%
-% (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}
consDataCon,
doubleDataCon,
doubleTy,
+ isDoubleTy,
doubleTyCon,
falseDataCon,
floatDataCon,
floatTy,
+ isFloatTy,
floatTyCon,
- getStatePairingConInfo,
intDataCon,
intTy,
isIntTy,
inIntRange,
+ int8TyCon,
+ int16TyCon,
+ int32TyCon,
+
+ int64TyCon,
+
integerTy,
integerTyCon,
integerDataCon,
isIntegerTy,
- liftDataCon,
- liftTyCon,
listTyCon,
- foreignObjTyCon,
- mkLiftTy,
mkListTy,
+ nilDataCon,
+
+ -- tuples
mkTupleTy,
tupleTyCon, tupleCon, unitTyCon, unitDataCon, pairTyCon, pairDataCon,
- nilDataCon,
- realWorldStateTy,
- return2GMPsTyCon,
- returnIntAndGMPTyCon,
-
- -- ST and STret types
- mkStateTy,
- mkStateTransformerTy,
- mkSTretTy,
- stTyCon,
- stDataCon,
- stRetDataCon,
- stRetTyCon,
-
- -- CCall result types
- stateAndAddrPrimTyCon,
- stateAndArrayPrimTyCon,
- stateAndByteArrayPrimTyCon,
- stateAndCharPrimTyCon,
- stateAndDoublePrimTyCon,
- stateAndFloatPrimTyCon,
- stateAndIntPrimTyCon,
- stateAndForeignObjPrimTyCon,
- stateAndMutableArrayPrimTyCon,
- stateAndMutableByteArrayPrimTyCon,
- stateAndPtrPrimTyCon,
- stateAndStablePtrPrimTyCon,
- stateAndSynchVarPrimTyCon,
- stateAndWordPrimTyCon,
+
+ -- unboxed tuples
+ mkUnboxedTupleTy,
+ unboxedTupleTyCon, unboxedTupleCon,
+ unboxedPairTyCon, unboxedPairDataCon,
+
stateDataCon,
stateTyCon,
+ realWorldStateTy,
stablePtrTyCon,
stringTy,
trueDataCon,
unitTy,
+ voidTy,
wordDataCon,
wordTy,
- wordTyCon
+ wordTyCon,
+
+ word8TyCon,
+ word16TyCon,
+ word32TyCon,
+ word64TyCon,
+
+ isFFIArgumentTy, -- :: Type -> Bool
+ isFFIResultTy, -- :: Type -> Bool
+ isFFIExternalTy, -- :: Type -> Bool
+ isAddrTy, -- :: Type -> Bool
+
) where
#include "HsVersions.h"
-import {-# SOURCE #-} MkId ( mkDataCon, mkTupleCon )
-import {-# SOURCE #-} Id ( Id, StrictnessMark(..) )
+import {-# SOURCE #-} MkId( mkDataConId )
-- friends:
import PrelMods
import TysPrim
-- others:
-import Kind ( mkBoxedTypeKind, mkArrowKind )
-import Name ( mkWiredInTyConName, mkWiredInIdName )
-import TyCon ( mkDataTyCon, mkTupleTyCon, mkSynTyCon,
- TyCon, Arity
- )
-import BasicTypes ( Module, NewOrData(..), RecFlag(..) )
+import Constants ( mAX_TUPLE_SIZE )
+import Name ( Module, varOcc, mkWiredInTyConName, mkWiredInIdName )
+import DataCon ( DataCon, mkDataCon )
+import Var ( TyVar, tyVarKind )
+import TyCon ( TyCon, mkAlgTyCon, mkSynTyCon, mkTupleTyCon )
+import BasicTypes ( Arity, NewOrData(..),
+ RecFlag(..), StrictnessMark(..) )
import Type ( Type, mkTyConTy, mkTyConApp, mkSigmaTy, mkTyVarTys,
- mkFunTy, mkFunTys, splitTyConApp_maybe, splitAlgTyConApp_maybe,
- GenType(..), ThetaType, TauType )
-import TyVar ( GenTyVar, TyVar, tyVarKind, alphaTyVars, alphaTyVar, betaTyVar )
-import Lex ( mkTupNameStr )
+ mkArrowKinds, boxedTypeKind, unboxedTypeKind,
+ mkFunTy, mkFunTys, isUnLiftedType,
+ splitTyConApp_maybe, splitAlgTyConApp_maybe,
+ ThetaType, TauType )
+import PrimRep ( PrimRep(..) )
import Unique
