%
-% (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}
Module,
pprModule, moduleString,
+ -- The basic form of names
+ isLexCon, isLexVar, isLexId, isLexSym,
+ isLexConId, isLexConSym, isLexVarId, isLexVarSym,
+ mkTupNameStr, mkUbxTupNameStr, isLowerISO, isUpperISO,
+
-- The OccName type
- OccName(..),
+ OccName(..), varOcc,
pprOccName, occNameString, occNameFlavour,
isTvOcc, isTCOcc, isVarOcc, prefixOccName,
- uniqToOccName,
-- The Name type
Name, -- Abstract
nameUnique, changeUnique, setNameProvenance, getNameProvenance,
setNameVisibility, mkNameVisible,
- nameOccName, nameString, nameModule,
+ nameOccName, nameModule,
isExportedName, nameSrcLoc,
isLocallyDefinedName,
- isLocalName,
+ isSysLocalName, isLocalName, isGlobalName, isExternallyVisibleName,
pprNameProvenance,
- -- Sets of Names
- NameSet,
- emptyNameSet, unitNameSet, mkNameSet, unionNameSets, unionManyNameSets,
- minusNameSet, elemNameSet, nameSetToList, addOneToNameSet, addListToNameSet, isEmptyNameSet,
+ -- Special Names
+ dictNamePrefix, mkSuperDictSelName, mkWorkerName,
+ mkDefaultMethodName, mkClassTyConStr, mkClassDataConStr,
-- Misc
Provenance(..), pprProvenance,
#include "HsVersions.h"
-import {-# SOURCE #-} Id ( Id )
+import {-# SOURCE #-} Var ( Id )
import {-# SOURCE #-} TyCon ( TyCon )
import CStrings ( identToC )
-import CmdLineOpts ( opt_PprStyle_All, opt_OmitInterfacePragmas, opt_EnsureSplittableC )
+import PrelMods ( pREL_BASE, pREL_TUP, pREL_GHC )
+import CmdLineOpts ( opt_PprStyle_NoPrags, opt_OmitInterfacePragmas, opt_EnsureSplittableC )
import BasicTypes ( Module, IfaceFlavour(..), moduleString, pprModule )
-import Lex ( isLexConId )
import SrcLoc ( noSrcLoc, mkBuiltinSrcLoc, SrcLoc )
-import Unique ( pprUnique, showUnique, Unique, Uniquable(..) )
-import UniqSet ( UniqSet,
- emptyUniqSet, unitUniqSet, unionUniqSets, uniqSetToList,
- isEmptyUniqSet, unionManyUniqSets, minusUniqSet, mkUniqSet,
- elementOfUniqSet, addListToUniqSet, addOneToUniqSet
- )
-import UniqFM ( UniqFM )
+import Unique ( pprUnique, Unique, Uniquable(..) )
import Outputable
+import Char ( isUpper, isLower, ord )
+import Util ( nOfThem )
+import GlaExts
+\end{code}
+
+
+%************************************************************************
+%* *
+\subsection{Lexical categories}
+%* *
+%************************************************************************
+
+These functions test strings to see if they fit the lexical categories
+defined in the Haskell report.
+
+\begin{code}
+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}
then identToC (occNameString n)
else ptext (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)
\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
| NonLocalDef -- Defined non-locally
SrcLoc -- Defined non-locally; src-loc gives defn site
- IfaceFlavour -- Whether the defn site is an .hi-boot file or not
+ 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
+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 -> 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 (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 prov)
- = Global uniq mod new_occ 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))
+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 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
getNameProvenance :: Name -> Provenance
getNameProvenance (Global uniq mod occ prov) = prov
-getNameProvenance (Local uniq occ locn) = LocalDef locn NotExported
+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 (Local _ n ) u = Local u n
changeUnique (Global _ mod occ prov) u = Global u mod occ prov
\end{code}
\begin{code}
setNameVisibility :: Maybe Module -> Unique -> Name -> Name
-setNameVisibility maybe_mod occ_uniq name@(Global uniq mod occ (LocalDef loc NotExported))
+setNameVisibility maybe_mod uniq name@(Global _ mod occ (LocalDef loc NotExported))
| not all_toplev_ids_visible || not_top_level maybe_mod
- = Local uniq (uniqToOccName occ_uniq) loc -- Localise Global name
+ = Local uniq Nothing -- Localise Global name
-setNameVisibility maybe_mod occ_uniq name@(Global _ _ _ _)
+setNameVisibility maybe_mod uniq name@(Global _ _ _ _)
= name -- Otherwise don't fiddle with Global
-setNameVisibility (Just mod) occ_uniq (Local uniq occ loc)
+setNameVisibility (Just mod) uniq (Local _ _)
| all_toplev_ids_visible
= Global uniq mod -- Globalise Local name
- (uniqToOccName occ_uniq)
- (LocalDef loc NotExported)
+ (uniqToOccName uniq)
+ (LocalDef noSrcLoc NotExported)
-setNameVisibility maybe_mod occ_uniq (Local uniq occ loc)
- = Local uniq (uniqToOccName occ_uniq) loc -- New OccName for Local
+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 loc)
- = Global uniq mod (uniqToOccName occ_uniq) (LocalDef loc Exported)
-
