%
-% (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),
+ -- Re-export the Module type
+ Module,
pprModule, moduleString,
+ -- The basic form of names
+ isLexCon, isLexVar, isLexId, isLexSym,
+ isLexConId, isLexConSym, isLexVarId, isLexVarSym,
+ mkTupNameStr, mkUbxTupNameStr, isLowerISO, isUpperISO,
+
-- The OccName type
- OccName(..),
- pprOccName, pprSymOcc, pprNonSymOcc, occNameString, occNameFlavour, isTvOcc,
- quoteInText, parenInCode,
+ OccName(..), varOcc,
+ pprOccName, occNameString, occNameFlavour,
+ isTvOcc, isTCOcc, isVarOcc, prefixOccName,
-- The Name type
Name, -- Abstract
mkLocalName, mkSysLocalName,
- mkCompoundName, mkGlobalName, mkInstDeclName,
+ mkCompoundName, mkGlobalName,
mkWiredInIdName, mkWiredInTyConName,
maybeWiredInIdName, maybeWiredInTyConName,
isWiredInName,
- nameUnique, changeUnique, setNameProvenance, setNameVisibility,
- nameOccName, nameString,
+ nameUnique, changeUnique, setNameProvenance, getNameProvenance,
+ setNameVisibility, mkNameVisible,
+ nameOccName, nameModule,
+
isExportedName, nameSrcLoc,
isLocallyDefinedName,
- isLocalName,
+ isSysLocalName, isLocalName, isGlobalName, isExternallyVisibleName,
pprNameProvenance,
- -- Sets of Names
- NameSet(..),
- emptyNameSet, unitNameSet, mkNameSet, unionNameSets, unionManyNameSets,
- minusNameSet, elemNameSet, nameSetToList, addListToNameSet,
+ -- Special Names
+ dictNamePrefix, mkSuperDictSelName, mkWorkerName,
+ mkDefaultMethodName, mkClassTyConStr, mkClassDataConStr,
-- Misc
- DefnInfo(..),
Provenance(..), pprProvenance,
- ExportFlag(..),
+ ExportFlag(..),
+ PrintUnqualified,
-- Class NamedThing and overloaded friends
NamedThing(..),
modAndOcc, isExported,
- getSrcLoc, isLocallyDefined, getOccString,
-
- pprSym, pprNonSym
+ 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 Unique ( pprUnique, showUnique, Unique )
-import UniqSet ( UniqSet(..), emptyUniqSet, unitUniqSet, unionUniqSets, uniqSetToList,
- unionManyUniqSets, minusUniqSet, mkUniqSet, elementOfUniqSet, addListToUniqSet )
-import UniqFM ( UniqFM )
-import Util ( cmpPString, panic, assertPanic {-, pprTrace ToDo:rm-} )
+#include "HsVersions.h"
+
+import {-# SOURCE #-} Var ( Id )
+import {-# SOURCE #-} TyCon ( TyCon )
+
+import CStrings ( identToC )
+import PrelMods ( pREL_BASE, pREL_TUP, pREL_GHC )
+import CmdLineOpts ( opt_PprStyle_NoPrags, opt_OmitInterfacePragmas, opt_EnsureSplittableC )
+import BasicTypes ( Module, IfaceFlavour(..), moduleString, pprModule )
+
+import SrcLoc ( noSrcLoc, mkBuiltinSrcLoc, SrcLoc )
+import Unique ( pprUnique, Unique, Uniquable(..) )
+import Outputable
+import Char ( isUpper, isLower, ord )
+import Util ( nOfThem )
+import GlaExts
\end{code}
%************************************************************************
%* *
-\subsection[Name-pieces-datatypes]{The @Module@, @OccName@ datatypes}
+\subsection{Lexical categories}
%* *
%************************************************************************
+These functions test strings to see if they fit the lexical categories
+defined in the Haskell report.
