getNameProvenance :: Name -> Provenance
+getNameProvenance name = n_prov name
+
+setNameImportReason :: Name -> ImportReason -> Name
+setNameImportReason name reason
+ = name { n_prov = new_prov }
+ where
+ -- It's important that we don't do the pattern matching
+ -- in the top-level clause, else we get a black hole in
+ -- the renamer. Rather a yukky constraint. There's only
+ -- one call, in RnNames
+ old_prov = n_prov name
+ new_prov = case old_prov of
+ NonLocalDef _ omit -> NonLocalDef reason omit
+ other -> old_prov
\end{code}
+
%************************************************************************
%* *
-\subsection[Name-datatype]{The @Name@ datatype, and name construction}
+\subsection{Provenance and export info}
%* *
%************************************************************************
-
+
\begin{code}
-data Name
- = Local Unique
- OccName
- SrcLoc
-
- | Global Unique
- Module -- The defining module
- OccName -- Its name in that module
- DefnInfo -- How it is defined
- Provenance -- How it was brought into scope
+data Provenance
+ = LocalDef -- Defined locally
+ SrcLoc -- Defn site
+ ExportFlag -- Whether it's exported
+
+ | NonLocalDef -- Defined non-locally
+ ImportReason
+ PrintUnqualified
+
+ | SystemProv -- Either (a) a system-generated local with
+ -- a v short name OccName
+ -- or (b) a known-key global which should have a proper
+ -- provenance attached by the renamer
\end{code}
-Things with a @Global@ name are given C static labels, so they finally
-appear in the .o file's symbol table. They appear in the symbol table
-in the form M.n. If originally-local things have this property they
-must be made @Global@ first.
+Sys-provs are only used internally. When the compiler generates (say)
+a fresh desguar variable it always calls it "ds", and of course it gets
+a fresh unique. But when printing -ddump-xx dumps, we must print it with
+its unique, because there'll be a lot of "ds" variables.
+
+Names with SystemProv differ in the following ways:
+ a) locals have unique attached when printing dumps
+ b) unifier eliminates sys tyvars in favour of user provs where possible
+ c) renamer replaces SystemProv with a better one
+
+Before anything gets printed in interface files or output code, it's
+fed through a 'tidy' processor, which zaps the OccNames to have
+unique names; and converts all sys-locals to user locals
+If any desugarer sys-locals have survived that far, they get changed to
+"ds1", "ds2", etc.
\begin{code}
-data DefnInfo = VanillaDefn
- | WiredInTyCon TyCon -- There's a wired-in version
- | WiredInId Id -- ...ditto...
+data ImportReason
+ = UserImport Module SrcLoc Bool -- Imported from module M on line L
+ -- Note the M may well not be the defining module
+ -- for this thing!
+ -- The Bool is true iff the thing was named *explicitly* in the import spec,
+ -- rather than being imported as part of a group; e.g.
+ -- import B
+ -- import C( T(..) )
+ -- Here, everything imported by B, and the constructors of T
+ -- are not named explicitly; only T is named explicitly.
+ -- This info is used when warning of unused names.
+
+ | ImplicitImport -- Imported implicitly for some other reason
+
+
+type PrintUnqualified = Bool -- True <=> the unqualified name of this thing is
+ -- in scope in this module, so print it
+ -- unqualified in error messages
-data Provenance
- = LocalDef ExportFlag SrcLoc -- Locally defined
- | Imported Module SrcLoc -- Directly imported from M; gives locn of import statement
- | Implicit -- Implicitly imported
+data ExportFlag = Exported | NotExported
\end{code}
Something is "Exported" if it may be mentioned by another module without
Furthermore, being Exported means that we can't see all call sites of the thing.
Exported things include:
- - explicitly exported Ids, including data constructors, class method selectors
+
+ - explicitly exported Ids, including data constructors,
+ class method selectors
+
- dfuns from instance decls
Being Exported is *not* the same as finally appearing in the .o file's
Id's unfolding in the interface file, in which case the local Id goes
out too.
