OccName, -- Abstract, instance of Outputable
pprOccName,
- mkOccFS, mkSysOcc, mkSysOccFS, mkCCallOcc, mkVarOcc, mkKindOccFS,
+ mkOccFS, mkSysOcc, mkSysOccFS, mkFCallOcc, mkVarOcc, mkKindOccFS,
mkSuperDictSelOcc, mkDFunOcc, mkForeignExportOcc,
mkDictOcc, mkIPOcc, mkWorkerOcc, mkMethodOcc, mkDefaultMethodOcc,
mkDerivedTyConOcc, mkClassTyConOcc, mkClassDataConOcc, mkSpecOcc,
- mkGenOcc1, mkGenOcc2,
+ mkGenOcc1, mkGenOcc2, mkLocalOcc,
- isTvOcc, isDataOcc, isDataSymOcc, isSymOcc, isValOcc,
+ isTvOcc, isTcOcc, isDataOcc, isDataSymOcc, isSymOcc, isValOcc,
occNameFS, occNameString, occNameUserString, occNameSpace, occNameFlavour,
setOccNameSpace,
import Char ( isDigit, isUpper, isLower, ISALPHANUM, ord, chr, digitToInt )
import Util ( thenCmp )
+import Unique ( Unique )
import FiniteMap ( FiniteMap, emptyFM, lookupFM, addToFM, elemFM )
import Outputable
import GlaExts
mkSysOccFS occ_sp fs = ASSERT2( alreadyEncodedFS fs, ppr fs )
OccName occ_sp fs
-mkCCallOcc :: EncodedString -> OccName
+mkFCallOcc :: EncodedString -> OccName
-- This version of mkSysOcc doesn't check that the string is already encoded,
-- because it will be something like "{__ccall f dyn Int# -> Int#}"
-- This encodes a lot into something that then parses like an Id.
-- But then alreadyEncoded complains about the braces!
-mkCCallOcc str = OccName varName (_PK_ str)
+mkFCallOcc str = OccName varName (_PK_ str)
-- Kind constructors get a special function. Uniquely, they are not encoded,
-- so that they have names like '*'. This means that *even in interface files*
\end{code}
\begin{code}
-isTvOcc, isDataSymOcc, isSymOcc :: OccName -> Bool
+isTvOcc, isDataSymOcc, isSymOcc, isTcOcc :: OccName -> Bool
isTvOcc (OccName TvName _) = True
isTvOcc other = False
+isTcOcc (OccName TcClsName _) = True
+isTcOcc other = False
+
isValOcc (OccName VarName _) = True
isValOcc (OccName DataName _) = True
isValOcc other = False
$dm... default methods
$p... superclass selectors
$w... workers
- $T... compiler-generated tycons for dictionaries
- $D... ...ditto data cons
+ :T... compiler-generated tycons for dictionaries
+ :D... ...ditto data cons
$sf.. specialised version of f
in encoded form these appear as Zdfxxx etc
:... keywords (export:, letrec: etc.)
+--- I THINK THIS IS WRONG!
This knowledge is encoded in the following functions.
-@mk_deriv@ generates an @OccName@ from the one-char prefix and a string.
+@mk_deriv@ generates an @OccName@ from the prefix and a string.
NB: The string must already be encoded!
