import TysPrim
import Type ( Type, ThetaType, TauType, ClassContext,
mkForAllTys, mkFunTys, mkTyConApp,
- mkTyVarTys, mkDictTy,
+ mkTyVarTys, mkDictTys,
splitAlgTyConApp_maybe, classesToPreds
)
import TyCon ( TyCon, tyConDataCons, isDataTyCon, isProductTyCon,
(real_arg_stricts, strict_arg_tyss)
= unzip (zipWith (unbox_strict_arg_ty tycon) arg_stricts orig_arg_tys)
- rep_arg_tys = [mkDictTy cls tys | (cls,tys) <- ex_theta] ++ concat strict_arg_tyss
+ rep_arg_tys = mkDictTys ex_theta ++ concat strict_arg_tyss
ex_dict_stricts = map mk_dict_strict_mark ex_theta
-- Add a strictness flag for the existential dictionary arguments
import PrelMods ( pREL_ERR, pREL_GHC )
import PrelRules ( primOpRule )
import Rules ( addRule )
-import Type ( Type, ClassContext, mkDictTy, mkTyConApp, mkTyVarTys,
+import Type ( Type, ClassContext, mkDictTy, mkDictTys, mkTyConApp, mkTyVarTys,
mkFunTys, mkFunTy, mkSigmaTy, classesToPreds,
isUnLiftedType, mkForAllTys, mkTyVarTy, tyVarsOfType, tyVarsOfTypes,
splitSigmaTy, splitFunTy_maybe,
(tyvars, theta, ex_tyvars, ex_theta, orig_arg_tys, tycon) = dataConSig data_con
all_tyvars = tyvars ++ ex_tyvars
- dict_tys = [mkDictTy clas tys | (clas,tys) <- theta]
- ex_dict_tys = [mkDictTy clas tys | (clas,tys) <- ex_theta]
+ dict_tys = mkDictTys theta
+ ex_dict_tys = mkDictTys ex_theta
all_arg_tys = dict_tys ++ ex_dict_tys ++ orig_arg_tys
result_ty = mkTyConApp tycon (mkTyVarTys tyvars)
recConErrorIdKey,
recSelErrIdKey,
recUpdErrorIdKey,
+ returnIOIdKey,
returnMClassOpKey,
runSTRepIdKey,
showClassKey,
filterIdKey = mkPreludeMiscIdUnique 34
zipIdKey = mkPreludeMiscIdUnique 35
bindIOIdKey = mkPreludeMiscIdUnique 36
-deRefStablePtrIdKey = mkPreludeMiscIdUnique 37
-makeStablePtrIdKey = mkPreludeMiscIdUnique 38
-getTagIdKey = mkPreludeMiscIdUnique 39
+returnIOIdKey = mkPreludeMiscIdUnique 37
+deRefStablePtrIdKey = mkPreludeMiscIdUnique 38
+makeStablePtrIdKey = mkPreludeMiscIdUnique 39
+getTagIdKey = mkPreludeMiscIdUnique 40
\end{code}
Certain class operations from Prelude classes. They get their own
import HsDecls ( extNameStatic )
import CallConv
import TcHsSyn ( TypecheckedForeignDecl )
-import CoreUtils ( exprType, mkInlineMe, bindNonRec )
+import CoreUtils ( exprType, mkInlineMe )
import DataCon ( DataCon, dataConWrapId )
import Id ( Id, idType, idName, mkWildId, mkVanillaId )
import MkId ( mkWorkerId )
mkForeignExportOcc, isLocalName,
NamedThing(..), Provenance(..), ExportFlag(..)