-\begin{code}
-data ExportFlag = Exported | NotExported
-\end{code}
\begin{code}
-mkLocalName :: Unique -> OccName -> SrcLoc -> Name
-mkLocalName = Local
-
-mkGlobalName :: Unique -> Module -> OccName -> DefnInfo -> Provenance -> Name
-mkGlobalName = Global
-
-mkSysLocalName :: Unique -> FAST_STRING -> SrcLoc -> Name
-mkSysLocalName uniq str loc = Local uniq (VarOcc str) loc
-
-mkWiredInIdName :: Unique -> Module -> FAST_STRING -> Id -> Name
-mkWiredInIdName uniq mod occ id
- = Global uniq mod (VarOcc occ) (WiredInId id) Implicit
-
-mkWiredInTyConName :: Unique -> Module -> FAST_STRING -> TyCon -> Name
-mkWiredInTyConName uniq mod occ tycon
- = Global uniq mod (TCOcc occ) (WiredInTyCon tycon) Implicit
-
-
-mkCompoundName :: (FAST_STRING -> FAST_STRING) -- Occurrence-name modifier
- -> Unique -- New unique
- -> Name -- Base name (must be a Global)
- -> Name -- Result is always a value name
-
-mkCompoundName str_fn uniq (Global _ mod occ defn prov)
- = Global uniq mod new_occ defn prov
- where
- new_occ = VarOcc (str_fn (occNameString occ)) -- Always a VarOcc
-
-mkCompoundName str_fn uniq (Local _ occ loc)
- = Local uniq (VarOcc (str_fn (occNameString occ))) loc
-
- -- Rather a wierd one that's used for names generated for instance decls
-mkInstDeclName :: Unique -> Module -> OccName -> SrcLoc -> Bool -> Name
-mkInstDeclName uniq mod occ loc from_here
- = Global uniq mod occ VanillaDefn prov
- where
- prov | from_here = LocalDef Exported loc
- | otherwise = Implicit
-
-
-setNameProvenance :: Name -> Provenance -> Name -- Implicit Globals only
-setNameProvenance (Global uniq mod occ def Implicit) prov = Global uniq mod occ def prov
-setNameProvenance other_name prov = other_name
-
-getNameProvenance :: Name -> Provenance
-getNameProvenance (Global uniq mod occ def prov) = prov
-getNameProvenance (Local uniq occ locn) = LocalDef NotExported locn
-
--- When we renumber/rename things, we need to be
--- able to change a Name's Unique to match the cached
--- one in the thing it's the name of. If you know what I mean.
-changeUnique (Local _ n l) u = Local u n l
-changeUnique (Global _ mod occ def prov) u = Global u mod occ def prov
-
-setNameVisibility :: Module -> Name -> Name
--- setNameVisibility is applied to top-level names in the final program
--- The "visibility" here concerns whether the .o file's symbol table
--- mentions the thing; if so, it needs a module name in its symbol,
--- otherwise we just use its unique. The Global things are "visible"
--- and the local ones are not
-
-setNameVisibility _ (Global uniq mod occ def (LocalDef NotExported loc))
- | not all_toplev_ids_visible
- = Local uniq occ loc
-
-setNameVisibility mod (Local uniq occ loc)
- | all_toplev_ids_visible
- = Global uniq mod
- (VarOcc (showUnique uniq)) -- It's local name must be unique!