+
\begin{code}
-type Module = FAST_STRING
+isLexCon, isLexVar, isLexId, isLexSym, isLexConId, isLexConSym,
+ isLexVarId, isLexVarSym :: FAST_STRING -> Bool
+
+isLexCon cs = isLexConId cs || isLexConSym cs
+isLexVar cs = isLexVarId cs || isLexVarSym cs
+
+isLexId cs = isLexConId cs || isLexVarId cs
+isLexSym cs = isLexConSym cs || isLexVarSym cs
+-------------
+
+isLexConId cs
+ | _NULL_ cs = False
+ | cs == SLIT("[]") = True
+ | c == '(' = True -- (), (,), (,,), ...
+ | otherwise = isUpper c || isUpperISO c
+ where
+ c = _HEAD_ cs
+
+isLexVarId cs
+ | _NULL_ cs = False
+ | otherwise = isLower c || isLowerISO c
+ where
+ c = _HEAD_ cs
+
+isLexConSym cs
+ | _NULL_ cs = False
+ | otherwise = c == ':'
+ || cs == SLIT("->")
+ where
+ c = _HEAD_ cs
+
+isLexVarSym cs
+ | _NULL_ cs = False
+ | otherwise = isSymbolASCII c
+ || isSymbolISO c
+ where
+ c = _HEAD_ cs
+
+-------------
+isSymbolASCII c = c `elem` "!#$%&*+./<=>?@\\^|~-"
+isSymbolISO c = ord c `elem` (0xd7 : 0xf7 : [0xa1 .. 0xbf])
+isUpperISO (C# c#) = c# `geChar#` '\xc0'# && c# `leChar#` '\xde'# && c# `neChar#` '\xd7'#
+--0xc0 <= oc && oc <= 0xde && oc /= 0xd7 where oc = ord c
+isLowerISO (C# c#) = c# `geChar#` '\xdf'# && c# `leChar#` '\xff'# && c# `neChar#` '\xf7'#
+--0xdf <= oc && oc <= 0xff && oc /= 0xf7 where oc = ord c
+\end{code}
+
+\begin{code}
+mkTupNameStr 0 = (pREL_BASE, SLIT("()"))
+mkTupNameStr 1 = panic "Name.mkTupNameStr: 1 ???"
+mkTupNameStr 2 = (pREL_TUP, _PK_ "(,)") -- not strictly necessary
+mkTupNameStr 3 = (pREL_TUP, _PK_ "(,,)") -- ditto
+mkTupNameStr 4 = (pREL_TUP, _PK_ "(,,,)") -- ditto
+mkTupNameStr n = (pREL_TUP, _PK_ ("(" ++ nOfThem (n-1) ',' ++ ")"))
+
+mkUbxTupNameStr 0 = panic "Name.mkUbxTupNameStr: 0 ???"
+mkUbxTupNameStr 1 = (pREL_GHC, _PK_ "(# #)") -- 1 and 0 both make sense!!!
