%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[PrelInfo]{The @PrelInfo@ interface to the compiler's prelude knowledge}
\begin{code}
-#include "HsVersions.h"
-
module PrelInfo (
- -- finite maps for built-in things (for the renamer and typechecker):
- builtinNames, derivingOccurrences,
- SYN_IE(BuiltinNames),
-
- maybeCharLikeTyCon, maybeIntLikeTyCon,
+ module MkId,
- eq_RDR, ne_RDR, le_RDR, lt_RDR, ge_RDR, gt_RDR, max_RDR, min_RDR, compare_RDR,
- minBound_RDR, maxBound_RDR, enumFrom_RDR, enumFromTo_RDR, enumFromThen_RDR,
- enumFromThenTo_RDR, fromEnum_RDR,
- range_RDR, index_RDR, inRange_RDR, readsPrec_RDR, readList_RDR,
- showsPrec_RDR, showList_RDR, plus_RDR, times_RDR, ltTag_RDR, eqTag_RDR, gtTag_RDR,
- eqH_Char_RDR, ltH_Char_RDR, eqH_Word_RDR, ltH_Word_RDR, eqH_Addr_RDR, ltH_Addr_RDR,
- eqH_Float_RDR, ltH_Float_RDR, eqH_Double_RDR, ltH_Double_RDR, eqH_Int_RDR, ltH_Int_RDR,
- geH_RDR, leH_RDR, minusH_RDR, false_RDR, true_RDR, and_RDR, not_RDR, append_RDR,
- map_RDR, compose_RDR, mkInt_RDR, error_RDR, showString_RDR, showParen_RDR, readParen_RDR,
- lex_RDR, showSpace_RDR, showList___RDR, readList___RDR, negate_RDR,
+ ghcPrimExports,
+ wiredInThings, basicKnownKeyNames,
+ primOpId,
+
+ -- Random other things
+ maybeCharLikeCon, maybeIntLikeCon,
- numClass_RDR, fractionalClass_RDR, eqClass_RDR, ccallableClass_RDR, creturnableClass_RDR,
- monadZeroClass_RDR, enumClass_RDR, evalClass_RDR, ordClass_RDR,
+ -- Class categories
+ isNumericClass, isStandardClass
- main_NAME, mainPrimIO_NAME, ioTyCon_NAME, primIoTyCon_NAME,
-
- needsDataDeclCtxtClassKeys, cCallishClassKeys, isNoDictClass,
- isNumericClass, isStandardClass, isCcallishClass
) where
-IMP_Ubiq()
-IMPORT_DELOOPER(PrelLoop) ( primOpName )
--- IMPORT_DELOOPER(IdLoop) ( SpecEnv )
-
--- friends:
-import PrelMods -- Prelude module names
-import PrelVals -- VALUES
-import PrimOp ( PrimOp(..), allThePrimOps )
-import PrimRep ( PrimRep(..) )
-import TysPrim -- TYPES
-import TysWiredIn
+#include "HsVersions.h"
--- others:
-import SpecEnv ( SpecEnv )
-import RdrHsSyn ( RdrName(..), varQual, tcQual, qual )
-import Id ( GenId, SYN_IE(Id) )
-import Name ( Name, OccName(..), DefnInfo(..), Provenance(..),
- getName, mkGlobalName, modAndOcc )
-import Class ( Class(..), GenClass, classKey )
-import TyCon ( tyConDataCons, mkFunTyCon, TyCon )
-import Type
-import Bag
-import Unique -- *Key stuff
-import UniqFM ( UniqFM, listToUFM )
+import PrelNames ( basicKnownKeyNames,
+ hasKey, charDataConKey, intDataConKey,
+ numericClassKeys, standardClassKeys )
+
+import PrimOp ( PrimOp, allThePrimOps, primOpOcc, primOpTag, maxPrimOpTag )
+import DataCon ( DataCon )
+import Id ( Id, idName )
+import MkId ( mkPrimOpId, wiredInIds )
+import MkId -- All of it, for re-export
+import Name ( nameOccName )
+import TysPrim ( primTyCons )
+import TysWiredIn ( wiredInTyCons )
+import HscTypes ( TyThing(..), implicitTyThings, GenAvailInfo(..), RdrAvailInfo )
+import Class ( Class, classKey )
+import Type ( funTyCon )
+import TyCon ( tyConName )
import Util ( isIn )
+
+import Array ( Array, array, (!) )
\end{code}
%************************************************************************
@Classes@, the other to look up values.
