X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fprelude%2FTysWiredIn.lhs;h=ca4f9509a92652f1340a0f6415e85ff74cd9f371;hb=ea138284b7343bb1810cfbd0284a608dc57f7d46;hp=f4542a6ec6fb71ebfa7991e8cb2f13a8799cb020;hpb=266fadd93461d4317967df08cd641e965cd8769a;p=ghc-hetmet.git diff --git a/ghc/compiler/prelude/TysWiredIn.lhs b/ghc/compiler/prelude/TysWiredIn.lhs index f4542a6..ca4f950 100644 --- a/ghc/compiler/prelude/TysWiredIn.lhs +++ b/ghc/compiler/prelude/TysWiredIn.lhs @@ -11,9 +11,17 @@ types and operations.'' \begin{code} module TysWiredIn ( + wiredInTyCons, genericTyCons, + addrDataCon, addrTy, addrTyCon, + ptrDataCon, + ptrTy, + ptrTyCon, + funPtrDataCon, + funPtrTy, + funPtrTyCon, boolTy, boolTyCon, charDataCon, @@ -22,25 +30,20 @@ module TysWiredIn ( consDataCon, doubleDataCon, doubleTy, - isDoubleTy, doubleTyCon, - falseDataCon, + falseDataCon, falseDataConId, floatDataCon, floatTy, - isFloatTy, floatTyCon, intDataCon, intTy, intTyCon, - isIntTy, - inIntRange, integerTy, integerTyCon, smallIntegerDataCon, largeIntegerDataCon, - isIntegerTy, listTyCon, @@ -49,195 +52,227 @@ module TysWiredIn ( -- tuples mkTupleTy, - tupleTyCon, tupleCon, unitTyCon, unitDataCon, pairTyCon, pairDataCon, - - -- unboxed tuples - mkUnboxedTupleTy, - unboxedTupleTyCon, unboxedTupleCon, + tupleTyCon, tupleCon, + unitTyCon, unitDataConId, pairTyCon, + unboxedSingletonTyCon, unboxedSingletonDataCon, unboxedPairTyCon, unboxedPairDataCon, + -- Generics + genUnitTyCon, genUnitDataCon, + plusTyCon, inrDataCon, inlDataCon, + crossTyCon, crossDataCon, + stablePtrTyCon, stringTy, - trueDataCon, + trueDataCon, trueDataConId, unitTy, voidTy, wordDataCon, wordTy, wordTyCon, - isFFIArgumentTy, -- :: Bool -> Type -> Bool - isFFIResultTy, -- :: Type -> Bool - isFFIExternalTy, -- :: Type -> Bool - isAddrTy, -- :: Type -> Bool - isForeignObjTy -- :: Type -> Bool - + isFFIArgumentTy, -- :: DynFlags -> Safety -> Type -> Bool + isFFIImportResultTy, -- :: DynFlags -> Type -> Bool + isFFIExportResultTy, -- :: Type -> Bool + isFFIExternalTy, -- :: Type -> Bool + isFFIDynArgumentTy, -- :: Type -> Bool + isFFIDynResultTy, -- :: Type -> Bool + isFFILabelTy, -- :: Type -> Bool ) where #include "HsVersions.h" -import {-# SOURCE #-} MkId( mkDataConId ) +import {-# SOURCE #-} MkId( mkDataConId, mkDataConWrapId ) +import {-# SOURCE #-} Generics( mkTyConGenInfo ) -- friends: -import PrelMods +import PrelNames import TysPrim -- others: +import ForeignCall ( Safety, playSafe ) import Constants ( mAX_TUPLE_SIZE ) -import Module ( Module, mkPrelModule ) -import Name ( mkWiredInTyConName, mkWiredInIdName, mkSrcOccFS, dataName ) -import DataCon ( DataCon, StrictnessMark(..), mkDataCon ) +import Module ( mkPrelModule ) +import Name ( Name, nameRdrName, nameUnique, nameOccName, + nameModule, mkWiredInName ) +import OccName ( mkOccFS, tcName, dataName, mkWorkerOcc, mkGenOcc1, mkGenOcc2 ) +import RdrName ( rdrNameOcc ) +import DataCon ( DataCon, mkDataCon, dataConId ) import Var ( TyVar, tyVarKind ) -import TyCon ( TyCon, ArgVrcs, mkAlgTyCon, mkSynTyCon, mkTupleTyCon ) -import BasicTypes ( Arity, NewOrData(..), RecFlag(..) ) -import Type ( Type, mkTyConTy, mkTyConApp, mkSigmaTy, mkTyVarTys, - mkArrowKinds, boxedTypeKind, unboxedTypeKind, - mkFunTy, mkFunTys, isUnLiftedType, - splitTyConApp_maybe, splitAlgTyConApp_maybe, - TauType, ClassContext ) -import PrimRep ( PrimRep(..) ) -import Unique -import CmdLineOpts ( opt_GlasgowExts ) -import Util ( assoc ) -import Panic ( panic ) +import TyCon ( TyCon, AlgTyConFlavour(..), tyConDataCons, + mkTupleTyCon, isUnLiftedTyCon, mkAlgTyCon + ) + +import BasicTypes ( Arity, RecFlag(..), Boxity(..), isBoxed, StrictnessMark(..) ) + +import Type ( Type, mkTyConTy, mkTyConApp, mkTyVarTys, + mkArrowKinds, liftedTypeKind, unliftedTypeKind, + splitTyConApp_maybe, + TauType, ThetaType ) +import Unique ( incrUnique, mkTupleTyConUnique, mkTupleDataConUnique ) +import PrelNames +import CmdLineOpts import Array alpha_tyvar = [alphaTyVar] alpha_ty = [alphaTy] alpha_beta_tyvars = [alphaTyVar, betaTyVar] - -pcRecDataTyCon, pcNonRecDataTyCon, pcNonRecNewTyCon - :: Unique{-TyConKey-} -> Module -> FAST_STRING - -> [TyVar] -> ArgVrcs -> [DataCon] -> TyCon - -pcRecDataTyCon = pcTyCon DataType Recursive -pcNonRecDataTyCon = pcTyCon DataType NonRecursive -pcNonRecNewTyCon = pcTyCon NewType NonRecursive - -pcTyCon new_or_data is_rec key mod str tyvars argvrcs cons - = tycon - where - tycon = mkAlgTyCon name kind - tyvars - [] -- No context - argvrcs - cons - [] -- No derivings - Nothing -- Not a dictionary - new_or_data - is_rec - - name = mkWiredInTyConName key mod str tycon - kind = mkArrowKinds (map tyVarKind tyvars) boxedTypeKind - -pcSynTyCon key mod str kind arity tyvars expansion argvrcs -- this fun never used! - = tycon - where - tycon = mkSynTyCon name kind arity tyvars expansion argvrcs - name = mkWiredInTyConName key mod str tycon - -pcDataCon :: Unique{-DataConKey-} -> Module -> FAST_STRING - -> [TyVar] -> ClassContext -> [TauType] -> TyCon -> DataCon -pcDataCon key mod str tyvars context arg_tys tycon - = data_con - where - data_con = mkDataCon name - [ NotMarkedStrict | a <- arg_tys ] - [ {- no labelled fields -} ] - tyvars context [] [] arg_tys tycon id - name = mkWiredInIdName key mod (mkSrcOccFS dataName str) id - id = mkDataConId data_con \end{code} + %************************************************************************ %* * -\subsection[TysWiredIn-tuples]{The tuple types} +\subsection{Wired in type constructors} %* * %************************************************************************ \begin{code} -tupleTyCon :: Arity -> TyCon -tupleTyCon i | i > mAX_TUPLE_SIZE = fst (mk_tuple i) -- Build one specially - | otherwise = tupleTyConArr!i - -tupleCon :: Arity -> DataCon -tupleCon i | i > mAX_TUPLE_SIZE = snd (mk_tuple i) -- Build one specially - | otherwise = tupleConArr!i - -tupleTyCons :: [TyCon] -tupleTyCons = elems tupleTyConArr +wiredInTyCons :: [TyCon] +wiredInTyCons = data_tycons ++ tuple_tycons ++ unboxed_tuple_tycons + +data_tycons = genericTyCons ++ + [ addrTyCon + , ptrTyCon + , funPtrTyCon + , boolTyCon + , charTyCon + , doubleTyCon + , floatTyCon + , intTyCon + , integerTyCon + , listTyCon + , wordTyCon + ] + +genericTyCons :: [TyCon] +genericTyCons = [ plusTyCon, crossTyCon, genUnitTyCon ] + + +tuple_tycons = unitTyCon : [tupleTyCon Boxed i | i <- [2..mAX_TUPLE_SIZE] ] +unboxed_tuple_tycons = [tupleTyCon Unboxed i | i <- [1..mAX_TUPLE_SIZE] ] +\end{code} -tupleTyConArr :: Array Int TyCon -tupleTyConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map fst tuples) -tupleConArr :: Array Int DataCon -tupleConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map snd tuples) +%************************************************************************ +%* * +\subsection{mkWiredInTyCon} +%* * +%************************************************************************ -tuples :: [(TyCon,DataCon)] -tuples = [mk_tuple i | i <- [0..mAX_TUPLE_SIZE]] +\begin{code} +pcNonRecDataTyCon = pcTyCon DataTyCon NonRecursive +pcRecDataTyCon = pcTyCon DataTyCon Recursive -mk_tuple :: Int -> (TyCon,DataCon) -mk_tuple