+mkUbxTupNameStr 2 = (pREL_GHC, _PK_ "(#,#)")
+mkUbxTupNameStr 3 = (pREL_GHC, _PK_ "(#,,#)")
+mkUbxTupNameStr 4 = (pREL_GHC, _PK_ "(#,,,#)")
+mkUbxTupNameStr n = (pREL_GHC, _PK_ ("(#" ++ nOfThem (n-1) ',' ++ "#)"))
+\end{code}
+
+
+%************************************************************************
+%* *
+\subsection[Name-pieces-datatypes]{The @OccName@ datatypes}
+%* *
+%************************************************************************
+
+\begin{code}
data OccName = VarOcc FAST_STRING -- Variables and data constructors
| TvOcc FAST_STRING -- Type variables
| TCOcc FAST_STRING -- Type constructors and classes
-moduleString :: Module -> String
-moduleString mod = _UNPK_ mod
-
-pprModule :: PprStyle -> Module -> Pretty
-pprModule sty m = ppPStr m
+pprOccName :: OccName -> SDoc
+pprOccName n = getPprStyle $ \ sty ->
+ if codeStyle sty
+ then identToC (occNameString n)
+ else ptext (occNameString n)
-pprOccName :: PprStyle -> OccName -> Pretty
-pprOccName PprDebug n = ppCat [ppPStr (occNameString n), ppBracket (ppStr (occNameFlavour n))]
-pprOccName sty n = if codeStyle sty
- then identToC (occNameString n)
- else ppPStr (occNameString n)
+varOcc :: FAST_STRING -> OccName
+varOcc = VarOcc
occNameString :: OccName -> FAST_STRING
occNameString (VarOcc s) = s
occNameString (TvOcc s) = s
occNameString (TCOcc s) = s
+mapOccName :: (FAST_STRING -> FAST_STRING) -> OccName -> OccName
+mapOccName f (VarOcc s) = VarOcc (f s)
+mapOccName f (TvOcc s) = TvOcc (f s)
+mapOccName f (TCOcc s) = TCOcc (f s)
+
+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)
+
-- 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"
+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
-isTvOcc :: OccName -> Bool
isTvOcc (TvOcc s) = True
isTvOcc other = False
+isTCOcc (TCOcc s) = True
+isTCOcc other = False
+
instance Eq OccName 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 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 }
-
-instance Ord3 OccName where
- cmp = cmpOcc
+ 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 = cmpOcc a b
-(VarOcc s1) `cmpOcc` (VarOcc s2) = s1 `_CMP_STRING_` s2
-(VarOcc s1) `cmpOcc` other2 = LT_
+(VarOcc s1) `cmpOcc` (VarOcc s2) = s1 `compare` s2
+(VarOcc s1) `cmpOcc` other2 = LT
-(TvOcc s1) `cmpOcc` (VarOcc s2) = GT_
-(TvOcc s1) `cmpOcc` (TvOcc s2) = s1 `_CMP_STRING_` s2
-(TvOcc s1) `cmpOcc` other = LT_
+(TvOcc s1) `cmpOcc` (VarOcc s2) = GT
+(TvOcc s1) `cmpOcc` (TvOcc s2) = s1 `compare` s2
+(TvOcc s1) `cmpOcc` other = LT
-(TCOcc s1) `cmpOcc` (TCOcc s2) = s1 `_CMP_STRING_` s2
-(TCOcc s1) `cmpOcc` other = GT_
+(TCOcc s1) `cmpOcc` (TCOcc s2) = s1 `compare` s2
+(TCOcc s1) `cmpOcc` other = GT
instance Outputable OccName where
ppr = pprOccName
\end{code}
-\begin{code}
-parenInCode, quoteInText :: OccName -> Bool
-parenInCode occ = isLexSym (occNameString occ)
-
-quoteInText occ = not (isLexSym (occNameString occ))
-
--- print `vars`, (op) correctly
-pprSymOcc, pprNonSymOcc :: PprStyle -> OccName -> Pretty
-
-pprSymOcc sty var
- = if quoteInText var
- then ppQuote (pprOccName sty var)
- else pprOccName sty var
-
-pprNonSymOcc sty var
- = if parenInCode var
- then ppParens (pprOccName sty var)
- else pprOccName sty var
-\end{code}
-
%************************************************************************
%* *
\subsection[Name-datatype]{The @Name@ datatype, and name construction}
\begin{code}
data Name
= Local Unique
- OccName
- SrcLoc
+ (Maybe OccName) -- For ones that started life with a user name
| Global Unique
Module -- The defining module
OccName -- Its name in that module
- DefnInfo -- How it is defined
- Provenance -- How it was brought into scope
+ Provenance -- How it was defined
\end{code}
Things with a @Global@ name are given C static labels, so they finally
must be made @Global@ first.
\begin{code}
-data DefnInfo = VanillaDefn
- | WiredInTyCon TyCon -- There's a wired-in version
- | WiredInId Id -- ...ditto...
