X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fprelude%2FTysWiredIn.lhs;h=2975922af8db9f37b47845f3f3744e809ea93859;hb=e6834cad29914f123edb32c20d42b16e3308e667;hp=e132166a8e2124a374fc1cb5a2d0677cc4655ea7;hpb=1da7b45d4cf8c70dae8525a00eb2cd68160cf813;p=ghc-hetmet.git diff --git a/ghc/compiler/prelude/TysWiredIn.lhs b/ghc/compiler/prelude/TysWiredIn.lhs index e132166..2975922 100644 --- a/ghc/compiler/prelude/TysWiredIn.lhs +++ b/ghc/compiler/prelude/TysWiredIn.lhs @@ -11,9 +11,8 @@ types and operations.'' \begin{code} module TysWiredIn ( - addrDataCon, - addrTy, - addrTyCon, + wiredInTyCons, genericTyCons, + boolTy, boolTyCon, charDataCon, @@ -22,24 +21,20 @@ module TysWiredIn ( consDataCon, doubleDataCon, doubleTy, - isDoubleTy, doubleTyCon, falseDataCon, falseDataConId, floatDataCon, floatTy, - isFloatTy, floatTyCon, intDataCon, intTy, intTyCon, - isIntTy, integerTy, integerTyCon, smallIntegerDataCon, largeIntegerDataCon, - isIntegerTy, listTyCon, @@ -49,11 +44,15 @@ module TysWiredIn ( -- tuples mkTupleTy, tupleTyCon, tupleCon, - unitTyCon, unitDataConId, pairTyCon, + unitTyCon, unitDataCon, unitDataConId, pairTyCon, unboxedSingletonTyCon, unboxedSingletonDataCon, unboxedPairTyCon, unboxedPairDataCon, - stablePtrTyCon, + -- Generics + genUnitTyCon, genUnitDataCon, + plusTyCon, inrDataCon, inlDataCon, + crossTyCon, crossDataCon, + stringTy, trueDataCon, trueDataConId, unitTy, @@ -62,19 +61,15 @@ module TysWiredIn ( wordTy, wordTyCon, - isFFIArgumentTy, -- :: Bool -> Type -> Bool - isFFIResultTy, -- :: Type -> Bool - isFFIExternalTy, -- :: Type -> Bool - isFFIDynResultTy, -- :: Type -> Bool - isFFILabelTy, -- :: Type -> Bool - isAddrTy, -- :: Type -> Bool - isForeignObjTy -- :: Type -> Bool - + -- parallel arrays + mkPArrTy, + parrTyCon, parrFakeCon, isPArrTyCon, isPArrFakeCon ) where #include "HsVersions.h" -import {-# SOURCE #-} MkId( mkDataConId, mkDataConWrapId ) +import {-# SOURCE #-} MkId( mkDataConWorkId ) +import {-# SOURCE #-} Generics( mkTyConGenInfo ) -- friends: import PrelNames @@ -82,77 +77,130 @@ import TysPrim -- others: import Constants ( mAX_TUPLE_SIZE ) -import Module ( Module, mkPrelModule ) -import Name ( mkWiredInTyConName, mkWiredInIdName, mkSrcOccFS, mkWorkerOcc, dataName ) -import DataCon ( DataCon, StrictnessMark(..), mkDataCon, dataConId ) +import Module ( mkBasePkgModule ) +import Name ( Name, nameUnique, nameOccName, + nameModule, mkWiredInName ) +import OccName ( mkOccFS, tcName, dataName, mkDataConWorkerOcc, mkGenOcc1, mkGenOcc2 ) +import DataCon ( DataCon, mkDataCon, dataConWorkId, dataConSourceArity ) import Var ( TyVar, tyVarKind ) -import TyCon ( TyCon, AlgTyConFlavour(..), ArgVrcs, tyConDataCons, - mkAlgTyCon, mkSynTyCon, mkTupleTyCon, isUnLiftedTyCon +import TyCon ( TyCon, AlgTyConFlavour(..), DataConDetails(..), tyConDataCons, + mkTupleTyCon, mkAlgTyCon, tyConName ) + import BasicTypes ( Arity, RecFlag(..), Boxity(..), isBoxed ) -import Type ( Type, mkTyConTy, mkTyConApp, mkSigmaTy, mkTyVarTys, - mkArrowKinds, boxedTypeKind, unboxedTypeKind, - mkFunTy, mkFunTys, - splitTyConApp_maybe, repType, - TauType, ClassContext ) -import Unique -import CmdLineOpts ( opt_GlasgowExts ) + +import Type ( Type, mkTyConTy, mkTyConApp, mkTyVarTy, mkTyVarTys, + mkArrowKinds, liftedTypeKind, unliftedTypeKind, + ThetaType ) +import Unique ( incrUnique, mkTupleTyConUnique, + mkTupleDataConUnique, mkPArrDataConUnique ) +import PrelNames import Array +import FastString alpha_tyvar = [alphaTyVar] alpha_ty = [alphaTy] alpha_beta_tyvars = [alphaTyVar, betaTyVar] +\end{code} + + +%************************************************************************ +%* * +\subsection{Wired in type constructors} +%* * +%************************************************************************ -pcRecDataTyCon, pcNonRecDataTyCon - :: Unique{-TyConKey-} -> Module -> FAST_STRING - -> [TyVar] -> ArgVrcs -> [DataCon] -> TyCon +If you change which things are wired in, make sure you change their +names in PrelNames, so they use wTcQual, wDataQual, etc -pcRecDataTyCon = pcTyCon DataTyCon Recursive +\begin{code} +wiredInTyCons :: [TyCon] +wiredInTyCons = data_tycons ++ tuple_tycons ++ unboxed_tuple_tycons + +data_tycons = genericTyCons ++ + [ boolTyCon + , charTyCon + , doubleTyCon + , floatTyCon + , intTyCon + , integerTyCon + , listTyCon + , parrTyCon + , 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 key mod str tyvars argvrcs cons +pcTyCon new_or_data is_rec name tyvars argvrcs cons = tycon where - tycon = mkAlgTyCon name kind - tyvars - [] -- No context + tycon = mkAlgTyCon name kind + tyvars + [] -- No context argvrcs - cons - (length cons) - [] -- No derivings - new_or_data - is_rec - - name = mkWiredInTyConName key mod str tycon - kind = mkArrowKinds (map tyVarKind tyvars) boxedTypeKind - -pcSynTyCon key mod str kind arity tyvars expansion argvrcs -- this fun never used! - = tycon + (DataCons 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 = mkSynTyCon name kind arity tyvars expansion argvrcs - name = mkWiredInTyConName key mod str tycon - -pcDataCon :: Unique{-DataConKey-} -> Module -> FAST_STRING - -> [TyVar] -> ClassContext -> [TauType] -> TyCon -> DataCon + 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 -> [Type] -> TyCon -> DataCon +-- The Name should be in the DataName name space; it's the name +-- of the DataCon itself. +-- -- 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 mod str tyvars context arg_tys tycon +-- the first is used for the datacon itself, +-- the second is used for the "worker name" + +pcDataCon dc_name tyvars context arg_tys tycon = data_con where - 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_occ = mkSrcOccFS dataName str - wrap_name = mkWiredInIdName wrap_key mod wrap_occ wrap_id - wrap_id = mkDataConWrapId data_con + data_con = mkDataCon dc_name + [{- No strictness -}] + [{- No labelled fields -}] + tyvars context [] [] arg_tys tycon work_id + Nothing {- No wrapper for wired-in things + (they are too simple to need one) -} + + mod = nameModule dc_name + wrk_occ = mkDataConWorkerOcc (nameOccName dc_name) + wrk_key = incrUnique (nameUnique dc_name) + wrk_name = mkWiredInName mod wrk_occ wrk_key + work_id = mkDataConWorkId wrk_name data_con \end{code} @@ -174,30 +222,33 @@ 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]] +boxedTupleArr = listArray (0,mAX_TUPLE_SIZE) [mk_tuple Boxed i | i <- [0..mAX_TUPLE_SIZE]] +unboxedTupleArr = listArray (0,mAX_TUPLE_SIZE) [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 - tc_name = mkWiredInTyConName tc_uniq mod name_str tycon + 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 = boxedTypeKind - | otherwise = unboxedTypeKind + res_kind | isBoxed boxity = liftedTypeKind + | otherwise = unliftedTypeKind tyvars | isBoxed boxity = take arity alphaTyVars | otherwise = take arity openAlphaTyVars - tuple_con = pcDataCon dc_uniq mod name_str tyvars [] tyvar_tys tycon + 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 + mod = mkBasePkgModule mod_name + gen_info = mk_tc_gen_info mod tc_uniq tc_name tycon unitTyCon = tupleTyCon Boxed 0 -unitDataConId = dataConId (head (tyConDataCons unitTyCon)) +unitDataCon = head (tyConDataCons unitTyCon) +unitDataConId = dataConWorkId unitDataCon pairTyCon = tupleTyCon Boxed 2 @@ -221,7 +272,7 @@ unboxedPairDataCon = tupleCon Unboxed 2 -- -- data Void = -- No constructors! -- --- ) It's boxed; there is only one value of this +-- ) It's lifted; there is only one value of this -- type, namely "void", whose semantics is just bottom. -- -- Haskell 98 drops the definition of a Void type, so we just 'simulate' @@ -233,8 +284,8 @@ voidTy = unitTy \begin{code} charTy = mkTyConTy charTyCon -charTyCon = pcNonRecDataTyCon charTyConKey pREL_BASE SLIT("Char") [] [] [charDataCon] -charDataCon = pcDataCon charDataConKey pREL_BASE SLIT("C#") [] [] [charPrimTy] charTyCon +charTyCon = pcNonRecDataTyCon charTyConName [] [] [charDataCon] +charDataCon = pcDataCon charDataConName [] [] [charPrimTy] charTyCon stringTy = mkListTy charTy -- convenience only \end{code} @@ -242,73 +293,31 @@ stringTy = mkListTy charTy -- convenience only \begin{code} intTy = mkTyConTy intTyCon -intTyCon = pcNonRecDataTyCon intTyConKey pREL_BASE SLIT("Int") [] [] [intDataCon] -intDataCon = pcDataCon intDataConKey pREL_BASE SLIT("I#") [] [] [intPrimTy] intTyCon - -isIntTy :: Type -> Bool -isIntTy = isTyCon intTyConKey +intTyCon = pcNonRecDataTyCon intTyConName [] [] [intDataCon] +intDataCon = pcDataCon intDataConName [] [] [intPrimTy] intTyCon \end{code} \begin{code} - wordTy = mkTyConTy wordTyCon -wordTyCon = pcNonRecDataTyCon wordTyConKey pREL_ADDR SLIT("Word") [] [] [wordDataCon] -wordDataCon = pcDataCon wordDataConKey pREL_ADDR SLIT("W#") [] [] [wordPrimTy] wordTyCon -\end{code} - -\begin{code} -addrTy = mkTyConTy addrTyCon - -addrTyCon = pcNonRecDataTyCon addrTyConKey pREL_ADDR SLIT("Addr") [] [] [addrDataCon] -addrDataCon = pcDataCon addrDataConKey pREL_ADDR SLIT("A#") [] [] [addrPrimTy] addrTyCon - -isAddrTy :: Type -> Bool -isAddrTy = isTyCon addrTyConKey +wordTyCon = pcNonRecDataTyCon wordTyConName [] [] [wordDataCon] +wordDataCon = pcDataCon wordDataConName [] [] [wordPrimTy] wordTyCon \end{code} \begin{code} floatTy = mkTyConTy floatTyCon -floatTyCon = pcNonRecDataTyCon floatTyConKey pREL_FLOAT SLIT("Float") [] [] [floatDataCon] -floatDataCon = pcDataCon floatDataConKey pREL_FLOAT SLIT("F#") [] [] [floatPrimTy] floatTyCon - -isFloatTy :: Type -> Bool -isFloatTy = isTyCon floatTyConKey +floatTyCon = pcNonRecDataTyCon floatTyConName [] [] [floatDataCon] +floatDataCon = pcDataCon floatDataConName [] [] [floatPrimTy] floatTyCon \end{code} \begin{code} doubleTy = mkTyConTy doubleTyCon -isDoubleTy :: Type -> Bool -isDoubleTy = isTyCon doubleTyConKey - -doubleTyCon = pcNonRecDataTyCon doubleTyConKey pREL_FLOAT SLIT("Double") [] [] [doubleDataCon] -doubleDataCon = pcDataCon doubleDataConKey pREL_FLOAT SLIT("D#") [] [] [doublePrimTy] doubleTyCon +doubleTyCon = pcNonRecDataTyCon doubleTyConName [] [] [doubleDataCon] +doubleDataCon = pcDataCon doubleDataConName [] [] [doublePrimTy] doubleTyCon \end{code} -\begin{code} -stablePtrTyCon - = pcNonRecDataTyCon stablePtrTyConKey pREL_STABLE SLIT("StablePtr") - alpha_tyvar [(True,False)] [stablePtrDataCon] - where - stablePtrDataCon - = pcDataCon stablePtrDataConKey pREL_STABLE SLIT("StablePtr") - alpha_tyvar [] [mkStablePtrPrimTy alphaTy] stablePtrTyCon -\end{code} - -\begin{code} -foreignObjTyCon - = pcNonRecDataTyCon foreignObjTyConKey pREL_IO_BASE SLIT("ForeignObj") - [] [] [foreignObjDataCon] - where - foreignObjDataCon - = pcDataCon foreignObjDataConKey pREL_IO_BASE SLIT("ForeignObj") - [] [] [foreignObjPrimTy] foreignObjTyCon - -isForeignObjTy :: Type -> Bool -isForeignObjTy = isTyCon foreignObjTyConKey -\end{code} %************************************************************************ %* * @@ -321,107 +330,13 @@ isForeignObjTy = isTyCon foreignObjTyConKey integerTy :: Type integerTy = mkTyConTy integerTyCon -integerTyCon = pcNonRecDataTyCon integerTyConKey pREL_NUM SLIT("Integer") +integerTyCon = pcNonRecDataTyCon integerTyConName [] [] [smallIntegerDataCon, largeIntegerDataCon] -smallIntegerDataCon = pcDataCon smallIntegerDataConKey pREL_NUM SLIT("S#") +smallIntegerDataCon = pcDataCon smallIntegerDataConName [] [] [intPrimTy] integerTyCon -largeIntegerDataCon = pcDataCon largeIntegerDataConKey pREL_NUM SLIT("J#") +largeIntegerDataCon = pcDataCon largeIntegerDataConName [] [] [intPrimTy, byteArrayPrimTy] integerTyCon - - -isIntegerTy :: Type -> Bool -isIntegerTy = isTyCon integerTyConKey -\end{code} - - -%************************************************************************ -%* * -\subsection[TysWiredIn-ext-type]{External types} -%* * -%************************************************************************ - -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} -isFFIArgumentTy :: Bool -> Type -> Bool --- Checks for valid argument type for a 'foreign import' -isFFIArgumentTy is_safe ty = checkRepTyCon (legalOutgoingTyCon 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 - --- The result type of a foreign export dynamic must be either Addr, or --- a newtype of Addr. -isFFIDynResultTy = checkRepTyCon (== addrTyCon) - --- 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} - ----------------------------------------------- -These chaps do the work; they are not exported ----------------------------------------------- - -\begin{code} -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 :: 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 be_safe tc - | be_safe && getUnique tc `elem` [byteArrayTyConKey, mutableByteArrayTyConKey] - = False - | otherwise - = marshalableTyCon tc - -marshalableTyCon tc - = (opt_GlasgowExts && 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} @@ -476,14 +391,14 @@ primitive counterpart. \begin{code} boolTy = mkTyConTy boolTyCon -boolTyCon = pcTyCon EnumTyCon NonRecursive boolTyConKey - pREL_BASE SLIT("Bool") [] [] [falseDataCon, trueDataCon] +boolTyCon = pcTyCon EnumTyCon NonRecursive boolTyConName + [] [] [falseDataCon, trueDataCon] -falseDataCon = pcDataCon falseDataConKey pREL_BASE SLIT("False") [] [] [] boolTyCon -trueDataCon = pcDataCon trueDataConKey pREL_BASE SLIT("True") [] [] [] boolTyCon +falseDataCon = pcDataCon falseDataConName [] [] [] boolTyCon +trueDataCon = pcDataCon trueDataConName [] [] [] boolTyCon -falseDataConId = dataConId falseDataCon -trueDataConId = dataConId trueDataCon +falseDataConId = dataConWorkId falseDataCon +trueDataConId = dataConWorkId trueDataCon \end{code} %************************************************************************ @@ -505,14 +420,12 @@ data (,) a b = (,,) a b mkListTy :: Type -> Type mkListTy ty = mkTyConApp listTyCon [ty] -alphaListTy = mkSigmaTy alpha_tyvar [] (mkTyConApp listTyCon alpha_ty) - -listTyCon = pcRecDataTyCon listTyConKey pREL_BASE SLIT("[]") +listTyCon = pcRecDataTyCon listTyConName alpha_tyvar [(True,False)] [nilDataCon, consDataCon] -nilDataCon = pcDataCon nilDataConKey pREL_BASE SLIT("[]") alpha_tyvar [] [] listTyCon -consDataCon = pcDataCon consDataConKey pREL_BASE SLIT(":") - alpha_tyvar [] [alphaTy, mkTyConApp listTyCon alpha_ty] listTyCon +nilDataCon = pcDataCon nilDataConName alpha_tyvar [] [] listTyCon +consDataCon = pcDataCon consDataConName + alpha_tyvar [] [alphaTy, mkTyConApp listTyCon alpha_ty] listTyCon -- Interesting: polymorphic recursion would help here. -- We can't use (mkListTy alphaTy) in the defn of consDataCon, else mkListTy -- gets the over-specific type (Type -> Type) @@ -570,3 +483,131 @@ mkTupleTy boxity arity tys = mkTyConApp (tupleTyCon boxity arity) tys unitTy = mkTupleTy Boxed 0 [] \end{code} + +%************************************************************************ +%* * +\subsection[TysWiredIn-PArr]{The @[::]@ type} +%* * +%************************************************************************ + +Special syntax for parallel arrays needs some wired in definitions. + +\begin{code} +-- construct a type representing the application of the parallel array +-- constructor +-- +mkPArrTy :: Type -> Type +mkPArrTy ty = mkTyConApp parrTyCon [ty] + +-- represents the type constructor of parallel arrays +-- +-- * this must match the definition in `PrelPArr' +-- +-- NB: Although the constructor is given here, it will not be accessible in +-- user code as it is not in the environment of any compiled module except +-- `PrelPArr'. +-- +parrTyCon :: TyCon +parrTyCon = tycon + where + tycon = mkAlgTyCon + parrTyConName + kind + tyvars + [] -- No context + [(True, False)] + (DataCons [parrDataCon]) -- The constructor defined in `PrelPArr' + [] -- No record selectors + DataTyCon + NonRecursive + genInfo + tyvars = alpha_tyvar + mod = nameModule parrTyConName + kind = mkArrowKinds (map tyVarKind