\begin{code}
-type BuiltinNames = Bag Name
-
-builtinNames :: BuiltinNames
-builtinNames
- = -- Wired in TyCons
- unionManyBags (map getTyConNames wired_in_tycons) `unionBags`
-
- -- Wired in Ids
- listToBag (map getName wired_in_ids) `unionBags`
-
- -- PrimOps
- listToBag (map (getName.primOpName) allThePrimOps) `unionBags`
-
- -- Other names with magic keys
- listToBag knownKeyNames
-\end{code}
-
-
-\begin{code}
-getTyConNames :: TyCon -> Bag Name
-getTyConNames tycon
- = getName tycon `consBag` listToBag (map getName (tyConDataCons tycon))
- -- Synonyms return empty list of constructors
+wiredInThings :: [TyThing]
+wiredInThings
+ = concat
+ [ -- Wired in TyCons and their implicit Ids
+ tycon_things
+ , concatMap implicitTyThings tycon_things
+
+ -- Wired in Ids
+ , map AnId wiredInIds
+
+ -- PrimOps
+ , map (AnId . mkPrimOpId) allThePrimOps
+ ]
+ where
+ tycon_things = map ATyCon ([funTyCon] ++ primTyCons ++ wiredInTyCons)
\end{code}
-
We let a lot of "non-standard" values be visible, so that we can make
sense of them in interface pragmas. It's cool, though they all have
"non-standard" names, so they won't get past the parser in user code.
%************************************************************************
%* *
-\subsection{Wired in TyCons}
+ PrimOpIds
%* *
%************************************************************************
-
\begin{code}
-wired_in_tycons = [mkFunTyCon] ++
- prim_tycons ++
- tuple_tycons ++
- data_tycons
-
-prim_tycons
- = [ addrPrimTyCon
- , arrayPrimTyCon
- , byteArrayPrimTyCon
- , charPrimTyCon
- , doublePrimTyCon
- , floatPrimTyCon
- , intPrimTyCon
- , foreignObjPrimTyCon
- , mutableArrayPrimTyCon
- , mutableByteArrayPrimTyCon
- , synchVarPrimTyCon
- , realWorldTyCon
- , stablePtrPrimTyCon
- , statePrimTyCon
- , wordPrimTyCon
- ]
-
-tuple_tycons = unitTyCon : [tupleTyCon i | i <- [2..37] ]
-
-
-data_tycons
- = [ listTyCon
- , addrTyCon
- , boolTyCon
- , charTyCon
- , doubleTyCon
- , floatTyCon
- , foreignObjTyCon
- , intTyCon
- , integerTyCon
- , liftTyCon
- , primIoTyCon
- , return2GMPsTyCon
- , returnIntAndGMPTyCon
- , stTyCon
- , stablePtrTyCon
- , stateAndAddrPrimTyCon
- , stateAndArrayPrimTyCon
- , stateAndByteArrayPrimTyCon
- , stateAndCharPrimTyCon
- , stateAndDoublePrimTyCon
- , stateAndFloatPrimTyCon
- , stateAndForeignObjPrimTyCon
- , stateAndIntPrimTyCon
- , stateAndMutableArrayPrimTyCon
- , stateAndMutableByteArrayPrimTyCon
- , stateAndPtrPrimTyCon
- , stateAndStablePtrPrimTyCon
- , stateAndSynchVarPrimTyCon
- , stateAndWordPrimTyCon
- , stateTyCon
- , voidTyCon
- , wordTyCon
- ]
+primOpIds :: Array Int Id -- Indexed by PrimOp tag
+primOpIds = array (1,maxPrimOpTag) [ (primOpTag op, mkPrimOpId op)
+ | op <- allThePrimOps]
-min_nonprim_tycon_list -- used w/ HideMostBuiltinNames
- = [ boolTyCon
- , charTyCon
- , intTyCon
- , floatTyCon
- , doubleTyCon
- , integerTyCon
- , liftTyCon
- , return2GMPsTyCon -- ADR asked for these last two (WDP 94/11)
- , returnIntAndGMPTyCon
- ]
+primOpId :: PrimOp -> Id
+primOpId op = primOpIds ! primOpTag op
\end{code}
+
%************************************************************************
%* *
-\subsection{Wired in Ids}
+\subsection{Export lists for pseudo-modules (GHC.Prim)}
%* *
%************************************************************************
-The WiredIn Ids ...