-import Util ( assoc, panic )
+import CmdLineOpts ( opt_GlasgowExts )
+import Util ( assoc )
+import Panic ( panic )
+import Array
alpha_tyvar = [alphaTyVar]
alpha_ty = [alphaTy]
pcRecDataTyCon, pcNonRecDataTyCon, pcNonRecNewTyCon
:: Unique{-TyConKey-} -> Module -> FAST_STRING
- -> [TyVar] -> [Id] -> TyCon
+ -> [TyVar] -> [DataCon] -> TyCon
-pcRecDataTyCon = pc_tycon DataType Recursive
-pcNonRecDataTyCon = pc_tycon DataType NonRecursive
-pcNonRecNewTyCon = pc_tycon NewType NonRecursive
+pcRecDataTyCon = pcTyCon DataType Recursive
+pcNonRecDataTyCon = pcTyCon DataType NonRecursive
+pcNonRecNewTyCon = pcTyCon NewType NonRecursive
-pc_tycon new_or_data is_rec key mod str tyvars cons
+pcTyCon new_or_data is_rec key mod str tyvars cons
= tycon
where
- tycon = mkDataTyCon name tycon_kind
+ tycon = mkAlgTyCon name kind
tyvars
[] -- No context
cons
is_rec
name = mkWiredInTyConName key mod str tycon
- tycon_kind = foldr (mkArrowKind . tyVarKind) mkBoxedTypeKind tyvars
+ kind = mkArrowKinds (map tyVarKind tyvars) boxedTypeKind
pcSynTyCon key mod str kind arity tyvars expansion
= tycon
name = mkWiredInTyConName key mod str tycon
pcDataCon :: Unique{-DataConKey-} -> Module -> FAST_STRING
- -> [TyVar] -> ThetaType -> [TauType] -> TyCon -> Id
+ -> [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
- name = mkWiredInIdName key mod str data_con
+ tyvars context [] [] arg_tys tycon id
+ name = mkWiredInIdName key mod (varOcc str) id
+ id = mkDataConId data_con
\end{code}
%************************************************************************
\begin{code}
tupleTyCon :: Arity -> TyCon
-tupleTyCon arity
- = tycon
- where
- tycon = mkTupleTyCon uniq name arity
- uniq = mkTupleTyConUnique arity
- name = mkWiredInTyConName uniq mod_name (mkTupNameStr arity) tycon
- mod_name | arity == 0 = pREL_BASE
- | otherwise = pREL_TUP
-
-tupleCon :: Arity -> Id
-tupleCon arity
- = tuple_con
+tupleTyCon i | i > mAX_TUPLE_SIZE = fst (mk_tuple i) -- Build one specially
+ | otherwise = tupleTyConArr!i
+
+tupleCon :: Arity -> DataCon
+tupleCon i | i > mAX_TUPLE_SIZE = snd (mk_tuple i) -- Build one specially
+ | otherwise = tupleConArr!i
+
+tupleTyCons :: [TyCon]
+tupleTyCons = elems tupleTyConArr
+
+tupleTyConArr :: Array Int TyCon
+tupleTyConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map fst tuples)
+
+tupleConArr :: Array Int DataCon
+tupleConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map snd tuples)
+
+tuples :: [(TyCon,DataCon)]
+tuples = [mk_tuple i | i <- [0..mAX_TUPLE_SIZE]]
+
+mk_tuple :: Int -> (TyCon,DataCon)
+mk_tuple arity = (tycon, tuple_con)
where
- tuple_con = mkTupleCon arity name ty
- uniq = mkTupleDataConUnique arity
- name = mkWiredInIdName uniq mod_name (mkTupNameStr arity) tuple_con
- mod_name | arity == 0 = pREL_BASE
- | otherwise = pREL_TUP
- ty = mkSigmaTy tyvars [] (mkFunTys tyvar_tys (mkTyConApp tycon tyvar_tys))
- tyvars = take arity alphaTyVars
- tyvar_tys = mkTyVarTys tyvars