\begin{code}
mk_deriv :: NameSpace
-> String -- Distinguishes one sort of derived name from another
-> EncodedString -- Must be already encoded!! We don't want to encode it a
- -- second time because encoding isn't itempotent
+ -- second time because encoding isn't idempotent
-> OccName
mk_deriv occ_sp sys_prefix str = mkSysOcc occ_sp (encode sys_prefix ++ str)
:: OccName -> OccName
-- These derived variables have a prefix that no Haskell value could have
-mkWorkerOcc = mk_simple_deriv varName "$w"
-mkDefaultMethodOcc = mk_simple_deriv varName "$dm"
-mkDerivedTyConOcc = mk_simple_deriv tcName ":" -- The : prefix makes sure it classifies
-mkClassTyConOcc = mk_simple_deriv tcName ":T" -- as a tycon/datacon
-mkClassDataConOcc = mk_simple_deriv dataName ":D" --
-mkDictOcc = mk_simple_deriv varName "$d"
-mkIPOcc = mk_simple_deriv varName "$i"
-mkSpecOcc = mk_simple_deriv varName "$s"
-mkForeignExportOcc = mk_simple_deriv varName "$f"
+mkWorkerOcc = mk_simple_deriv varName "$w"
+mkDefaultMethodOcc = mk_simple_deriv varName "$dm"
+mkDerivedTyConOcc = mk_simple_deriv tcName ":" -- The : prefix makes sure it classifies
+mkClassTyConOcc = mk_simple_deriv tcName ":T" -- as a tycon/datacon
+mkClassDataConOcc = mk_simple_deriv dataName ":D" --
+mkDictOcc = mk_simple_deriv varName "$d"
+mkIPOcc = mk_simple_deriv varName "$i"
+mkSpecOcc = mk_simple_deriv varName "$s"
+mkForeignExportOcc = mk_simple_deriv varName "$f"
mkGenOcc1 = mk_simple_deriv varName "$gfrom" -- Generics
mkGenOcc2 = mk_simple_deriv varName "$gto" -- Generics
mk_simple_deriv sp px occ = mk_deriv sp px (occNameString occ)
\begin{code}
mkSuperDictSelOcc :: Int -- Index of superclass, eg 3
-> OccName -- Class, eg "Ord"
- -> OccName -- eg "p3Ord"
+ -> OccName -- eg "$p3Ord"
mkSuperDictSelOcc index cls_occ
= mk_deriv varName "$p" (show index ++ occNameString cls_occ)
+
+mkLocalOcc :: Unique -- Unique
+ -> OccName -- Local name (e.g. "sat")
+ -> OccName -- Nice unique version ("$L23sat")
+mkLocalOcc uniq occ
+ = mk_deriv varName ("$L" ++ show uniq) (occNameString occ)
+ -- The Unique might print with characters
+ -- that need encoding (e.g. 'z'!)
\end{code}
foo## foozhzh
foo##1 foozhzh1
fooZ fooZZ
- :+ Zczp
- () Z0T
- (,,,,) Z4T 5-tuple
- (#,,,,#) Z4H unboxed 5-tuple
- (NB: the number is one different to the number of
- elements. No real reason except that () is a zero-tuple,
- while (,) is a 2-tuple.)
+ :+ ZCzp
+ () Z0T 0-tuple
+ (,,,,) Z5T 5-tuple
+ (# #) Z1H unboxed 1-tuple (note the space)
+ (#,,,,#) Z5H unboxed 5-tuple
+ (NB: There is no Z1T nor Z0H.)
\begin{code}
-- alreadyEncoded is used in ASSERTs to check for encoded
go [] = []
go (c:cs) = encode_ch c ++ go cs
+maybe_tuple "(# #)" = Just("Z1H")
maybe_tuple ('(' : '#' : cs) = case count_commas (0::Int) cs of
- (n, '#' : ')' : cs) -> Just ('Z' : shows n "H")
+ (n, '#' : ')' : cs) -> Just ('Z' : shows (n+1) "H")
other -> Nothing
+maybe_tuple "()" = Just("Z0T")
maybe_tuple ('(' : cs) = case count_commas (0::Int) cs of
- (n, ')' : cs) -> Just ('Z' : shows n "T")
+ (n, ')' : cs) -> Just ('Z' : shows (n+1) "T")
other -> Nothing
maybe_tuple other = Nothing
unencodedChar :: Char -> Bool -- True for chars that don't need encoding
unencodedChar 'Z' = False
unencodedChar 'z' = False
-unencodedChar c = ISALPHANUM c
+unencodedChar c = c >= 'a' && c <= 'z'
+ || c >= 'A' && c <= 'Z'
+ || c >= '0' && c <= '9'
encode_ch :: Char -> EncodedString
encode_ch c | unencodedChar c = [c] -- Common case first
| isDigit c = go (digitToInt c) rest
where
go n (c : rest) | isDigit c = go (10*n + digitToInt c) rest
- go n ('T' : rest) = '(' : replicate n ',' ++ ')' : decode rest
- go n ('H' : rest) = '(' : '#' : replicate n ',' ++ '#' : ')' : decode rest
+ go 0 ('T' : rest) = "()" ++ (decode rest)
+ go n ('T' : rest) = '(' : replicate (n-1) ',' ++ ')' : decode rest
+ go 1 ('H' : rest) = "(# #)" ++ (decode rest)
+ go n ('H' : rest) = '(' : '#' : replicate (n-1) ',' ++ '#' : ')' : decode rest
go n ('U' : rest) = chr n : decode rest
go n other = pprPanic "decode_escape" (ppr n <+> text (c:rest))
%************************************************************************
%* *
-n\subsection{Lexical categories}
+\subsection{Lexical categories}
%* *
%************************************************************************
projects / ghc-hetmet.git / blobdiff