- VanillaDefn (LocalDef NotExported loc)
-
-setNameVisibility mod name = name
-
-all_toplev_ids_visible = not opt_OmitInterfacePragmas || -- Pragmas can make them visible
- opt_EnsureSplittableC -- Splitting requires visiblilty
+systemProvenance :: Provenance
+systemProvenance = SystemProv
+-- pprNameProvenance is used in error messages to say where a name came from
+pprNameProvenance :: Name -> SDoc
+pprNameProvenance name = pprProvenance (getNameProvenance name)
+
+pprProvenance :: Provenance -> SDoc
+pprProvenance SystemProv = ptext SLIT("System")
+pprProvenance (LocalDef loc _) = ptext SLIT("defined at") <+> ppr loc
+pprProvenance (NonLocalDef ImplicitImport _)
+ = ptext SLIT("implicitly imported")
+pprProvenance (NonLocalDef (UserImport mod loc _) _)
+ = ptext SLIT("imported from") <+> ppr mod <+> ptext SLIT("at") <+> ppr loc
\end{code}
+
%************************************************************************
%* *
\subsection{Predicates and selectors}
\begin{code}
nameUnique :: Name -> Unique
-nameModAndOcc :: Name -> (Module, OccName) -- Globals only
nameOccName :: Name -> OccName
nameModule :: Name -> Module
-nameString :: Name -> FAST_STRING -- A.b form
nameSrcLoc :: Name -> SrcLoc
isLocallyDefinedName :: Name -> Bool
isExportedName :: Name -> Bool
isWiredInName :: Name -> Bool
isLocalName :: Name -> Bool
+isGlobalName :: Name -> Bool
+isExternallyVisibleName :: Name -> Bool
-nameUnique (Local u _ _) = u
-nameUnique (Global u _ _ _ _) = u
+nameUnique name = n_uniq name
+nameOccName name = n_occ name
-nameOccName (Local _ occ _) = occ
-nameOccName (Global _ _ occ _ _) = occ
+nameModule name =
+ case n_sort name of
+ Local -> pprPanic "nameModule" (ppr name)
+ x -> nameSortModule x
-nameModule (Global _ mod occ _ _) = mod
+nameSortModule (Global mod) = mod
+nameSortModule (WiredInId mod _) = mod
+nameSortModule (WiredInTyCon mod _) = mod
-nameModAndOcc (Global _ mod occ _ _) = (mod,occ)
+nameRdrName :: Name -> RdrName
+nameRdrName (Name { n_sort = Local, n_occ = occ }) = mkRdrUnqual occ
+nameRdrName (Name { n_sort = sort, n_occ = occ }) = mkRdrQual (nameSortModule sort) occ
-nameString (Local _ occ _) = occNameString occ
-nameString (Global _ mod occ _ _) = mod _APPEND_ SLIT(".") _APPEND_ occNameString occ
+isExportedName (Name { n_prov = LocalDef _ Exported }) = True
+isExportedName other = False
-isExportedName (Global _ _ _ _ (LocalDef Exported _)) = True
-isExportedName other = False
+nameSrcLoc name = provSrcLoc (n_prov name)
-nameSrcLoc (Local _ _ loc) = loc
-nameSrcLoc (Global _ _ _ _ (LocalDef _ loc)) = loc
-nameSrcLoc (Global _ _ _ _ (Imported _ loc)) = loc
-nameSrcLoc other = noSrcLoc
+provSrcLoc (LocalDef loc _) = loc
+provSrcLoc (NonLocalDef (UserImport _ loc _) _) = loc
+provSrcLoc SystemProv = noSrcLoc
-isLocallyDefinedName (Local _ _ _) = True
-isLocallyDefinedName (Global _ _ _ _ (LocalDef _ _)) = True
-isLocallyDefinedName other = False
+isLocallyDefinedName (Name {n_sort = Local}) = True -- Local (might have SystemProv)
+isLocallyDefinedName (Name {n_prov = LocalDef _ _}) = True -- Global, but defined here
+isLocallyDefinedName other = False -- Other
-- Things the compiler "knows about" are in some sense
-- "imported". When we are compiling the module where
-- the entities are defined, we need to be able to pick
-- them out, often in combination with isLocallyDefined.
