X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fprelude%2FTysWiredIn.lhs;h=63dd5243d3d5ffd395bb3eec412b1f17622d4e39;hb=438596897ebbe25a07e1c82085cfbc5bdb00f09e;hp=ce285871099336030984ecd7f4dcaf5bc1fc130d;hpb=e7d21ee4f8ac907665a7e170c71d59e13a01da09;p=ghc-hetmet.git diff --git a/ghc/compiler/prelude/TysWiredIn.lhs b/ghc/compiler/prelude/TysWiredIn.lhs index ce28587..63dd524 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} @@ -10,8 +10,6 @@ This module tracks the ``state interface'' document, ``GHC prelude: types and operations.'' \begin{code} -#include "HsVersions.h" - module TysWiredIn ( addrDataCon, addrTy, @@ -21,456 +19,489 @@ module TysWiredIn ( charDataCon, charTy, charTyCon, - cmpTagTy, - cmpTagTyCon, consDataCon, doubleDataCon, doubleTy, + isDoubleTy, doubleTyCon, - eqPrimDataCon, falseDataCon, floatDataCon, floatTy, + isFloatTy, floatTyCon, - getStatePairingConInfo, - gtPrimDataCon, + + voidTyCon, voidTy, + intDataCon, intTy, intTyCon, + isIntTy, + inIntRange, + + int8TyCon, + int16TyCon, + int32TyCon, + + int64TyCon, + int64DataCon, +-- int64Ty, + integerTy, integerTyCon, - liftDataCon, - liftTyCon, + integerDataCon, + isIntegerTy, + listTyCon, - ltPrimDataCon, - mallocPtrTyCon, - mkLiftTy, + mkListTy, - mkPrimIoTy, - mkStateTransformerTy, - mkTupleTy, nilDataCon, - primIoTyCon, - ratioDataCon, - ratioTyCon, - rationalTy, - rationalTyCon, - realWorldStateTy, - return2GMPsTyCon, - returnIntAndGMPTyCon, - stTyCon, - stablePtrTyCon, - stateAndAddrPrimTyCon, - stateAndArrayPrimTyCon, - stateAndByteArrayPrimTyCon, - stateAndCharPrimTyCon, - stateAndDoublePrimTyCon, - stateAndFloatPrimTyCon, - stateAndIntPrimTyCon, - stateAndMallocPtrPrimTyCon, - stateAndMutableArrayPrimTyCon, - stateAndMutableByteArrayPrimTyCon, - stateAndPtrPrimTyCon, - stateAndStablePtrPrimTyCon, - stateAndSynchVarPrimTyCon, - stateAndWordPrimTyCon, + + -- tuples + mkTupleTy, + tupleTyCon, tupleCon, unitTyCon, unitDataCon, pairTyCon, pairDataCon, + + -- unboxed tuples + mkUnboxedTupleTy, + unboxedTupleTyCon, unboxedTupleCon, + unboxedPairTyCon, unboxedPairDataCon, + stateDataCon, stateTyCon, + realWorldStateTy, + + stablePtrTyCon, stringTy, - stringTyCon, trueDataCon, unitTy, wordDataCon, wordTy, - wordTyCon + wordTyCon, + + word8TyCon, + word16TyCon, + word32TyCon, + + word64DataCon, +-- word64Ty, + word64TyCon, + + isFFIArgumentTy, -- :: Type -> Bool + isFFIResultTy, -- :: Type -> Bool + isFFIExternalTy, -- :: Type -> Bool + isAddrTy, -- :: Type -> Bool + ) where -import Pretty --ToDo:rm debugging only +#include "HsVersions.h" -import PrelFuns -- help functions, types and things +import {-# SOURCE #-} MkId( mkDataConId ) + +-- friends: +import PrelMods import TysPrim -import AbsUniType ( applyTyCon, mkTupleTyCon, mkSynonymTyCon, - getUniDataTyCon_maybe, mkSigmaTy, TyCon - , pprUniType --ToDo: rm debugging only - IF_ATTACK_PRAGMAS(COMMA cmpTyCon) - ) -import IdInfo -import Maybes ( Maybe(..) ) +-- others: +import Constants ( mAX_TUPLE_SIZE ) +import Name ( mkWiredInTyConName, mkWiredInIdName, mkTupNameStr, + mkUbxTupNameStr ) +import DataCon ( DataCon, mkDataCon ) +import Var ( TyVar, tyVarKind ) +import TyCon ( TyCon, mkAlgTyCon, mkSynTyCon, mkTupleTyCon ) +import BasicTypes ( Module, Arity, NewOrData(..), + RecFlag(..), StrictnessMark(..) ) +import Type ( Type, mkTyConTy, mkTyConApp, mkSigmaTy, mkTyVarTys, + mkArrowKinds, boxedTypeKind, unboxedTypeKind, + mkFunTy, mkFunTys, isUnLiftedType, + splitTyConApp_maybe, splitAlgTyConApp_maybe, + GenType(..), ThetaType, TauType ) +import PrimRep ( PrimRep(..) ) import Unique -import Util +import CmdLineOpts ( opt_GlasgowExts ) +import Util ( assoc, panic ) +import Array + +alpha_tyvar = [alphaTyVar] +alpha_ty = [alphaTy] +alpha_beta_tyvars = [alphaTyVar, betaTyVar] + +pcRecDataTyCon, pcNonRecDataTyCon, pcNonRecNewTyCon + :: Unique{-TyConKey-} -> Module -> FAST_STRING + -> [TyVar] -> [DataCon] -> TyCon + +pcRecDataTyCon = pcTyCon DataType Recursive +pcNonRecDataTyCon = pcTyCon DataType NonRecursive +pcNonRecNewTyCon = pcTyCon NewType NonRecursive + +pcTyCon new_or_data is_rec key mod str tyvars cons + = tycon + where + tycon = mkAlgTyCon name kind + tyvars + [] -- No context + 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 + = 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 -> 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 str id + id = mkDataConId data_con \end{code} %************************************************************************ %* * -\subsection[TysWiredIn-boxed-prim]{The ``boxed primitive'' types (@Char@, @Int@, etc)} +\subsection[TysWiredIn-tuples]{The tuple types} %* * %************************************************************************ \begin{code} -charTy = UniData charTyCon [] +tupleTyCon :: Arity -> TyCon +tupleTyCon i | i > mAX_TUPLE_SIZE = fst (mk_tuple i) -- Build one specially + | otherwise = tupleTyConArr!i -charTyCon = pcDataTyCon charTyConKey pRELUDE_BUILTIN SLIT("Char") [] [charDataCon] -charDataCon = pcDataCon charDataConKey pRELUDE_BUILTIN SLIT("C#") [] [] [charPrimTy] charTyCon nullSpecEnv -\end{code} +tupleCon :: Arity -> DataCon +tupleCon i | i > mAX_TUPLE_SIZE = snd (mk_tuple i) -- Build one specially + | otherwise = tupleConArr!i -\begin{code} -intTy = UniData intTyCon [] +tupleTyCons :: [TyCon] +tupleTyCons = elems tupleTyConArr -intTyCon = pcDataTyCon intTyConKey pRELUDE_BUILTIN SLIT("Int") [] [intDataCon] -intDataCon = pcDataCon intDataConKey pRELUDE_BUILTIN SLIT("I#") [] [] [intPrimTy] intTyCon nullSpecEnv -\end{code} +tupleTyConArr :: Array Int TyCon +tupleTyConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map fst tuples) -\begin{code} -wordTy = UniData wordTyCon [] +tupleConArr :: Array Int DataCon +tupleConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map snd tuples) -wordTyCon = pcDataTyCon wordTyConKey pRELUDE_BUILTIN SLIT("_Word") [] [wordDataCon] -wordDataCon = pcDataCon wordDataConKey pRELUDE_BUILTIN SLIT("W#") [] [] [wordPrimTy] wordTyCon nullSpecEnv +tuples :: [(TyCon,DataCon)] +tuples = [mk_tuple i | i <- [0..mAX_TUPLE_SIZE]] + +mk_tuple :: Int -> (TyCon,DataCon) +mk_tuple arity = (tycon, tuple_con) + where + tycon = mkTupleTyCon tc_name tc_kind arity tyvars tuple_con True + tc_name = mkWiredInTyConName tc_uniq mod_name name_str tycon + tc_kind = mkArrowKinds (map tyVarKind tyvars) boxedTypeKind + + tuple_con = pcDataCon dc_uniq mod_name 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 + +unitTyCon = tupleTyCon 0 +pairTyCon = tupleTyCon 2 + +unitDataCon = tupleCon 0 +pairDataCon = tupleCon 2 \end{code} +%************************************************************************ +%* * +\subsection[TysWiredIn-ubx-tuples]{Unboxed Tuple Types} +%* * +%************************************************************************ + \begin{code} -addrTy = UniData addrTyCon [] +unboxedTupleTyCon :: Arity -> TyCon +unboxedTupleTyCon i | i > mAX_TUPLE_SIZE = fst (mk_unboxed_tuple i) + | otherwise = unboxedTupleTyConArr!i -addrTyCon = pcDataTyCon addrTyConKey pRELUDE_BUILTIN SLIT("_Addr") [] [addrDataCon] -addrDataCon = pcDataCon addrDataConKey pRELUDE_BUILTIN SLIT("A#") [] [] [addrPrimTy] addrTyCon nullSpecEnv -\end{code} +unboxedTupleCon :: Arity -> DataCon +unboxedTupleCon i | i > mAX_TUPLE_SIZE = snd (mk_unboxed_tuple i) + | otherwise = unboxedTupleConArr!i -\begin{code} -floatTy = UniData floatTyCon [] +unboxedTupleTyConArr :: Array Int TyCon +unboxedTupleTyConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map fst ubx_tuples) -floatTyCon = pcDataTyCon floatTyConKey pRELUDE_BUILTIN SLIT("Float") [] [floatDataCon] -floatDataCon = pcDataCon floatDataConKey pRELUDE_BUILTIN SLIT("F#") [] [] [floatPrimTy] floatTyCon nullSpecEnv -\end{code} +unboxedTupleConArr :: Array Int DataCon +unboxedTupleConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map snd ubx_tuples) -\begin{code} -doubleTy = UniData doubleTyCon [] +ubx_tuples :: [(TyCon,DataCon)] +ubx_tuples = [mk_unboxed_tuple i | i <- [0..mAX_TUPLE_SIZE]] -doubleTyCon = pcDataTyCon doubleTyConKey pRELUDE_BUILTIN SLIT("Double") [] [doubleDataCon] -doubleDataCon = pcDataCon doubleDataConKey pRELUDE_BUILTIN SLIT("D#") [] [] [doublePrimTy] doubleTyCon nullSpecEnv +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 