\begin{code}
module OccName (
- -- Modules
- Module, -- Abstract, instance of Outputable
- mkSrcModule, mkSrcModuleFS, mkSysModuleFS, mkImportModuleFS, mkBootModule, mkIfaceModuleFS,
- moduleString, moduleUserString, moduleIfaceFlavour,
- pprModule, pprModuleSep, pprModuleBoot,
-
- -- IfaceFlavour
- IfaceFlavour,
- hiFile, hiBootFile, bootFlavour,
-
-- The NameSpace type; abstact
NameSpace, tcName, clsName, tcClsName, dataName, varName, tvName,
- nameSpaceString,
+ uvName, nameSpaceString,
-- The OccName type
OccName, -- Abstract, instance of Outputable
mkSrcOccFS, mkSysOcc, mkSysOccFS, mkSrcVarOcc, mkKindOccFS,
mkSuperDictSelOcc, mkDFunOcc, mkForeignExportOcc,
mkDictOcc, mkWorkerOcc, mkMethodOcc, mkDefaultMethodOcc,
- mkClassTyConOcc, mkClassDataConOcc, mkSpecOcc,
+ mkDerivedTyConOcc, mkClassTyConOcc, mkClassDataConOcc, mkSpecOcc,
- isTvOcc, isDataOcc, isDataSymOcc, isSymOcc,
+ isTvOcc, isUvOcc, isDataOcc, isDataSymOcc, isSymOcc,
occNameFS, occNameString, occNameUserString, occNameSpace, occNameFlavour,
setOccNameSpace,
TidyOccEnv, emptyTidyOccEnv, tidyOccName, initTidyOccEnv,
-- Encoding
- EncodedString, EncodedFS, UserString, UserFS, encode, encodeFS, decode,
+ EncodedString, EncodedFS, UserString, UserFS, encode, encodeFS, decode, pprEncodedFS,
-- The basic form of names
isLexCon, isLexVar, isLexId, isLexSym,
These type synonyms help documentation.
\begin{code}
-type UserFS = FAST_STRING -- As the user typed it
+type UserFS = FAST_STRING -- As the user typed it
type EncodedFS = FAST_STRING -- Encoded form
type UserString = String -- As the user typed it
ptext fs
\end{code}
-
-%************************************************************************
-%* *
-\subsection{Interface file flavour}
-%* *
-%************************************************************************
-
-The IfaceFlavour type is used mainly in an imported Name's Provenance
-to say whether the name comes from a regular .hi file, or whether it comes
-from a hand-written .hi-boot file. This is important, because it has to be
-propagated. Suppose
-
- C.hs imports B
- B.hs imports A
- A.hs imports C {-# SOURCE -#} ( f )
-
-Then in A.hi we may mention C.f, in an inlining. When compiling B we *must not*
-read C.f's details from C.hi, even if the latter happens to exist from an earlier
-compilation run. So we use the name "C!f" in A.hi, and when looking for an interface
-file with details of C!f we look in C.hi-boot. The "!" stuff is recorded in the
-IfaceFlavour in the Module of C.f in A.
-
-Not particularly beautiful, but it works.
-
-\begin{code}
-data IfaceFlavour = HiFile -- The thing comes from a standard interface file
- -- or from the source file itself
- | HiBootFile -- ... or from a handwritten "hi-boot" interface file
- deriving( Eq )
-
-hiFile = HiFile
-hiBootFile = HiBootFile
-
-instance Text IfaceFlavour where -- Just used in debug prints of lex tokens
- showsPrec n HiFile s = s
- showsPrec n HiBootFile s = "!" ++ s
-
-bootFlavour :: IfaceFlavour -> Bool
-bootFlavour HiBootFile = True
-bootFlavour HiFile = False
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection[Module]{The name of a module}
-%* *
-%************************************************************************
-
-\begin{code}
-data Module = Module
- EncodedFS
- IfaceFlavour
- -- Haskell module names can include the quote character ',
- -- so the module names have the z-encoding applied to them
-\end{code}
-
-\begin{code}
-instance Outputable Module where
- ppr = pprModule
-
--- Ignore the IfaceFlavour when comparing modules
-instance Eq Module where
- (Module m1 _) == (Module m2 _) = m1 == m2
-
-instance Ord Module where
- (Module m1 _) `compare` (Module m2 _) = m1 `compare` m2
-\end{code}
-
-
-\begin{code}
-pprModule :: Module -> SDoc
-pprModule (Module mod _) = pprEncodedFS mod
-
-pprModuleSep, pprModuleBoot :: Module -> SDoc
-pprModuleSep (Module mod HiFile) = dot
-pprModuleSep (Module mod HiBootFile) = char '!'
-
-pprModuleBoot (Module mod HiFile) = empty
-pprModuleBoot (Module mod HiBootFile) = char '!'