-
data Provenance
- = LocalDef ExportFlag SrcLoc -- Locally defined
- | Imported Module SrcLoc -- Directly imported from M; gives locn of import statement
- | Implicit -- Implicitly imported
+ = NoProvenance
+
+ | LocalDef -- Defined locally
+ SrcLoc -- Defn site
+ ExportFlag -- Whether it's exported
+
+ | NonLocalDef -- Defined non-locally
+ SrcLoc -- Defined non-locally; src-loc gives defn site
+ IfaceFlavour -- Whether the defn site is an .hi-boot file
+ PrintUnqualified
+
+ | WiredInTyCon TyCon -- There's a wired-in version
+ | WiredInId Id -- ...ditto...
+
+type PrintUnqualified = Bool -- True <=> the unqualified name of this thing is
+ -- in scope in this module, so print it
+ -- unqualified in error messages
\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
\end{code}
\begin{code}
-mkLocalName :: Unique -> OccName -> SrcLoc -> Name
-mkLocalName = Local
+mkLocalName :: Unique -> OccName -> Name
+mkLocalName uniq occ = Local uniq (Just occ)
-mkGlobalName :: Unique -> Module -> OccName -> DefnInfo -> Provenance -> Name
+mkGlobalName :: Unique -> Module -> OccName -> Provenance -> Name
mkGlobalName = Global
-mkSysLocalName :: Unique -> FAST_STRING -> SrcLoc -> Name
-mkSysLocalName uniq str loc = Local uniq (VarOcc str) loc
+mkSysLocalName :: Unique -> Name
+mkSysLocalName uniq = Local uniq Nothing
mkWiredInIdName :: Unique -> Module -> FAST_STRING -> Id -> Name
mkWiredInIdName uniq mod occ id
- = Global uniq mod (VarOcc occ) (WiredInId id) Implicit
+ = Global uniq mod (VarOcc occ) (WiredInId id)
mkWiredInTyConName :: Unique -> Module -> FAST_STRING -> TyCon -> Name
mkWiredInTyConName uniq mod occ tycon
- = Global uniq mod (TCOcc occ) (WiredInTyCon tycon) Implicit
+ = Global uniq mod (TCOcc occ) (WiredInTyCon tycon)
-mkCompoundName :: (FAST_STRING -> FAST_STRING) -- Occurrence-name modifier
- -> Unique -- New unique
- -> Name -- Base name (must be a Global)
+mkCompoundName :: (OccName -> OccName)
+ -> Unique -- New unique
+ -> Name -- Base name
-> 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 f uniq (Global _ mod occ prov)
+ = Global uniq mod (f occ) prov
-mkCompoundName str_fn uniq (Local _ occ loc)
- = Local uniq (VarOcc (str_fn (occNameString occ))) loc
+mkCompoundName f uniq (Local _ (Just occ))
+ = Local uniq (Just (f occ))
- -- 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
+mkCompoundName f uniq (Local _ Nothing)
+ = Local uniq Nothing
+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 (Global uniq mod occ _) prov = Global uniq mod occ prov
+setNameProvenance other_name prov = other_name
-setNameProvenance :: Name -> Provenance -> Name -- Globals only
-setNameProvenance (Global uniq mod occ def _) prov = Global uniq mod occ def prov
+getNameProvenance :: Name -> Provenance
+getNameProvenance (Global uniq mod occ prov) = prov
+getNameProvenance (Local uniq occ) = LocalDef noSrcLoc NotExported
-- 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
+changeUnique (Local _ n ) u = Local u n
+changeUnique (Global _ mod occ prov) u = Global u mod occ prov
+\end{code}
+
+setNameVisibility is applied to names in the final program
+
+The Maybe Module argument is (Just mod) for top-level values,
+and Nothing for all others (local values and type variables)
+
+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)
+
+For nested things it localises Global names.