-ToDo: Some of these should be moved to id_keys_infos!
+GHC.Prim "exports" all the primops and primitive types, some
+wired-in Ids.
\begin{code}
-wired_in_ids
- = [ aBSENT_ERROR_ID
- , augmentId
- , buildId
- , eRROR_ID
- , foldlId
- , foldrId
- , iRREFUT_PAT_ERROR_ID
- , integerMinusOneId
- , integerPlusOneId
- , integerPlusTwoId
- , integerZeroId
- , nON_EXHAUSTIVE_GUARDS_ERROR_ID
- , nO_DEFAULT_METHOD_ERROR_ID
- , nO_EXPLICIT_METHOD_ERROR_ID
- , pAR_ERROR_ID
- , pAT_ERROR_ID
- , packStringForCId
- , rEC_CON_ERROR_ID
- , rEC_UPD_ERROR_ID
- , realWorldPrimId
- , runSTId
- , tRACE_ID
- , unpackCString2Id
- , unpackCStringAppendId
- , unpackCStringFoldrId
- , unpackCStringId
- , voidId
-
--- , copyableId
--- , forkId
--- , noFollowId
--- , parAtAbsId
--- , parAtForNowId
--- , parAtId
--- , parAtRelId
--- , parGlobalId
--- , parId
--- , parLocalId
--- , seqId
- ]
+ghcPrimExports :: [RdrAvailInfo]
+ghcPrimExports
+ = map (Avail . nameOccName . idName) ghcPrimIds ++
+ map (Avail . primOpOcc) allThePrimOps ++
+ [ AvailTC occ [occ] |
+ n <- funTyCon : primTyCons, let occ = nameOccName (tyConName n)
+ ]
\end{code}
%* *
%************************************************************************
-Ids, Synonyms, Classes and ClassOps with builtin keys.
-
-\begin{code}
-mkKnownKeyGlobal :: (RdrName, Unique) -> Name
-mkKnownKeyGlobal (Qual mod occ, uniq) = mkGlobalName uniq mod occ VanillaDefn Implicit
-
-main_NAME = mkKnownKeyGlobal (main_RDR, mainKey)
-mainPrimIO_NAME = mkKnownKeyGlobal (mainPrimIO_RDR, mainPrimIoKey)
-ioTyCon_NAME = mkKnownKeyGlobal (ioTyCon_RDR, iOTyConKey)
-primIoTyCon_NAME = getName primIoTyCon
-
-knownKeyNames :: [Name]
-knownKeyNames
- = [main_NAME, mainPrimIO_NAME, ioTyCon_NAME]
- ++
- map mkKnownKeyGlobal
- [
- -- Type constructors (synonyms especially)
- (orderingTyCon_RDR, orderingTyConKey)
- , (rationalTyCon_RDR, rationalTyConKey)
- , (ratioTyCon_RDR, ratioTyConKey)
-
- -- Classes. *Must* include:
- -- classes that are grabbed by key (e.g., eqClassKey)
- -- classes in "Class.standardClassKeys" (quite a few)
- , (eqClass_RDR, eqClassKey) -- mentioned, derivable
- , (ordClass_RDR, ordClassKey) -- derivable
- , (evalClass_RDR, evalClassKey) -- mentioned
- , (boundedClass_RDR, boundedClassKey) -- derivable
- , (numClass_RDR, numClassKey) -- mentioned, numeric
- , (enumClass_RDR, enumClassKey) -- derivable
- , (monadClass_RDR, monadClassKey)
- , (monadZeroClass_RDR, monadZeroClassKey)
- , (monadPlusClass_RDR, monadPlusClassKey)
- , (functorClass_RDR, functorClassKey)
- , (showClass_RDR, showClassKey) -- derivable
- , (realClass_RDR, realClassKey) -- numeric
- , (integralClass_RDR, integralClassKey) -- numeric
- , (fractionalClass_RDR, fractionalClassKey) -- numeric
- , (floatingClass_RDR, floatingClassKey) -- numeric
- , (realFracClass_RDR, realFracClassKey) -- numeric
- , (realFloatClass_RDR, realFloatClassKey) -- numeric
- , (readClass_RDR, readClassKey) -- derivable
- , (ixClass_RDR, ixClassKey) -- derivable (but it isn't Prelude.Ix; hmmm)
- , (ccallableClass_RDR, cCallableClassKey) -- mentioned, ccallish
- , (creturnableClass_RDR, cReturnableClassKey) -- mentioned, ccallish
-
- -- ClassOps
- , (fromInt_RDR, fromIntClassOpKey)
- , (fromInteger_RDR, fromIntegerClassOpKey)
- , (enumFrom_RDR, enumFromClassOpKey)
- , (enumFromThen_RDR, enumFromThenClassOpKey)
- , (enumFromTo_RDR, enumFromToClassOpKey)
- , (enumFromThenTo_RDR, enumFromThenToClassOpKey)
- , (fromEnum_RDR, fromEnumClassOpKey)
- , (eq_RDR, eqClassOpKey)
- , (thenM_RDR, thenMClassOpKey)
- , (zeroM_RDR, zeroClassOpKey)
- , (fromRational_RDR, fromRationalClassOpKey)
- ]
-\end{code}
-
ToDo: make it do the ``like'' part properly (as in 0.26 and before).
