X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fprelude%2FTysWiredIn.lhs;h=afd537f1a39808e3b973b99402f4d439b32979d0;hb=6eca2acf184d4911123193757bdd38e53caa3467;hp=2f78305668da397f35b26d97ec21d055d09ab0b3;hpb=9dd6e1c216993624a2cd74b62ca0f0569c02c26b;p=ghc-hetmet.git diff --git a/ghc/compiler/prelude/TysWiredIn.lhs b/ghc/compiler/prelude/TysWiredIn.lhs index 2f78305..afd537f 100644 --- a/ghc/compiler/prelude/TysWiredIn.lhs +++ b/ghc/compiler/prelude/TysWiredIn.lhs @@ -1,5 +1,5 @@ % -% (c) The GRASP Project, Glasgow University, 1994-1995 +% (c) The GRASP Project, Glasgow University, 1994-1998 % \section[TysWiredIn]{Wired-in knowledge about {\em non-primitive} types} @@ -11,6 +11,8 @@ types and operations.'' \begin{code} module TysWiredIn ( + wiredInTyCons, genericTyCons, + addrDataCon, addrTy, addrTyCon, @@ -22,142 +24,193 @@ module TysWiredIn ( consDataCon, doubleDataCon, doubleTy, + isDoubleTy, doubleTyCon, - falseDataCon, + falseDataCon, falseDataConId, floatDataCon, floatTy, + isFloatTy, floatTyCon, - getStatePairingConInfo, intDataCon, intTy, intTyCon, isIntTy, - inIntRange, integerTy, integerTyCon, - integerDataCon, + smallIntegerDataCon, + largeIntegerDataCon, isIntegerTy, - liftDataCon, - liftTyCon, listTyCon, - foreignObjTyCon, - mkLiftTy, mkListTy, - mkTupleTy, - tupleTyCon, tupleCon, unitTyCon, unitDataCon, pairTyCon, pairDataCon, nilDataCon, - realWorldStateTy, - return2GMPsTyCon, - returnIntAndGMPTyCon, - - -- ST and STret types - mkStateTy, - mkStateTransformerTy, - mkSTretTy, - stTyCon, - stDataCon, - stRetDataCon, - stRetTyCon, - - -- CCall result types - stateAndAddrPrimTyCon, - stateAndArrayPrimTyCon, - stateAndByteArrayPrimTyCon, - stateAndCharPrimTyCon, - stateAndDoublePrimTyCon, - stateAndFloatPrimTyCon, - stateAndIntPrimTyCon, - stateAndForeignObjPrimTyCon, - stateAndMutableArrayPrimTyCon, - stateAndMutableByteArrayPrimTyCon, - stateAndPtrPrimTyCon, - stateAndStablePtrPrimTyCon, - stateAndSynchVarPrimTyCon, - stateAndWordPrimTyCon, - stateDataCon, - stateTyCon, + + -- tuples + mkTupleTy, + 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 + wordTyCon, + + isFFIArgumentTy, -- :: Bool -> Type -> Bool + isFFIResultTy, -- :: Type -> Bool + isFFIExternalTy, -- :: Type -> Bool + isFFIDynArgumentTy, -- :: Type -> Bool + isFFIDynResultTy, -- :: Type -> Bool + isFFILabelTy, -- :: Type -> Bool + isAddrTy, -- :: Type -> Bool + isForeignObjTy -- :: Type -> Bool + ) where #include "HsVersions.h" -import {-# SOURCE #-} Id ( Id, mkDataCon, mkTupleCon, StrictnessMark(..) ) +import {-# SOURCE #-} MkId( mkDataConId, mkDataConWrapId ) +import {-# SOURCE #-} Generics( mkTyConGenInfo ) -- friends: -import PrelMods +import PrelNames import TysPrim -- others: -import Kind ( mkBoxedTypeKind, mkArrowKind ) -import Name ( mkWiredInTyConName, mkWiredInIdName ) -import TyCon ( mkDataTyCon, mkTupleTyCon, mkSynTyCon, - TyCon, Arity +import Constants ( mAX_TUPLE_SIZE ) +import Module ( Module, mkPrelModule ) +import Name ( mkWiredInTyConName, mkWiredInIdName, nameOccName ) +import OccName ( mkOccFS, tcName, dataName, mkWorkerOcc, mkGenOcc1, mkGenOcc2 ) +import RdrName ( RdrName, mkPreludeQual, rdrNameOcc, rdrNameModule ) +import DataCon ( DataCon, StrictnessMark(..), mkDataCon, dataConId ) +import Var ( TyVar, tyVarKind ) +import TyCon ( TyCon, AlgTyConFlavour(..), ArgVrcs, tyConDataCons, + mkSynTyCon, mkTupleTyCon, + isUnLiftedTyCon, mkAlgTyConRep,tyConName ) -import BasicTypes ( Module, NewOrData(..), RecFlag(..) ) + +import BasicTypes ( Arity, RecFlag(..), EP(..), Boxity(..), isBoxed ) + import Type ( Type, mkTyConTy, mkTyConApp, mkSigmaTy, mkTyVarTys, - mkFunTy, mkFunTys, splitTyConApp_maybe, splitAlgTyConApp_maybe, - GenType(..), ThetaType, TauType ) -import TyVar ( GenTyVar, TyVar, tyVarKind, alphaTyVars, alphaTyVar, betaTyVar ) -import Lex ( mkTupNameStr ) -import Unique -import Util ( assoc, panic ) + mkArrowKinds, boxedTypeKind, unboxedTypeKind, + mkFunTy, mkFunTys, + splitTyConApp_maybe, repType, mkTyVarTy, + TauType, ClassContext ) +import Unique ( incrUnique, mkTupleTyConUnique, mkTupleDataConUnique ) +import PrelNames +import CmdLineOpts ( DynFlags, dopt_GlasgowExts ) +import Array +import Maybe ( fromJust ) +import FiniteMap ( lookupFM ) alpha_tyvar = [alphaTyVar] alpha_ty = [alphaTy] alpha_beta_tyvars = [alphaTyVar, betaTyVar] +\end{code} -pcRecDataTyCon, pcNonRecDataTyCon, pcNonRecNewTyCon - :: Unique{-TyConKey-} -> Module -> FAST_STRING - -> [TyVar] -> [Id] -> TyCon -pcRecDataTyCon = pc_tycon DataType Recursive -pcNonRecDataTyCon = pc_tycon DataType NonRecursive -pcNonRecNewTyCon = pc_tycon NewType NonRecursive +%************************************************************************ +%* * +\subsection{Wired in type constructors} +%* * +%************************************************************************ -pc_tycon new_or_data is_rec key mod str tyvars cons - = tycon - where - tycon = mkDataTyCon name tycon_kind - tyvars - [] -- No context - cons - [] -- No derivings - Nothing -- Not a dictionary - new_or_data - is_rec - - name = mkWiredInTyConName key mod str tycon - tycon_kind = foldr (mkArrowKind . tyVarKind) mkBoxedTypeKind tyvars - -pcSynTyCon key mod str kind arity tyvars expansion +\begin{code} +wiredInTyCons :: [TyCon] +wiredInTyCons = data_tycons ++ tuple_tycons ++ unboxed_tuple_tycons + +data_tycons = genericTyCons ++ + [ addrTyCon + , boolTyCon + , charTyCon + , doubleTyCon + , floatTyCon + , intTyCon + , integerTyCon + , listTyCon + , wordTyCon + ] + +genericTyCons :: [TyCon] +genericTyCons = [ plusTyCon, crossTyCon, genUnitTyCon ] + + +tuple_tycons = unitTyCon : [tupleTyCon Boxed i | i <- [2..37] ] +unboxed_tuple_tycons = [tupleTyCon Unboxed i | i <- [1..37] ] +\end{code} + + +%************************************************************************ +%* * +\subsection{mkWiredInTyCon} +%* * +%************************************************************************ + +\begin{code} +pcNonRecDataTyCon = pcTyCon DataTyCon NonRecursive +pcRecDataTyCon = pcTyCon DataTyCon Recursive + +pcTyCon new_or_data is_rec key rdr_name tyvars argvrcs cons = tycon where - tycon = mkSynTyCon name kind arity tyvars expansion - name = mkWiredInTyConName key mod str tycon - -pcDataCon :: Unique{-DataConKey-} -> Module -> FAST_STRING - -> [TyVar] -> ThetaType -> [TauType] -> TyCon -> Id -pcDataCon key mod str tyvars context arg_tys tycon + tycon = mkAlgTyConRep name kind + tyvars + [] -- No context + argvrcs + cons + (length cons) + [] -- No derivings + new_or_data + is_rec + gen_info + + mod = mkPrelModule (rdrNameModule rdr_name) + occ = rdrNameOcc rdr_name + name = mkWiredInTyConName key mod occ tycon + kind = mkArrowKinds (map tyVarKind tyvars) boxedTypeKind + gen_info = mk_tc_gen_info mod key name tycon + +pcDataCon :: Unique -- DataConKey + -> RdrName -- Qualified + -> [TyVar] -> ClassContext -> [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 wrap_key rdr_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 - name = mkWiredInIdName key mod str data_con + mod = mkPrelModule (rdrNameModule rdr_name) + wrap_occ = rdrNameOcc rdr_name + + data_con = mkDataCon wrap_name + [ NotMarkedStrict | a <- arg_tys ] + [ {- no labelled fields -} ] + tyvars context [] [] arg_tys tycon work_id wrap_id + + work_occ = mkWorkerOcc wrap_occ + work_key = incrUnique wrap_key + work_name = mkWiredInIdName work_key mod work_occ work_id + work_id = mkDataConId work_name data_con + + wrap_name = mkWiredInIdName wrap_key mod wrap_occ wrap_id + wrap_id = mkDataConWrapId data_con \end{code} + %************************************************************************ %* * \subsection[TysWiredIn-tuples]{The tuple types} @@ -165,38 +218,66 @@ pcDataCon key mod str tyvars context arg_tys tycon %************************************************************************ \begin{code} -tupleTyCon :: Arity -> TyCon -tupleTyCon arity - = tycon +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 uniq name arity - uniq = mkTupleTyConUnique arity - name = mkWiredInTyConName uniq mod_name (mkTupNameStr arity) tycon - mod_name | arity == 0 = pREL_BASE - | otherwise = pREL_TUP - -tupleCon :: Arity -> Id -tupleCon arity - = tuple_con + tycon = mkTupleTyCon tc_name tc_kind arity tyvars tuple_con boxity gen_info + tc_name = mkWiredInTyConName tc_uniq mod (mkOccFS tcName name_str) tycon + tc_kind = mkArrowKinds (map tyVarKind tyvars) res_kind + res_kind | isBoxed boxity = boxedTypeKind + | otherwise = unboxedTypeKind + + tyvars | isBoxed boxity = take arity alphaTyVars + | otherwise = take arity openAlphaTyVars + + tuple_con = pcDataCon dc_uniq rdr_name tyvars [] tyvar_tys tycon + tyvar_tys = mkTyVarTys tyvars + (mod_name, name_str) = mkTupNameStr boxity arity + rdr_name = mkPreludeQual dataName mod_name name_str + 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 + +mk_tc_gen_info mod tc_uniq tc_name tycon + = gen_info where - tuple_con = mkTupleCon arity name ty - uniq = mkTupleDataConUnique arity - name = mkWiredInIdName uniq mod_name (mkTupNameStr arity) tuple_con - mod_name | arity == 0 = pREL_BASE - | otherwise = pREL_TUP - ty = mkSigmaTy tyvars [] (mkFunTys tyvar_tys (mkTyConApp tycon tyvar_tys)) - tyvars = take arity alphaTyVars - tyvar_tys = mkTyVarTys tyvars - tycon = tupleTyCon arity - -unitTyCon = tupleTyCon 0 -pairTyCon = tupleTyCon 2 - -unitDataCon = tupleCon 0 -pairDataCon = tupleCon 2 + 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 = mkWiredInIdName fn1_key mod occ_name1 id1 + name2 = mkWiredInIdName fn2_key mod occ_name2 id2 + gen_info = mkTyConGenInfo tycon name1 name2 + Just (EP id1 id2) = gen_info + +unitTyCon = tupleTyCon Boxed 0 +unitDataConId = dataConId (head (tyConDataCons unitTyCon)) + +pairTyCon = tupleTyCon Boxed 2 + +unboxedSingletonTyCon = tupleTyCon Unboxed 1 +unboxedSingletonDataCon = tupleCon Unboxed 1 + +unboxedPairTyCon = tupleTyCon Unboxed 2 +unboxedPairDataCon = tupleCon Unboxed 2 \end{code} - %************************************************************************ %* * \subsection[TysWiredIn-boxed-prim]{The ``boxed primitive'' types (@Char@, @Int@, etc)} @@ -204,10 +285,26 @@ pairDataCon = tupleCon 2 %************************************************************************ \begin{code} +-- The Void type is represented as a data type with no constructors +-- It's a built in type (i.e. there's no way to define it in Haskell; +-- the nearest would be +-- +-- data Void = -- No constructors! +-- +-- ) It's boxed; 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' +-- voidTy using (). +voidTy = unitTy +\end{code} + + +\begin{code} charTy = mkTyConTy charTyCon -charTyCon = pcNonRecDataTyCon charTyConKey pREL_BASE SLIT("Char") [] [charDataCon] -charDataCon = pcDataCon charDataConKey pREL_BASE SLIT("C#") [] [] [charPrimTy] charTyCon +charTyCon = pcNonRecDataTyCon charTyConKey charTyCon_RDR [] [] [charDataCon] +charDataCon = pcDataCon charDataConKey charDataCon_RDR [] [] [charPrimTy] charTyCon stringTy = mkListTy charTy -- convenience only \end{code} @@ -215,79 +312,72 @@ 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 :: GenType flexi -> Bool -isIntTy ty - = case (splitAlgTyConApp_maybe ty) of - Just (tycon, [], _) -> uniqueOf tycon == intTyConKey - _ -> False +intTyCon = pcNonRecDataTyCon intTyConKey intTyCon_RDR [] [] [intDataCon] +intDataCon = pcDataCon intDataConKey mkInt_RDR [] [] [intPrimTy] intTyCon -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 +isIntTy :: Type -> Bool +isIntTy = isTyCon intTyConKey \end{code} \begin{code} + wordTy = mkTyConTy wordTyCon -wordTyCon = pcNonRecDataTyCon wordTyConKey fOREIGN SLIT("Word") [] [wordDataCon] -wordDataCon = pcDataCon wordDataConKey fOREIGN SLIT("W#") [] [] [wordPrimTy] wordTyCon +wordTyCon = pcNonRecDataTyCon wordTyConKey wordTyCon_RDR [] [] [wordDataCon] +wordDataCon = pcDataCon wordDataConKey wordDataCon_RDR [] [] [wordPrimTy] wordTyCon \end{code} \begin{code} addrTy = mkTyConTy addrTyCon -addrTyCon = pcNonRecDataTyCon addrTyConKey aDDR SLIT("Addr") [] [addrDataCon] -addrDataCon = pcDataCon addrDataConKey aDDR SLIT("A#") [] [] [addrPrimTy] addrTyCon +addrTyCon = pcNonRecDataTyCon addrTyConKey addrTyCon_RDR [] [] [addrDataCon] +addrDataCon = pcDataCon addrDataConKey addrDataCon_RDR [] [] [addrPrimTy] addrTyCon + +isAddrTy :: Type -> Bool +isAddrTy = isTyCon addrTyConKey \end{code} \begin{code} floatTy = mkTyConTy floatTyCon -floatTyCon = pcNonRecDataTyCon floatTyConKey pREL_BASE SLIT("Float") [] [floatDataCon] -floatDataCon = pcDataCon floatDataConKey pREL_BASE SLIT("F#") [] [] [floatPrimTy] floatTyCon +floatTyCon = pcNonRecDataTyCon floatTyConKey floatTyCon_RDR [] [] [floatDataCon] +floatDataCon = pcDataCon floatDataConKey floatDataCon_RDR [] [] [floatPrimTy] floatTyCon + +isFloatTy :: Type -> Bool +isFloatTy = isTyCon floatTyConKey \end{code} \begin{code} doubleTy = mkTyConTy doubleTyCon -doubleTyCon = pcNonRecDataTyCon doubleTyConKey pREL_BASE SLIT("Double") [] [doubleDataCon] -doubleDataCon = pcDataCon doubleDataConKey pREL_BASE SLIT("D#") [] [] [doublePrimTy] doubleTyCon -\end{code} +isDoubleTy :: Type -> Bool +isDoubleTy = isTyCon doubleTyConKey -\begin{code} -mkStateTy ty = mkTyConApp stateTyCon [ty] -realWorldStateTy = mkStateTy realWorldTy -- a common use - -stateTyCon = pcNonRecDataTyCon stateTyConKey sT_BASE SLIT("State") alpha_tyvar [stateDataCon] -stateDataCon - = pcDataCon stateDataConKey sT_BASE SLIT("S#") - alpha_tyvar [] [mkStatePrimTy alphaTy] stateTyCon +doubleTyCon = pcNonRecDataTyCon doubleTyConKey doubleTyCon_RDR [] [] [doubleDataCon] +doubleDataCon = pcDataCon doubleDataConKey doubleDataCon_RDR [] [] [doublePrimTy] doubleTyCon \end{code} \begin{code} stablePtrTyCon - = pcNonRecDataTyCon stablePtrTyConKey fOREIGN SLIT("StablePtr") - alpha_tyvar [stablePtrDataCon] + = pcNonRecDataTyCon stablePtrTyConKey stablePtrTyCon_RDR + alpha_tyvar [(True,False)] [stablePtrDataCon] where stablePtrDataCon - = pcDataCon stablePtrDataConKey fOREIGN SLIT("StablePtr") + = pcDataCon stablePtrDataConKey stablePtrDataCon_RDR alpha_tyvar [] [mkStablePtrPrimTy alphaTy] stablePtrTyCon \end{code} \begin{code} foreignObjTyCon - = pcNonRecDataTyCon foreignObjTyConKey fOREIGN SLIT("ForeignObj") - [] [foreignObjDataCon] + = pcNonRecDataTyCon foreignObjTyConKey foreignObjTyCon_RDR + [] [] [foreignObjDataCon] where foreignObjDataCon - = pcDataCon foreignObjDataConKey fOREIGN SLIT("ForeignObj") + = pcDataCon foreignObjDataConKey foreignObjDataCon_RDR [] [] [foreignObjPrimTy] foreignObjTyCon + +isForeignObjTy :: Type -> Bool +isForeignObjTy = isTyCon foreignObjTyConKey \end{code} %************************************************************************ @@ -298,237 +388,121 @@ foreignObjTyCon @Integer@ and its pals are not really primitive. @Integer@ itself, first: \begin{code} -integerTy :: GenType t -integerTy = mkTyConTy integerTyCon +integerTy :: Type +integerTy = mkTyConTy integerTyCon -integerTyCon = pcNonRecDataTyCon integerTyConKey pREL_BASE SLIT("Integer") [] [integerDataCon] +integerTyCon = pcNonRecDataTyCon integerTyConKey integerTyCon_RDR + [] [] [smallIntegerDataCon, largeIntegerDataCon] -integerDataCon = pcDataCon integerDataConKey pREL_BASE SLIT("J#") - [] [] [intPrimTy, intPrimTy, byteArrayPrimTy] integerTyCon +smallIntegerDataCon = pcDataCon smallIntegerDataConKey smallIntegerDataCon_RDR + [] [] [intPrimTy] integerTyCon +largeIntegerDataCon = pcDataCon largeIntegerDataConKey largeIntegerDataCon_RDR + [] [] [intPrimTy, byteArrayPrimTy] integerTyCon -isIntegerTy :: GenType flexi -> Bool -isIntegerTy ty - = case (splitAlgTyConApp_maybe ty) of - Just (tycon, [], _) -> uniqueOf tycon == integerTyConKey - _ -> False -\end{code} - -And the other pairing types: -\begin{code} -return2GMPsTyCon = pcNonRecDataTyCon return2GMPsTyConKey - pREL_NUM