- tycon = tupleTyCon arity
+ 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
pairDataCon = tupleCon 2
\end{code}
+%************************************************************************
+%* *
+\subsection[TysWiredIn-ubx-tuples]{Unboxed Tuple Types}
+%* *
+%************************************************************************
+
+\begin{code}
+unboxedTupleTyCon :: Arity -> TyCon
+unboxedTupleTyCon i | i > mAX_TUPLE_SIZE = fst (mk_unboxed_tuple i)
+ | otherwise = unboxedTupleTyConArr!i
+
+unboxedTupleCon :: Arity -> DataCon
+unboxedTupleCon i | i > mAX_TUPLE_SIZE = snd (mk_unboxed_tuple i)
+ | otherwise = unboxedTupleConArr!i
+
+unboxedTupleTyConArr :: Array Int TyCon
+unboxedTupleTyConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map fst ubx_tuples)
+
+unboxedTupleConArr :: Array Int DataCon
+unboxedTupleConArr = array (0,mAX_TUPLE_SIZE) ([0..] `zip` map snd ubx_tuples)
+
+ubx_tuples :: [(TyCon,DataCon)]
+ubx_tuples = [mk_unboxed_tuple i | i <- [0..mAX_TUPLE_SIZE]]
+
+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}
+-- 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.
+--
+-- 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 = pcNonRecDataTyCon charTyConKey pREL_BASE SLIT("Char") [] [charDataCon]
intTyCon = pcNonRecDataTyCon intTyConKey pREL_BASE SLIT("Int") [] [intDataCon]
intDataCon = pcDataCon intDataConKey pREL_BASE SLIT("I#") [] [] [intPrimTy] intTyCon
-isIntTy :: GenType flexi -> Bool
+isIntTy :: Type -> Bool
isIntTy ty
= case (splitAlgTyConApp_maybe ty) of
- Just (tycon, [], _) -> uniqueOf tycon == intTyConKey
+ Just (tycon, [], _) -> getUnique tycon == intTyConKey
_ -> False
inIntRange :: Integer -> Bool -- Tells if an integer lies in the legal range of Ints
max_int, min_int :: Integer
max_int = toInteger maxInt
min_int = toInteger minInt
+
+int8TyCon = pcNonRecDataTyCon int8TyConKey iNT SLIT("Int8") [] [int8DataCon]
+ where
+ int8DataCon = pcDataCon int8DataConKey iNT SLIT("I8#") [] [] [intPrimTy] int8TyCon
+
+int16TyCon = pcNonRecDataTyCon int16TyConKey iNT SLIT("Int16") [] [int16DataCon]
+ where
+ int16DataCon = pcDataCon int16DataConKey iNT SLIT("I16#") [] [] [intPrimTy] int16TyCon
+
+int32TyCon = pcNonRecDataTyCon int32TyConKey iNT SLIT("Int32") [] [int32DataCon]
+ where
+ int32DataCon = pcDataCon int32DataConKey iNT SLIT("I32#") [] [] [intPrimTy] int32TyCon
+
+int64TyCon = pcNonRecDataTyCon int64TyConKey pREL_ADDR SLIT("Int64") [] [int64DataCon]
+ where
+ int64DataCon = pcDataCon int64DataConKey pREL_ADDR SLIT("I64#") [] [] [int64PrimTy] int64TyCon
\end{code}
\begin{code}
+
wordTy = mkTyConTy wordTyCon
-wordTyCon = pcNonRecDataTyCon wordTyConKey pREL_FOREIGN SLIT("Word") [] [wordDataCon]
-wordDataCon = pcDataCon wordDataConKey pREL_FOREIGN SLIT("W#") [] [] [wordPrimTy] 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
+ word8DataCon = pcDataCon word8DataConKey wORD SLIT("W8#") [] [] [wordPrimTy] word8TyCon
+