\begin{code}
-maybeCharLikeTyCon tc = if (uniqueOf tc == charDataConKey) then Just charDataCon else Nothing
-maybeIntLikeTyCon tc = if (uniqueOf tc == intDataConKey) then Just intDataCon else Nothing
+maybeCharLikeCon, maybeIntLikeCon :: DataCon -> Bool
+maybeCharLikeCon con = con `hasKey` charDataConKey
+maybeIntLikeCon con = con `hasKey` intDataConKey
\end{code}
-%************************************************************************
-%* *
-\subsection{Commonly-used RdrNames}
-%* *
-%************************************************************************
-
-These RdrNames are not really "built in", but some parts of the compiler
-(notably the deriving mechanism) need to mention their names, and it's convenient
-to write them all down in one place.
-
-\begin{code}
-prelude_primop op = qual (modAndOcc (primOpName op))
-
-intTyCon_RDR = qual (modAndOcc intTyCon)
-ioTyCon_RDR = tcQual (iO_BASE, SLIT("IO"))
-orderingTyCon_RDR = tcQual (pREL_BASE, SLIT("Ordering"))
-rationalTyCon_RDR = tcQual (pREL_NUM, SLIT("Rational"))
-ratioTyCon_RDR = tcQual (pREL_NUM, SLIT("Ratio"))
-
-eqClass_RDR = tcQual (pREL_BASE, SLIT("Eq"))
-ordClass_RDR = tcQual (pREL_BASE, SLIT("Ord"))
-evalClass_RDR = tcQual (pREL_BASE, SLIT("Eval"))
-boundedClass_RDR = tcQual (pREL_BASE, SLIT("Bounded"))
-numClass_RDR = tcQual (pREL_BASE, SLIT("Num"))
-enumClass_RDR = tcQual (pREL_BASE, SLIT("Enum"))
-monadClass_RDR = tcQual (pREL_BASE, SLIT("Monad"))
-monadZeroClass_RDR = tcQual (pREL_BASE, SLIT("MonadZero"))
-monadPlusClass_RDR = tcQual (pREL_BASE, SLIT("MonadPlus"))
-functorClass_RDR = tcQual (pREL_BASE, SLIT("Functor"))
-showClass_RDR = tcQual (pREL_BASE, SLIT("Show"))
-realClass_RDR = tcQual (pREL_NUM, SLIT("Real"))
-integralClass_RDR = tcQual (pREL_NUM, SLIT("Integral"))
-fractionalClass_RDR = tcQual (pREL_NUM, SLIT("Fractional"))
-floatingClass_RDR = tcQual (pREL_NUM, SLIT("Floating"))
-realFracClass_RDR = tcQual (pREL_NUM, SLIT("RealFrac"))
-realFloatClass_RDR = tcQual (pREL_NUM, SLIT("RealFloat"))
-readClass_RDR = tcQual (pREL_READ, SLIT("Read"))
-ixClass_RDR = tcQual (iX, SLIT("Ix"))
-ccallableClass_RDR = tcQual (fOREIGN, SLIT("CCallable"))
-creturnableClass_RDR = tcQual (fOREIGN, SLIT("CReturnable"))
-
-fromInt_RDR = varQual (pREL_BASE, SLIT("fromInt"))
-fromInteger_RDR = varQual (pREL_BASE, SLIT("fromInteger"))
-fromEnum_RDR = varQual (pREL_BASE, SLIT("fromEnum"))
-enumFrom_RDR = varQual (pREL_BASE, SLIT("enumFrom"))
-enumFromTo_RDR = varQual (pREL_BASE, SLIT("enumFromTo"))
-enumFromThen_RDR = varQual (pREL_BASE, SLIT("enumFromThen"))
-enumFromThenTo_RDR = varQual (pREL_BASE, SLIT("enumFromThenTo"))
-
-thenM_RDR = varQual (pREL_BASE, SLIT(">>="))
-zeroM_RDR = varQual (pREL_BASE, SLIT("zero"))
-fromRational_RDR = varQual (pREL_NUM, SLIT("fromRational"))
-
-negate_RDR = varQual (pREL_BASE, SLIT("negate"))
-eq_RDR = varQual (pREL_BASE, SLIT("=="))