arity = (tycon, tuple_con) +pcTyCon new_or_data is_rec name tyvars argvrcs cons + = tycon where - tycon = mkTupleTyCon tc_name tc_kind arity tyvars tuple_con True - tc_name = mkWiredInTyConName tc_uniq mod name_str tycon - tc_kind = mkArrowKinds (map tyVarKind tyvars) boxedTypeKind + tycon = mkAlgTyCon name kind + tyvars + [] -- No context + argvrcs + cons + (length cons) + [] -- No record selectors + new_or_data + is_rec + gen_info + + mod = nameModule name + kind = mkArrowKinds (map tyVarKind tyvars) liftedTypeKind + gen_info = mk_tc_gen_info mod (nameUnique name) name tycon + +-- We generate names for the generic to/from Ids by incrementing +-- the TyCon unique. So each Prelude tycon needs 3 slots, one +-- for itself and two more for the generic Ids. +mk_tc_gen_info mod tc_uniq tc_name tycon + = mkTyConGenInfo tycon [name1, name2] + where + tc_occ_name = nameOccName tc_name + occ_name1 = mkGenOcc1 tc_occ_name + occ_name2 = mkGenOcc2 tc_occ_name + fn1_key = incrUnique tc_uniq + fn2_key = incrUnique fn1_key + name1 = mkWiredInName mod occ_name1 fn1_key + name2 = mkWiredInName mod occ_name2 fn2_key + +pcDataCon :: Name -> [TyVar] -> ThetaType -> [TauType] -> TyCon -> DataCon +-- The unique is the first of two free uniques; +-- the first is used for the datacon itself and the worker; +-- the second is used for the wrapper. + +pcDataCon name tyvars context arg_tys tycon + = data_con + where + data_con = mkDataCon name + [ NotMarkedStrict | a <- arg_tys ] + [ {- no labelled fields -} ] + tyvars context [] [] arg_tys tycon work_id wrap_id - tuple_con = pcDataCon dc_uniq mod name_str tyvars [] tyvar_tys tycon - tyvars = take arity alphaTyVars - tyvar_tys = mkTyVarTys tyvars - (mod_name, name_str) = mkTupNameStr arity - tc_uniq = mkTupleTyConUnique arity - dc_uniq = mkTupleDataConUnique arity - mod = mkPrelModule mod_name + wrap_rdr = nameRdrName name + wrap_occ = rdrNameOcc wrap_rdr -unitTyCon = tupleTyCon 0 -pairTyCon = tupleTyCon 2 + mod = nameModule name + wrap_id = mkDataConWrapId data_con -unitDataCon = tupleCon 0 -pairDataCon = tupleCon 2 + work_occ = mkWorkerOcc wrap_occ + work_key = incrUnique (nameUnique name) + work_name = mkWiredInName mod work_occ work_key + work_id = mkDataConId work_name data_con \end{code} + %************************************************************************ %* * -\subsection[TysWiredIn-ubx-tuples]{Unboxed Tuple Types} +\subsection[TysWiredIn-tuples]{The tuple types} %* * %************************************************************************ \begin{code} -unboxedTupleTyCon :: Arity -> TyCon -unboxedTupleTyCon i | i > mAX_TUPLE_SIZE = fst (mk_unboxed_tuple i) - | otherwise = unboxedTupleTyConArr!i - -unboxedTupleCon :: Arity -> DataCon -unboxedTupleCon i | i > mAX_TUPLE_SIZE = snd (mk_unboxed_tuple i) - | otherwise = unboxedTupleConArr!i +tupleTyCon :: Boxity -> Arity -> TyCon +tupleTyCon boxity i | i > mAX_TUPLE_SIZE = fst (mk_tuple boxity i) -- Build one specially +tupleTyCon Boxed i = fst (boxedTupleArr ! i) +tupleTyCon Unboxed i = fst (unboxedTupleArr ! i) + +tupleCon :: Boxity -> Arity -> DataCon +tupleCon boxity i | i > mAX_TUPLE_SIZE = snd (mk_tuple boxity i) -- Build one specially +tupleCon Boxed i = snd (boxedTupleArr ! i) +tupleCon Unboxed i = snd (unboxedTupleArr ! i) + +boxedTupleArr, unboxedTupleArr :: Array Int (TyCon,DataCon) +boxedTupleArr = array (0,mAX_TUPLE_SIZE) [(i,mk_tuple Boxed i) | i <- [0..mAX_TUPLE_SIZE]] +unboxedTupleArr = array (0,mAX_TUPLE_SIZE) [(i,mk_tuple Unboxed i) | i <- [0..mAX_TUPLE_SIZE]] + +mk_tuple :: Boxity -> Int -> (TyCon,DataCon) +mk_tuple boxity arity = (tycon, tuple_con) + where + tycon = mkTupleTyCon tc_name tc_kind arity tyvars tuple_con boxity gen_info + tc_name = mkWiredInName mod (mkOccFS tcName name_str) tc_uniq + tc_kind = mkArrowKinds (map tyVarKind tyvars) res_kind + res_kind | isBoxed boxity = liftedTypeKind + | otherwise = unliftedTypeKind -unboxedTupleTyConArr :: Array Int TyCon -unboxedTupleTyConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map fst ubx_tuples) + tyvars | isBoxed boxity = take arity alphaTyVars + | otherwise = take arity openAlphaTyVars -unboxedTupleConArr :: Array Int DataCon -unboxedTupleConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map snd ubx_tuples) + tuple_con = pcDataCon name tyvars [] tyvar_tys tycon + tyvar_tys = mkTyVarTys tyvars + (mod_name, name_str) = mkTupNameStr boxity arity + name = mkWiredInName mod (mkOccFS dataName name_str) dc_uniq + tc_uniq = mkTupleTyConUnique boxity arity + dc_uniq = mkTupleDataConUnique boxity arity + mod = mkPrelModule mod_name + gen_info = mk_tc_gen_info mod tc_uniq tc_name tycon -ubx_tuples :: [(TyCon,DataCon)] -ubx_tuples = [mk_unboxed_tuple i | i <- [0..mAX_TUPLE_SIZE]] +unitTyCon = tupleTyCon Boxed 0 +unitDataConId = dataConId (head (tyConDataCons unitTyCon)) -mk_unboxed_tuple :: Int -> (TyCon,DataCon) -mk_unboxed_tuple arity = (tycon, tuple_con) - where - tycon = mkTupleTyCon tc_name tc_kind arity tyvars tuple_con False - tc_name = mkWiredInTyConName tc_uniq mod name_str tycon - tc_kind = mkArrowKinds (map tyVarKind tyvars) unboxedTypeKind +pairTyCon = tupleTyCon Boxed 2 - tuple_con = pcDataCon dc_uniq mod name_str tyvars [] tyvar_tys tycon - tyvars = take arity openAlphaTyVars - tyvar_tys = mkTyVarTys tyvars - (mod_name, name_str) = mkUbxTupNameStr arity - tc_uniq = mkUbxTupleTyConUnique arity - dc_uniq = mkUbxTupleDataConUnique arity - mod = mkPrelModule mod_name +unboxedSingletonTyCon = tupleTyCon Unboxed 1 +unboxedSingletonDataCon = tupleCon Unboxed 1 -unboxedPairTyCon = unboxedTupleTyCon 2 -unboxedPairDataCon = unboxedTupleCon 2 +unboxedPairTyCon = tupleTyCon Unboxed 2 +unboxedPairDataCon = tupleCon Unboxed 2 \end{code} %************************************************************************ @@ -253,7 +288,7 @@ unboxedPairDataCon = unboxedTupleCon 2 -- -- data Void = -- No constructors! -- --- ) It's boxed; there is only one value of this +-- ) It's lifted; there is only one value of this -- type, namely "void", whose semantics is just bottom. -- -- Haskell 98 drops the definition of a Void type, so we just 'simulate' @@ -265,8 +300,8 @@ voidTy = unitTy \begin{code} charTy = mkTyConTy charTyCon -charTyCon = pcNonRecDataTyCon charTyConKey pREL_BASE SLIT("Char") [] [] [charDataCon] -charDataCon = pcDataCon charDataConKey pREL_BASE SLIT("C#") [] [] [charPrimTy] charTyCon +charTyCon = pcNonRecDataTyCon charTyConName [] [] [charDataCon] +charDataCon = pcDataCon charDataConName [] [] [charPrimTy] charTyCon stringTy = mkListTy charTy -- convenience only \end{code} @@ -274,93 +309,82 @@ stringTy = mkListTy charTy -- convenience only \begin{code} intTy = mkTyConTy intTyCon -intTyCon = pcNonRecDataTyCon intTyConKey pREL_BASE SLIT("Int") [] [] [intDataCon] -intDataCon = pcDataCon intDataConKey pREL_BASE SLIT("I#") [] [] [intPrimTy] intTyCon - -isIntTy :: Type -> Bool -isIntTy ty - = case (splitAlgTyConApp_maybe ty) of - Just (tycon, [], _) -> getUnique tycon == intTyConKey - _ -> False - -inIntRange :: Integer -> Bool -- Tells if an integer lies in the legal range of Ints -inIntRange i = (min_int <= i) && (i <= max_int) - -max_int, min_int :: Integer -max_int = toInteger maxInt -min_int = toInteger minInt - +intTyCon = pcNonRecDataTyCon intTyConName [] [] [intDataCon] +intDataCon = pcDataCon intDataConName [] [] [intPrimTy] intTyCon \end{code} \begin{code} - wordTy = mkTyConTy wordTyCon -wordTyCon = pcNonRecDataTyCon wordTyConKey pREL_ADDR SLIT("Word") [] [] [wordDataCon] -wordDataCon = pcDataCon wordDataConKey pREL_ADDR SLIT("W#") [] [] [wordPrimTy] wordTyCon +wordTyCon = pcNonRecDataTyCon wordTyConName [] [] [wordDataCon] +wordDataCon = pcDataCon wordDataConName [] [] [wordPrimTy] wordTyCon \end{code} \begin{code} addrTy = mkTyConTy addrTyCon -addrTyCon = pcNonRecDataTyCon addrTyConKey pREL_ADDR SLIT("Addr") [] [] [addrDataCon] -addrDataCon = pcDataCon addrDataConKey pREL_ADDR SLIT("A#") [] [] [addrPrimTy] addrTyCon +addrTyCon = pcNonRecDataTyCon addrTyConName [] [] [addrDataCon] +addrDataCon = pcDataCon addrDataConName [] [] [addrPrimTy] addrTyCon +\end{code} -isAddrTy :: Type -> Bool -isAddrTy ty - = case (splitAlgTyConApp_maybe ty) of - Just (tycon, [], _) -> getUnique tycon == addrTyConKey - _ -> False +\begin{code} +ptrTy = mkTyConTy ptrTyCon +ptrTyCon = pcNonRecDataTyCon ptrTyConName alpha_tyvar [(True,False)] [ptrDataCon] +ptrDataCon = pcDataCon ptrDataConName alpha_tyvar [] [addrPrimTy] ptrTyCon \end{code} \begin{code} -floatTy = mkTyConTy floatTyCon +funPtrTy = mkTyConTy funPtrTyCon -floatTyCon = pcNonRecDataTyCon floatTyConKey pREL_FLOAT SLIT("Float") [] [] [floatDataCon] -floatDataCon = pcDataCon floatDataConKey pREL_FLOAT SLIT("F#") [] [] [floatPrimTy] floatTyCon +funPtrTyCon = pcNonRecDataTyCon funPtrTyConName alpha_tyvar [(True,False)] [funPtrDataCon] +funPtrDataCon = pcDataCon funPtrDataConName alpha_tyvar [] [addrPrimTy] funPtrTyCon +\end{code} -isFloatTy :: Type -> Bool -isFloatTy ty - = case (splitAlgTyConApp_maybe ty) of - Just (tycon, [], _) -> getUnique tycon == floatTyConKey - _ -> False +\begin{code} +floatTy = mkTyConTy floatTyCon +floatTyCon = pcNonRecDataTyCon floatTyConName [] [] [floatDataCon] +floatDataCon = pcDataCon floatDataConName [] [] [floatPrimTy] floatTyCon \end{code} \begin{code} doubleTy = mkTyConTy doubleTyCon -isDoubleTy :: Type -> Bool -isDoubleTy ty - = case (splitAlgTyConApp_maybe ty) of - Just (tycon, [], _) -> getUnique tycon == doubleTyConKey - _ -> False - -doubleTyCon = pcNonRecDataTyCon doubleTyConKey pREL_FLOAT SLIT("Double") [] [] [doubleDataCon] -doubleDataCon = pcDataCon doubleDataConKey pREL_FLOAT SLIT("D#") [] [] [doublePrimTy] doubleTyCon +doubleTyCon = pcNonRecDataTyCon doubleTyConName [] [] [doubleDataCon] +doubleDataCon = pcDataCon doubleDataConName [] [] [doublePrimTy] doubleTyCon \end{code} \begin{code} stablePtrTyCon - = pcNonRecDataTyCon stablePtrTyConKey pREL_STABLE SLIT("StablePtr") + = pcNonRecDataTyCon stablePtrTyConName alpha_tyvar [(True,False)] [stablePtrDataCon] where stablePtrDataCon - = pcDataCon stablePtrDataConKey pREL_STABLE SLIT("StablePtr") + = pcDataCon stablePtrDataConName alpha_tyvar [] [mkStablePtrPrimTy alphaTy] stablePtrTyCon \end{code} \begin{code} foreignObjTyCon - = pcNonRecDataTyCon foreignObjTyConKey pREL_IO_BASE SLIT("ForeignObj") + = pcNonRecDataTyCon foreignObjTyConName [] [] [foreignObjDataCon] where foreignObjDataCon - = pcDataCon foreignObjDataConKey pREL_IO_BASE SLIT("ForeignObj") + = pcDataCon foreignObjDataConName [] [] [foreignObjPrimTy] foreignObjTyCon \end{code} +\begin{code} +foreignPtrTyCon + = pcNonRecDataTyCon foreignPtrTyConName + alpha_tyvar [(True,False)] [foreignPtrDataCon] + where + foreignPtrDataCon + = pcDataCon foreignPtrDataConName + alpha_tyvar [] [foreignObjPrimTy] foreignPtrTyCon +\end{code} + %************************************************************************ %* * \subsection[TysWiredIn-Integer]{@Integer@ and its related ``pairing'' types} @@ -372,20 +396,13 @@ foreignObjTyCon integerTy :: Type integerTy = mkTyConTy integerTyCon -integerTyCon = pcNonRecDataTyCon integerTyConKey pREL_NUM SLIT("Integer") +integerTyCon = pcNonRecDataTyCon integerTyConName [] [] [smallIntegerDataCon, largeIntegerDataCon] -smallIntegerDataCon = pcDataCon smallIntegerDataConKey pREL_NUM SLIT("S#") +smallIntegerDataCon = pcDataCon smallIntegerDataConName [] [] [intPrimTy] integerTyCon -largeIntegerDataCon = pcDataCon largeIntegerDataConKey pREL_NUM SLIT("J#") +largeIntegerDataCon = pcDataCon largeIntegerDataConName [] [] [intPrimTy, byteArrayPrimTy] integerTyCon - - -isIntegerTy :: Type -> Bool -isIntegerTy ty - = case (splitAlgTyConApp_maybe ty) of - Just (tycon, [], _) -> getUnique tycon == integerTyConKey - _ -> False \end{code} @@ -400,76 +417,106 @@ restricted set of types as arguments and results (the restricting factor being the ) \begin{code} -isFFIArgumentTy :: Bool -> Type -> Bool -isFFIArgumentTy forASafeCall ty = - (opt_GlasgowExts && isUnLiftedType ty) || - case (splitAlgTyConApp_maybe ty) of - Just (tycon, _, _) -> - let - u = getUnique tycon - in - u `elem` primArgTyConKeys && -- it has a suitable prim type, and - (not forASafeCall || not ( u `elem` notSafeExternalTyCons)) -- it is safe to pass out. - _ -> False - --- types that can be passed as arguments to "foreign" functions -primArgTyConKeys - = [ intTyConKey, int8TyConKey, int16TyConKey, int32TyConKey, int64TyConKey - , wordTyConKey, word8TyConKey, word16TyConKey, word32TyConKey, word64TyConKey - , floatTyConKey, doubleTyConKey - , addrTyConKey, charTyConKey, foreignObjTyConKey - , stablePtrTyConKey - , byteArrayTyConKey, mutableByteArrayTyConKey - ] - --- types that can be passed from the outside world into Haskell. --- excludes (mutable) byteArrays. -isFFIExternalTy :: Type -> Bool -isFFIExternalTy ty = - (opt_GlasgowExts && isUnLiftedType ty) || --leave out for now: maybeToBool (maybeBoxedPrimType ty))) || - case (splitAlgTyConApp_maybe ty) of - Just (tycon, _, _) -> - let - u_tycon = getUnique tycon - in - (u_tycon `elem` primArgTyConKeys) && - not (u_tycon `elem` notLegalExternalTyCons) - _ -> False - - -isFFIResultTy :: Type -> Bool -isFFIResultTy ty = - not (isUnLiftedType ty) && - case (splitAlgTyConApp_maybe ty) of - Just (tycon, _, _) -> - let - u_tycon = getUnique tycon - in - (u_tycon == getUnique unitTyCon) || - ((u_tycon `elem` primArgTyConKeys) && - not (u_tycon `elem` notLegalExternalTyCons)) - _ -> False - --- it's illegal to return foreign objects and (mutable) --- bytearrays from a _ccall_ / foreign declaration --- (or be passed them as arguments in foreign exported functions). -notLegalExternalTyCons = - [ foreignObjTyConKey, byteArrayTyConKey, mutableByteArrayTyConKey ] +isFFIArgumentTy :: DynFlags -> Safety -> Type -> Bool +-- Checks for valid argument type for a 'foreign import' +isFFIArgumentTy dflags safety ty + = checkRepTyCon (legalOutgoingTyCon dflags safety) ty --- it's really unsafe to pass out references to objects in the heap, --- so for safe call-outs we simply disallow it. -notSafeExternalTyCons = - [ byteArrayTyConKey, mutableByteArrayTyConKey ] +isFFIExternalTy :: Type -> Bool +-- Types that are allowed as arguments of a 'foreign export' +isFFIExternalTy ty = checkRepTyCon