+word16TyCon = pcNonRecDataTyCon word16TyConKey wORD SLIT("Word16") [] [word16DataCon]
+ where
+ word16DataCon = pcDataCon word16DataConKey wORD SLIT("W16#") [] [] [wordPrimTy] word16TyCon
+
+word32TyCon = pcNonRecDataTyCon word32TyConKey wORD SLIT("Word32") [] [word32DataCon]
+ where
+ word32DataCon = pcDataCon word32DataConKey wORD SLIT("W32#") [] [] [wordPrimTy] word32TyCon
+
+word64TyCon = pcNonRecDataTyCon word64TyConKey pREL_ADDR SLIT("Word64") [] [word64DataCon]
+ where
+ word64DataCon = pcDataCon word64DataConKey pREL_ADDR SLIT("W64#") [] [] [word64PrimTy] word64TyCon
\end{code}
\begin{code}
addrTyCon = pcNonRecDataTyCon addrTyConKey pREL_ADDR SLIT("Addr") [] [addrDataCon]
addrDataCon = pcDataCon addrDataConKey pREL_ADDR SLIT("A#") [] [] [addrPrimTy] addrTyCon
+
+isAddrTy :: Type -> Bool
+isAddrTy ty
+ = case (splitAlgTyConApp_maybe ty) of
+ Just (tycon, [], _) -> getUnique tycon == addrTyConKey
+ _ -> False
+
\end{code}
\begin{code}
floatTyCon = pcNonRecDataTyCon floatTyConKey pREL_BASE SLIT("Float") [] [floatDataCon]
floatDataCon = pcDataCon floatDataConKey pREL_BASE SLIT("F#") [] [] [floatPrimTy] floatTyCon
+
+isFloatTy :: Type -> Bool
+isFloatTy ty
+ = case (splitAlgTyConApp_maybe ty) of
+ Just (tycon, [], _) -> getUnique tycon == floatTyConKey
+ _ -> False
+
\end{code}
\begin{code}
doubleTy = mkTyConTy doubleTyCon
+isDoubleTy :: Type -> 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}
foreignObjTyCon
- = pcNonRecDataTyCon foreignObjTyConKey pREL_FOREIGN SLIT("ForeignObj")
+ = pcNonRecDataTyCon foreignObjTyConKey pREL_IO_BASE SLIT("ForeignObj")
[] [foreignObjDataCon]
where
foreignObjDataCon
- = pcDataCon foreignObjDataConKey pREL_FOREIGN SLIT("ForeignObj")
+ = pcDataCon foreignObjDataConKey pREL_IO_BASE SLIT("ForeignObj")
[] [] [foreignObjPrimTy] foreignObjTyCon
\end{code}
@Integer@ and its pals are not really primitive. @Integer@ itself, first:
\begin{code}
-integerTy :: GenType t
-integerTy = mkTyConTy integerTyCon
+integerTy :: Type
+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 :: Type -> Bool
isIntegerTy ty
= case (splitAlgTyConApp_maybe ty) of
- Just (tycon, [], _) -> uniqueOf tycon == integerTyConKey
+ Just (tycon, [], _) -> getUnique tycon == integerTyConKey
_ -> False
\end{code}
-And the other pairing types:
-\begin{code}
-return2GMPsTyCon = pcNonRecDataTyCon return2GMPsTyConKey
- pREL_NUM SLIT("Return2GMPs") [] [return2GMPsDataCon]
-
-return2GMPsDataCon
- = pcDataCon return2GMPsDataConKey pREL_NUM SLIT("Return2GMPs") [] []
- [intPrimTy, intPrimTy, byteArrayPrimTy,
- intPrimTy, intPrimTy, byteArrayPrimTy] return2GMPsTyCon
-
-returnIntAndGMPTyCon = pcNonRecDataTyCon returnIntAndGMPTyConKey
- pREL_NUM SLIT("ReturnIntAndGMP") [] [returnIntAndGMPDataCon]
-
-returnIntAndGMPDataCon
- = pcDataCon returnIntAndGMPDataConKey pREL_NUM SLIT("ReturnIntAndGMP") [] []
- [intPrimTy, intPrimTy, intPrimTy, byteArrayPrimTy] returnIntAndGMPTyCon