-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
+In all cases except an exported global, it gives it a new occurrence name.
-setNameVisibility _ (Global uniq mod occ def (LocalDef NotExported loc))
- | not all_toplev_ids_visible
- = Local uniq occ loc
+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
-setNameVisibility mod (Local uniq occ loc)
+Why should things be "visible"? Certainly they must be if they
+are exported. But also:
+
+(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.
+
+(b) When optimisation is on we want to make all the internal
+ top-level defns externally visible
+
+\begin{code}
+setNameVisibility :: Maybe Module -> Unique -> Name -> Name
+
+setNameVisibility maybe_mod uniq name@(Global _ mod occ (LocalDef loc NotExported))
+ | not all_toplev_ids_visible || not_top_level maybe_mod
+ = Local uniq Nothing -- Localise Global name
+
+setNameVisibility maybe_mod uniq name@(Global _ _ _ _)
+ = name -- Otherwise don't fiddle with Global
+
+setNameVisibility (Just mod) uniq (Local _ _)
| all_toplev_ids_visible
- = Global uniq mod
- (VarOcc (showUnique uniq)) -- It's local name must be unique!
- VanillaDefn (LocalDef NotExported loc)
+ = Global uniq mod -- Globalise Local name
+ (uniqToOccName uniq)
+ (LocalDef noSrcLoc NotExported)
+
+setNameVisibility maybe_mod uniq (Local _ _)
+ = Local uniq Nothing -- New unique for Local; zap its occ
+
+-- make the Name globally visible regardless.
+mkNameVisible :: Module -> Unique -> Name -> Name
+mkNameVisible mod occ_uniq nm@(Global _ _ _ _) = nm
+mkNameVisible mod occ_uniq nm@(Local uniq occ)
+ = Global uniq mod (uniqToOccName occ_uniq) (LocalDef noSrcLoc Exported)
-setNameVisibility mod name = name
+uniqToOccName uniq = VarOcc (_PK_ ('_':show uniq))
+ -- The "_" is to make sure that this OccName is distinct from all user-defined ones
-all_toplev_ids_visible = not opt_OmitInterfacePragmas || -- Pragmas can make them visible
- opt_EnsureSplittableC -- Splitting requires visiblilty
+not_top_level (Just m) = False
+not_top_level Nothing = True
+
+all_toplev_ids_visible =
+ not opt_OmitInterfacePragmas || -- Pragmas can make them visible
+ opt_EnsureSplittableC -- Splitting requires visiblilty
\end{code}
%************************************************************************
nameUnique :: Name -> Unique
nameModAndOcc :: Name -> (Module, OccName) -- Globals only
nameOccName :: Name -> OccName
-nameString :: Name -> FAST_STRING -- A.b form
+nameModule :: Name -> Module
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 (Local u _) = u
+nameUnique (Global u _ _ _) = u
-nameOccName (Local _ occ _) = occ
-nameOccName (Global _ _ occ _ _) = occ
+nameOccName (Local _ (Just occ)) = occ
+nameOccName (Local uniq Nothing) = pprPanic "nameOccName" (ppr uniq)
+nameOccName (Global _ _ occ _) = occ
-nameModAndOcc (Global _ mod occ _ _) = (mod,occ)
+nameModule (Global _ mod occ _) = mod
-nameString (Local _ occ _) = occNameString occ
-nameString (Global _ mod occ _ _) = mod _APPEND_ SLIT(".") _APPEND_ occNameString occ
+nameModAndOcc (Global _ mod occ _) = (mod,occ)
-isExportedName (Global _ _ _ _ (LocalDef Exported _)) = True
-isExportedName other = False
+isExportedName (Global _ _ _ (LocalDef _ Exported)) = True
+isExportedName other = False
-nameSrcLoc (Local _ _ loc) = loc
-nameSrcLoc (Global _ _ _ _ (LocalDef _ loc)) = loc
-nameSrcLoc (Global _ _ _ _ (Imported _ loc)) = loc
-nameSrcLoc other = noSrcLoc
+nameSrcLoc (Local _ _) = noSrcLoc
+nameSrcLoc (Global _ _ _ (LocalDef loc _)) = loc
