X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fprelude%2FTysWiredIn.lhs;h=ca4f9509a92652f1340a0f6415e85ff74cd9f371;hb=f6cd95ff9a2bddbd78682dcd9287aec7d152cc13;hp=327b209d9d881fca80d85226b41b992f6411d7d7;hpb=f9120c200bcf613b58d742802172fb4c08171f0d;p=ghc-hetmet.git diff --git a/ghc/compiler/prelude/TysWiredIn.lhs b/ghc/compiler/prelude/TysWiredIn.lhs index 327b209..ca4f950 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} @@ -10,12 +10,18 @@ This module tracks the ``state interface'' document, ``GHC prelude: types and operations.'' \begin{code} -#include "HsVersions.h" - module TysWiredIn ( + wiredInTyCons, genericTyCons, + addrDataCon, addrTy, addrTyCon, + ptrDataCon, + ptrTy, + ptrTyCon, + funPtrDataCon, + funPtrTy, + funPtrTyCon, boolTy, boolTyCon, charDataCon, @@ -25,118 +31,248 @@ module TysWiredIn ( doubleDataCon, doubleTy, doubleTyCon, - eqDataCon, - falseDataCon, + falseDataCon, falseDataConId, floatDataCon, floatTy, floatTyCon, - getStatePairingConInfo, - gtDataCon, + intDataCon, intTy, intTyCon, + integerTy, integerTyCon, - integerDataCon, - liftDataCon, - liftTyCon, + smallIntegerDataCon, + largeIntegerDataCon, + listTyCon, - ltDataCon, - mallocPtrTyCon, - mkLiftTy, + mkListTy, - mkPrimIoTy, - mkStateTransformerTy, - mkTupleTy, nilDataCon, - orderingTy, - orderingTyCon, - primIoTyCon, - ratioDataCon, - ratioTyCon, - rationalTy, - rationalTyCon, - realWorldStateTy, - return2GMPsTyCon, - returnIntAndGMPTyCon, - stTyCon, + + -- tuples + mkTupleTy, + tupleTyCon, tupleCon, + unitTyCon, unitDataConId, pairTyCon, + unboxedSingletonTyCon, unboxedSingletonDataCon, + unboxedPairTyCon, unboxedPairDataCon, + + -- Generics + genUnitTyCon, genUnitDataCon, + plusTyCon, inrDataCon, inlDataCon, + crossTyCon, crossDataCon, + stablePtrTyCon, - stateAndAddrPrimTyCon, - stateAndArrayPrimTyCon, - stateAndByteArrayPrimTyCon, - stateAndCharPrimTyCon, - stateAndDoublePrimTyCon, - stateAndFloatPrimTyCon, - stateAndIntPrimTyCon, - stateAndMallocPtrPrimTyCon, - stateAndMutableArrayPrimTyCon, - stateAndMutableByteArrayPrimTyCon, - stateAndPtrPrimTyCon, - stateAndStablePtrPrimTyCon, - stateAndSynchVarPrimTyCon, - stateAndWordPrimTyCon, - stateDataCon, - stateTyCon, stringTy, - stringTyCon, - trueDataCon, + trueDataCon, trueDataConId, unitTy, + voidTy, wordDataCon, wordTy, - wordTyCon - + wordTyCon, + + 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 -import Ubiq -import TyLoop ( mkDataCon, StrictnessMark(..) ) +#include "HsVersions.h" + +import {-# SOURCE #-} MkId( mkDataConId, mkDataConWrapId ) +import {-# SOURCE #-} Generics( mkTyConGenInfo ) -- friends: -import PrelMods +import PrelNames import TysPrim -- others: -import SpecEnv ( SpecEnv(..) ) -import Kind ( mkBoxedTypeKind, mkArrowKind ) -import Name ( mkBuiltinName ) -import SrcLoc ( mkBuiltinSrcLoc ) -import TyCon ( mkDataTyCon, mkTupleTyCon, mkSynTyCon, - NewOrData(..), TyCon +import ForeignCall ( Safety, playSafe ) +import Constants ( mAX_TUPLE_SIZE ) +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, AlgTyConFlavour(..), tyConDataCons, + mkTupleTyCon, isUnLiftedTyCon, mkAlgTyCon ) -import Type ( mkTyConTy, applyTyCon, mkSynTy, mkSigmaTy, - mkFunTys, maybeAppDataTyCon, - GenType(..), ThetaType(..), TauType(..) ) -import TyVar ( getTyVarKind, alphaTyVar, betaTyVar ) -import Unique -import Util ( assoc, panic ) - -nullSpecEnv = error "TysWiredIn:nullSpecEnv = " -addOneToSpecEnv = error "TysWiredIn:addOneToSpecEnv = " -pc_gen_specs = error "TysWiredIn:pc_gen_specs " -mkSpecInfo = error "TysWiredIn:SpecInfo" - -pcDataTyCon :: Unique{-TyConKey-} -> Module -> FAST_STRING - -> [TyVar] -> [Id] -> TyCon -pcDataTyCon key mod str tyvars cons - = mkDataTyCon (mkBuiltinName key mod str) tycon_kind - tyvars [{-no context-}] cons [{-no derivings-}] - DataType + +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] +\end{code} + + +%************************************************************************ +%* * +\subsection{Wired in type constructors} +%* * +%************************************************************************ + +\begin{code} +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} + + +%************************************************************************ +%* * +\subsection{mkWiredInTyCon} +%* * +%************************************************************************ + +\begin{code} +pcNonRecDataTyCon = pcTyCon DataTyCon NonRecursive +pcRecDataTyCon = pcTyCon DataTyCon Recursive + +pcTyCon new_or_data is_rec name tyvars argvrcs cons + = tycon + where + 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 - tycon_kind = foldr (mkArrowKind . getTyVarKind) mkBoxedTypeKind tyvars - -pcDataCon :: Unique{-DataConKey-} -> Module -> FAST_STRING - -> [TyVar] -> ThetaType -> [TauType] -> TyCon -> SpecEnv -> Id -pcDataCon key mod str tyvars context arg_tys tycon specenv - = mkDataCon (mkBuiltinName key mod str) - [ NotMarkedStrict | a <- arg_tys ] - [ {- no labelled fields -} ] - tyvars context arg_tys tycon - -- specenv - -pcGenerateDataSpecs :: Type -> SpecEnv -pcGenerateDataSpecs ty - = pc_gen_specs False err err err ty + 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 - err = panic "PrelUtils:GenerateDataSpecs" + data_con = mkDataCon name + [ NotMarkedStrict | a <- arg_tys ] + [ {- no labelled fields -} ] + tyvars context [] [] arg_tys tycon work_id wrap_id + + wrap_rdr = nameRdrName name + wrap_occ = rdrNameOcc wrap_rdr + + mod = nameModule name + wrap_id = mkDataConWrapId data_con + + 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-tuples]{The tuple types} +%* * +%************************************************************************ + +\begin{code} +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 + + tyvars | isBoxed boxity = take arity alphaTyVars + | otherwise = take arity openAlphaTyVars + + 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 + +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} %************************************************************************ @@ -146,75 +282,107 @@ pcGenerateDataSpecs ty %************************************************************************ \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 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' +-- voidTy using (). +voidTy = unitTy +\end{code} + + +\begin{code} charTy = mkTyConTy charTyCon -charTyCon = pcDataTyCon charTyConKey pRELUDE_BUILTIN SLIT("Char") [] [charDataCon] -charDataCon = pcDataCon charDataConKey pRELUDE_BUILTIN SLIT("C#") [] [] [charPrimTy] charTyCon nullSpecEnv +charTyCon = pcNonRecDataTyCon charTyConName [] [] [charDataCon] +charDataCon = pcDataCon charDataConName [] [] [charPrimTy] charTyCon + +stringTy = mkListTy charTy -- convenience only \end{code} \begin{code} intTy = mkTyConTy intTyCon -intTyCon = pcDataTyCon intTyConKey pRELUDE_BUILTIN SLIT("Int") [] [intDataCon] -intDataCon = pcDataCon intDataConKey pRELUDE_BUILTIN SLIT("I#") [] [] [intPrimTy] intTyCon nullSpecEnv +intTyCon = pcNonRecDataTyCon intTyConName [] [] [intDataCon] +intDataCon = pcDataCon intDataConName [] [] [intPrimTy] intTyCon \end{code} \begin{code} wordTy = mkTyConTy wordTyCon -wordTyCon = pcDataTyCon wordTyConKey pRELUDE_BUILTIN SLIT("_Word") [] [wordDataCon] -wordDataCon = pcDataCon wordDataConKey pRELUDE_BUILTIN SLIT("W#") [] [] [wordPrimTy] wordTyCon nullSpecEnv +wordTyCon = pcNonRecDataTyCon wordTyConName [] [] [wordDataCon] +wordDataCon = pcDataCon wordDataConName [] [] [wordPrimTy] wordTyCon \end{code} \begin{code} addrTy = mkTyConTy addrTyCon -addrTyCon = pcDataTyCon addrTyConKey pRELUDE_BUILTIN SLIT("_Addr") [] [addrDataCon] -addrDataCon = pcDataCon addrDataConKey pRELUDE_BUILTIN SLIT("A#") [] [] [addrPrimTy] addrTyCon nullSpecEnv +addrTyCon = pcNonRecDataTyCon addrTyConName [] [] [addrDataCon] +addrDataCon = pcDataCon addrDataConName [] [] [addrPrimTy] addrTyCon \end{code} \begin{code} -floatTy = mkTyConTy floatTyCon +ptrTy = mkTyConTy ptrTyCon -floatTyCon = pcDataTyCon floatTyConKey pRELUDE_BUILTIN SLIT("Float") [] [floatDataCon] -floatDataCon = pcDataCon floatDataConKey pRELUDE_BUILTIN SLIT("F#") [] [] [floatPrimTy] floatTyCon nullSpecEnv +ptrTyCon = pcNonRecDataTyCon ptrTyConName alpha_tyvar [(True,False)] [ptrDataCon] +ptrDataCon = pcDataCon ptrDataConName alpha_tyvar [] [addrPrimTy] ptrTyCon \end{code} \begin{code} -doubleTy = mkTyConTy doubleTyCon +funPtrTy = mkTyConTy funPtrTyCon -doubleTyCon = pcDataTyCon doubleTyConKey pRELUDE_BUILTIN SLIT("Double") [] [doubleDataCon] -doubleDataCon = pcDataCon doubleDataConKey pRELUDE_BUILTIN SLIT("D#") [] [] [doublePrimTy] doubleTyCon nullSpecEnv +funPtrTyCon = pcNonRecDataTyCon funPtrTyConName alpha_tyvar [(True,False)] [funPtrDataCon] +funPtrDataCon = pcDataCon funPtrDataConName alpha_tyvar [] [addrPrimTy] funPtrTyCon \end{code} \begin{code} -mkStateTy ty = applyTyCon stateTyCon [ty] -realWorldStateTy = mkStateTy realWorldTy -- a common use +floatTy = mkTyConTy floatTyCon -stateTyCon = pcDataTyCon stateTyConKey pRELUDE_BUILTIN SLIT("_State") [alphaTyVar] [stateDataCon] -stateDataCon - = pcDataCon stateDataConKey pRELUDE_BUILTIN SLIT("S#") - [alphaTyVar] [] [mkStatePrimTy alphaTy] stateTyCon nullSpecEnv +floatTyCon = pcNonRecDataTyCon floatTyConName [] [] [floatDataCon] +floatDataCon = pcDataCon floatDataConName [] [] [floatPrimTy] floatTyCon +\end{code} + +\begin{code} +doubleTy = mkTyConTy doubleTyCon + +doubleTyCon = pcNonRecDataTyCon doubleTyConName [] [] [doubleDataCon] +doubleDataCon = pcDataCon doubleDataConName [] [] [doublePrimTy] doubleTyCon \end{code} \begin{code} stablePtrTyCon - = pcDataTyCon stablePtrTyConKey gLASGOW_MISC SLIT("_StablePtr") - [alphaTyVar] [stablePtrDataCon] + = pcNonRecDataTyCon stablePtrTyConName + alpha_tyvar [(True,False)] [stablePtrDataCon] where stablePtrDataCon - = pcDataCon stablePtrDataConKey gLASGOW_MISC SLIT("_StablePtr") - [alphaTyVar] [] [applyTyCon stablePtrPrimTyCon [alphaTy]] stablePtrTyCon nullSpecEnv + = pcDataCon stablePtrDataConName + alpha_tyvar [] [mkStablePtrPrimTy alphaTy] stablePtrTyCon +\end{code} + +\begin{code} +foreignObjTyCon + = pcNonRecDataTyCon foreignObjTyConName + [] [] [foreignObjDataCon] + where + foreignObjDataCon + = pcDataCon foreignObjDataConName + [] [] [foreignObjPrimTy] foreignObjTyCon \end{code} \begin{code} -mallocPtrTyCon - = pcDataTyCon mallocPtrTyConKey gLASGOW_MISC SLIT("_MallocPtr") - [] [mallocPtrDataCon] +foreignPtrTyCon + = pcNonRecDataTyCon foreignPtrTyConName + alpha_tyvar [(True,False)] [foreignPtrDataCon] where - mallocPtrDataCon - = pcDataCon mallocPtrDataConKey gLASGOW_MISC SLIT("_MallocPtr") - [] [] [applyTyCon mallocPtrPrimTyCon []] mallocPtrTyCon nullSpecEnv + foreignPtrDataCon + = pcDataCon foreignPtrDataConName + alpha_tyvar [] [foreignObjPrimTy] foreignPtrTyCon \end{code} %************************************************************************ @@ -225,238 +393,129 @@ mallocPtrTyCon @Integer@ and its pals are not really primitive. @Integer@ itself, first: \begin{code} -integerTy :: GenType t u -integerTy = mkTyConTy integerTyCon +integerTy :: Type +integerTy = mkTyConTy integerTyCon -integerTyCon = pcDataTyCon integerTyConKey pRELUDE_BUILTIN SLIT("Integer") [] [integerDataCon] +integerTyCon = pcNonRecDataTyCon integerTyConName + [] [] [smallIntegerDataCon, largeIntegerDataCon] -integerDataCon = pcDataCon integerDataConKey pRELUDE_BUILTIN SLIT("J#") - [] [] [intPrimTy, intPrimTy, byteArrayPrimTy] integerTyCon nullSpecEnv +smallIntegerDataCon = pcDataCon smallIntegerDataConName + [] [] [intPrimTy] integerTyCon +largeIntegerDataCon = pcDataCon largeIntegerDataConName + [] [] [intPrimTy, byteArrayPrimTy] integerTyCon \end{code} -And the other pairing types: -\begin{code} -return2GMPsTyCon = pcDataTyCon return2GMPsTyConKey - pRELUDE_BUILTIN SLIT("_Return2GMPs") [] [return2GMPsDataCon] - -return2GMPsDataCon - = pcDataCon return2GMPsDataConKey pRELUDE_BUILTIN SLIT("_Return2GMPs") [] [] - [intPrimTy, intPrimTy, byteArrayPrimTy, - intPrimTy, intPrimTy, byteArrayPrimTy] return2GMPsTyCon nullSpecEnv - -returnIntAndGMPTyCon = pcDataTyCon returnIntAndGMPTyConKey - pRELUDE_BUILTIN SLIT("_ReturnIntAndGMP") [] [returnIntAndGMPDataCon] - -returnIntAndGMPDataCon - = pcDataCon returnIntAndGMPDataConKey pRELUDE_BUILTIN SLIT("_ReturnIntAndGMP") [] [] - [intPrimTy, intPrimTy, intPrimTy, byteArrayPrimTy] returnIntAndGMPTyCon nullSpecEnv -\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 - = pcDataTyCon stateAndPtrPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndPtr#") - [alphaTyVar, betaTyVar] [stateAndPtrPrimDataCon] -stateAndPtrPrimDataCon - = pcDataCon stateAndPtrPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndPtr#") - [alphaTyVar, betaTyVar] [] [mkStatePrimTy alphaTy, betaTy] - stateAndPtrPrimTyCon nullSpecEnv - -stateAndCharPrimTyCon - = pcDataTyCon stateAndCharPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndChar#") - [alphaTyVar] [stateAndCharPrimDataCon] -stateAndCharPrimDataCon - = pcDataCon stateAndCharPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndChar#") - [alphaTyVar] [] [mkStatePrimTy alphaTy, charPrimTy] - stateAndCharPrimTyCon nullSpecEnv - -stateAndIntPrimTyCon - = pcDataTyCon stateAndIntPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndInt#") - [alphaTyVar] [stateAndIntPrimDataCon] -stateAndIntPrimDataCon - = pcDataCon stateAndIntPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndInt#") - [alphaTyVar] [] [mkStatePrimTy alphaTy, intPrimTy] - stateAndIntPrimTyCon nullSpecEnv - -stateAndWordPrimTyCon - = pcDataTyCon stateAndWordPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndWord#") - [alphaTyVar] [stateAndWordPrimDataCon] -stateAndWordPrimDataCon - = pcDataCon stateAndWordPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndWord#") - [alphaTyVar] [] [mkStatePrimTy alphaTy, wordPrimTy] - stateAndWordPrimTyCon nullSpecEnv - -stateAndAddrPrimTyCon - = pcDataTyCon stateAndAddrPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndAddr#") - [alphaTyVar] [stateAndAddrPrimDataCon] -stateAndAddrPrimDataCon - = pcDataCon stateAndAddrPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndAddr#") - [alphaTyVar] [] [mkStatePrimTy alphaTy, addrPrimTy] - stateAndAddrPrimTyCon nullSpecEnv - -stateAndStablePtrPrimTyCon - = pcDataTyCon stateAndStablePtrPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndStablePtr#") - [alphaTyVar, betaTyVar] [stateAndStablePtrPrimDataCon] -stateAndStablePtrPrimDataCon - = pcDataCon stateAndStablePtrPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndStablePtr#") - [alphaTyVar, betaTyVar] [] - [mkStatePrimTy alphaTy, applyTyCon stablePtrPrimTyCon [betaTy]] - stateAndStablePtrPrimTyCon nullSpecEnv - -stateAndMallocPtrPrimTyCon - = pcDataTyCon stateAndMallocPtrPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndMallocPtr#") - [alphaTyVar] [stateAndMallocPtrPrimDataCon] -stateAndMallocPtrPrimDataCon - = pcDataCon stateAndMallocPtrPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndMallocPtr#") - [alphaTyVar] [] - [mkStatePrimTy alphaTy, applyTyCon mallocPtrPrimTyCon []] - stateAndMallocPtrPrimTyCon nullSpecEnv - -stateAndFloatPrimTyCon - = pcDataTyCon stateAndFloatPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndFloat#") - [alphaTyVar] [stateAndFloatPrimDataCon] -stateAndFloatPrimDataCon - = pcDataCon stateAndFloatPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndFloat#") - [alphaTyVar] [] [mkStatePrimTy alphaTy, floatPrimTy] - stateAndFloatPrimTyCon nullSpecEnv - -stateAndDoublePrimTyCon - = pcDataTyCon stateAndDoublePrimTyConKey pRELUDE_BUILTIN SLIT("StateAndDouble#") - [alphaTyVar] [stateAndDoublePrimDataCon] -stateAndDoublePrimDataCon - = pcDataCon stateAndDoublePrimDataConKey pRELUDE_BUILTIN SLIT("StateAndDouble#") - [alphaTyVar] [] [mkStatePrimTy alphaTy, doublePrimTy] - stateAndDoublePrimTyCon nullSpecEnv +isFFIArgumentTy :: DynFlags -> Safety -> Type -> Bool +-- Checks for valid argument type for a 'foreign import' +isFFIArgumentTy dflags safety ty + = checkRepTyCon (legalOutgoingTyCon dflags safety) ty + +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} -\begin{code} -stateAndArrayPrimTyCon - = pcDataTyCon stateAndArrayPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndArray#") - [alphaTyVar, betaTyVar] [stateAndArrayPrimDataCon] -stateAndArrayPrimDataCon - = pcDataCon stateAndArrayPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndArray#") - [alphaTyVar, betaTyVar] [] [mkStatePrimTy alphaTy, mkArrayPrimTy betaTy] - stateAndArrayPrimTyCon