-\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<blah>#} 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
- = pcNonRecDataTyCon stateAndPtrPrimTyConKey pREL_ST SLIT("StateAndPtr#")
- alpha_beta_tyvars [stateAndPtrPrimDataCon]
-stateAndPtrPrimDataCon
- = pcDataCon stateAndPtrPrimDataConKey pREL_ST SLIT("StateAndPtr#")
- alpha_beta_tyvars [] [mkStatePrimTy alphaTy, betaTy]
- stateAndPtrPrimTyCon
-
-stateAndCharPrimTyCon
- = pcNonRecDataTyCon stateAndCharPrimTyConKey pREL_ST SLIT("StateAndChar#")
- alpha_tyvar [stateAndCharPrimDataCon]
-stateAndCharPrimDataCon
- = pcDataCon stateAndCharPrimDataConKey pREL_ST SLIT("StateAndChar#")
- alpha_tyvar [] [mkStatePrimTy alphaTy, charPrimTy]
- stateAndCharPrimTyCon
-
-stateAndIntPrimTyCon
- = pcNonRecDataTyCon stateAndIntPrimTyConKey pREL_ST SLIT("StateAndInt#")
- alpha_tyvar [stateAndIntPrimDataCon]
-stateAndIntPrimDataCon
- = pcDataCon stateAndIntPrimDataConKey pREL_ST SLIT("StateAndInt#")
- alpha_tyvar [] [mkStatePrimTy alphaTy, intPrimTy]
- stateAndIntPrimTyCon
-
-stateAndWordPrimTyCon
- = pcNonRecDataTyCon stateAndWordPrimTyConKey pREL_ST SLIT("StateAndWord#")
- alpha_tyvar [stateAndWordPrimDataCon]
-stateAndWordPrimDataCon
- = pcDataCon stateAndWordPrimDataConKey pREL_ST SLIT("StateAndWord#")
- alpha_tyvar [] [mkStatePrimTy alphaTy, wordPrimTy]
- stateAndWordPrimTyCon
-
-stateAndAddrPrimTyCon
- = pcNonRecDataTyCon stateAndAddrPrimTyConKey pREL_ST SLIT("StateAndAddr#")
- alpha_tyvar [stateAndAddrPrimDataCon]
-stateAndAddrPrimDataCon
- = pcDataCon stateAndAddrPrimDataConKey pREL_ST SLIT("StateAndAddr#")
- alpha_tyvar [] [mkStatePrimTy alphaTy, addrPrimTy]
- stateAndAddrPrimTyCon
-
-stateAndStablePtrPrimTyCon
- = pcNonRecDataTyCon stateAndStablePtrPrimTyConKey pREL_FOREIGN SLIT("StateAndStablePtr#")
- alpha_beta_tyvars [stateAndStablePtrPrimDataCon]
-stateAndStablePtrPrimDataCon
- = pcDataCon stateAndStablePtrPrimDataConKey pREL_FOREIGN SLIT("StateAndStablePtr#")
- alpha_beta_tyvars []
- [mkStatePrimTy alphaTy, mkTyConApp stablePtrPrimTyCon [betaTy]]
- stateAndStablePtrPrimTyCon
-
-stateAndForeignObjPrimTyCon
- = pcNonRecDataTyCon stateAndForeignObjPrimTyConKey pREL_FOREIGN SLIT("StateAndForeignObj#")
- alpha_tyvar [stateAndForeignObjPrimDataCon]
-stateAndForeignObjPrimDataCon
- = pcDataCon stateAndForeignObjPrimDataConKey pREL_FOREIGN SLIT("StateAndForeignObj#")
- alpha_tyvar []
- [mkStatePrimTy alphaTy, mkTyConTy foreignObjPrimTyCon]
- stateAndForeignObjPrimTyCon
-
-stateAndFloatPrimTyCon
- = pcNonRecDataTyCon stateAndFloatPrimTyConKey pREL_ST SLIT("StateAndFloat#")
- alpha_tyvar [stateAndFloatPrimDataCon]
-stateAndFloatPrimDataCon
- = pcDataCon stateAndFloatPrimDataConKey pREL_ST SLIT("StateAndFloat#")
- alpha_tyvar [] [mkStatePrimTy alphaTy, floatPrimTy]
- stateAndFloatPrimTyCon
-
-stateAndDoublePrimTyCon
- = pcNonRecDataTyCon stateAndDoublePrimTyConKey pREL_ST SLIT("StateAndDouble#")
- alpha_tyvar [stateAndDoublePrimDataCon]
-stateAndDoublePrimDataCon