SLIT("Return2GMPs") [] [return2GMPsDataCon] -return2GMPsDataCon - = pcDataCon return2GMPsDataConKey pREL_NUM SLIT("Return2GMPs") [] [] - [intPrimTy, intPrimTy, byteArrayPrimTy, - intPrimTy, intPrimTy, byteArrayPrimTy] return2GMPsTyCon - -returnIntAndGMPTyCon = pcNonRecDataTyCon returnIntAndGMPTyConKey - pREL_NUM SLIT("ReturnIntAndGMP") [] [returnIntAndGMPDataCon] - -returnIntAndGMPDataCon - = pcDataCon returnIntAndGMPDataConKey pREL_NUM SLIT("ReturnIntAndGMP") [] [] - [intPrimTy, intPrimTy, intPrimTy, byteArrayPrimTy] returnIntAndGMPTyCon +isIntegerTy :: Type -> Bool +isIntegerTy = isTyCon integerTyConKey \end{code} + %************************************************************************ %* * -\subsection[TysWiredIn-state-pairing]{``State-pairing'' types} +\subsection[TysWiredIn-ext-type]{External types} %* * %************************************************************************ -These boring types pair a \tr{State#} with another primitive type. -They are not really primitive, so they are given here, not in -\tr{TysPrim.lhs}. - -We fish one of these \tr{StateAnd#} things with -@getStatePairingConInfo@ (given a little way down). +The compiler's foreign function interface supports the passing of a +restricted set of types as arguments and results (the restricting factor +being the ) \begin{code} -stateAndPtrPrimTyCon - = pcNonRecDataTyCon stateAndPtrPrimTyConKey sT_BASE SLIT("StateAndPtr#") - alpha_beta_tyvars [stateAndPtrPrimDataCon] -stateAndPtrPrimDataCon - = pcDataCon stateAndPtrPrimDataConKey sT_BASE SLIT("StateAndPtr#") - alpha_beta_tyvars [] [mkStatePrimTy alphaTy, betaTy] - stateAndPtrPrimTyCon - -stateAndCharPrimTyCon - = pcNonRecDataTyCon stateAndCharPrimTyConKey sT_BASE SLIT("StateAndChar#") - alpha_tyvar [stateAndCharPrimDataCon] -stateAndCharPrimDataCon - = pcDataCon stateAndCharPrimDataConKey sT_BASE SLIT("StateAndChar#") - alpha_tyvar [] [mkStatePrimTy alphaTy, charPrimTy] - stateAndCharPrimTyCon - -stateAndIntPrimTyCon - = pcNonRecDataTyCon stateAndIntPrimTyConKey sT_BASE SLIT("StateAndInt#") - alpha_tyvar [stateAndIntPrimDataCon] -stateAndIntPrimDataCon - = pcDataCon stateAndIntPrimDataConKey sT_BASE SLIT("StateAndInt#") - alpha_tyvar [] [mkStatePrimTy alphaTy, intPrimTy] - stateAndIntPrimTyCon - -stateAndWordPrimTyCon - = pcNonRecDataTyCon stateAndWordPrimTyConKey sT_BASE SLIT("StateAndWord#") - alpha_tyvar [stateAndWordPrimDataCon] -stateAndWordPrimDataCon - = pcDataCon stateAndWordPrimDataConKey sT_BASE SLIT("StateAndWord#") - alpha_tyvar [] [mkStatePrimTy alphaTy, wordPrimTy] - stateAndWordPrimTyCon - -stateAndAddrPrimTyCon - = pcNonRecDataTyCon stateAndAddrPrimTyConKey sT_BASE SLIT("StateAndAddr#") - alpha_tyvar [stateAndAddrPrimDataCon] -stateAndAddrPrimDataCon - = pcDataCon stateAndAddrPrimDataConKey sT_BASE SLIT("StateAndAddr#") - alpha_tyvar [] [mkStatePrimTy alphaTy, addrPrimTy] - stateAndAddrPrimTyCon - -stateAndStablePtrPrimTyCon - = pcNonRecDataTyCon stateAndStablePtrPrimTyConKey fOREIGN SLIT("StateAndStablePtr#") - alpha_beta_tyvars [stateAndStablePtrPrimDataCon] -stateAndStablePtrPrimDataCon - = pcDataCon stateAndStablePtrPrimDataConKey fOREIGN SLIT("StateAndStablePtr#") - alpha_beta_tyvars [] - [mkStatePrimTy alphaTy, mkTyConApp stablePtrPrimTyCon [betaTy]] - stateAndStablePtrPrimTyCon - -stateAndForeignObjPrimTyCon - = pcNonRecDataTyCon stateAndForeignObjPrimTyConKey fOREIGN SLIT("StateAndForeignObj#") - alpha_tyvar [stateAndForeignObjPrimDataCon] -stateAndForeignObjPrimDataCon - = pcDataCon stateAndForeignObjPrimDataConKey fOREIGN SLIT("StateAndForeignObj#") - alpha_tyvar [] - [mkStatePrimTy alphaTy, mkTyConTy foreignObjPrimTyCon] - stateAndForeignObjPrimTyCon - -stateAndFloatPrimTyCon - = pcNonRecDataTyCon stateAndFloatPrimTyConKey sT_BASE SLIT("StateAndFloat#") - alpha_tyvar [stateAndFloatPrimDataCon] -stateAndFloatPrimDataCon - = pcDataCon stateAndFloatPrimDataConKey sT_BASE SLIT("StateAndFloat#") - alpha_tyvar [] [mkStatePrimTy alphaTy, floatPrimTy] - stateAndFloatPrimTyCon - -stateAndDoublePrimTyCon - = pcNonRecDataTyCon stateAndDoublePrimTyConKey sT_BASE SLIT("StateAndDouble#") - alpha_tyvar [stateAndDoublePrimDataCon] -stateAndDoublePrimDataCon - = pcDataCon stateAndDoublePrimDataConKey sT_BASE SLIT("StateAndDouble#") - alpha_tyvar [] [mkStatePrimTy alphaTy, doublePrimTy] - stateAndDoublePrimTyCon +isFFIArgumentTy :: DynFlags -> Bool -> Type -> Bool +-- Checks for valid argument type for a 'foreign import' +isFFIArgumentTy dflags is_safe ty + = checkRepTyCon (legalOutgoingTyCon dflags is_safe) ty + +isFFIExternalTy :: Type -> Bool +-- Types that are allowed as arguments of a 'foreign export' +isFFIExternalTy ty = checkRepTyCon legalIncomingTyCon ty + +isFFIResultTy :: Type -> Bool +-- Types that are allowed as a result of a 'foreign import' or of a 'foreign export' +-- Maybe we should distinguish between import and export, but +-- here we just choose the more restrictive 'incoming' predicate +-- But we allow () as well +isFFIResultTy ty = checkRepTyCon (\tc -> tc == unitTyCon || legalIncomingTyCon tc) ty + +isFFIDynArgumentTy :: Type -> Bool +-- The argument type of a foreign import dynamic must be either Addr, or +-- a newtype of Addr. +isFFIDynArgumentTy = checkRepTyCon (== addrTyCon) + +isFFIDynResultTy :: Type -> Bool +-- The result type of a foreign export dynamic must be either Addr, or +-- a newtype of Addr. +isFFIDynResultTy = checkRepTyCon (== addrTyCon) + +isFFILabelTy :: Type -> Bool +-- The type of a foreign label must be either Addr, or +-- a newtype of Addr. +isFFILabelTy = checkRepTyCon (== addrTyCon) + +checkRepTyCon :: (TyCon -> Bool) -> Type -> Bool + -- look through newtypes +checkRepTyCon check_tc ty = checkTyCon check_tc (repType ty) + +checkTyCon :: (TyCon -> Bool) -> Type -> Bool +checkTyCon check_tc ty = case splitTyConApp_maybe ty of + Just (tycon, _) -> check_tc tycon + Nothing -> False + +isTyCon :: Unique -> Type -> Bool +isTyCon uniq ty = checkTyCon (\tc -> uniq == getUnique tc) ty \end{code} -\begin{code} -stateAndArrayPrimTyCon - = pcNonRecDataTyCon stateAndArrayPrimTyConKey aRR_BASE SLIT("StateAndArray#") - alpha_beta_tyvars [stateAndArrayPrimDataCon] -stateAndArrayPrimDataCon - = pcDataCon stateAndArrayPrimDataConKey aRR_BASE SLIT("StateAndArray#") - alpha_beta_tyvars [] [mkStatePrimTy alphaTy, mkArrayPrimTy betaTy] - stateAndArrayPrimTyCon - -stateAndMutableArrayPrimTyCon - = pcNonRecDataTyCon stateAndMutableArrayPrimTyConKey aRR_BASE SLIT("StateAndMutableArray#") - alpha_beta_tyvars [stateAndMutableArrayPrimDataCon] -stateAndMutableArrayPrimDataCon - = pcDataCon stateAndMutableArrayPrimDataConKey aRR_BASE SLIT("StateAndMutableArray#") - alpha_beta_tyvars [] [mkStatePrimTy alphaTy, mkMutableArrayPrimTy alphaTy betaTy] - stateAndMutableArrayPrimTyCon - -stateAndByteArrayPrimTyCon - = pcNonRecDataTyCon stateAndByteArrayPrimTyConKey aRR_BASE SLIT("StateAndByteArray#") - alpha_tyvar [stateAndByteArrayPrimDataCon] -stateAndByteArrayPrimDataCon - = pcDataCon stateAndByteArrayPrimDataConKey aRR_BASE SLIT("StateAndByteArray#") - alpha_tyvar [] [mkStatePrimTy alphaTy, byteArrayPrimTy] - stateAndByteArrayPrimTyCon - -stateAndMutableByteArrayPrimTyCon - = pcNonRecDataTyCon stateAndMutableByteArrayPrimTyConKey aRR_BASE SLIT("StateAndMutableByteArray#") - alpha_tyvar [stateAndMutableByteArrayPrimDataCon] -stateAndMutableByteArrayPrimDataCon - = pcDataCon stateAndMutableByteArrayPrimDataConKey aRR_BASE SLIT("StateAndMutableByteArray#") - alpha_tyvar [] [mkStatePrimTy alphaTy, mkTyConApp mutableByteArrayPrimTyCon alpha_ty] - stateAndMutableByteArrayPrimTyCon - -stateAndSynchVarPrimTyCon - = pcNonRecDataTyCon stateAndSynchVarPrimTyConKey cONC_BASE SLIT("StateAndSynchVar#") - alpha_beta_tyvars [stateAndSynchVarPrimDataCon] -stateAndSynchVarPrimDataCon - = pcDataCon stateAndSynchVarPrimDataConKey cONC_BASE SLIT("StateAndSynchVar#") - alpha_beta_tyvars [] [mkStatePrimTy alphaTy, mkSynchVarPrimTy