)
-import PrelInfo ( deRefStablePtr_NAME, bindIO_NAME, makeStablePtr_NAME )
+import PrelInfo ( deRefStablePtr_NAME, returnIO_NAME, bindIO_NAME, makeStablePtr_NAME )
import Type ( unUsgTy,
splitTyConApp_maybe, splitFunTys, splitForAllTys,
Type, mkFunTys, mkForAllTys, mkTyConApp,
- mkTyVarTy, mkFunTy, splitAppTy
+ mkTyVarTy, mkFunTy, splitAppTy, applyTy, funResultTy
)
import PrimOp ( PrimOp(..), CCall(..), CCallTarget(..) )
import Var ( TyVar )
import TysPrim ( realWorldStatePrimTy, addrPrimTy )
-import TysWiredIn ( unitTyCon, addrTy, stablePtrTyCon,
+import TysWiredIn ( unitTy, addrTy, stablePtrTyCon,
unboxedTupleCon, addrDataCon
)
import Unique
, SDoc
, SDoc
)
-dsFExport i ty mod_name ext_name cconv isDyn =
- getUniqueDs `thenDs` \ uniq ->
- getSrcLocDs `thenDs` \ src_loc ->
- let
- f_helper_glob = mkVanillaId helper_name helper_ty
- where
- name = idName i
- mod
- | isLocalName name = mod_name
- | otherwise = nameModule name
-
- occ = mkForeignExportOcc (nameOccName name)
- prov = LocalDef src_loc Exported
- helper_name = mkGlobalName uniq mod occ prov
- in
- newSysLocalsDs fe_arg_tys `thenDs` \ fe_args ->
+dsFExport i ty mod_name ext_name cconv isDyn
+ = -- BUILD THE returnIO WRAPPER, if necessary
+ -- Look at the result type of the exported function, orig_res_ty
+ -- If it's IO t, return (\x.x, IO t, t)
+ -- If it's plain t, return (\x.returnIO x, IO t, t)
+ (case splitTyConApp_maybe orig_res_ty of
+ Just (ioTyCon, [res_ty])
+ -> ASSERT( getUnique ioTyCon == ioTyConKey )
+ -- The function already returns IO t
+ returnDs (\body -> body, orig_res_ty, res_ty)
+
+ other -> -- The function returns t, so wrap the call in returnIO
+ dsLookupGlobalValue returnIO_NAME `thenDs` \ retIOId ->
+ returnDs (\body -> mkApps (Var retIOId) [Type orig_res_ty, body],
+ funResultTy (applyTy (idType retIOId) orig_res_ty),
+ -- We don't have ioTyCon conveniently to hand
+ orig_res_ty)
+
+ ) `thenDs` \ (return_io_wrapper, -- Either identity or returnIO
+ io_res_ty, -- IO t
+ res_ty) -> -- t
+
+
+ -- BUILD THE deRefStablePtr WRAPPER, if necessary
(if isDyn then
newSysLocalDs stbl_ptr_ty `thenDs` \ stbl_ptr ->
newSysLocalDs stbl_ptr_to_ty `thenDs` \ stbl_value ->
the_deref_app = mkApps (Var deRefStablePtrId)
[ Type stbl_ptr_to_ty, Var stbl_ptr ]
in
- newSysLocalDs (exprType the_deref_app) `thenDs` \ x_deref_app ->
dsLookupGlobalValue bindIO_NAME `thenDs` \ bindIOId ->
- newSysLocalDs (mkFunTy stbl_ptr_to_ty
- (mkTyConApp ioTyCon [res_ty])) `thenDs` \ x_cont ->
let
- stbl_app = \ cont ->
- bindNonRec x_cont (mkLams [stbl_value] cont) $
- bindNonRec x_deref_app the_deref_app
- (mkApps (Var bindIOId)
- [ Type stbl_ptr_to_ty
- , Type res_ty
- , Var x_deref_app
- , Var x_cont])
+ stbl_app cont = mkApps (Var bindIOId)
+ [ Type stbl_ptr_to_ty
+ , Type res_ty
+ , the_deref_app
+ , mkLams [stbl_value] cont]
in
returnDs (stbl_value, stbl_app, stbl_ptr)
else
\ body -> body,
panic "stbl_ptr" -- should never be touched.