-isWiredInName (Global _ _ _ (WiredInTyCon _) _) = True
-isWiredInName (Global _ _ _ (WiredInId _) _) = True
-isWiredInName _ = False
+isWiredInName (Name {n_sort = WiredInTyCon _ _}) = True
+isWiredInName (Name {n_sort = WiredInId _ _}) = True
+isWiredInName _ = False
maybeWiredInIdName :: Name -> Maybe Id
-maybeWiredInIdName (Global _ _ _ (WiredInId id) _) = Just id
-maybeWiredInIdName other = Nothing
+maybeWiredInIdName (Name {n_sort = WiredInId _ id}) = Just id
+maybeWiredInIdName other = Nothing
maybeWiredInTyConName :: Name -> Maybe TyCon
-maybeWiredInTyConName (Global _ _ _ (WiredInTyCon tc) _) = Just tc
-maybeWiredInTyConName other = Nothing
+maybeWiredInTyConName (Name {n_sort = WiredInTyCon _ tc}) = Just tc
+maybeWiredInTyConName other = Nothing
+
+isLocalName (Name {n_sort = Local}) = True
+isLocalName _ = False
-isLocalName (Local _ _ _) = True
-isLocalName _ = False
+isGlobalName (Name {n_sort = Local}) = False
+isGlobalName other = True
+
+-- Global names are by definition those that are visible
+-- outside the module, *as seen by the linker*. Externally visible
+-- does not mean visible at the source level (that's isExported).
+isExternallyVisibleName name = isGlobalName name
+
+isSystemName (Name {n_prov = SystemProv}) = True
+isSystemName other = False
\end{code}
%************************************************************************
\begin{code}
-cmpName n1 n2 = c n1 n2
- where
- c (Local u1 _ _) (Local u2 _ _) = cmp u1 u2
- c (Local _ _ _) _ = LT_
- c (Global u1 _ _ _ _) (Global u2 _ _ _ _) = cmp u1 u2
- c (Global _ _ _ _ _) _ = GT_
+cmpName n1 n2 = n_uniq n1 `compare` n_uniq n2
\end{code}
\begin{code}
instance Eq Name where
- a == b = case (a `cmp` b) of { EQ_ -> True; _ -> False }
- a /= b = case (a `cmp` b) of { EQ_ -> False; _ -> True }
+ a == b = case (a `compare` b) of { EQ -> True; _ -> False }
+ a /= b = case (a `compare` b) of { EQ -> False; _ -> True }
instance Ord Name where
- a <= b = case (a `cmp` b) of { LT_ -> True; EQ_ -> True; GT__ -> False }
- a < b = case (a `cmp` b) of { LT_ -> True; EQ_ -> False; GT__ -> False }
- a >= b = case (a `cmp` b) of { LT_ -> False; EQ_ -> True; GT__ -> True }
- a > b = case (a `cmp` b) of { LT_ -> False; EQ_ -> False; GT__ -> True }
-
-instance Ord3 Name where
- cmp = cmpName
+ a <= b = case (a `compare` b) of { LT -> True; EQ -> True; GT -> False }
+ a < b = case (a `compare` b) of { LT -> True; EQ -> False; GT -> False }
+ a >= b = case (a `compare` b) of { LT -> False; EQ -> True; GT -> True }
+ a > b = case (a `compare` b) of { LT -> False; EQ -> False; GT -> True }
+ compare a b = cmpName a b
instance Uniquable Name where
- uniqueOf = nameUnique
+ getUnique = nameUnique
instance NamedThing Name where
getName n = n
\end{code}
-
%************************************************************************
%* *
\subsection{Pretty printing}
\begin{code}
instance Outputable Name where
- ppr PprQuote name@(Local _ _ _) = quotes (ppr PprForUser name)
- ppr PprForUser (Local _ n _) = ptext (occNameString n)
-
- ppr sty (Local u n _) | codeStyle sty ||
- ifaceStyle sty = pprUnique u
-
- ppr sty (Local u n _) = hcat [ptext (occNameString n), ptext SLIT("_"), pprUnique u]
-
- ppr PprQuote name@(Global _ _ _ _ _) = quotes (ppr PprForUser name)
-
- ppr sty name@(Global u m n _ _)
- | codeStyle sty
- = identToC (m _APPEND_ SLIT(".") _APPEND_ occNameString n)
-
- ppr sty name@(Global u m n _ prov)
- = hcat [pp_mod, ptext (occNameString n), pp_debug sty name]
- where
- pp_mod = case prov of --- Omit home module qualifier
- LocalDef _ _ -> empty
- other -> pprModule PprForUser m <> char '.'