-ne_RDR = varQual (pREL_BASE, SLIT("/="))
-le_RDR = varQual (pREL_BASE, SLIT("<="))
-lt_RDR = varQual (pREL_BASE, SLIT("<"))
-ge_RDR = varQual (pREL_BASE, SLIT(">="))
-gt_RDR = varQual (pREL_BASE, SLIT(">"))
-ltTag_RDR = varQual (pREL_BASE, SLIT("LT"))
-eqTag_RDR = varQual (pREL_BASE, SLIT("EQ"))
-gtTag_RDR = varQual (pREL_BASE, SLIT("GT"))
-max_RDR = varQual (pREL_BASE, SLIT("max"))
-min_RDR = varQual (pREL_BASE, SLIT("min"))
-compare_RDR = varQual (pREL_BASE, SLIT("compare"))
-minBound_RDR = varQual (pREL_BASE, SLIT("minBound"))
-maxBound_RDR = varQual (pREL_BASE, SLIT("maxBound"))
-false_RDR = varQual (pREL_BASE, SLIT("False"))
-true_RDR = varQual (pREL_BASE, SLIT("True"))
-and_RDR = varQual (pREL_BASE, SLIT("&&"))
-not_RDR = varQual (pREL_BASE, SLIT("not"))
-compose_RDR = varQual (pREL_BASE, SLIT("."))
-append_RDR = varQual (pREL_BASE, SLIT("++"))
-map_RDR = varQual (pREL_BASE, SLIT("map"))
-
-showList___RDR = varQual (pREL_BASE, SLIT("showList__"))
-showsPrec_RDR = varQual (pREL_BASE, SLIT("showsPrec"))
-showList_RDR = varQual (pREL_BASE, SLIT("showList"))
-showSpace_RDR = varQual (pREL_BASE, SLIT("showSpace"))
-showString_RDR = varQual (pREL_BASE, SLIT("showString"))
-showParen_RDR = varQual (pREL_BASE, SLIT("showParen"))
-
-range_RDR = varQual (iX, SLIT("range"))
-index_RDR = varQual (iX, SLIT("index"))
-inRange_RDR = varQual (iX, SLIT("inRange"))
-
-readsPrec_RDR = varQual (pREL_READ, SLIT("readsPrec"))
-readList_RDR = varQual (pREL_READ, SLIT("readList"))
-readParen_RDR = varQual (pREL_READ, SLIT("readParen"))
-lex_RDR = varQual (pREL_READ, SLIT("lex"))
-readList___RDR = varQual (pREL_READ, SLIT("readList__"))
-
-plus_RDR = varQual (pREL_BASE, SLIT("+"))
-times_RDR = varQual (pREL_BASE, SLIT("*"))
-mkInt_RDR = varQual (pREL_BASE, SLIT("I#"))
-
-error_RDR = varQual (iO_BASE, SLIT("error"))
-
-eqH_Char_RDR = prelude_primop CharEqOp
-ltH_Char_RDR = prelude_primop CharLtOp
-eqH_Word_RDR = prelude_primop WordEqOp
-ltH_Word_RDR = prelude_primop WordLtOp
-eqH_Addr_RDR = prelude_primop AddrEqOp
-ltH_Addr_RDR = prelude_primop AddrLtOp
-eqH_Float_RDR = prelude_primop FloatEqOp
-ltH_Float_RDR = prelude_primop FloatLtOp
-eqH_Double_RDR = prelude_primop DoubleEqOp
-ltH_Double_RDR = prelude_primop DoubleLtOp
-eqH_Int_RDR = prelude_primop IntEqOp
-ltH_Int_RDR = prelude_primop IntLtOp
-geH_RDR = prelude_primop IntGeOp
-leH_RDR = prelude_primop IntLeOp
-minusH_RDR = prelude_primop IntSubOp
-
-main_RDR = varQual (mAIN, SLIT("main"))
-mainPrimIO_RDR = varQual (gHC_MAIN, SLIT("mainPrimIO"))
-\end{code}
%************************************************************************
%* *
-\subsection[Class-std-groups]{Standard groups of Prelude classes}
+\subsection{Class predicates}
%* *
%************************************************************************
-@derivableClassKeys@ is also used in checking \tr{deriving} constructs
-(@TcDeriv@).