legalFEArgTyCon ty + +isFFIImportResultTy :: DynFlags -> Type -> Bool +isFFIImportResultTy dflags ty + = checkRepTyCon (legalFIResultTyCon dflags) ty + +isFFIExportResultTy :: Type -> Bool +isFFIExportResultTy ty = checkRepTyCon legalFEResultTyCon ty + +isFFIDynArgumentTy :: Type -> Bool +-- The argument type of a foreign import dynamic must be Ptr, FunPtr, Addr, +-- or a newtype of either. +isFFIDynArgumentTy = checkRepTyCon (\tc -> tc == ptrTyCon || tc == funPtrTyCon || tc == addrTyCon) + +isFFIDynResultTy :: Type -> Bool +-- The result type of a foreign export dynamic must be Ptr, FunPtr, Addr, +-- or a newtype of either. +isFFIDynResultTy = checkRepTyCon (\tc -> tc == ptrTyCon || tc == funPtrTyCon || tc == addrTyCon) + +isFFILabelTy :: Type -> Bool +-- The type of a foreign label must be Ptr, FunPtr, Addr, +-- or a newtype of either. +isFFILabelTy = checkRepTyCon (\tc -> tc == ptrTyCon || tc == funPtrTyCon || tc == addrTyCon) + +checkRepTyCon :: (TyCon -> Bool) -> Type -> Bool + -- Look through newtypes +checkRepTyCon check_tc ty = case splitTyConApp_maybe ty of + Just (tycon, _) -> check_tc tycon + Nothing -> False +\end{code} +---------------------------------------------- +These chaps do the work; they are not exported +---------------------------------------------- -isForeignObjTy :: Type -> Bool -isForeignObjTy ty = - case (splitAlgTyConApp_maybe ty) of - Just (tycon, _, _) -> (getUnique tycon) == foreignObjTyConKey - _ -> False - +\begin{code} +legalFEArgTyCon :: TyCon -> Bool +-- It's illegal to return foreign objects and (mutable) +-- bytearrays from a _ccall_ / foreign declaration +-- (or be passed them as arguments in foreign exported functions). +legalFEArgTyCon tc + | getUnique tc `elem` [ foreignObjTyConKey, foreignPtrTyConKey, + byteArrayTyConKey, mutableByteArrayTyConKey ] + = False + -- It's also illegal to make foreign exports that take unboxed + -- arguments. The RTS API currently can't invoke such things. --SDM 7/2000 + | otherwise + = boxedMarshalableTyCon tc + +legalFIResultTyCon :: DynFlags -> TyCon -> Bool +legalFIResultTyCon dflags tc + | getUnique tc `elem` + [ foreignObjTyConKey, foreignPtrTyConKey, + byteArrayTyConKey, mutableByteArrayTyConKey ] = False + | tc == unitTyCon = True + | otherwise = marshalableTyCon dflags tc + +legalFEResultTyCon :: TyCon -> Bool +legalFEResultTyCon tc + | getUnique tc `elem` + [ foreignObjTyConKey, foreignPtrTyConKey, + byteArrayTyConKey, mutableByteArrayTyConKey ] = False + | tc == unitTyCon = True + | otherwise = boxedMarshalableTyCon tc + +legalOutgoingTyCon :: DynFlags -> Safety -> TyCon -> Bool +-- Checks validity of types going from Haskell -> external world +legalOutgoingTyCon dflags safety tc + | playSafe safety && getUnique tc `elem` [byteArrayTyConKey, mutableByteArrayTyConKey] + = False + | otherwise + = marshalableTyCon dflags tc + +marshalableTyCon dflags tc + = (dopt Opt_GlasgowExts dflags && isUnLiftedTyCon tc) + || boxedMarshalableTyCon tc + +boxedMarshalableTyCon tc + = getUnique tc `elem` [ intTyConKey, int8TyConKey, int16TyConKey + , int32TyConKey, int64TyConKey + , wordTyConKey, word8TyConKey, word16TyConKey + , word32TyConKey, word64TyConKey + , floatTyConKey, doubleTyConKey + , addrTyConKey, ptrTyConKey, funPtrTyConKey + , charTyConKey, foreignObjTyConKey + , foreignPtrTyConKey + , stablePtrTyConKey + , byteArrayTyConKey, mutableByteArrayTyConKey + , boolTyConKey + ] \end{code} + %************************************************************************ %* * \subsection[TysWiredIn-Bool]{The @Bool@ type} @@ -521,11 +568,14 @@ primitive counterpart. \begin{code} boolTy = mkTyConTy boolTyCon -boolTyCon = pcTyCon EnumType NonRecursive boolTyConKey - pREL_BASE SLIT("Bool") [] [] [falseDataCon, trueDataCon] +boolTyCon = pcTyCon EnumTyCon NonRecursive boolTyConName + [] [] [falseDataCon, trueDataCon] + +falseDataCon = pcDataCon falseDataConName [] [] [] boolTyCon +trueDataCon = pcDataCon trueDataConName [] [] [] boolTyCon -falseDataCon = pcDataCon falseDataConKey pREL_BASE SLIT("False") [] [] [] boolTyCon -trueDataCon = pcDataCon trueDataConKey pREL_BASE SLIT("True") [] [] [] boolTyCon +falseDataConId = dataConId falseDataCon +trueDataConId = dataConId trueDataCon \end{code} %************************************************************************ @@ -547,14 +597,12 @@ data (,) a b = (,,) a b mkListTy :: Type -> Type mkListTy ty = mkTyConApp listTyCon [ty] -alphaListTy = mkSigmaTy alpha_tyvar [] (mkTyConApp listTyCon alpha_ty) - -listTyCon = pcRecDataTyCon listTyConKey pREL_BASE SLIT("[]") +listTyCon = pcRecDataTyCon listTyConName alpha_tyvar [(True,False)] [nilDataCon, consDataCon] -nilDataCon = pcDataCon nilDataConKey pREL_BASE SLIT("[]") alpha_tyvar [] [] listTyCon -consDataCon = pcDataCon consDataConKey pREL_BASE SLIT(":") - alpha_tyvar [] [alphaTy, mkTyConApp listTyCon alpha_ty] listTyCon +nilDataCon = pcDataCon nilDataConName alpha_tyvar [] [] listTyCon +consDataCon = pcDataCon consDataConName + alpha_tyvar [] [alphaTy, mkTyConApp listTyCon alpha_ty] listTyCon -- Interesting: polymorphic recursion would help here. -- We can't use (mkListTy alphaTy) in the defn of consDataCon, else mkListTy -- gets the over-specific type (Type -> Type) @@ -607,11 +655,43 @@ done by enumeration\srcloc{lib/prelude/InTup?.hs}. \end{itemize} \begin{code} -mkTupleTy :: Int -> [Type] -> Type -mkTupleTy arity tys = mkTyConApp (tupleTyCon arity) tys +mkTupleTy :: Boxity -> Int -> [Type] -> Type +mkTupleTy boxity arity tys = mkTyConApp (tupleTyCon boxity arity) tys + +unitTy = mkTupleTy Boxed 0 [] +\end{code} + +%************************************************************************ +%* * +\subsection{Wired In Type Constructors for Representation Types} +%* * +%************************************************************************ + +The following code defines the wired in datatypes cross, plus, unit +and c_of needed for the generic methods. + +Ok, so the basic story is that for each type constructor I need to +create 2 things - a TyCon and a DataCon and then we are basically +ok. There are going to be no arguments passed to these functions +because -well- there is nothing to pass to these functions. + +\begin{code} +crossTyCon :: TyCon +crossTyCon = pcNonRecDataTyCon crossTyConName alpha_beta_tyvars [] [crossDataCon] + +crossDataCon :: DataCon +crossDataCon = pcDataCon crossDataConName alpha_beta_tyvars [] [alphaTy, betaTy] crossTyCon + +plusTyCon :: TyCon +plusTyCon = pcNonRecDataTyCon plusTyConName alpha_beta_tyvars [] [inlDataCon, inrDataCon] + +inlDataCon, inrDataCon :: DataCon +inlDataCon = pcDataCon inlDataConName alpha_beta_tyvars [] [alphaTy] plusTyCon +inrDataCon = pcDataCon inrDataConName alpha_beta_tyvars [] [betaTy] plusTyCon -mkUnboxedTupleTy :: Int -> [Type] -> Type -mkUnboxedTupleTy arity tys = mkTyConApp (unboxedTupleTyCon arity) tys +genUnitTyCon :: TyCon -- The "1" type constructor for generics +genUnitTyCon = pcNonRecDataTyCon genUnitTyConName [] [] [genUnitDataCon] -unitTy = mkTupleTy 0 [] +genUnitDataCon :: DataCon +genUnitDataCon = pcDataCon genUnitDataConName [] [] [] genUnitTyCon \end{code}