+nameSrcLoc (Global _ _ _ (NonLocalDef loc _ _)) = loc
+nameSrcLoc (Global _ _ _ (WiredInTyCon _)) = mkBuiltinSrcLoc
+nameSrcLoc (Global _ _ _ (WiredInId _)) = mkBuiltinSrcLoc
+nameSrcLoc other = noSrcLoc
-isLocallyDefinedName (Local _ _ _) = True
-isLocallyDefinedName (Global _ _ _ _ (LocalDef _ _)) = True
-isLocallyDefinedName other = False
+isLocallyDefinedName (Local _ _) = True
+isLocallyDefinedName (Global _ _ _ (LocalDef _ _)) = True
+isLocallyDefinedName other = False
-- 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 (Global _ _ _ (WiredInTyCon _)) = True
+isWiredInName (Global _ _ _ (WiredInId _)) = True
+isWiredInName _ = False
maybeWiredInIdName :: Name -> Maybe Id
-maybeWiredInIdName (Global _ _ _ (WiredInId id) _) = Just id
-maybeWiredInIdName other = Nothing
+maybeWiredInIdName (Global _ _ _ (WiredInId id)) = Just id
+maybeWiredInIdName other = Nothing
maybeWiredInTyConName :: Name -> Maybe TyCon
-maybeWiredInTyConName (Global _ _ _ (WiredInTyCon tc) _) = Just tc
-maybeWiredInTyConName other = Nothing
+maybeWiredInTyConName (Global _ _ _ (WiredInTyCon tc)) = Just tc
+maybeWiredInTyConName other = Nothing
+
+isLocalName (Local _ _) = True
+isLocalName _ = False
-isLocalName (Local _ _ _) = True
-isLocalName _ = False
+isSysLocalName (Local _ Nothing) = True
+isSysLocalName other = False
+
+isGlobalName (Global _ _ _ _) = True
+isGlobalName other = False
+
+-- 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
\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_
+ c (Local u1 _) (Local u2 _) = compare u1 u2
+ c (Local _ _) _ = LT
+ c (Global u1 _ _ _) (Global u2 _ _ _) = compare u1 u2
+ c (Global _ _ _ _) _ = GT
\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}
+\subsection[Special-Names]{Special Kinds of names}
%* *
%************************************************************************
-\begin{code}
-instance Outputable Name where
- ppr sty (Local u n _) | codeStyle sty ||
- ifaceStyle sty = pprUnique u
- | otherwise = ppBesides [ppPStr (occNameString n), ppPStr SLIT("_"), pprUnique u]
+Here's our convention for splitting up the object file name space:
- ppr sty (Global u m n _ _) = ppBesides [pp_name, pp_uniq sty u]
- where
- pp_name | codeStyle sty = identToC qual_name
- | otherwise = ppPStr qual_name
- qual_name = m _APPEND_ SLIT(".") _APPEND_ occNameString n
+ _d... dictionary identifiers
+ _g... externally visible (non-user visible) names
-pp_uniq PprDebug uniq = ppBesides [ppStr "{-", pprUnique uniq, ppStr "-}"]
-pp_uniq other uniq = ppNil
+ _m... default methods
+ _n... default methods (encoded symbols, eg. <= becomes _nle)
--- pprNameProvenance is used in error messages to say where a name came from
-pprNameProvenance :: PprStyle -> Name -> Pretty
-pprNameProvenance sty (Local _ _ loc) = pprProvenance sty (LocalDef NotExported loc)
-pprNameProvenance sty (Global _ _ _ _ prov) = pprProvenance sty prov
-
-pprProvenance :: PprStyle -> Provenance -> Pretty
-pprProvenance sty (Imported mod loc)
- = ppSep [ppStr "Imported from", pprModule sty mod, ppStr "at", ppr sty loc]
-pprProvenance sty (LocalDef _ loc)
- = ppSep [ppStr "Defined at", ppr sty loc]
-pprProvenance sty Implicit
- = panic "pprNameProvenance: Implicit"
-\end{code}
+ _p... superclass selectors
+
+ _w... workers
+ _v... workers (encoded symbols)
+
+ _x... local variables
+ _u... user-defined names that previously began with '_'
+
+ _[A-Z]... compiler-generated tycons/datacons (namely dictionary
+ constructors)
+
+ __.... keywords (__export, __letrec etc.)