name_str tycon + tc_kind = mkArrowKinds (map tyVarKind tyvars) unboxedTypeKind + + tuple_con = pcDataCon dc_uniq mod_name 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 + +unboxedPairTyCon = unboxedTupleTyCon 2 +unboxedPairDataCon = unboxedTupleCon 2 \end{code} -\begin{code} -mkStateTy ty = applyTyCon stateTyCon [ty] -realWorldStateTy = mkStateTy realWorldTy -- a common use +%************************************************************************ +%* * +\subsection[TysWiredIn-boxed-prim]{The ``boxed primitive'' types (@Char@, @Int@, etc)} +%* * +%************************************************************************ -stateTyCon = pcDataTyCon stateTyConKey pRELUDE_BUILTIN SLIT("_State") [alpha_tv] [stateDataCon] -stateDataCon - = pcDataCon stateDataConKey pRELUDE_BUILTIN SLIT("S#") - [alpha_tv] [] [mkStatePrimTy alpha] stateTyCon nullSpecEnv +\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. +voidTy = mkTyConTy voidTyCon +voidTyCon = pcNonRecDataTyCon voidTyConKey pREL_GHC SLIT("Void") [] [{-No data cons-}] \end{code} \begin{code} -{- OLD: -byteArrayTyCon - = pcDataTyCon byteArrayTyConKey pRELUDE_ARRAY SLIT("_ByteArray") - [alpha_tv] [byteArrayDataCon] - -byteArrayDataCon - = pcDataCon byteArrayDataConKey pRELUDE_ARRAY SLIT("_ByteArray") - [alpha_tv] [] - [mkTupleTy 2 [alpha, alpha], byteArrayPrimTy] - byteArrayTyCon nullSpecEnv --} +charTy = mkTyConTy charTyCon + +charTyCon = pcNonRecDataTyCon charTyConKey pREL_BASE SLIT("Char") [] [charDataCon] +charDataCon = pcDataCon charDataConKey pREL_BASE SLIT("C#") [] [] [charPrimTy] charTyCon + +stringTy = mkListTy charTy -- convenience only \end{code} \begin{code} -{- OLD: -mutableArrayTyCon - = pcDataTyCon mutableArrayTyConKey gLASGOW_ST SLIT("_MutableArray") - [alpha_tv, beta_tv, gamma_tv] [mutableArrayDataCon] +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, [], _) -> 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 + +int8TyCon = pcNonRecDataTyCon int8TyConKey iNT SLIT("Int8") [] [int8DataCon] where - mutableArrayDataCon - = pcDataCon mutableArrayDataConKey gLASGOW_ST SLIT("_MutableArray") - [alpha_tv, beta_tv, gamma_tv] [] - [mkTupleTy 2 [beta, beta], applyTyCon mutableArrayPrimTyCon [alpha, gamma]] - mutableArrayTyCon nullSpecEnv --} -\end{code} + int8DataCon = pcDataCon int8DataConKey iNT SLIT("I8#") [] [] [intPrimTy] int8TyCon -\begin{code} -{- -mutableByteArrayTyCon - = pcDataTyCon mutableByteArrayTyConKey gLASGOW_ST SLIT("_MutableByteArray") - [alpha_tv, beta_tv] [mutableByteArrayDataCon] - -mutableByteArrayDataCon - = pcDataCon mutableByteArrayDataConKey gLASGOW_ST SLIT("_MutableByteArray") - [alpha_tv, beta_tv] [] - [mkTupleTy 2 [beta, beta], mkMutableByteArrayPrimTy alpha] - mutableByteArrayTyCon nullSpecEnv --} -\end{code} +int16TyCon = pcNonRecDataTyCon int16TyConKey iNT SLIT("Int16") [] [int16DataCon] + where + int16DataCon = pcDataCon int16DataConKey iNT SLIT("I16#") [] [] [intPrimTy] int16TyCon -\begin{code} -stablePtrTyCon - = pcDataTyCon stablePtrTyConKey gLASGOW_MISC SLIT("_StablePtr") - [alpha_tv] [stablePtrDataCon] +int32TyCon = pcNonRecDataTyCon int32TyConKey iNT SLIT("Int32") [] [int32DataCon] where - stablePtrDataCon - = pcDataCon stablePtrDataConKey gLASGOW_MISC SLIT("_StablePtr") - [alpha_tv] [] [applyTyCon stablePtrPrimTyCon [alpha]] stablePtrTyCon nullSpecEnv + int32DataCon = pcDataCon int32DataConKey iNT SLIT("I32#") [] [] [intPrimTy] int32TyCon + +int64Ty = mkTyConTy int64TyCon + +int64TyCon = pcNonRecDataTyCon int64TyConKey pREL_ADDR SLIT("Int64") [] [int64DataCon] +int64DataCon = pcDataCon int64DataConKey pREL_ADDR SLIT("I64#") [] [] [int64PrimTy] int64TyCon \end{code} \begin{code} -mallocPtrTyCon - = pcDataTyCon mallocPtrTyConKey gLASGOW_MISC SLIT("_MallocPtr") - [] [mallocPtrDataCon] + +wordTy = mkTyConTy wordTyCon + +wordTyCon = pcNonRecDataTyCon wordTyConKey pREL_ADDR SLIT("Word") [] [wordDataCon] +wordDataCon = pcDataCon wordDataConKey pREL_ADDR SLIT("W#") [] [] [wordPrimTy] wordTyCon + +word8TyCon = pcNonRecDataTyCon word8TyConKey wORD SLIT("Word8") [] [word8DataCon] where - mallocPtrDataCon - = pcDataCon mallocPtrDataConKey