)) `thenDs` \ (i, getFun_wrapper, stbl_ptr) ->
- let
- wrapper_args
- | isDyn = stbl_ptr:fe_args
- | otherwise = fe_args
- wrapper_arg_tys
- | isDyn = stbl_ptr_ty:helper_arg_tys
- | otherwise = helper_arg_tys
- the_app =
- getFun_wrapper $
- mkApps (Var i) (map (Type . mkTyVarTy) tvs ++ map Var fe_args)
- in
+ -- BUILD THE HELPER
getModuleDs `thenDs` \ mod ->
getUniqueDs `thenDs` \ uniq ->
+ getSrcLocDs `thenDs` \ src_loc ->
+ newSysLocalsDs fe_arg_tys `thenDs` \ fe_args ->
let
- the_body = mkLams (tvs ++ wrapper_args) the_app
- c_nm = extNameStatic ext_name
+ wrapper_args | isDyn = stbl_ptr:fe_args
+ | otherwise = fe_args
- (h_stub, c_stub) = fexportEntry (moduleUserString mod)
+ wrapper_arg_tys | isDyn = stbl_ptr_ty:fe_arg_tys
+ | otherwise = fe_arg_tys
+
+ helper_ty = mkForAllTys tvs $
+ mkFunTys wrapper_arg_tys io_res_ty
+
+ f_helper_glob = mkVanillaId helper_name helper_ty
+ where
+ name = idName i
+ mod
+ | isLocalName name = mod_name
+ | otherwise = nameModule name
+
+ occ = mkForeignExportOcc (nameOccName name)
+ prov = LocalDef src_loc Exported
+ helper_name = mkGlobalName uniq mod occ prov
+
+ the_app = getFun_wrapper (return_io_wrapper (mkVarApps (Var i) (tvs ++ fe_args)))
+ the_body = mkLams (tvs ++ wrapper_args) the_app
+ c_nm = extNameStatic ext_name
+
+ (h_stub, c_stub) = fexportEntry (moduleUserString mod)
c_nm f_helper_glob
- wrapper_arg_tys the_result_ty cconv isDyn
+ wrapper_arg_tys res_ty cconv isDyn
in
returnDs (NonRec f_helper_glob the_body, h_stub, c_stub)
where
-
(tvs,sans_foralls) = splitForAllTys ty
- (fe_arg_tys', io_res) = splitFunTys sans_foralls
-
-
- Just (ioTyCon, [res_ty]) = splitTyConApp_maybe io_res
+ (fe_arg_tys', orig_res_ty) = splitFunTys sans_foralls
(_, stbl_ptr_ty') = splitForAllTys stbl_ptr_ty
(_, stbl_ptr_to_ty) = splitAppTy stbl_ptr_ty'
- fe_arg_tys
- | isDyn = tail fe_arg_tys'
- | otherwise = fe_arg_tys'
-
- (stbl_ptr_ty, helper_arg_tys) =
- case fe_arg_tys' of
- (x:xs) | isDyn -> (x,xs)
- ls -> (error "stbl_ptr_ty", ls)
-
- helper_ty =
- mkForAllTys tvs $
- mkFunTys arg_tys io_res
- where
- arg_tys
- | isDyn = stbl_ptr_ty : helper_arg_tys
- | otherwise = helper_arg_tys
-
- the_result_ty =
- case splitTyConApp_maybe io_res of
- Just (_,[res_ty]) ->
- case splitTyConApp_maybe res_ty of
- Just (tc,_) | getUnique tc /= getUnique unitTyCon -> Just res_ty
- _ -> Nothing
- _ -> Nothing
-
+ fe_arg_tys | isDyn = tail fe_arg_tys'
+ | otherwise = fe_arg_tys'
+
+ stbl_ptr_ty | isDyn = head fe_arg_tys'
+ | otherwise = error "stbl_ptr_ty"
\end{code}
@foreign export dynamic@ lets you dress up Haskell IO actions
in
dsFExport i export_ty mod_name fe_ext_name cconv True
`thenDs` \ (fe@(NonRec fe_helper fe_expr), h_code, c_code) ->
- newSysLocalDs arg_ty `thenDs` \ cback ->
- dsLookupGlobalValue makeStablePtr_NAME `thenDs` \ makeStablePtrId ->
+ newSysLocalDs arg_ty `thenDs` \ cback ->
+ dsLookupGlobalValue makeStablePtr_NAME `thenDs` \ makeStablePtrId ->
let
mk_stbl_ptr_app = mkApps (Var makeStablePtrId) [ Type arg_ty, Var cback ]
- mk_stbl_ptr_app_ty = exprType mk_stbl_ptr_app
in
- newSysLocalDs mk_stbl_ptr_app_ty `thenDs` \ x_mk_stbl_ptr_app ->
dsLookupGlobalValue bindIO_NAME `thenDs` \ bindIOId ->
newSysLocalDs (mkTyConApp stablePtrTyCon [arg_ty]) `thenDs` \ stbl_value ->
let
- stbl_app = \ x_cont cont ret_ty ->
- bindNonRec x_cont cont $
- bindNonRec x_mk_stbl_ptr_app mk_stbl_ptr_app $
- (mkApps (Var bindIOId)
- [ Type (mkTyConApp stablePtrTyCon [arg_ty])
- , Type ret_ty
- , Var x_mk_stbl_ptr_app
- , Var x_cont
- ])
+ stbl_app cont ret_ty
+ = mkApps (Var bindIOId)
+ [ Type (mkTyConApp stablePtrTyCon [arg_ty])
+ , Type ret_ty
+ , mk_stbl_ptr_app
+ , cont
+ ]
{-
The arguments to the external function which will
-- (probably in the RTS.)
