NewOrData(..), StrictnessMark(..) )
import ForeignCall ( Safety(..), CCallConv(..), CCallTarget(..) )
import HsDecls ( CImportSpec(..), ForeignImport(..), ForeignDecl(..) )
-import FastString( mkFastString, nilFS )
-import Char ( ord, isAlphaNum )
+import FastString( FastString, mkFastString, nilFS )
+import Char ( ord, isAscii, isAlphaNum, isAlpha )
import List ( partition )
+import ErrUtils (Message)
import Outputable
-------------------------------------------------------------------
-convertToHsDecls :: [Meta.Dec] -> [HsDecl RdrName]
+convertToHsDecls :: [Meta.Dec] -> [Either (HsDecl RdrName) Message]
convertToHsDecls ds = map cvt_top ds
-cvt_top d@(Val _ _ _) = ValD (cvtd d)
-cvt_top d@(Fun _ _) = ValD (cvtd d)
+cvt_top :: Meta.Dec -> Either (HsDecl RdrName) Message
+cvt_top d@(Val _ _ _) = Left $ ValD (cvtd d)
+cvt_top d@(Fun _ _) = Left $ ValD (cvtd d)
cvt_top (TySyn tc tvs rhs)
- = TyClD (TySynonym (tconName tc) (cvt_tvs tvs) (cvtType rhs) loc0)
+ = Left $ TyClD (TySynonym (tconName tc) (cvt_tvs tvs) (cvtType rhs) loc0)
cvt_top (Data tc tvs constrs derivs)
- = TyClD (mkTyData DataType
- (noContext, tconName tc, cvt_tvs tvs)
- (DataCons (map mk_con constrs))
- (mk_derivs derivs) loc0)
+ = Left $ TyClD (mkTyData DataType
+ (noContext, tconName tc, cvt_tvs tvs)
+ (DataCons (map mk_con constrs))
+ (mk_derivs derivs) loc0)
where
mk_con (Constr c tys)
= ConDecl (cName c) noExistentials noContext
mk_derivs cs = Just [HsClassP (tconName c) [] | c <- cs]
cvt_top (Class ctxt cl tvs decs)
- = TyClD (mkClassDecl (cvt_context ctxt, tconName cl, cvt_tvs tvs)
- noFunDeps
- sigs (Just binds) loc0)
+ = Left $ TyClD (mkClassDecl (cvt_context ctxt, tconName cl, cvt_tvs tvs)
+ noFunDeps
+ sigs (Just binds) loc0)
where
(binds,sigs) = cvtBindsAndSigs decs
cvt_top (Instance tys ty decs)
- = InstD (InstDecl inst_ty binds sigs Nothing loc0)
+ = Left $ InstD (InstDecl inst_ty binds sigs Nothing loc0)
where
(binds, sigs) = cvtBindsAndSigs decs
inst_ty = HsForAllTy Nothing
(cvt_context tys)
(HsPredTy (cvt_pred ty))
-cvt_top (Proto nm typ) = SigD (Sig (vName nm) (cvtType typ) loc0)
+cvt_top (Proto nm typ) = Left $ SigD (Sig (vName nm) (cvtType typ) loc0)
cvt_top (Foreign (Import callconv safety from nm typ))
- = ForD (ForeignImport (vName nm) (cvtType typ) fi False loc0)
- where fi = CImport callconv' safety' c_header nilFS cis
- callconv' = case callconv of
+ = case parsed of
+ Just (c_header, cis) ->
+ let i = CImport callconv' safety' c_header nilFS cis
+ in Left $ ForD (ForeignImport (vName nm) (cvtType typ) i False loc0)
+ Nothing -> Right $ text (show from)
+ <+> ptext SLIT("is not a valid ccall impent")
+ where callconv' = case callconv of
CCall -> CCallConv
StdCall -> StdCallConv
safety' = case safety of
Unsafe -> PlayRisky
Safe -> PlaySafe False
Threadsafe -> PlaySafe True
- (c_header', c_func') = break (== ' ') from
- c_header = mkFastString c_header'
- c_func = tail c_func'
- cis = CFunction (StaticTarget (mkFastString c_func))
+ parsed = parse_ccall_impent nm from
+
+parse_ccall_impent :: String -> String -> Maybe (FastString, CImportSpec)
+parse_ccall_impent nm s
+ = case lex_ccall_impent s of