nullSpecEnv - -stateAndMutableArrayPrimTyCon - = pcDataTyCon stateAndMutableArrayPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndMutableArray#") - [alphaTyVar, betaTyVar] [stateAndMutableArrayPrimDataCon] -stateAndMutableArrayPrimDataCon - = pcDataCon stateAndMutableArrayPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndMutableArray#") - [alphaTyVar, betaTyVar] [] [mkStatePrimTy alphaTy, mkMutableArrayPrimTy alphaTy betaTy] - stateAndMutableArrayPrimTyCon nullSpecEnv - -stateAndByteArrayPrimTyCon - = pcDataTyCon stateAndByteArrayPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndByteArray#") - [alphaTyVar] [stateAndByteArrayPrimDataCon] -stateAndByteArrayPrimDataCon - = pcDataCon stateAndByteArrayPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndByteArray#") - [alphaTyVar] [] [mkStatePrimTy alphaTy, byteArrayPrimTy] - stateAndByteArrayPrimTyCon nullSpecEnv - -stateAndMutableByteArrayPrimTyCon - = pcDataTyCon stateAndMutableByteArrayPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndMutableByteArray#") - [alphaTyVar] [stateAndMutableByteArrayPrimDataCon] -stateAndMutableByteArrayPrimDataCon - = pcDataCon stateAndMutableByteArrayPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndMutableByteArray#") - [alphaTyVar] [] [mkStatePrimTy alphaTy, applyTyCon mutableByteArrayPrimTyCon [alphaTy]] - stateAndMutableByteArrayPrimTyCon nullSpecEnv - -stateAndSynchVarPrimTyCon - = pcDataTyCon stateAndSynchVarPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndSynchVar#") - [alphaTyVar, betaTyVar] [stateAndSynchVarPrimDataCon] -stateAndSynchVarPrimDataCon - = pcDataCon stateAndSynchVarPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndSynchVar#") - [alphaTyVar, betaTyVar] [] [mkStatePrimTy alphaTy, mkSynchVarPrimTy alphaTy betaTy] - stateAndSynchVarPrimTyCon nullSpecEnv -\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}. - -\begin{code} -getStatePairingConInfo - :: Type -- primitive type - -> (Id, -- state pair constructor for prim type - Type) -- type of state pair - -getStatePairingConInfo prim_ty - = case (maybeAppDataTyCon 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 = applyTyCon 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)), - (mallocPtrPrimTyCon, (stateAndMallocPtrPrimDataCon, stateAndMallocPtrPrimTyCon, 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)), - ] -\end{code} - -%************************************************************************ -%* * -\subsection[TysWiredIn-ST]{The basic @_ST@ state-transformer type} -%* * -%************************************************************************ - -This is really just an ordinary synonym, except it is ABSTRACT. +---------------------------------------------- +These chaps do the work; they are not exported +---------------------------------------------- \begin{code} -mkStateTransformerTy s a = mkSynTy stTyCon [s, a] - -stTyCon - = mkSynTyCon - (mkBuiltinName stTyConKey gLASGOW_ST SLIT("_ST")) - (panic "TysWiredIn.stTyCon:Kind") - 2 [alphaTyVar, betaTyVar] - (mkFunTys [mkStateTy alphaTy] (mkTupleTy 2 [betaTy, mkStateTy alphaTy])) +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-IO]{The @PrimIO@ and @IO@ monadic-I/O types} -%* * -%************************************************************************ - -@PrimIO@ and @IO@ really are just plain synonyms. - -\begin{code} -mkPrimIoTy a = mkSynTy primIoTyCon [a] - -primIoTyCon - = mkSynTyCon - (mkBuiltinName primIoTyConKey pRELUDE_PRIMIO SLIT("PrimIO")) - (panic "TysWiredIn.primIoTyCon:Kind") - 1 [alphaTyVar] (mkStateTransformerTy realWorldTy alphaTy) -\end{code} %************************************************************************ %* * @@ -509,31 +568,14 @@ primitive counterpart. \begin{code} boolTy = mkTyConTy boolTyCon -boolTyCon = pcDataTyCon boolTyConKey pRELUDE_CORE SLIT("Bool") [] [falseDataCon, trueDataCon] +boolTyCon = pcTyCon EnumTyCon NonRecursive boolTyConName + [] [] [falseDataCon, trueDataCon] -falseDataCon = pcDataCon falseDataConKey pRELUDE_CORE SLIT("False") [] [] [] boolTyCon nullSpecEnv -trueDataCon = pcDataCon trueDataConKey pRELUDE_CORE SLIT("True") [] [] [] boolTyCon nullSpecEnv -\end{code} - -%************************************************************************ -%* * -\subsection[TysWiredIn-Ordering]{The @Ordering@ type} -%* * -%************************************************************************ - -\begin{code} ---------------------------------------------- --- data Ordering = LT | EQ | GT deriving () ---------------------------------------------- +falseDataCon = pcDataCon falseDataConName [] [] [] boolTyCon +trueDataCon = pcDataCon trueDataConName [] [] [] boolTyCon -orderingTy = mkTyConTy orderingTyCon - -orderingTyCon = pcDataTyCon orderingTyConKey pRELUDE_BUILTIN SLIT("Ordering") [] - [ltDataCon, eqDataCon, gtDataCon] - -ltDataCon = pcDataCon ltDataConKey pRELUDE_BUILTIN SLIT("LT") [] [] [] orderingTyCon nullSpecEnv -eqDataCon = pcDataCon eqDataConKey pRELUDE_BUILTIN SLIT("EQ") [] [] [] orderingTyCon nullSpecEnv -gtDataCon = pcDataCon gtDataConKey pRELUDE_BUILTIN SLIT("GT") [] [] [] orderingTyCon nullSpecEnv +falseDataConId = dataConId falseDataCon +trueDataConId = dataConId trueDataCon \end{code} %************************************************************************ @@ -543,28 +585,24 @@ gtDataCon = pcDataCon gtDataConKey pRELUDE_BUILTIN SLIT("GT") [] [] [] ordering %************************************************************************ Special syntax, deeply wired in, but otherwise an ordinary algebraic -data type: +data types: \begin{verbatim} -data List a = Nil | a : (List a) -ToDo: data [] a = [] | a : (List a) -ToDo: data () = () - data (,,) a b c = (,,) a b c +data [] a = [] | a : (List a) +data () = () +data (,) a b = (,,) a b +... \end{verbatim} \begin{code} -mkListTy :: GenType t u -> GenType t u -mkListTy ty = applyTyCon listTyCon [ty] +mkListTy :: Type -> Type +mkListTy ty = mkTyConApp listTyCon [ty] -alphaListTy = mkSigmaTy [alphaTyVar] [] (applyTyCon listTyCon [alphaTy]) +listTyCon = pcRecDataTyCon listTyConName + alpha_tyvar [(True,False)] [nilDataCon, consDataCon] -listTyCon = pcDataTyCon listTyConKey pRELUDE_BUILTIN SLIT("[]") - [alphaTyVar] [nilDataCon, consDataCon] - -nilDataCon = pcDataCon nilDataConKey pRELUDE_BUILTIN SLIT("[]") [alphaTyVar] [] [] listTyCon - (pcGenerateDataSpecs alphaListTy) -consDataCon = pcDataCon consDataConKey pRELUDE_BUILTIN SLIT(":") - [alphaTyVar] [] [alphaTy, applyTyCon listTyCon [alphaTy]] listTyCon - (pcGenerateDataSpecs alphaListTy) +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) @@ -617,93 +655,43 @@ done by enumeration\srcloc{lib/prelude/InTup?.hs}. \end{itemize} \begin{code} -mkTupleTy :: Int -> [GenType t u] -> GenType t u - -mkTupleTy arity tys = applyTyCon (mkTupleTyCon 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-Ratios]{@Ratio@ and @Rational@} -%* * +%* * +\subsection{Wired In Type Constructors for Representation Types} +%* * %************************************************************************ -ToDo: make this (mostly) go away. - -\begin{code} -rationalTy :: GenType t u +The following code defines the wired in datatypes cross, plus, unit +and c_of needed for the generic methods. -mkRatioTy ty = applyTyCon ratioTyCon [ty] -rationalTy = mkRatioTy integerTy - -ratioTyCon = pcDataTyCon ratioTyConKey pRELUDE_RATIO SLIT("Ratio") [alphaTyVar] [ratioDataCon] - -ratioDataCon = pcDataCon ratioDataConKey pRELUDE_RATIO SLIT(":%") - [alphaTyVar] [{-(integralClass,alphaTy)-}] [alphaTy, alphaTy] ratioTyCon nullSpecEnv - -- context omitted to match lib/prelude/ defn of "data Ratio ..." - -rationalTyCon - = mkSynTyCon - (mkBuiltinName rationalTyConKey pRELUDE_RATIO SLIT("Rational")) - mkBoxedTypeKind - 0 [] rationalTy -- == mkRatioTy integerTy -\end{code} - -%************************************************************************ -%* * -\subsection[TysWiredIn-_Lift]{@_Lift@ type: to support array indexing} -%* * -%************************************************************************ - -Again, deeply turgid: \tr{data _Lift a = _Lift a}. +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 = applyTyCon liftTyCon [ty] - -{- -mkLiftTy ty - = mkSigmaTy tvs theta (applyTyCon liftTyCon [tau]) - where - (tvs, theta, tau) = splitSigmaTy ty - -isLiftTy ty - = case maybeAppDataTyCon tau of - Just (tycon, tys, _) -> tycon == liftTyCon - Nothing -> False - where - (tvs, theta, tau) = splitSigmaTy ty --} - - -alphaLiftTy = mkSigmaTy [alphaTyVar] [] (applyTyCon liftTyCon [alphaTy]) +crossTyCon :: TyCon +crossTyCon = pcNonRecDataTyCon crossTyConName alpha_beta_tyvars [] [crossDataCon] -liftTyCon - = pcDataTyCon liftTyConKey pRELUDE_BUILTIN SLIT("_Lift") [alphaTyVar] [liftDataCon] +crossDataCon :: DataCon +crossDataCon = pcDataCon crossDataConName alpha_beta_tyvars [] [alphaTy, betaTy] crossTyCon -liftDataCon - = pcDataCon liftDataConKey pRELUDE_BUILTIN SLIT("_Lift") - [alphaTyVar] [] [alphaTy] liftTyCon - ((pcGenerateDataSpecs alphaLiftTy) `addOneToSpecEnv` - (mkSpecInfo [Just realWorldStatePrimTy] 0 bottom)) - where - bottom = panic "liftDataCon:State# _RealWorld" -\end{code} +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 -%************************************************************************ -%* * -\subsection[TysWiredIn-for-convenience]{Types wired in for convenience (e.g., @String@)} -%* * -%************************************************************************ - -\begin{code} -stringTy = mkListTy charTy +genUnitTyCon :: TyCon -- The "1" type constructor for generics +genUnitTyCon = pcNonRecDataTyCon genUnitTyConName [] [] [genUnitDataCon] -stringTyCon - = mkSynTyCon - (mkBuiltinName stringTyConKey pRELUDE_CORE SLIT("String")) - mkBoxedTypeKind - 0 [] stringTy +genUnitDataCon :: DataCon +genUnitDataCon = pcDataCon genUnitDataConName [] [] [] genUnitTyCon \end{code}