adjustor = SLIT("createAdjustor")
in
- dsCCall adjustor adj_args False False addrTy `thenDs` \ ccall_adj ->
+ dsCCall adjustor adj_args False False ioAddrTy `thenDs` \ ccall_adj ->
let ccall_adj_ty = exprType ccall_adj
+ ccall_io_adj = mkLams [stbl_value] $
+ Note (Coerce io_res_ty (unUsgTy ccall_adj_ty))
+ ccall_adj
in
- newSysLocalDs ccall_adj_ty `thenDs` \ x_ccall_adj ->
- let ccall_io_adj =
- mkLams [stbl_value] $
- bindNonRec x_ccall_adj ccall_adj $
- Note (Coerce (mkTyConApp ioTyCon [res_ty]) (unUsgTy ccall_adj_ty))
- (Var x_ccall_adj)
- in
- newSysLocalDs (exprType ccall_io_adj) `thenDs` \ x_ccall_io_adj ->
let io_app = mkLams tvs $
mkLams [cback] $
- stbl_app x_ccall_io_adj ccall_io_adj addrTy
+ stbl_app ccall_io_adj addrTy
in
returnDs (NonRec i io_app, fe, h_code, c_code)
where
(tvs,sans_foralls) = splitForAllTys ty
- ([arg_ty], io_res) = splitFunTys sans_foralls
+ ([arg_ty], io_res_ty) = splitFunTys sans_foralls
- Just (ioTyCon, [res_ty]) = splitTyConApp_maybe io_res
+ Just (ioTyCon, [res_ty]) = splitTyConApp_maybe io_res_ty
export_ty = mkFunTy (mkTyConApp stablePtrTyCon [arg_ty]) arg_ty
+ ioAddrTy :: Type -- IO Addr
+ ioAddrTy = mkTyConApp ioTyCon [addrTy]
+
toCName :: Id -> String
toCName i = showSDoc (pprCode CStyle (ppr (idName i)))
-
\end{code}
%*
-> FAST_STRING
-> Id
-> [Type]
- -> Maybe Type
+ -> Type
-> CallConv
-> Bool
-> (SDoc, SDoc)
-fexportEntry mod_nm c_nm helper args res cc isDyn = (header_bits, c_bits)
+fexportEntry mod_nm c_nm helper args res_ty cc isDyn = (header_bits, c_bits)
where
-- name of the (Haskell) helper function generated by the desugarer.
h_nm = ppr helper <> text "_closure"
-- create the application + perform it.