-
-@derivingOccurrences@ maps a class name to a list of the (qualified) occurrences
-that will be mentioned by the derived code for the class when it is later generated.
-We don't need to put in things that are WiredIn (because they are already mapped to their
-correct name by the @NameSupply@. The class itself, and all its class ops, is
-already flagged as an occurrence so we don't need to mention that either.
-
-@derivingOccurrences@ has an item for every derivable class, even if that item is empty,
-because we treat lookup failure as indicating that the class is illegal in a deriving clause.
-
-\begin{code}
-derivingOccurrences :: UniqFM [RdrName]
-derivingOccurrences = listToUFM deriving_occ_info
-
-derivableClassKeys = map fst deriving_occ_info
-
-deriving_occ_info
- = [ (eqClassKey, [intTyCon_RDR, and_RDR, not_RDR])
- , (ordClassKey, [intTyCon_RDR, compose_RDR])
- , (enumClassKey, [intTyCon_RDR, map_RDR])
- , (evalClassKey, [intTyCon_RDR])
- , (boundedClassKey, [intTyCon_RDR])
- , (showClassKey, [intTyCon_RDR, numClass_RDR, ordClass_RDR, compose_RDR, showString_RDR,
- showParen_RDR, showSpace_RDR, showList___RDR])
- , (readClassKey, [intTyCon_RDR, numClass_RDR, ordClass_RDR, append_RDR,
- lex_RDR, readParen_RDR, readList___RDR])
- , (ixClassKey, [intTyCon_RDR, numClass_RDR, and_RDR, map_RDR])
- ]
- -- intTyCon: Practically any deriving needs Int, either for index calculations,
- -- or for taggery.
- -- ordClass: really it's the methods that are actually used.
- -- numClass: for Int literals
-\end{code}
-
-
-NOTE: @Eq@ and @Text@ do need to appear in @standardClasses@
-even though every numeric class has these two as a superclass,
-because the list of ambiguous dictionaries hasn't been simplified.
-
\begin{code}
-isCcallishClass, isNoDictClass, isNumericClass, isStandardClass :: Class -> Bool
+isNumericClass, isStandardClass :: Class -> Bool
-isNumericClass clas = classKey clas `is_elem` numericClassKeys
-isStandardClass clas = classKey clas `is_elem` standardClassKeys
-isCcallishClass clas = classKey clas `is_elem` cCallishClassKeys
-isNoDictClass clas = classKey clas `is_elem` noDictClassKeys
+isNumericClass clas = classKey clas `is_elem` numericClassKeys
+isStandardClass clas = classKey clas `is_elem` standardClassKeys
is_elem = isIn "is_X_Class"
-
-numericClassKeys
- = [ numClassKey
- , realClassKey
- , integralClassKey
- , fractionalClassKey
- , floatingClassKey
- , realFracClassKey
- , realFloatClassKey
- ]
-
-needsDataDeclCtxtClassKeys -- see comments in TcDeriv
- = [ readClassKey
- ]
-
-cCallishClassKeys = [ cCallableClassKey, cReturnableClassKey ]
-
-standardClassKeys
- = derivableClassKeys ++ numericClassKeys ++ cCallishClassKeys
- --
- -- We have to have "CCallable" and "CReturnable" in the standard
- -- classes, so that if you go...
- --
- -- _ccall_ foo ... 93{-numeric literal-} ...
- --
- -- ... it can do The Right Thing on the 93.
-
-noDictClassKeys -- These classes are used only for type annotations;
- -- they are not implemented by dictionaries, ever.
- = cCallishClassKeys
- -- I used to think that class Eval belonged in here, but
- -- we really want functions with type (Eval a => ...) and that
- -- means that we really want to pass a placeholder for an Eval
- -- dictionary. The unit tuple is what we'll get if we leave things
- -- alone, and that'll do for now. Could arrange to drop that parameter
- -- in the end.
\end{code}
projects / ghc-hetmet.git / blobdiff