tyvars) liftedTypeKind + genInfo = mk_tc_gen_info mod (nameUnique parrTyConName) parrTyConName tycon + +parrDataCon :: DataCon +parrDataCon = pcDataCon + parrDataConName + alpha_tyvar -- forall'ed type variables + [] -- context + [intPrimTy, -- 1st argument: Int# + mkTyConApp -- 2nd argument: Array# a + arrayPrimTyCon + alpha_ty] + parrTyCon + +-- check whether a type constructor is the constructor for parallel arrays +-- +isPArrTyCon :: TyCon -> Bool +isPArrTyCon tc = tyConName tc == parrTyConName + +-- fake array constructors +-- +-- * these constructors are never really used to represent array values; +-- however, they are very convenient during desugaring (and, in particular, +-- in the pattern matching compiler) to treat array pattern just like +-- yet another constructor pattern +-- +parrFakeCon :: Arity -> DataCon +parrFakeCon i | i > mAX_TUPLE_SIZE = mkPArrFakeCon i -- build one specially +parrFakeCon i = parrFakeConArr!i + +-- pre-defined set of constructors +-- +parrFakeConArr :: Array Int DataCon +parrFakeConArr = array (0, mAX_TUPLE_SIZE) [(i, mkPArrFakeCon i) + | i <- [0..mAX_TUPLE_SIZE]] + +-- build a fake parallel array constructor for the given arity +-- +mkPArrFakeCon :: Int -> DataCon +mkPArrFakeCon arity = pcDataCon name [tyvar] [] tyvarTys parrTyCon + where + tyvar = head alphaTyVars + tyvarTys = replicate arity $ mkTyVarTy tyvar + nameStr = mkFastString ("MkPArr" ++ show arity) + name = mkWiredInName mod (mkOccFS dataName nameStr) uniq + uniq = mkPArrDataConUnique arity + mod = mkBasePkgModule pREL_PARR_Name + +-- checks whether a data constructor is a fake constructor for parallel arrays +-- +isPArrFakeCon :: DataCon -> Bool +isPArrFakeCon dcon = dcon == parrFakeCon (dataConSourceArity dcon) +\end{code} + +%************************************************************************ +%* * +\subsection{Wired In Type Constructors for Representation Types} +%* * +%************************************************************************ + +The following code defines the wired in datatypes cross, plus, unit +and c_of needed for the generic methods. + +Ok, so the basic story is that for each type constructor I need to +create 2 things - a TyCon and a DataCon and then we are basically +ok. There are going to be no arguments passed to these functions +because -well- there is nothing to pass to these functions. + +\begin{code} +crossTyCon :: TyCon +crossTyCon = pcNonRecDataTyCon crossTyConName alpha_beta_tyvars [] [crossDataCon] + +crossDataCon :: DataCon +crossDataCon = pcDataCon crossDataConName alpha_beta_tyvars [] [alphaTy, betaTy] crossTyCon + +plusTyCon :: TyCon +plusTyCon = pcNonRecDataTyCon plusTyConName alpha_beta_tyvars [] [inlDataCon, inrDataCon] + +inlDataCon, inrDataCon :: DataCon +inlDataCon = pcDataCon inlDataConName alpha_beta_tyvars [] [alphaTy] plusTyCon +inrDataCon = pcDataCon inrDataConName alpha_beta_tyvars [] [betaTy] plusTyCon + +genUnitTyCon :: TyCon -- The "1" type constructor for generics +genUnitTyCon = pcNonRecDataTyCon genUnitTyConName [] [] [genUnitDataCon] + +genUnitDataCon :: DataCon +genUnitDataCon = pcDataCon genUnitDataConName [] [] [] genUnitTyCon +\end{code}