- = pcDataCon stateAndDoublePrimDataConKey pREL_ST SLIT("StateAndDouble#")
- alpha_tyvar [] [mkStatePrimTy alphaTy, doublePrimTy]
- stateAndDoublePrimTyCon
-\end{code}
-
-\begin{code}
-stateAndArrayPrimTyCon
- = pcNonRecDataTyCon stateAndArrayPrimTyConKey pREL_ARR SLIT("StateAndArray#")
- alpha_beta_tyvars [stateAndArrayPrimDataCon]
-stateAndArrayPrimDataCon
- = pcDataCon stateAndArrayPrimDataConKey pREL_ARR SLIT("StateAndArray#")
- alpha_beta_tyvars [] [mkStatePrimTy alphaTy, mkArrayPrimTy betaTy]
- stateAndArrayPrimTyCon
-
-stateAndMutableArrayPrimTyCon
- = pcNonRecDataTyCon stateAndMutableArrayPrimTyConKey pREL_ARR SLIT("StateAndMutableArray#")
- alpha_beta_tyvars [stateAndMutableArrayPrimDataCon]
-stateAndMutableArrayPrimDataCon
- = pcDataCon stateAndMutableArrayPrimDataConKey pREL_ARR SLIT("StateAndMutableArray#")
- alpha_beta_tyvars [] [mkStatePrimTy alphaTy, mkMutableArrayPrimTy alphaTy betaTy]
- stateAndMutableArrayPrimTyCon
-
-stateAndByteArrayPrimTyCon
- = pcNonRecDataTyCon stateAndByteArrayPrimTyConKey pREL_ARR SLIT("StateAndByteArray#")
- alpha_tyvar [stateAndByteArrayPrimDataCon]
-stateAndByteArrayPrimDataCon
- = pcDataCon stateAndByteArrayPrimDataConKey pREL_ARR SLIT("StateAndByteArray#")
- alpha_tyvar [] [mkStatePrimTy alphaTy, byteArrayPrimTy]
- stateAndByteArrayPrimTyCon
-
-stateAndMutableByteArrayPrimTyCon
- = pcNonRecDataTyCon stateAndMutableByteArrayPrimTyConKey pREL_ARR SLIT("StateAndMutableByteArray#")
- alpha_tyvar [stateAndMutableByteArrayPrimDataCon]
-stateAndMutableByteArrayPrimDataCon
- = pcDataCon stateAndMutableByteArrayPrimDataConKey pREL_ARR SLIT("StateAndMutableByteArray#")
- alpha_tyvar [] [mkStatePrimTy alphaTy, mkTyConApp mutableByteArrayPrimTyCon alpha_ty]
- stateAndMutableByteArrayPrimTyCon
-
-stateAndSynchVarPrimTyCon
- = pcNonRecDataTyCon stateAndSynchVarPrimTyConKey pREL_CONC SLIT("StateAndSynchVar#")
- alpha_beta_tyvars [stateAndSynchVarPrimDataCon]
-stateAndSynchVarPrimDataCon
- = pcDataCon stateAndSynchVarPrimDataConKey pREL_CONC SLIT("StateAndSynchVar#")
- alpha_beta_tyvars [] [mkStatePrimTy alphaTy, mkSynchVarPrimTy alphaTy betaTy]
- stateAndSynchVarPrimTyCon
-\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 (splitTyConApp_maybe prim_ty) of
- Nothing -> panic "getStatePairingConInfo:1"
- Just (prim_tycon, tys_applied) ->
+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
- (pair_con, pair_tycon, num_tys) = assoc "getStatePairingConInfo" tbl prim_tycon
- pair_ty = mkTyConApp pair_tycon (realWorldTy : drop num_tys tys_applied)
+ u_tycon = getUnique tycon
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)),
- (foreignObjPrimTyCon, (stateAndForeignObjPrimDataCon, stateAndForeignObjPrimTyCon, 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}
-%* *
-%************************************************************************
-
-The only reason this is wired in is because we have to represent the
-type of runST.
