\begin{code}
module OccName (
+ mk_deriv,
-- * The NameSpace type; abstact
NameSpace, tcName, clsName, tcClsName, dataName, varName,
tvName, srcDataName,
setOccNameSpace,
-- ** Derived OccNames
+ isDerivedOccName,
mkDataConWrapperOcc, mkWorkerOcc, mkDefaultMethodOcc,
- mkDerivedTyConOcc, mkNewTyCoOcc,
+ mkDerivedTyConOcc, mkNewTyCoOcc,
+ mkCon2TagOcc, mkTag2ConOcc, mkMaxTagOcc,
mkClassTyConOcc, mkClassDataConOcc, mkDictOcc, mkIPOcc,
mkSpecOcc, mkForeignExportOcc, mkGenOcc1, mkGenOcc2,
mkDataTOcc, mkDataCOcc, mkDataConWorkerOcc,
This knowledge is encoded in the following functions.
-
@mk_deriv@ generates an @OccName@ from the prefix and a string.
NB: The string must already be encoded!
-> OccName
mk_deriv occ_sp sys_prefix str = mkOccName occ_sp (sys_prefix ++ str)
+
+isDerivedOccName :: OccName -> Bool
+isDerivedOccName occ =
+ case occNameString occ of
+ '$':c:_ | isAlphaNum c -> True
+ ':':c:_ | isAlphaNum c -> True
+ _other -> False
\end{code}
\begin{code}
mkClassTyConOcc, mkClassDataConOcc, mkDictOcc, mkIPOcc,
mkSpecOcc, mkForeignExportOcc, mkGenOcc1, mkGenOcc2,
mkDataTOcc, mkDataCOcc, mkDataConWorkerOcc, mkNewTyCoOcc,
- mkInstTyCoOcc, mkEqPredCoOcc,
+ mkInstTyCoOcc, mkEqPredCoOcc,
+ mkCon2TagOcc, mkTag2ConOcc, mkMaxTagOcc,
mkVectOcc, mkVectTyConOcc, mkVectDataConOcc, mkVectIsoOcc,
mkPArrayTyConOcc, mkPArrayDataConOcc, mkPReprTyConOcc, mkPADFunOcc
:: OccName -> OccName
mkInstTyCoOcc = mk_simple_deriv tcName ":CoF" -- derived from rep ty
mkEqPredCoOcc = mk_simple_deriv tcName "$co"
+-- used in derived instances
+mkCon2TagOcc = mk_simple_deriv varName "$con2tag_"
+mkTag2ConOcc = mk_simple_deriv varName "$tag2con_"
+mkMaxTagOcc = mk_simple_deriv varName "$maxtag_"
+
-- Generic derivable classes
mkGenOcc1 = mk_simple_deriv varName "$gfrom"
mkGenOcc2 = mk_simple_deriv varName "$gto"