gLASGOW_MISC SLIT("_MallocPtr") - [] [] [applyTyCon mallocPtrPrimTyCon []] mallocPtrTyCon nullSpecEnv -\end{code} + word8DataCon = pcDataCon word8DataConKey wORD SLIT("W8#") [] [] [wordPrimTy] word8TyCon -%************************************************************************ -%* * -\subsection[TysWiredIn-Integer]{@Integer@ and its related ``pairing'' types} -%* * -%************************************************************************ +word16TyCon = pcNonRecDataTyCon word16TyConKey wORD SLIT("Word16") [] [word16DataCon] + where + word16DataCon = pcDataCon word16DataConKey wORD SLIT("W16#") [] [] [wordPrimTy] word16TyCon -@Integer@ and its pals are not really primitive. @Integer@ itself, first: -\begin{code} -integerTy :: UniType -integerTy = UniData integerTyCon [] - -integerTyCon = pcDataTyCon integerTyConKey pRELUDE_BUILTIN SLIT("Integer") [] [integerDataCon] - -#ifndef DPH -integerDataCon = pcDataCon integerDataConKey pRELUDE_BUILTIN SLIT("J#") - [] [] [intPrimTy, intPrimTy, byteArrayPrimTy] integerTyCon nullSpecEnv -#else --- DPH: For the time being we implement Integers in the same way as Ints. -integerDataCon = pcDataCon integerDataConKey pRELUDE_BUILTIN SLIT("J#") - [] [] [intPrimTy] integerTyCon nullSpecEnv -#endif {- Data Parallel Haskell -} +word32TyCon = pcNonRecDataTyCon word32TyConKey wORD SLIT("Word32") [] [word32DataCon] + where + word32DataCon = pcDataCon word32DataConKey wORD SLIT("W32#") [] [] [wordPrimTy] word32TyCon + +word64Ty = mkTyConTy word64TyCon + +word64TyCon = pcNonRecDataTyCon word64TyConKey pREL_ADDR SLIT("Word64") [] [word64DataCon] +word64DataCon = pcDataCon word64DataConKey pREL_ADDR SLIT("W64#") [] [] [word64PrimTy] word64TyCon \end{code} -And the other pairing types: \begin{code} -return2GMPsTyCon = pcDataTyCon return2GMPsTyConKey - pRELUDE_BUILTIN SLIT("_Return2GMPs") [] [return2GMPsDataCon] +addrTy = mkTyConTy addrTyCon -return2GMPsDataCon - = pcDataCon return2GMPsDataConKey pRELUDE_BUILTIN SLIT("_Return2GMPs") [] [] - [intPrimTy, intPrimTy, byteArrayPrimTy, - intPrimTy, intPrimTy, byteArrayPrimTy] return2GMPsTyCon nullSpecEnv +addrTyCon = pcNonRecDataTyCon addrTyConKey pREL_ADDR SLIT("Addr") [] [addrDataCon] +addrDataCon = pcDataCon addrDataConKey pREL_ADDR SLIT("A#") [] [] [addrPrimTy] addrTyCon -returnIntAndGMPTyCon = pcDataTyCon returnIntAndGMPTyConKey - pRELUDE_BUILTIN SLIT("_ReturnIntAndGMP") [] [returnIntAndGMPDataCon] +isAddrTy :: GenType flexi -> Bool +isAddrTy ty + = case (splitAlgTyConApp_maybe ty) of + Just (tycon, [], _) -> getUnique tycon == addrTyConKey + _ -> False -returnIntAndGMPDataCon - = pcDataCon returnIntAndGMPDataConKey pRELUDE_BUILTIN SLIT("_ReturnIntAndGMP") [] [] - [intPrimTy, intPrimTy, intPrimTy, byteArrayPrimTy] returnIntAndGMPTyCon nullSpecEnv \end{code} -%************************************************************************ -%* * -\subsection[TysWiredIn-state-pairing]{``State-pairing'' types} -%* * -%************************************************************************ +\begin{code} +floatTy = mkTyConTy floatTyCon + +floatTyCon = pcNonRecDataTyCon floatTyConKey pREL_BASE SLIT("Float") [] [floatDataCon] +floatDataCon = pcDataCon floatDataConKey pREL_BASE SLIT("F#") [] [] [floatPrimTy] floatTyCon -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}. +isFloatTy :: GenType flexi -> Bool +isFloatTy ty + = case (splitAlgTyConApp_maybe ty) of + Just (tycon, [], _) -> getUnique tycon == floatTyConKey + _ -> False -We fish one of these \tr{StateAnd#} things with -@getStatePairingConInfo@ (given a little way down). +\end{code} \begin{code} -stateAndPtrPrimTyCon - = pcDataTyCon stateAndPtrPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndPtr#") - [alpha_tv, beta_tv] [stateAndPtrPrimDataCon] -stateAndPtrPrimDataCon - = pcDataCon stateAndPtrPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndPtr#") - [alpha_tv, beta_tv] [] [mkStatePrimTy alpha, beta] - stateAndPtrPrimTyCon nullSpecEnv - -stateAndCharPrimTyCon - = pcDataTyCon stateAndCharPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndChar#") - [alpha_tv] [stateAndCharPrimDataCon] -stateAndCharPrimDataCon - = pcDataCon stateAndCharPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndChar#") - [alpha_tv] [] [mkStatePrimTy alpha, charPrimTy] - stateAndCharPrimTyCon nullSpecEnv - -stateAndIntPrimTyCon - = pcDataTyCon stateAndIntPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndInt#") - [alpha_tv] [stateAndIntPrimDataCon] -stateAndIntPrimDataCon - = pcDataCon stateAndIntPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndInt#") - [alpha_tv] [] [mkStatePrimTy alpha, intPrimTy] - stateAndIntPrimTyCon nullSpecEnv - -stateAndWordPrimTyCon - = pcDataTyCon stateAndWordPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndWord#") - [alpha_tv] [stateAndWordPrimDataCon] -stateAndWordPrimDataCon - = pcDataCon stateAndWordPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndWord#") - [alpha_tv] [] [mkStatePrimTy alpha, wordPrimTy] - stateAndWordPrimTyCon nullSpecEnv - -stateAndAddrPrimTyCon - = pcDataTyCon stateAndAddrPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndAddr#") - [alpha_tv] [stateAndAddrPrimDataCon] -stateAndAddrPrimDataCon - = pcDataCon stateAndAddrPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndAddr#") - [alpha_tv] [] [mkStatePrimTy alpha, addrPrimTy] - stateAndAddrPrimTyCon nullSpecEnv - -stateAndStablePtrPrimTyCon - = pcDataTyCon stateAndStablePtrPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndStablePtr#") - [alpha_tv, beta_tv] [stateAndStablePtrPrimDataCon] -stateAndStablePtrPrimDataCon - = pcDataCon stateAndStablePtrPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndStablePtr#") - [alpha_tv, beta_tv] [] - [mkStatePrimTy alpha, applyTyCon stablePtrPrimTyCon [beta]] - stateAndStablePtrPrimTyCon nullSpecEnv - -stateAndMallocPtrPrimTyCon - = pcDataTyCon stateAndMallocPtrPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndMallocPtr#") - [alpha_tv] [stateAndMallocPtrPrimDataCon] -stateAndMallocPtrPrimDataCon - = pcDataCon stateAndMallocPtrPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndMallocPtr#") - [alpha_tv] [] - [mkStatePrimTy alpha, applyTyCon mallocPtrPrimTyCon []] - stateAndMallocPtrPrimTyCon nullSpecEnv - -stateAndFloatPrimTyCon - = pcDataTyCon stateAndFloatPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndFloat#") - [alpha_tv] [stateAndFloatPrimDataCon] -stateAndFloatPrimDataCon - = pcDataCon stateAndFloatPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndFloat#") - [alpha_tv] [] [mkStatePrimTy alpha, floatPrimTy] - stateAndFloatPrimTyCon nullSpecEnv - -stateAndDoublePrimTyCon - = pcDataTyCon stateAndDoublePrimTyConKey pRELUDE_BUILTIN SLIT("StateAndDouble#") - [alpha_tv] [stateAndDoublePrimDataCon] -stateAndDoublePrimDataCon - = pcDataCon stateAndDoublePrimDataConKey pRELUDE_BUILTIN SLIT("StateAndDouble#") - [alpha_tv] [] [mkStatePrimTy alpha, doublePrimTy] - stateAndDoublePrimTyCon nullSpecEnv +doubleTy = mkTyConTy doubleTyCon + +isDoubleTy :: GenType flexi -> Bool +isDoubleTy ty + = case (splitAlgTyConApp_maybe ty) of + Just (tycon, [], _) -> getUnique tycon == doubleTyConKey + _ -> False + +doubleTyCon = pcNonRecDataTyCon doubleTyConKey pREL_BASE SLIT("Double") [] [doubleDataCon] +doubleDataCon = pcDataCon doubleDataConKey pREL_BASE SLIT("D#") [] [] [doublePrimTy] doubleTyCon \end{code} \begin{code} -stateAndArrayPrimTyCon - = pcDataTyCon stateAndArrayPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndArray#") - [alpha_tv, beta_tv] [stateAndArrayPrimDataCon] -stateAndArrayPrimDataCon - = pcDataCon stateAndArrayPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndArray#") - [alpha_tv, beta_tv] [] [mkStatePrimTy alpha, mkArrayPrimTy beta] - stateAndArrayPrimTyCon nullSpecEnv - -stateAndMutableArrayPrimTyCon - = pcDataTyCon stateAndMutableArrayPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndMutableArray#") - [alpha_tv, beta_tv] [stateAndMutableArrayPrimDataCon] -stateAndMutableArrayPrimDataCon - = pcDataCon stateAndMutableArrayPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndMutableArray#") - [alpha_tv, beta_tv] [] [mkStatePrimTy alpha, mkMutableArrayPrimTy alpha beta] - stateAndMutableArrayPrimTyCon nullSpecEnv - -stateAndByteArrayPrimTyCon - = pcDataTyCon stateAndByteArrayPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndByteArray#") - [alpha_tv] [stateAndByteArrayPrimDataCon] -stateAndByteArrayPrimDataCon - = pcDataCon stateAndByteArrayPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndByteArray#") - [alpha_tv] [] [mkStatePrimTy alpha, byteArrayPrimTy] - stateAndByteArrayPrimTyCon nullSpecEnv - -stateAndMutableByteArrayPrimTyCon - = pcDataTyCon stateAndMutableByteArrayPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndMutableByteArray#") - [alpha_tv] [stateAndMutableByteArrayPrimDataCon] -stateAndMutableByteArrayPrimDataCon - = pcDataCon stateAndMutableByteArrayPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndMutableByteArray#") - [alpha_tv] [] [mkStatePrimTy alpha, applyTyCon mutableByteArrayPrimTyCon [alpha]] - stateAndMutableByteArrayPrimTyCon nullSpecEnv - -stateAndSynchVarPrimTyCon - = pcDataTyCon stateAndSynchVarPrimTyConKey pRELUDE_BUILTIN SLIT("StateAndSynchVar#") - [alpha_tv, beta_tv] [stateAndSynchVarPrimDataCon] -stateAndSynchVarPrimDataCon - = pcDataCon stateAndSynchVarPrimDataConKey pRELUDE_BUILTIN SLIT("StateAndSynchVar#") - [alpha_tv, beta_tv] [] [mkStatePrimTy alpha, mkSynchVarPrimTy alpha beta] - stateAndSynchVarPrimTyCon nullSpecEnv +mkStateTy ty = mkTyConApp stateTyCon [ty] +realWorldStateTy = mkStateTy realWorldTy -- a common use + +stateTyCon = pcNonRecDataTyCon stateTyConKey pREL_ST SLIT("State") alpha_tyvar [stateDataCon] +stateDataCon + = pcDataCon stateDataConKey pREL_ST SLIT("S#") + alpha_tyvar [] [mkStatePrimTy alphaTy] stateTyCon \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} +stablePtrTyCon + = pcNonRecDataTyCon stablePtrTyConKey pREL_FOREIGN SLIT("StablePtr") + alpha_tyvar [stablePtrDataCon] + where + stablePtrDataCon + = pcDataCon stablePtrDataConKey pREL_FOREIGN SLIT("StablePtr") + alpha_tyvar [] [mkStablePtrPrimTy alphaTy] stablePtrTyCon +\end{code} \begin{code} -getStatePairingConInfo - :: UniType -- primitive type - -> (Id, -- state pair constructor for prim type - UniType) -- type of state pair - -getStatePairingConInfo prim_ty - = case (getUniDataTyCon_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 = applyTyCon pair_tycon (realWorldTy : drop num_tys tys_applied) - in - (pair_con, pair_ty) +foreignObjTyCon + = pcNonRecDataTyCon foreignObjTyConKey pREL_IO_BASE SLIT("ForeignObj") + [] [foreignObjDataCon] 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)), - ] + foreignObjDataCon + = pcDataCon foreignObjDataConKey pREL_IO_BASE SLIT("ForeignObj") + [] [] [foreignObjPrimTy] foreignObjTyCon \end{code} %************************************************************************ %* * -\subsection[TysWiredIn-ST]{The basic @_ST@ state-transformer type} +\subsection[TysWiredIn-Integer]{@Integer@ and its related ``pairing'' types} %* * %************************************************************************ -This is really just an ordinary synonym, except it is ABSTRACT. - +@Integer@ and its pals are not really primitive. @Integer@ itself, first: \begin{code} -mkStateTransformerTy s a = applyTyCon stTyCon [s, a] - -stTyCon - = mkSynonymTyCon - stTyConKey - (mkPreludeCoreName gLASGOW_ST SLIT("_ST")) - 2 - [alpha_tv, beta_tv] - (mkStateTy alpha `UniFun` mkTupleTy 2 [beta, mkStateTy alpha]) - True -- ToDo: make... *** ABSTRACT *** +integerTy :: GenType t +integerTy = mkTyConTy integerTyCon + +integerTyCon = pcNonRecDataTyCon integerTyConKey pREL_BASE SLIT("Integer") [] [integerDataCon] + +integerDataCon = pcDataCon integerDataConKey pREL_BASE SLIT("J#") + [] [] [intPrimTy, intPrimTy, byteArrayPrimTy] integerTyCon + +isIntegerTy :: GenType flexi -> Bool +isIntegerTy ty + = case (splitAlgTyConApp_maybe ty) of + Just (tycon, [], _) -> getUnique tycon == integerTyConKey + _ -> False \end{code} + %************************************************************************ %* * -\subsection[TysWiredIn-IO]{The @PrimIO@ and @IO@ monadic-I/O types} +\subsection[TysWiredIn-ext-type]{External types} %* * %************************************************************************ -@PrimIO@ and @IO@ really are just