, text "rc=rts_evalIO" <>
parens (foldl appArg (text "(StgClosure*)&" <> h_nm) (zip args c_args) <> comma <> text "&ret") <> semi
- , returnResult
+ , text "rts_checkSchedStatus" <> parens (doubleQuotes (text mod_nm <> char '.' <> ptext c_nm)
+ <> comma <> text "rc") <> semi
+ , text "return" <> return_what <> semi
, rbrace
]
cParamTypes = map showStgType real_args
- cResType =
- case res of
- Nothing -> text "void"
- Just t -> showStgType t
+ res_ty_is_unit = res_ty == unitTy
+
+ cResType | res_ty_is_unit = text "void"
+ | otherwise = showStgType res_ty
pprCconv
| cc == cCallConv = empty
mkExtern ty nm = text "extern" <+> ty <+> nm <> semi
- returnResult =
- text "rts_checkSchedStatus" <>
- parens (doubleQuotes (text mod_nm <> char '.' <> ptext c_nm) <> comma <> text "rc") <> semi $$
- (case res of
- Nothing -> text "return"
- Just _ -> text "return" <> parens (res_name)) <> semi
-
- res_name =
- case res of
- Nothing -> empty
- Just t -> unpackHObj t <> parens (text "ret")
+ return_what | res_ty_is_unit = empty
+ | otherwise = parens (unpackHObj res_ty <> parens (text "ret"))
c_args = mkCArgNames 0 args
-- Random other things
main_NAME, ioTyCon_NAME,
deRefStablePtr_NAME, makeStablePtr_NAME,
- bindIO_NAME,
+ bindIO_NAME, returnIO_NAME,
maybeCharLikeCon, maybeIntLikeCon,
needsDataDeclCtxtClassKeys, cCallishClassKeys, cCallishTyKeys,
-- Operations needed when compiling FFI decls
bindIO_NAME = mkKnownKeyGlobal (bindIO_RDR, bindIOIdKey)
+returnIO_NAME = mkKnownKeyGlobal (returnIO_RDR, returnIOIdKey)
deRefStablePtr_NAME = mkKnownKeyGlobal (deRefStablePtr_RDR, deRefStablePtrIdKey)
makeStablePtr_NAME = mkKnownKeyGlobal (makeStablePtr_RDR, makeStablePtrIdKey)
, (deRefStablePtr_RDR, deRefStablePtrIdKey)
, (makeStablePtr_RDR, makeStablePtrIdKey)
, (bindIO_RDR, bindIOIdKey)
+ , (returnIO_RDR, returnIOIdKey)
, (map_RDR, mapIdKey)
, (append_RDR, appendIdKey)
ioTyCon_RDR = tcQual pREL_IO_BASE_Name SLIT("IO")
ioDataCon_RDR = dataQual pREL_IO_BASE_Name SLIT("IO")
bindIO_RDR = varQual pREL_IO_BASE_Name SLIT("bindIO")
+returnIO_RDR = varQual pREL_IO_BASE_Name SLIT("returnIO")
orderingTyCon_RDR = tcQual pREL_BASE_Name SLIT("Ordering")
mod_map_result ->
-- READ THE MODULE IN
- findAndReadIface doc_str mod_name from below_me
- `thenRn` \ (hi_boot_read, read_result) ->
+ findAndReadIface doc_str mod_name from below_me `thenRn` \ (hi_boot_read, read_result) ->
case read_result of {
Nothing -> -- Not found, so add an empty export env to the Ifaces map
-- so that we don't look again
text (show err)]
getDeclErr name
- = ptext SLIT("Failed to find interface decl for") <+> quotes (ppr name)
+ = vcat [ptext SLIT("Failed to find interface decl for") <+> quotes (ppr name),
+ ptext SLIT("from module") <+> quotes (ppr (nameModule name))
+ ]
getDeclWarn name loc
= sep [ptext SLIT("Failed to find (optional) interface decl for") <+> quotes (ppr name),
case lookupFM himap x of
Nothing -> returnRn (mkVanillaModule x)
Just (_,x) -> returnRn x
-
\end{code}
import BasicTypes ( TopLevelFlag(..) )
import FiniteMap ( elemFM )
import PrelInfo ( derivableClassKeys,
- deRefStablePtr_NAME, makeStablePtr_NAME, bindIO_NAME
+ deRefStablePtr_NAME, makeStablePtr_NAME, bindIO_NAME, returnIO_NAME
)
import Bag ( bagToList )
import List ( partition, nub )
FoLabel -> emptyFVs