-
-\begin{code}
-mkStateTransformerTy s a = mkTyConApp stTyCon [s, a]
-
-stTyCon = pcNonRecNewTyCon stTyConKey pREL_ST SLIT("ST") alpha_beta_tyvars [stDataCon]
-
-stDataCon = pcDataCon stDataConKey pREL_ST SLIT("ST")
- alpha_beta_tyvars [] [ty] stTyCon
- where
- ty = mkFunTy (mkStatePrimTy alphaTy) (mkSTretTy alphaTy betaTy)
-
-mkSTretTy alpha beta = mkTyConApp stRetTyCon [alpha,beta]
-
-stRetTyCon
- = pcNonRecDataTyCon stRetTyConKey pREL_ST SLIT("STret")
- alpha_beta_tyvars [stRetDataCon]
-stRetDataCon
- = pcDataCon stRetDataConKey pREL_ST SLIT("STret")
- alpha_beta_tyvars [] [mkStatePrimTy alphaTy, betaTy]
- stRetTyCon
+ (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}
%************************************************************************
\begin{code}
boolTy = mkTyConTy boolTyCon
-boolTyCon = pcNonRecDataTyCon boolTyConKey pREL_BASE SLIT("Bool") [] [falseDataCon, trueDataCon]
+boolTyCon = pcTyCon EnumType NonRecursive boolTyConKey
+ pREL_BASE SLIT("Bool") [] [falseDataCon, trueDataCon]
falseDataCon = pcDataCon falseDataConKey pREL_BASE SLIT("False") [] [] [] boolTyCon
trueDataCon = pcDataCon trueDataConKey pREL_BASE SLIT("True") [] [] [] boolTyCon
\end{verbatim}
\begin{code}
-mkListTy :: GenType t -> GenType t
+mkListTy :: Type -> Type
mkListTy ty = mkTyConApp listTyCon [ty]
alphaListTy = mkSigmaTy alpha_tyvar [] (mkTyConApp listTyCon alpha_ty)
\end{itemize}
\begin{code}
-mkTupleTy :: Int -> [GenType t] -> GenType t
-
+mkTupleTy :: Int -> [Type] -> Type
mkTupleTy arity tys = mkTyConApp (tupleTyCon arity) tys
-unitTy = mkTupleTy 0 []
-\end{code}
-
-%************************************************************************
-%* *
-\subsection[TysWiredIn-_Lift]{@_Lift@ type: to support array indexing}
-%* *
-%************************************************************************
-
-Again, deeply turgid: \tr{data _Lift a = _Lift a}.
-
-\begin{code}
-mkLiftTy ty = mkTyConApp liftTyCon [ty]
-
-{-
-mkLiftTy ty
- = mkSigmaTy tvs theta (mkTyConApp liftTyCon [tau])
- where
- (tvs, theta, tau) = splitSigmaTy ty
-
-isLiftTy ty
- = case (splitAlgTyConApp_maybeExpandingDicts tau) of
- Just (tycon, tys, _) -> tycon == liftTyCon
- Nothing -> False
- where
- (tvs, theta, tau) = splitSigmaTy ty
--}
-
-
-alphaLiftTy = mkSigmaTy alpha_tyvar [] (mkTyConApp liftTyCon alpha_ty)
+mkUnboxedTupleTy :: Int -> [Type] -> Type
+mkUnboxedTupleTy arity tys = mkTyConApp (unboxedTupleTyCon arity) tys
-liftTyCon
- = pcNonRecDataTyCon liftTyConKey pREL_BASE SLIT("Lift") alpha_tyvar [liftDataCon]
-
-liftDataCon
- = pcDataCon liftDataConKey pREL_BASE SLIT("Lift")
- alpha_tyvar [] alpha_ty liftTyCon
- where
- bottom = panic "liftDataCon:State# _RealWorld"
+unitTy = mkTupleTy 0 []
\end{code}
projects / ghc-hetmet.git / blobdiff