+
+This knowledge is encoded in the following functions.
+
+\begin{code}
+dictNamePrefix :: FAST_STRING
+dictNamePrefix = SLIT("_d")
+
+mkSuperDictSelName :: Int -> OccName -> OccName
+mkSuperDictSelName index = prefixOccName (_PK_ ("_p" ++ show index ++ "_"))
+
+mkWorkerName :: OccName -> OccName
+mkWorkerName nm
+ | isLexSym nm_str =
+ prefixOccName SLIT("_v") (mapOccName trName nm)
+ | otherwise =
+ prefixOccName SLIT("_w") nm
+ where nm_str = occNameString nm
+
+mkDefaultMethodName :: OccName -> OccName
+mkDefaultMethodName nm
+ | isLexSym nm_str =
+ prefixOccName SLIT("_n") (mapOccName trName nm)
+ | otherwise =
+ prefixOccName SLIT("_m") nm
+ where nm_str = occNameString nm
+
+-- not used yet:
+--mkRecordSelectorName :: Name -> Name
+--mkMethodSelectorName :: Name -> Name
+
+mkClassTyConStr, mkClassDataConStr :: FAST_STRING -> FAST_STRING
+
+mkClassTyConStr s = SLIT("_") _APPEND_ s
+mkClassDataConStr s = SLIT("_") _APPEND_ s
+
+-- translate a string such that it can occur as *part* of an identifer. This
+-- is used when we prefix identifiers to create new names, for example the
+-- name of a default method.
+
+trName :: FAST_STRING -> FAST_STRING
+trName nm = _PK_ (foldr tran "" (_UNPK_ nm))
+ where
+ tran c cs = case trChar c of
+ '\0' -> '_' : show (ord c) ++ cs
+ c' -> c' : cs
+ trChar '&' = 'a'
+ trChar '|' = 'b'
+ trChar ':' = 'c'
+ trChar '/' = 'd'
+ trChar '=' = 'e'
+ trChar '>' = 'g'
+ trChar '#' = 'h'
+ trChar '@' = 'i'
+ trChar '<' = 'l'
+ trChar '-' = 'm'
+ trChar '!' = 'n'
+ trChar '+' = 'p'
+ trChar '\'' = 'q'
+ trChar '$' = 'r'
+ trChar '?' = 's'
+ trChar '*' = 't'
+ trChar '_' = 'u'
+ trChar '.' = 'v'
+ trChar '\\' = 'w'
+ trChar '%' = 'x'
+ trChar '~' = 'y'
+ trChar '^' = 'z'
+ trChar _ = '\0'
+\end{code}
%************************************************************************
%* *
-\subsection[Sets of names}
+\subsection{Pretty printing}
%* *
%************************************************************************
\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]
-
-emptyNameSet = emptyUniqSet
-unitNameSet = unitUniqSet
-mkNameSet = mkUniqSet
-addListToNameSet = addListToUniqSet
-unionNameSets = unionUniqSets
-unionManyNameSets = unionManyUniqSets
-minusNameSet = minusUniqSet
-elemNameSet = elementOfUniqSet
-nameSetToList = uniqSetToList
-\end{code}
+instance Outputable Name where
+ -- When printing interfaces, all Locals have been given nice print-names
+ ppr name = pprName name
+
+pprName name
+ = getPprStyle $ \ sty ->
+ let
+ -- when printing local names for interface files, prepend the '_'
+ -- to avoid clashes with user-defined names. In fact, these names
+ -- will always begin with 'g' for top-level ids and 'x' otherwise,
+ -- because these are the unique supplies going into the tidy phase.