FoExport | isDyn -> mkNameSet [makeStablePtr_NAME,
deRefStablePtr_NAME,
- bindIO_NAME]
+ bindIO_NAME, returnIO_NAME]
| otherwise -> mkNameSet [name']
_ -> emptyFVs
in
import WorkWrap ( wwTopBinds )
import CprAnalyse ( cprAnalyse )
-import Unique ( Unique, Uniquable(..),
- ratioTyConKey
- )
+import Unique ( Unique, Uniquable(..) )
import UniqSupply ( UniqSupply, mkSplitUniqSupply, splitUniqSupply, uniqFromSupply )
import Util ( mapAccumL )
import SrcLoc ( noSrcLoc )
other -> AbsApproxFun ds val
#ifdef DEBUG
-absApply anal f@(AbsProd _) arg = pprPanic ("absApply: Duff function: AbsProd." ++ show anal) ((ppr f) <+> (ppr arg))
+absApply anal f@(AbsProd _) arg
+ = pprPanic ("absApply: Duff function: AbsProd." ++ show anal) ((ppr f) <+> (ppr arg))
#endif
\end{code}
instToId inst = instToIdBndr inst
instToIdBndr :: Inst -> TcId
-instToIdBndr (Dict u (Class clas ty) (_,loc,_))
- = mkUserLocal (mkDictOcc (getOccName clas)) u (mkDictTy clas ty) loc
+instToIdBndr (Dict u (Class clas tys) (_,loc,_))
+ = mkUserLocal (mkDictOcc (getOccName clas)) u (mkDictTy clas tys) loc
instToIdBndr (Dict u (IParam n ty) (_,loc,_))
= ipToId n ty loc
import NameSet ( emptyNameSet )
import Outputable
import Type ( Type, ThetaType, ClassContext,
- mkFunTy, mkTyVarTy, mkTyVarTys, mkDictTy,
+ mkFunTy, mkTyVarTy, mkTyVarTys, mkDictTy, mkDictTys,
mkSigmaTy, mkForAllTys, mkClassPred, classesOfPreds,
boxedTypeKind, mkArrowKind
)
let
sc_theta' = classesOfPreds sc_theta
- sc_tys = [mkDictTy sc tys | (sc,tys) <- sc_theta']
+ sc_tys = mkDictTys sc_theta'
sc_sel_ids = zipWithEqual "tcClassContext" mk_super_id sc_sel_names sc_tys
in
-- Done
(x:xs) ->
check (isAddrTy x) (illegalForeignTyErr True{-Arg-} ty) `thenTc_`
mapTc (checkForeignArg (isFFIArgumentTy is_safe)) xs `thenTc_`
- checkForeignRes (isFFIResultTy) res
+ checkForeignRes True {-NonIO ok-} isFFIResultTy res
| otherwise =
mapTc (checkForeignArg (isFFIArgumentTy is_safe)) args `thenTc_`
- checkForeignRes (isFFIResultTy) res
+ checkForeignRes True {-NonIO ok-} isFFIResultTy res
checkForeignExport :: Bool -> Type -> [Type] -> Type -> TcM s ()
checkForeignExport is_dynamic ty args res
| is_dynamic =
-- * the first (and only!) arg has got to be a function type
- -- * result type is an Addr
+ -- and it must return IO t
+ -- * result type is an Addr or IO Addr
case args of
[arg] ->
case splitFunTys arg of
(arg_tys, res_ty) ->
- mapTc (checkForeignArg isFFIExternalTy) arg_tys `thenTc_`
- checkForeignRes (isFFIResultTy) res_ty `thenTc_`
- checkForeignRes (isAddrTy) res
+ mapTc (checkForeignArg isFFIExternalTy) arg_tys `thenTc_`
+ checkForeignRes True {-NonIO ok-} isFFIResultTy res_ty `thenTc_`
+ checkForeignRes False {-Must be IO-} isAddrTy res
_ -> check False (illegalForeignTyErr True{-Arg-} ty)
| otherwise =
mapTc (checkForeignArg isFFIExternalTy) args `thenTc_`
- checkForeignRes (isFFIResultTy) res
+ checkForeignRes True {-NonIO ok-} isFFIResultTy res
-check :: Bool -> Message -> TcM s ()
-check True _ = returnTc ()
-check _ the_err = addErrTc the_err `thenNF_Tc_` returnTc ()
-
checkForeignArg :: (Type -> Bool) -> Type -> TcM s ()
checkForeignArg pred ty = check (pred ty) (illegalForeignTyErr True{-Arg-} ty)
-- Check that the type has the form
-- (IO t) or (t) , and that t satisfies the given predicate.