-
-
-pp_debug PprDebug (Global uniq m n _ prov) = hcat [text "{-", pprUnique uniq, char ',',
- pp_prov prov, text "-}"]
- where
- pp_prov (LocalDef Exported _) = char 'x'
- pp_prov (LocalDef NotExported _) = char 'l'
- pp_prov (Imported _ _) = char 'i'
- pp_prov Implicit = char 'p'
-pp_debug other name = empty
-
--- pprNameProvenance is used in error messages to say where a name came from
-pprNameProvenance :: PprStyle -> Name -> Doc
-pprNameProvenance sty (Local _ _ loc) = pprProvenance sty (LocalDef NotExported loc)
-pprNameProvenance sty (Global _ _ _ _ prov) = pprProvenance sty prov
-
-pprProvenance :: PprStyle -> Provenance -> Doc
-pprProvenance sty (Imported mod loc)
- = sep [ptext SLIT("Imported from"), pprModule sty mod, ptext SLIT("at"), ppr sty loc]
-pprProvenance sty (LocalDef _ loc)
- = sep [ptext SLIT("Defined at"), ppr sty loc]
-pprProvenance sty Implicit
- = panic "pprNameProvenance: Implicit"
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection[Sets of names}
-%* *
-%************************************************************************
-
-\begin{code}
-type NameSet = UniqSet Name
-emptyNameSet :: NameSet
-unitNameSet :: Name -> NameSet
-addListToNameSet :: NameSet -> [Name] -> NameSet
-mkNameSet :: [Name] -> NameSet
-unionNameSets :: NameSet -> NameSet -> NameSet
-unionManyNameSets :: [NameSet] -> NameSet
-minusNameSet :: NameSet -> NameSet -> NameSet
-elemNameSet :: Name -> NameSet -> Bool
-nameSetToList :: NameSet -> [Name]
-isEmptyNameSet :: NameSet -> Bool
-
-isEmptyNameSet = isEmptyUniqSet
-emptyNameSet = emptyUniqSet
-unitNameSet = unitUniqSet
-mkNameSet = mkUniqSet
-addListToNameSet = addListToUniqSet
-unionNameSets = unionUniqSets
-unionManyNameSets = unionManyUniqSets
-minusNameSet = minusUniqSet
-elemNameSet = elementOfUniqSet
-nameSetToList = uniqSetToList
+ -- When printing interfaces, all Locals have been given nice print-names
+ ppr name = pprName name
+
+pprName (Name {n_sort = Local, n_uniq = uniq, n_occ = occ, n_prov = prov})
+ -- Locals
+ = getPprStyle $ \ sty ->
+ if codeStyle sty then
+ pprUnique uniq -- When printing in code we required all names to
+ -- be globally unique; for example, we use this identifier
+ -- for the closure name. So we just print the unique alone.