-\end{code}
-
-
-\begin{code}
-mkSrcModule :: UserString -> Module
-mkSrcModule s = Module (_PK_ (encode s)) HiFile
-
-mkSrcModuleFS :: UserFS -> Module
-mkSrcModuleFS s = Module (encodeFS s) HiFile
-
-mkImportModuleFS :: UserFS -> IfaceFlavour -> Module
-mkImportModuleFS s hif = Module (encodeFS s) hif
-
-mkSysModuleFS :: EncodedFS -> IfaceFlavour -> Module
-mkSysModuleFS s hif = Module s hif
-
-mkIfaceModuleFS :: EncodedFS -> Module
-mkIfaceModuleFS s = Module s HiFile
-
-mkBootModule :: Module -> Module
-mkBootModule (Module s _) = Module s HiBootFile
-
-moduleString :: Module -> EncodedString
-moduleString (Module mod _) = _UNPK_ mod
-
-moduleUserString :: Module -> UserString
-moduleUserString (Module mod _) = decode (_UNPK_ mod)
-
-moduleIfaceFlavour :: Module -> IfaceFlavour
-moduleIfaceFlavour (Module _ hif) = hif
-\end{code}
-
-
%************************************************************************
%* *
\subsection{Name space}
data NameSpace = VarName -- Variables
| DataName -- Data constructors
| TvName -- Type variables
+ | UvName -- Usage variables
| TcClsName -- Type constructors and classes; Haskell has them
-- in the same name space for now.
deriving( Eq, Ord )
dataName = DataName
tvName = TvName
+uvName = UvName
varName = VarName
nameSpaceString DataName = "Data constructor"
nameSpaceString VarName = "Variable"
nameSpaceString TvName = "Type variable"
+nameSpaceString UvName = "Usage variable"
nameSpaceString TcClsName = "Type constructor or class"
\end{code}
\end{code}
\begin{code}
-isTvOcc, isDataSymOcc, isSymOcc :: OccName -> Bool
+isTvOcc, isDataSymOcc, isSymOcc, isUvOcc :: OccName -> Bool
isTvOcc (OccName TvName _) = True
isTvOcc other = False
+isUvOcc (OccName UvName _) = True
+isUvOcc other = False
+
-- Data constructor operator (starts with ':', or '[]')
-- Pretty inefficient!
isDataSymOcc (OccName DataName s) = isLexConSym (decodeFS s)
(local variables, so no name-clash worries)
$f... dict-fun identifiers (from inst decls)
- $m... default methods
+ $dm... default methods
$p... superclass selectors
$w... workers
$T... compiler-generated tycons for dictionaries
-- These derived variables have a prefix that no Haskell value could have
mkWorkerOcc = mk_simple_deriv varName "$w"
mkDefaultMethodOcc = mk_simple_deriv varName "$dm"
-mkClassTyConOcc = mk_simple_deriv tcName ":T" -- The : prefix makes sure it classifies
-mkClassDataConOcc = mk_simple_deriv dataName ":D" -- as a tycon/datacon
+mkDerivedTyConOcc = mk_simple_deriv tcName ":" -- The : prefix makes sure it classifies
+mkClassTyConOcc = mk_simple_deriv tcName ":T" -- as a tycon/datacon
+mkClassDataConOcc = mk_simple_deriv dataName ":D" --
mkDictOcc = mk_simple_deriv varName "$d"
mkSpecOcc = mk_simple_deriv varName "$s"
mkForeignExportOcc = mk_simple_deriv varName "$f"
\begin{code}
-mkDFunOcc :: OccName -- class, eg "Ord"
- -> OccName -- tycon (or something convenient from the instance type)
- -- eg "Maybe"
- -> Int -- Unique to distinguish dfuns which share the previous two
- -- eg 3
- -> OccName -- "dOrdMaybe3"
-
-mkDFunOcc cls_occ tycon_occ index
- = mk_deriv VarName "$f" (show_index ++ cls_str ++ tycon_str)
+mkDFunOcc :: EncodedString -- Typically the class and type glommed together e.g. "OrdMaybe"
+ -> Int -- Unique to distinguish dfuns which share the previous two
+ -- eg 3
+ -- The requirement is that the (string,index) pair be unique in this module
+
+ -> OccName -- "$fOrdMaybe3"
+
+mkDFunOcc string index
+ = mk_deriv VarName "$f" (show_index ++ string)
where
- cls_str = occNameString cls_occ
- tycon_str = occNameString tycon_occ
show_index | index == 0 = ""
| otherwise = show index
\end{code}
go (c:cs) = encode_ch c ++ go cs
-- ToDo: Unboxed tuples too, perhaps?
-maybe_tuple ('(' : cs) = check_tuple 0 cs
+maybe_tuple ('(' : cs) = check_tuple (0::Int) cs
maybe_tuple other = Nothing
+check_tuple :: Int -> String -> Maybe Int
check_tuple n (',' : cs) = check_tuple (n+1) cs
check_tuple n ")" = Just n
check_tuple n other = Nothing
encode_ch '\\' = "zr"
encode_ch '/' = "zs"
encode_ch '*' = "zt"
+encode_ch '^' = "zu"
+encode_ch '%' = "zv"
encode_ch c = ['z', 'x', intToDigit hi, intToDigit lo]
where
(hi,lo) = ord c `quotRem` 16
decode_escape ('r' : rest) = '\\' : decode rest
decode_escape ('s' : rest) = '/' : decode rest
decode_escape ('t' : rest) = '*' : decode rest
+decode_escape ('u' : rest) = '^' : decode rest
+decode_escape ('v' : rest) = '%' : decode rest
decode_escape ('x' : d1 : d2 : rest) = chr (digitToInt d1 * 16 + digitToInt d2) : decode rest
-- Tuples are coded as Z23T
projects / ghc-hetmet.git / blobdiff