--
-checkForeignRes :: (Type -> Bool) -> Type -> TcM s ()
-checkForeignRes pred_res_ty ty =
+checkForeignRes :: Bool -> (Type -> Bool) -> Type -> TcM s ()
+checkForeignRes non_io_result_ok pred_res_ty ty =
case (splitTyConApp_maybe ty) of
Just (io, [res_ty])
| (getUnique io) == ioTyConKey && pred_res_ty res_ty
-> returnTc ()
_
- | pred_res_ty ty -> returnTc ()
- | otherwise -> check False (illegalForeignTyErr False{-Res-} ty)
-
+ -> check (non_io_result_ok && pred_res_ty ty)
+ (illegalForeignTyErr False{-Res-} ty)
\end{code}
Warnings
\begin{code}
+check :: Bool -> Message -> TcM s ()
+check True _ = returnTc ()
+check _ the_err = addErrTc the_err `thenNF_Tc_` returnTc ()
+
illegalForeignTyErr isArg ty
= hang (hsep [ptext SLIT("Unacceptable"), arg_or_res, ptext SLIT("type in foreign declaration:")])
4 (hsep [ppr ty])
foreignDeclCtxt fo =
hang (ptext SLIT("When checking declaration:"))
4 (ppr fo)
-
\end{code}
import TcMonoType ( kcHsTyVar )
import TcType ( TcKind, newKindVar, newKindVars, kindToTcKind, zonkTcKindToKind )
-import Type ( mkArrowKind, boxedTypeKind, mkDictTy )
+import Type ( mkArrowKind, boxedTypeKind )
import Class ( Class )
import Var ( TyVar, tyVarKind )
mkTyConApp, mkTyConTy, splitTyConApp_maybe,
splitAlgTyConApp_maybe, splitAlgTyConApp,
- mkDictTy, mkPredTy, splitPredTy_maybe, splitDictTy_maybe, isDictTy,
+ mkDictTy, mkDictTys, mkPredTy, splitPredTy_maybe, splitDictTy_maybe, isDictTy,
mkSynTy, isSynTy, deNoteType,
mkDictTy :: Class -> [Type] -> Type
mkDictTy clas tys = TyConApp (classTyCon clas) tys
+mkDictTys :: ClassContext -> [Type]
+mkDictTys cxt = [mkDictTy cls tys | (cls,tys) <- cxt]
+
mkPredTy :: PredType -> Type
mkPredTy (Class clas tys) = TyConApp (classTyCon clas) tys
mkPredTy (IParam n ty) = NoteTy (IPNote n) ty
-{-
-splitDictTy_maybe :: Type -> Maybe (Class, [Type])
-splitDictTy_maybe (TyConApp tc tys)
- | maybeToBool maybe_class
- && tyConArity tc == length tys = Just (clas, tys)
- where
- maybe_class = tyConClass_maybe tc
- Just clas = maybe_class
-
-splitDictTy_maybe (NoteTy _ ty) = splitDictTy_maybe ty
-splitDictTy_maybe other = Nothing
--}
-
splitPredTy_maybe :: Type -> Maybe PredType
splitPredTy_maybe (TyConApp tc tys)
| maybeToBool maybe_class
splitDictTy_maybe :: Type -> Maybe (Class, [Type])
splitDictTy_maybe ty
= case splitPredTy_maybe ty of
- Just p -> getClassTys_maybe p
+ Just p -> getClassTys_maybe p
Nothing -> Nothing
isDictTy :: Type -> Bool
getClassTys_maybe :: PredType -> Maybe ClassPred
getClassTys_maybe (Class clas tys) = Just (clas, tys)
-getClassTys_maybe _ = Nothing
+getClassTys_maybe _ = Nothing
ipName_maybe :: PredType -> Maybe Name
ipName_maybe (IParam n _) = Just n
#include "HsVersions.h"
import TypeRep ( Type(..), TyNote(..) ) -- friend
-import Type ( mkDictTy )
import TyCon ( TyCon, ArgVrcs, tyConKind, tyConArity, tyConDataCons, tyConTyVars,
tyConArgVrcs_maybe, getSynTyConDefn, isSynTyCon, isAlgTyCon )
import DataCon ( dataConRepArgTys )
% -----------------------------------------------------------------------------
-% $Id: PrelIOBase.lhs,v 1.19 2000/03/28 08:51:09 simonmar Exp $
+% $Id: PrelIOBase.lhs,v 1.20 2000/04/07 13:45:48 simonpj Exp $
%
% (c) The AQUA Project, Glasgow University, 1994-1998
%
{-# INLINE (>>) #-}
{-# INLINE (>>=) #-}
m >> k = m >>= \ _ -> k
- return x = IO $ \ s -> (# s, x #)
+ return x = returnIO x
m >>= k = bindIO m k
fail s = error s -- not ioError?
(# new_s, a #) -> unIO (k a) new_s
)
+returnIO :: a -> IO a
+returnIO x = IO (\ s -> (# s, x #))
#endif
\end{code}
projects / ghc-hetmet.git / commitdiff