+mkNameVisible mod occ_uniq nm@(Local uniq occ)
+ = Global uniq mod (uniqToOccName occ_uniq) (LocalDef noSrcLoc Exported)
-uniqToOccName uniq = VarOcc (_PK_ ('$':showUnique uniq))
- -- The "$" is to make sure that this OccName is distinct from all user-defined ones
+uniqToOccName uniq = VarOcc (_PK_ ('_':show uniq))
+ -- The "_" is to make sure that this OccName is distinct from all user-defined ones
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
+all_toplev_ids_visible =
+ not opt_OmitInterfacePragmas || -- Pragmas can make them visible
+ opt_EnsureSplittableC -- Splitting requires visiblilty
\end{code}
%************************************************************************
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 (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
nameModule (Global _ mod occ _) = mod
nameModAndOcc (Global _ mod occ _) = (mod,occ)
-nameString (Local _ occ _) = occNameString occ
-nameString (Global _ mod occ _) = mod _APPEND_ SLIT(".") _APPEND_ occNameString occ
-
isExportedName (Global _ _ _ (LocalDef _ Exported)) = True
isExportedName other = False
-nameSrcLoc (Local _ _ loc) = loc
+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 (Local _ _) = True
isLocallyDefinedName (Global _ _ _ (LocalDef _ _)) = True
isLocallyDefinedName other = False
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 _ _) = compare u1 u2
- c (Local _ _ _) _ = LT
+ c (Local u1 _) (Local u2 _) = compare u1 u2
+ c (Local _ _) _ = LT
c (Global u1 _ _ _) (Global u2 _ _ _) = compare u1 u2
c (Global _ _ _ _) _ = GT
\end{code}
compare a b = cmpName a b
instance Uniquable Name where
- uniqueOf = nameUnique
+ getUnique = nameUnique
instance NamedThing Name where
getName n = n
\end{code}
+%************************************************************************
+%* *
+\subsection[Special-Names]{Special Kinds of names}
+%* *
+%************************************************************************
+
+Here's our convention for splitting up the object file name space:
+
+ _d... dictionary identifiers
+ _g... externally visible (non-user visible) names
+
+ _m... default methods
+ _n... default methods (encoded symbols, eg. <= becomes _nle)
+
+ _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}
%************************************************************************
%* *
pprName name
= getPprStyle $ \ sty ->
let
- ppr (Local u n _)
- | userStyle sty
- || ifaceStyle sty = ptext (occNameString n)
- | codeStyle sty = pprUnique u
- | otherwise = hcat [ptext (occNameString n), ptext SLIT("_"), pprUnique u]
+ -- 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
= hcat [pp_mod_dot, ptext (occNameString n), pp_debug sty name]
where
pp_mod_dot
- = case prov of -- Omit home module qualifier if its in scope
- LocalDef _ _ -> pp_qual dot (user_sty || iface_sty)
- NonLocalDef _ hif omit -> pp_qual (pp_hif hif) (omit && user_sty)
- WiredInTyCon _ -> pp_qual dot user_sty -- Hack: omit qualifers on wired in things
- WiredInId _ -> pp_qual dot user_sty -- in user style only
- NoProvenance -> pp_qual dot False
+ = 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
| debugStyle sty = hcat [text "{-", pprUnique uniq, prov_p, text "-}"]
| otherwise = empty
where
- prov_p | opt_PprStyle_All = comma <> pp_prov prov
- | otherwise = empty
+ prov_p | opt_PprStyle_NoPrags = empty
+ | otherwise = comma <> pp_prov prov
pp_prov (LocalDef _ Exported) = char 'x'
pp_prov (LocalDef _ NotExported) = char 'l'
-- pprNameProvenance is used in error messages to say where a name came from
pprNameProvenance :: Name -> SDoc
-pprNameProvenance (Local _ _ loc) = pprProvenance (LocalDef loc NotExported)
+pprNameProvenance (Local _ _) = pprProvenance (LocalDef noSrcLoc NotExported)
pprNameProvenance (Global _ _ _ prov) = pprProvenance prov
pprProvenance :: Provenance -> SDoc
%************************************************************************
%* *
-\subsection[Sets of names}
-%* *
-%************************************************************************
-
-\begin{code}
-type NameSet = UniqSet Name
-emptyNameSet :: NameSet
-unitNameSet :: Name -> NameSet
-addListToNameSet :: NameSet -> [Name] -> NameSet
-addOneToNameSet :: 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
-addOneToNameSet = addOneToUniqSet
-unionNameSets = unionUniqSets
-unionManyNameSets = unionManyUniqSets
-minusNameSet = minusUniqSet
-elemNameSet = elementOfUniqSet
-nameSetToList = uniqSetToList
-\end{code}
-
-
-
-%************************************************************************
-%* *
\subsection{Overloaded functions related to Names}
%* *
%************************************************************************
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