a plain synonyms. +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} -mkPrimIoTy a = applyTyCon primIoTyCon [a] - -primIoTyCon - = mkSynonymTyCon - primIoTyConKey - (mkPreludeCoreName pRELUDE_PRIMIO SLIT("PrimIO")) - 1 - [alpha_tv] - (mkStateTransformerTy realWorldTy alpha) - True -- need not be abstract +isFFIArgumentTy :: Type -> Bool +isFFIArgumentTy ty = + (opt_GlasgowExts && isUnLiftedType ty) || --leave out for now: maybeToBool (maybeBoxedPrimType ty))) || + case (splitAlgTyConApp_maybe ty) of + Just (tycon, _, _) -> (getUnique tycon) `elem` primArgTyConKeys + _ -> 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 ] + \end{code} %************************************************************************ @@ -522,33 +553,13 @@ primitive counterpart. {\em END IDLE SPECULATION BY SIMON} \begin{code} -boolTy = UniData boolTyCon [] - -boolTyCon = pcDataTyCon boolTyConKey pRELUDE_CORE SLIT("Bool") [] [falseDataCon, trueDataCon] - -falseDataCon = pcDataCon falseDataConKey pRELUDE_CORE SLIT("False") [] [] [] boolTyCon nullSpecEnv -trueDataCon = pcDataCon trueDataConKey pRELUDE_CORE SLIT("True") [] [] [] boolTyCon nullSpecEnv -\end{code} - -%************************************************************************ -%* * -\subsection[TysWiredIn-CMP-TAG]{The @CMP_TAG#@ type (for fast `derived' comparisons)} -%* * -%************************************************************************ - -\begin{code} ---------------------------------------------- --- data _CMP_TAG = _LT | _EQ | _GT deriving () ---------------------------------------------- - -cmpTagTy = UniData cmpTagTyCon [] +boolTy = mkTyConTy boolTyCon -cmpTagTyCon = pcDataTyCon cmpTagTyConKey pRELUDE_BUILTIN SLIT("_CMP_TAG") [] - [ltPrimDataCon, eqPrimDataCon, gtPrimDataCon] +boolTyCon = pcTyCon EnumType NonRecursive boolTyConKey + pREL_BASE SLIT("Bool") [] [falseDataCon, trueDataCon] -ltPrimDataCon = pcDataCon ltTagDataConKey pRELUDE_BUILTIN SLIT("_LT") [] [] [] cmpTagTyCon nullSpecEnv -eqPrimDataCon = pcDataCon eqTagDataConKey pRELUDE_BUILTIN SLIT("_EQ") [] [] [] cmpTagTyCon nullSpecEnv -gtPrimDataCon = pcDataCon gtTagDataConKey pRELUDE_BUILTIN SLIT("_GT") [] [] [] cmpTagTyCon nullSpecEnv +falseDataCon = pcDataCon falseDataConKey pREL_BASE SLIT("False") [] [] [] boolTyCon +trueDataCon = pcDataCon trueDataConKey pREL_BASE SLIT("True") [] [] [] boolTyCon \end{code} %************************************************************************ @@ -558,38 +569,29 @@ gtPrimDataCon = pcDataCon gtTagDataConKey pRELUDE_BUILTIN SLIT("_GT") [] [] [] %************************************************************************ Special syntax, deeply wired in, but otherwise an ordinary algebraic -data type: +data types: \begin{verbatim} -data List a = Nil | a : (List a) +data [] a = [] | a : (List a) +data () = () +data (,) a b = (,,) a b +... \end{verbatim} \begin{code} -mkListTy :: UniType -> UniType -mkListTy ty = UniData listTyCon [ty] +mkListTy :: GenType t -> GenType t +mkListTy ty = mkTyConApp listTyCon [ty] -alphaListTy = mkSigmaTy [alpha_tv] [] (mkListTy alpha) +alphaListTy = mkSigmaTy alpha_tyvar [] (mkTyConApp listTyCon alpha_ty) -listTyCon = pcDataTyCon listTyConKey pRELUDE_BUILTIN SLIT("List") [alpha_tv] [nilDataCon, consDataCon] +listTyCon = pcRecDataTyCon listTyConKey pREL_BASE SLIT("[]") + alpha_tyvar [nilDataCon, consDataCon] -nilDataCon = pcDataCon nilDataConKey pRELUDE_BUILTIN SLIT("Nil") [alpha_tv] [] [] listTyCon - (pcGenerateDataSpecs alphaListTy) -consDataCon = pcDataCon consDataConKey pRELUDE_BUILTIN SLIT(":") - [alpha_tv] [] [alpha, mkListTy alpha] listTyCon - (pcGenerateDataSpecs alphaListTy) -\end{code} - -This is the @_Build@ data constructor, it does {\em not} appear inside -listTyCon. It has this type: \tr{((a -> b -> b) -> b -> b) -> [a]}. -\begin{code} -{- NOT USED: -buildDataCon - = pcDataCon buildDataConKey pRELUDE_BUILTIN "Build" - [alpha_tv] [] [ - mkSigmaTy [beta_tv] [] - ((alpha `UniFun` (beta `UniFun` beta)) - `UniFun` (beta - `UniFun` beta))] listTyCon nullSpecEnv --} +nilDataCon = pcDataCon nilDataConKey pREL_BASE SLIT("[]") alpha_tyvar [] [] listTyCon +consDataCon = pcDataCon consDataConKey pREL_BASE SLIT(":") + 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) \end{code} %************************************************************************ @@ -603,14 +605,12 @@ family. \begin{itemize} \item -They have a special family of type constructors, of type -@TyCon@\srcloc{uniType/TyCon.lhs}. +They have a special family of type constructors, of type @TyCon@ These contain the tycon arity, but don't require a Unique. \item They have a special family of constructors, of type -@Id@\srcloc{basicTypes/Id.lhs}. Again these contain their arity but -don't need a Unique. +@Id@. Again these contain their arity but don't need a Unique. \item There should be a magic way of generating the info tables and @@ -641,117 +641,11 @@ done by enumeration\srcloc{lib/prelude/InTup?.hs}. \end{itemize} \begin{code} -mkTupleTy :: Int -> [UniType] -> UniType - -mkTupleTy arity tys = applyTyCon (mkTupleTyCon arity) tys - -unitTy = mkTupleTy 0 [] -\end{code} - -%************************************************************************ -%* * -\subsection[TysWiredIn-Ratios]{@Ratio@ and @Rational@} -%* * -%************************************************************************ - -ToDo: make this (mostly) go away. - -\begin{code} -rationalTy :: UniType - -mkRatioTy ty = UniData ratioTyCon [ty] -rationalTy = mkRatioTy integerTy - -ratioTyCon = pcDataTyCon ratioTyConKey pRELUDE_RATIO SLIT("Ratio") [alpha_tv] [ratioDataCon] - -ratioDataCon = pcDataCon ratioDataConKey pRELUDE_RATIO SLIT(":%") - [alpha_tv] [{-(integralClass,alpha)-}] [alpha, alpha] ratioTyCon nullSpecEnv - -- context omitted to match lib/prelude/ defn of "data Ratio ..." - -rationalTyCon - = mkSynonymTyCon - rationalTyConKey - (mkPreludeCoreName pRELUDE_RATIO SLIT("Rational")) - 0 -- arity - [] -- tyvars - rationalTy -- == mkRatioTy integerTy - True -- unabstract -\end{code} - -%************************************************************************ -%* * -\subsection[TysWiredIn-_Lift]{@_Lift@ type: to support array indexing} -%* * -%************************************************************************ - -Again, deeply turgid: \tr{data _Lift a = _Lift a}. - -\begin{code} -mkLiftTy ty = applyTyCon liftTyCon [ty] - -{- -mkLiftTy ty - = mkSigmaTy tvs theta (UniData liftTyCon [tau]) - where - (tvs, theta, tau) = splitType ty - -isLiftTy ty - = case getUniDataTyCon_maybe tau of - Just (tycon, tys, _) -> tycon == liftTyCon - Nothing -> False - where - (tvs, theta, tau) = splitType ty --} - - -alphaLiftTy = mkSigmaTy [alpha_tv] [] (UniData liftTyCon [alpha]) - -liftTyCon - = pcDataTyCon liftTyConKey pRELUDE_BUILTIN SLIT("_Lift") [alpha_tv] [liftDataCon] - -liftDataCon - = pcDataCon liftDataConKey pRELUDE_BUILTIN SLIT("_Lift") - [alpha_tv] [] [alpha] liftTyCon - ((pcGenerateDataSpecs alphaLiftTy) `addOneToSpecEnv` - (SpecInfo [Just realWorldStatePrimTy] 0 bottom)) - where - bottom = panic "liftDataCon:State# _RealWorld" -\end{code} - - -%************************************************************************ -%* * -\subsection[TysWiredIn-for-convenience]{Types wired in for convenience (e.g., @String@)} -%* * -%************************************************************************ - -\begin{code} -stringTy = mkListTy charTy - -stringTyCon - = mkSynonymTyCon - stringTyConKey - (mkPreludeCoreName pRELUDE_CORE SLIT("String")) - 0 - [] -- type variables - stringTy - True -- unabstract -\end{code} - -\begin{code} -{- UNUSED: -packedStringTy = applyTyCon packedStringTyCon [] - -packedStringTyCon - = pcDataTyCon packedStringTyConKey pRELUDE_PS SLIT("_PackedString") [] - [psDataCon, cpsDataCon] +mkTupleTy :: Int -> [GenType t] -> GenType t +mkTupleTy arity tys = mkTyConApp (tupleTyCon arity) tys -psDataCon - = pcDataCon psDataConKey pRELUDE_PS SLIT("_PS") - [] [] [intPrimTy, byteArrayPrimTy] packedStringTyCon +mkUnboxedTupleTy :: Int -> [GenType t] -> GenType t +mkUnboxedTupleTy arity tys = mkTyConApp (unboxedTupleTyCon arity) tys -cpsDataCon - = pcDataCon cpsDataConKey pRELUDE_PS SLIT("_CPS") - [] [] [addrPrimTy] packedStringTyCon --} +unitTy = mkTupleTy 0 [] \end{code}