+ Just ["dynamic"] -> Just (nilFS, CFunction DynamicTarget)
+ Just ["wrapper"] -> Just (nilFS, CWrapper)
+ Just ("static":ts) -> parse_ccall_impent_static nm ts
+ Just ts -> parse_ccall_impent_static nm ts
+ Nothing -> Nothing
+
+parse_ccall_impent_static :: String
+ -> [String]
+ -> Maybe (FastString, CImportSpec)
+parse_ccall_impent_static nm ts
+ = let ts' = case ts of
+ [ "&", cid] -> [ cid]
+ [fname, "&" ] -> [fname ]
+ [fname, "&", cid] -> [fname, cid]
+ _ -> ts
+ in case ts' of
+ [ cid] | is_cid cid -> Just (nilFS, mk_cid cid)
+ [fname, cid] | is_cid cid -> Just (mkFastString fname, mk_cid cid)
+ [ ] -> Just (nilFS, mk_cid nm)
+ [fname ] -> Just (mkFastString fname, mk_cid nm)
+ _ -> Nothing
+ where is_cid :: String -> Bool
+ is_cid x = all (/= '.') x && (isAlpha (head x) || head x == '_')
+ mk_cid :: String -> CImportSpec
+ mk_cid = CFunction . StaticTarget . mkFastString
+
+lex_ccall_impent :: String -> Maybe [String]
+lex_ccall_impent "" = Just []
+lex_ccall_impent ('&':xs) = fmap ("&":) $ lex_ccall_impent xs
+lex_ccall_impent (' ':xs) = lex_ccall_impent xs
+lex_ccall_impent ('\t':xs) = lex_ccall_impent xs
+lex_ccall_impent xs = case span is_valid xs of
+ ("", _) -> Nothing
+ (t, xs') -> fmap (t:) $ lex_ccall_impent xs'
+ where is_valid :: Char -> Bool
+ is_valid c = isAscii c && (isAlphaNum c || c `elem` "._")
noContext = []
noExistentials = []
cvt (App x y) = HsApp (cvt x) (cvt y)
cvt (Lam ps e) = HsLam (mkSimpleMatch (map cvtp ps) (cvt e) void loc0)
+cvt (Tup [e]) = cvt e
cvt (Tup es) = ExplicitTuple(map cvt es) Boxed
cvt (Cond x y z) = HsIf (cvt x) (cvt y) (cvt z) loc0
cvt (Let ds e) = HsLet (cvtdecs ds) (cvt e)
-- Used only for declarations in a 'let/where' clause,
-- not for top level decls
cvtd (Val (Pvar s) body ds) = FunMonoBind (vName s) False
- (panic "what now?") loc0
+ [cvtclause (Clause [] body ds)] loc0
cvtd (Fun nm cls) = FunMonoBind (vName nm) False (map cvtclause cls) loc0
cvtd (Val p body ds) = PatMonoBind (cvtp p) (GRHSs (cvtguard body)
(cvtdecs ds)
cvtclause :: Meta.Clause (Meta.Pat) (Meta.Exp) (Meta.Dec) -> Hs.Match RdrName
-cvtclause (ps,body,wheres) = Match (map cvtp ps) Nothing
- (GRHSs (cvtguard body) (cvtdecs wheres) void)
+cvtclause (Clause ps body wheres)
+ = Match (map cvtp ps) Nothing (GRHSs (cvtguard body) (cvtdecs wheres) void)
cvtm :: Meta.Mat -> Hs.Match RdrName
-cvtm (p,body,wheres) = Match [cvtp p] Nothing
- (GRHSs (cvtguard body) (cvtdecs wheres) void)
+cvtm (Mat p body wheres)
+ = Match [cvtp p] Nothing (GRHSs (cvtguard body) (cvtdecs wheres) void)
cvtguard :: Meta.Rhs -> [GRHS RdrName]
cvtguard (Guarded pairs) = map cvtpair pairs
-- about that!
| otherwise = LitPat (cvtLit l)
cvtp (Pvar s) = VarPat(vName s)
+cvtp (Ptup [p]) = cvtp p
cvtp (Ptup ps) = TuplePat (map cvtp ps) Boxed
cvtp (Pcon s ps) = ConPatIn (cName s) (PrefixCon (map cvtp ps))
cvtp (Ptilde p) = LazyPat (cvtp p)
cvt_pred :: Typ -> HsPred RdrName
cvt_pred ty = case split_ty_app ty of
- (Tvar tc, tys) -> HsClassP (tconName tc) (map cvtType tys)
+ (Tcon (TconName tc), tys) -> HsClassP (tconName tc) (map cvtType tys)
other -> panic "Malformed predicate"
cvtType :: Meta.Typ -> HsType RdrName
projects / ghc-hetmet.git / blobdiff