consDataCon,
doubleDataCon,
doubleTy,
- isDoubleTy,
doubleTyCon,
falseDataCon, falseDataConId,
floatDataCon,
floatTy,
- isFloatTy,
floatTyCon,
intDataCon,
intTy,
intTyCon,
- isIntTy,
integerTy,
integerTyCon,
smallIntegerDataCon,
largeIntegerDataCon,
- isIntegerTy,
listTyCon,
wordTy,
wordTyCon,
- isFFIArgumentTy, -- :: DynFlags -> Bool -> Type -> Bool
- isFFIImportResultTy, -- :: DynFlags -> Type -> Bool
- isFFIExportResultTy, -- :: Type -> Bool
- isFFIExternalTy, -- :: Type -> Bool
- isFFIDynArgumentTy, -- :: Type -> Bool
- isFFIDynResultTy, -- :: Type -> Bool
- isFFILabelTy, -- :: Type -> Bool
- isAddrTy, -- :: Type -> Bool
- isForeignPtrTy -- :: Type -> Bool
-
+ -- parallel arrays
+ mkPArrTy,
+ parrTyCon, parrFakeCon, isPArrTyCon, isPArrFakeCon
) where
#include "HsVersions.h"
nameModule, mkWiredInName )
import OccName ( mkOccFS, tcName, dataName, mkWorkerOcc, mkGenOcc1, mkGenOcc2 )
import RdrName ( rdrNameOcc )
-import DataCon ( DataCon, StrictnessMark(..), mkDataCon, dataConId )
+import DataCon ( DataCon, mkDataCon, dataConId, dataConSourceArity )
import Var ( TyVar, tyVarKind )
-import TyCon ( TyCon, AlgTyConFlavour(..), tyConDataCons,
- mkTupleTyCon, isUnLiftedTyCon, mkAlgTyCon
+import TyCon ( TyCon, AlgTyConFlavour(..), DataConDetails(..), tyConDataCons,
+ mkTupleTyCon, mkAlgTyCon, tyConName
)
-import BasicTypes ( Arity, RecFlag(..), Boxity(..), isBoxed )
+import BasicTypes ( Arity, RecFlag(..), Boxity(..), isBoxed, StrictnessMark(..) )
-import Type ( Type, mkTyConTy, mkTyConApp, mkTyVarTys,
+import Type ( Type, mkTyConTy, mkTyConApp, mkTyVarTy, mkTyVarTys,
mkArrowKinds, liftedTypeKind, unliftedTypeKind,
- splitTyConApp_maybe, repType,
- TauType, ThetaType )
-import Unique ( incrUnique, mkTupleTyConUnique, mkTupleDataConUnique )
+ ThetaType )
+import Unique ( incrUnique, mkTupleTyConUnique,
+ mkTupleDataConUnique, mkPArrDataConUnique )
import PrelNames
-import CmdLineOpts
import Array
alpha_tyvar = [alphaTyVar]
, intTyCon
, integerTyCon
, listTyCon
+ , parrTyCon
, wordTyCon
]
genericTyCons = [ plusTyCon, crossTyCon, genUnitTyCon ]
-tuple_tycons = unitTyCon : [tupleTyCon Boxed i | i <- [2..37] ]
-unboxed_tuple_tycons = [tupleTyCon Unboxed i | i <- [1..37] ]
+tuple_tycons = unitTyCon : [tupleTyCon Boxed i | i <- [2..mAX_TUPLE_SIZE] ]
+unboxed_tuple_tycons = [tupleTyCon Unboxed i | i <- [1..mAX_TUPLE_SIZE] ]
\end{code}
tyvars
[] -- No context
argvrcs
- cons
- (length cons)
+ (DataCons cons)
[] -- No record selectors
new_or_data
is_rec
name1 = mkWiredInName mod occ_name1 fn1_key
name2 = mkWiredInName mod occ_name2 fn2_key
-pcDataCon :: Name -> [TyVar] -> ThetaType -> [TauType] -> TyCon -> DataCon
+pcDataCon :: Name -> [TyVar] -> ThetaType -> [Type] -> 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.
intTyCon = pcNonRecDataTyCon intTyConName [] [] [intDataCon]
intDataCon = pcDataCon intDataConName [] [] [intPrimTy] intTyCon
-
-isIntTy :: Type -> Bool
-isIntTy = isTyCon intTyConKey
\end{code}
\begin{code}
-
wordTy = mkTyConTy wordTyCon
wordTyCon = pcNonRecDataTyCon wordTyConName [] [] [wordDataCon]
addrTyCon = pcNonRecDataTyCon addrTyConName [] [] [addrDataCon]
addrDataCon = pcDataCon addrDataConName [] [] [addrPrimTy] addrTyCon
-
-isAddrTy :: Type -> Bool
-isAddrTy = isTyCon addrTyConKey
\end{code}
\begin{code}
floatTyCon = pcNonRecDataTyCon floatTyConName [] [] [floatDataCon]
floatDataCon = pcDataCon floatDataConName [] [] [floatPrimTy] floatTyCon
-
-isFloatTy :: Type -> Bool
-isFloatTy = isTyCon floatTyConKey
\end{code}
\begin{code}
doubleTy = mkTyConTy doubleTyCon
-isDoubleTy :: Type -> Bool
-isDoubleTy = isTyCon doubleTyConKey
-
doubleTyCon = pcNonRecDataTyCon doubleTyConName [] [] [doubleDataCon]
doubleDataCon = pcDataCon doubleDataConName [] [] [doublePrimTy] doubleTyCon
\end{code}
foreignObjDataCon
= pcDataCon foreignObjDataConName
[] [] [foreignObjPrimTy] foreignObjTyCon
-
-isForeignObjTy :: Type -> Bool
-isForeignObjTy = isTyCon foreignObjTyConKey
\end{code}
\begin{code}
foreignPtrDataCon
= pcDataCon foreignPtrDataConName
alpha_tyvar [] [foreignObjPrimTy] foreignPtrTyCon
-
-isForeignPtrTy :: Type -> Bool
-isForeignPtrTy = isTyCon foreignPtrTyConKey
\end{code}
%************************************************************************
[] [] [intPrimTy] integerTyCon
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 :: DynFlags -> Bool -> Type -> Bool
--- Checks for valid argument type for a 'foreign import'
-isFFIArgumentTy dflags is_safe ty
- = checkRepTyCon (legalOutgoingTyCon dflags is_safe) ty
-
-isFFIExternalTy :: Type -> Bool
--- Types that are allowed as arguments of a 'foreign export'
-isFFIExternalTy ty = checkRepTyCon 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 = 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}
-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 -> Bool -> TyCon -> Bool
--- Checks validity of types going from Haskell -> external world
--- The boolean is true for a 'safe' call (when we don't want to
--- pass Haskell pointers to the world)
-legalOutgoingTyCon dflags be_safe tc
- | be_safe && getUnique tc `elem` [byteArrayTyConKey, mutableByteArrayTyConKey]
- = False
- | otherwise
- = marshalableTyCon dflags tc
-
-marshalableTyCon dflags tc
- = (dopt 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}
\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 = _PK_ ("MkPArr" ++ show arity)
+ name = mkWiredInName mod (mkOccFS dataName nameStr) uniq
+ uniq = mkPArrDataConUnique arity
+ mod = mkPrelModule 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}
%* *
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