+ ppr (Local u n) | codeStyle sty = pprUnique u
+ | ifaceStyle sty = char '_' <> pprUnique u
+
+ ppr (Local u Nothing) = pprUnique u
+ ppr (Local u (Just occ)) | userStyle sty = ptext (occNameString occ)
+ | otherwise = ptext (occNameString occ) <> char '_' <> pprUnique u
+
+ ppr name@(Global u m n prov)
+ | codeStyle sty
+ = identToC (m _APPEND_ SLIT(".") _APPEND_ occNameString n)
+
+ | otherwise
+ = hcat [pp_mod_dot, ptext (occNameString n), pp_debug sty name]
+ where
+ pp_mod_dot
+ = case prov of -- Omit home module qualifier if in scope
+ LocalDef _ _ -> pp_qual dot (user_sty || iface_sty)
+ NonLocalDef _ hif omit -> pp_qual (pp_hif hif) (omit && user_sty)
+ -- Hack: omit qualifers on wired in things
+ -- in user style only
+ WiredInTyCon _ -> pp_qual dot user_sty
+ WiredInId _ -> pp_qual dot user_sty
+ NoProvenance -> pp_qual dot False
+
+ pp_qual sep omit_qual
+ | omit_qual = empty
+ | otherwise = pprModule m <> sep
+
+ dot = text "."
+ pp_hif HiFile = dot -- Vanilla case
+ pp_hif HiBootFile = text "!" -- M!t indicates a name imported from a .hi-boot interface
+
+ user_sty = userStyle sty
+ iface_sty = ifaceStyle sty
+ in
+ ppr name
+
+
+pp_debug sty (Global uniq m n prov)
+ | debugStyle sty = hcat [text "{-", pprUnique uniq, prov_p, text "-}"]
+ | otherwise = empty
+ where
+ prov_p | opt_PprStyle_NoPrags = empty
+ | otherwise = comma <> pp_prov prov
+
+pp_prov (LocalDef _ Exported) = char 'x'
+pp_prov (LocalDef _ NotExported) = char 'l'
+pp_prov (NonLocalDef _ _ _) = char 'n'
+pp_prov (WiredInTyCon _) = char 'W'
+pp_prov (WiredInId _) = char 'w'
+pp_prov NoProvenance = char '?'
+-- pprNameProvenance is used in error messages to say where a name came from
+pprNameProvenance :: Name -> SDoc
+pprNameProvenance (Local _ _) = pprProvenance (LocalDef noSrcLoc NotExported)
+pprNameProvenance (Global _ _ _ prov) = pprProvenance prov
+
+pprProvenance :: Provenance -> SDoc
+pprProvenance (LocalDef loc _) = ptext SLIT("Locally defined at") <+> ppr loc
+pprProvenance (NonLocalDef loc _ _) = ptext SLIT("Non-locally defined at") <+> ppr loc
+pprProvenance (WiredInTyCon tc) = ptext SLIT("Wired-in tycon")
+pprProvenance (WiredInId id) = ptext SLIT("Wired-in id")
+pprProvenance NoProvenance = ptext SLIT("No provenance")
+\end{code}
%************************************************************************
isExported = isExportedName . getName
getSrcLoc = nameSrcLoc . getName
isLocallyDefined = isLocallyDefinedName . getName
-pprSym sty = pprSymOcc sty . getOccName
-pprNonSym sty = pprNonSymOcc sty . getOccName
getOccString x = _UNPK_ (occNameString (getOccName x))
\end{code}
projects / ghc-hetmet.git / blobdiff