alphaTy betaTy] - stateAndSynchVarPrimTyCon -\end{code} - -The ccall-desugaring mechanism uses this function to figure out how to -rebox the result. It's really a HACK, especially the part about -how many types to drop from \tr{tys_applied}. +---------------------------------------------- +These chaps do the work; they are not exported +---------------------------------------------- \begin{code} -getStatePairingConInfo - :: Type -- primitive type - -> (Id, -- state pair constructor for prim type - Type) -- type of state pair - -getStatePairingConInfo prim_ty - = case (splitTyConApp_maybe prim_ty) of - Nothing -> panic "getStatePairingConInfo:1" - Just (prim_tycon, tys_applied) -> - let - (pair_con, pair_tycon, num_tys) = assoc "getStatePairingConInfo" tbl prim_tycon - pair_ty = mkTyConApp pair_tycon (realWorldTy : drop num_tys tys_applied) - in - (pair_con, pair_ty) - where - tbl = [ - (charPrimTyCon, (stateAndCharPrimDataCon, stateAndCharPrimTyCon, 0)), - (intPrimTyCon, (stateAndIntPrimDataCon, stateAndIntPrimTyCon, 0)), - (wordPrimTyCon, (stateAndWordPrimDataCon, stateAndWordPrimTyCon, 0)), - (addrPrimTyCon, (stateAndAddrPrimDataCon, stateAndAddrPrimTyCon, 0)), - (stablePtrPrimTyCon, (stateAndStablePtrPrimDataCon, stateAndStablePtrPrimTyCon, 0)), - (foreignObjPrimTyCon, (stateAndForeignObjPrimDataCon, stateAndForeignObjPrimTyCon, 0)), - (floatPrimTyCon, (stateAndFloatPrimDataCon, stateAndFloatPrimTyCon, 0)), - (doublePrimTyCon, (stateAndDoublePrimDataCon, stateAndDoublePrimTyCon, 0)), - (arrayPrimTyCon, (stateAndArrayPrimDataCon, stateAndArrayPrimTyCon, 0)), - (mutableArrayPrimTyCon, (stateAndMutableArrayPrimDataCon, stateAndMutableArrayPrimTyCon, 1)), - (byteArrayPrimTyCon, (stateAndByteArrayPrimDataCon, stateAndByteArrayPrimTyCon, 0)), - (mutableByteArrayPrimTyCon, (stateAndMutableByteArrayPrimDataCon, stateAndMutableByteArrayPrimTyCon, 1)), - (synchVarPrimTyCon, (stateAndSynchVarPrimDataCon, stateAndSynchVarPrimTyCon, 1)) - -- (PtrPrimTyCon, (stateAndPtrPrimDataCon, stateAndPtrPrimTyCon, 0)), - ] +legalIncomingTyCon :: 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). +legalIncomingTyCon tc + | getUnique tc `elem` [ foreignObjTyConKey, 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 + +legalOutgoingTyCon :: DynFlags -> Bool -> TyCon -> Bool +-- Checks validity of types going from Haskell -> external world +-- The boolean is true for a 'safe' call (when we don't want to +-- pass Haskell pointers to the world) +legalOutgoingTyCon dflags be_safe tc + | be_safe && getUnique tc `elem` [byteArrayTyConKey, mutableByteArrayTyConKey] + = False + | otherwise + = marshalableTyCon dflags tc + +marshalableTyCon dflags tc + = (dopt_GlasgowExts dflags && isUnLiftedTyCon tc) + || boxedMarshalableTyCon tc + +boxedMarshalableTyCon tc + = getUnique tc `elem` [ intTyConKey, int8TyConKey, int16TyConKey, int32TyConKey, int64TyConKey + , wordTyConKey, word8TyConKey, word16TyConKey, word32TyConKey, word64TyConKey + , floatTyConKey, doubleTyConKey + , addrTyConKey, charTyConKey, foreignObjTyConKey + , stablePtrTyConKey + , byteArrayTyConKey, mutableByteArrayTyConKey + , boolTyConKey + ] \end{code} -%************************************************************************ -%* * -\subsection[TysWiredIn-ST]{The basic @_ST@ state-transformer type} -%* * -%************************************************************************ - -The only reason this is wired in is because we have to represent the -type of runST. - -\begin{code} -mkStateTransformerTy s a = mkTyConApp stTyCon [s, a] - -stTyCon = pcNonRecNewTyCon stTyConKey sT_BASE SLIT("ST") alpha_beta_tyvars [stDataCon] - -stDataCon = pcDataCon stDataConKey sT_BASE SLIT("ST") - alpha_beta_tyvars [] [ty] stTyCon - where - ty = mkFunTy (mkStatePrimTy alphaTy) (mkSTretTy alphaTy betaTy) - -mkSTretTy alpha beta = mkTyConApp stRetTyCon [alpha,beta] - -stRetTyCon - = pcNonRecDataTyCon stRetTyConKey sT_BASE SLIT("STret") - alpha_beta_tyvars [stRetDataCon] -stRetDataCon - = pcDataCon stRetDataConKey sT_BASE SLIT("STret") - alpha_beta_tyvars [] [mkStatePrimTy alphaTy, betaTy] - stRetTyCon -\end{code} %************************************************************************ %* * @@ -581,10 +555,14 @@ primitive counterpart. \begin{code} boolTy = mkTyConTy boolTyCon -boolTyCon = pcNonRecDataTyCon boolTyConKey pREL_BASE SLIT("Bool") [] [falseDataCon, trueDataCon] +boolTyCon = pcTyCon EnumTyCon NonRecursive boolTyConKey + boolTyCon_RDR [] [] [falseDataCon, trueDataCon] + +falseDataCon = pcDataCon falseDataConKey false_RDR [] [] [] boolTyCon +trueDataCon = pcDataCon trueDataConKey true_RDR [] [] [] 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} %************************************************************************ @@ -603,16 +581,16 @@ data (,) a b = (,,) a b \end{verbatim} \begin{code} -mkListTy :: GenType t -> GenType t +mkListTy :: Type -> Type mkListTy ty = mkTyConApp listTyCon [ty] alphaListTy = mkSigmaTy alpha_tyvar [] (mkTyConApp listTyCon alpha_ty) -listTyCon = pcRecDataTyCon listTyConKey pREL_BASE SLIT("[]") - alpha_tyvar [nilDataCon, consDataCon] +listTyCon = pcRecDataTyCon listTyConKey listTyCon_RDR + alpha_tyvar [(True,False)] [nilDataCon, consDataCon] -nilDataCon = pcDataCon nilDataConKey pREL_BASE SLIT("[]") alpha_tyvar [] [] listTyCon -consDataCon = pcDataCon consDataConKey pREL_BASE SLIT(":") +nilDataCon = pcDataCon nilDataConKey nil_RDR alpha_tyvar [] [] listTyCon +consDataCon = pcDataCon consDataConKey cons_RDR 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 @@ -666,47 +644,48 @@ done by enumeration\srcloc{lib/prelude/InTup?.hs}. \end{itemize} \begin{code} -mkTupleTy :: Int -> [GenType t] -> GenType t - -mkTupleTy arity tys = mkTyConApp (tupleTyCon arity) tys +mkTupleTy :: Boxity -> Int -> [Type] -> Type +mkTupleTy boxity arity tys = mkTyConApp (tupleTyCon boxity arity) tys -unitTy = mkTupleTy 0 [] +unitTy = mkTupleTy Boxed 0 [] \end{code} %************************************************************************ -%* * -\subsection[TysWiredIn-_Lift]{@_Lift@ type: to support array indexing} -%* * +%* * +\subsection{Wired In Type Constructors for Representation Types} +%* * %************************************************************************ -Again, deeply turgid: \tr{data _Lift a = _Lift a}. +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} -mkLiftTy ty = mkTyConApp liftTyCon [ty] +crossTyCon :: TyCon +crossTyCon = pcNonRecDataTyCon crossTyConKey crossTyCon_RDR alpha_beta_tyvars [] [crossDataCon] -{- -mkLiftTy ty - = mkSigmaTy tvs theta (mkTyConApp liftTyCon [tau]) - where - (tvs, theta, tau) = splitSigmaTy ty +crossDataCon :: DataCon +crossDataCon = pcDataCon crossDataConKey crossDataCon_RDR alpha_beta_tyvars [] [alphaTy, betaTy] crossTyCon -isLiftTy ty - = case (splitAlgTyConApp_maybeExpandingDicts tau) of - Just (tycon, tys, _) -> tycon == liftTyCon - Nothing -> False - where - (tvs, theta, tau) = splitSigmaTy ty --} +plusTyCon :: TyCon +plusTyCon = pcNonRecDataTyCon plusTyConKey plusTyCon_RDR alpha_beta_tyvars [] [inlDataCon, inrDataCon] +inlDataCon, inrDataCon :: DataCon +inlDataCon = pcDataCon inlDataConKey inlDataCon_RDR alpha_beta_tyvars [] [alphaTy] plusTyCon +inrDataCon = pcDataCon inrDataConKey inrDataCon_RDR alpha_beta_tyvars [] [betaTy] plusTyCon -alphaLiftTy = mkSigmaTy alpha_tyvar [] (mkTyConApp liftTyCon alpha_ty) +genUnitTyCon :: TyCon -- The "1" type constructor for generics +genUnitTyCon = pcNonRecDataTyCon genUnitTyConKey genUnitTyCon_RDR [] [] [genUnitDataCon] -liftTyCon - = pcNonRecDataTyCon liftTyConKey pREL_BASE SLIT("Lift") alpha_tyvar [liftDataCon] - -liftDataCon - = pcDataCon liftDataConKey pREL_BASE SLIT("Lift") - alpha_tyvar [] alpha_ty liftTyCon - where - bottom = panic "liftDataCon:State# _RealWorld" +genUnitDataCon :: DataCon +genUnitDataCon = pcDataCon genUnitDataConKey genUnitDataCon_RDR [] [] [] genUnitTyCon \end{code} + + + + +