-isDoubleTy :: Type -> Bool
-isDoubleTy = isTyCon doubleTyConKey
-
-doubleTyCon = pcNonRecDataTyCon doubleTyConName [] [] [doubleDataCon]
-doubleDataCon = pcDataCon doubleDataConName [] [] [doublePrimTy] doubleTyCon
-\end{code}
-
-\begin{code}
-stablePtrTyCon
- = pcNonRecDataTyCon stablePtrTyConName
- alpha_tyvar [(True,False)] [stablePtrDataCon]
- where
- stablePtrDataCon
- = pcDataCon stablePtrDataConName
- alpha_tyvar [] [mkStablePtrPrimTy alphaTy] stablePtrTyCon
-\end{code}
-
-\begin{code}
-foreignObjTyCon
- = pcNonRecDataTyCon foreignObjTyConName
- [] [] [foreignObjDataCon]
- where
- foreignObjDataCon
- = pcDataCon foreignObjDataConName
- [] [] [foreignObjPrimTy] foreignObjTyCon
-
-isForeignObjTy :: Type -> Bool
-isForeignObjTy = isTyCon foreignObjTyConKey
-\end{code}
-
-\begin{code}
-foreignPtrTyCon
- = pcNonRecDataTyCon foreignPtrTyConName
- alpha_tyvar [(True,False)] [foreignPtrDataCon]
- where
- foreignPtrDataCon
- = pcDataCon foreignPtrDataConName
- alpha_tyvar [] [foreignObjPrimTy] foreignPtrTyCon
-
-isForeignPtrTy :: Type -> Bool
-isForeignPtrTy = isTyCon foreignPtrTyConKey
-\end{code}
-
-%************************************************************************
-%* *
-\subsection[TysWiredIn-Integer]{@Integer@ and its related ``pairing'' types}
-%* *
-%************************************************************************
-
-@Integer@ and its pals are not really primitive. @Integer@ itself, first:
-\begin{code}
-integerTy :: Type
-integerTy = mkTyConTy integerTyCon
-
-integerTyCon = pcNonRecDataTyCon integerTyConName
- [] [] [smallIntegerDataCon, largeIntegerDataCon]
-
-smallIntegerDataCon = pcDataCon smallIntegerDataConName
- [] [] [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
- ]