+ else
+ pprOccName occ <> pp_local_extra sty uniq
+ where
+ sys_local = case prov of
+ SystemProv -> True
+ other -> False
+
+ pp_local_extra sty uniq
+ | sys_local = underscore <> pprUnique uniq -- Must print uniques for sys_locals
+ | debugStyle sty = text "{-" <> pprUnique uniq <> text "-}"
+ | otherwise = empty
+
+
+pprName (Name {n_sort = sort, n_uniq = uniq, n_occ = occ, n_prov = prov})
+ -- Globals, and wired in things
+ = getPprStyle $ \ sty ->
+ if codeStyle sty then
+ ppr mod <> underscore <> ppr occ
+ else
+ pp_mod_dot sty <> ppr occ <> pp_global_debug sty uniq prov
+ where
+ mod = nameSortModule sort
+
+ pp_mod_dot sty
+ = case prov of
+ SystemProv -> pp_qual mod pp_sep user_sty
+ -- Hack alert! Omit the qualifier on SystemProv things in user style
+ -- I claim such SystemProv things will also be WiredIn things.
+ -- We can't get the omit flag right
+ -- on wired in tycons etc (sigh) so we just leave it out in user style,
+ -- and hope that leaving it out isn't too consfusing.
+ -- (e.g. if the programmer hides Bool and redefines it. If so, use -dppr-debug.)
+
+ LocalDef _ _ -> pp_qual mod dot (user_sty || iface_sty)
+
+ NonLocalDef (UserImport imp_mod _ _) omit
+ | user_sty -> pp_qual imp_mod pp_sep omit
+ | otherwise -> pp_qual mod pp_sep False
+ NonLocalDef ImplicitImport omit -> pp_qual mod pp_sep (user_sty && omit)
+ where
+ user_sty = userStyle sty
+ iface_sty = ifaceStyle sty
+
+ pp_qual mod sep omit_qual
+ | omit_qual = empty
+ | otherwise = pprModule mod <> sep
+
+ pp_sep | bootFlavour (moduleIfaceFlavour mod) = text "!" -- M!t indicates a name imported
+ -- from a .hi-boot interface
+ | otherwise = dot -- Vanilla case
+
+ pp_global_debug sty uniq prov
+ | debugStyle sty = hcat [text "{-", pprUnique uniq, prov_p prov, text "-}"]
+ | otherwise = empty
+
+ prov_p prov | opt_PprStyle_NoPrags = empty
+ | otherwise = comma <> pp_prov prov
+
+pp_prov (LocalDef _ Exported) = char 'x'
+pp_prov (LocalDef _ NotExported) = char 'l'
+pp_prov (NonLocalDef ImplicitImport _) = char 'j'
+pp_prov (NonLocalDef (UserImport _ _ True ) _) = char 'I' -- Imported by name
+pp_prov (NonLocalDef (UserImport _ _ False) _) = char 'i' -- Imported by ..
+pp_prov SystemProv = char 's'
\end{code}
-
%************************************************************************
%* *
\subsection{Overloaded functions related to Names}
\begin{code}
class NamedThing a where
- getOccName :: a -> OccName -- Even RdrNames can do this!
+ getOccName :: a -> OccName
getName :: a -> Name
getOccName n = nameOccName (getName n) -- Default method
\end{code}
\begin{code}
-modAndOcc :: NamedThing a => a -> (Module, OccName)
-getModule :: NamedThing a => a -> Module
getSrcLoc :: NamedThing a => a -> SrcLoc
isLocallyDefined :: NamedThing a => a -> Bool
isExported :: NamedThing a => a -> Bool
getOccString :: NamedThing a => a -> String
-modAndOcc = nameModAndOcc . getName
-getModule = nameModule . getName
isExported = isExportedName . getName
getSrcLoc = nameSrcLoc . getName
isLocallyDefined = isLocallyDefinedName . getName
-getOccString x = _UNPK_ (occNameString (getOccName x))
+getOccString x = occNameString (getOccName x)
\end{code}
\begin{code}
-{-# SPECIALIZE isLocallyDefined
- :: Name -> Bool
- #-}
+{-# SPECIALIZE isLocallyDefined :: Name -> Bool #-}
\end{code}
projects / ghc-hetmet.git / blobdiff