\begin{code}
-module Convert( convertToHsExpr, convertToHsDecls ) where
+module Convert( convertToHsExpr, convertToHsDecls, convertToHsType, thRdrName ) where
#include "HsVersions.h"
-import Language.Haskell.THSyntax as Meta
+import Language.Haskell.TH as TH hiding (sigP)
+import Language.Haskell.TH.Syntax as TH
import HsSyn as Hs
- ( HsExpr(..), HsLit(..), ArithSeqInfo(..),
- HsStmtContext(..), TyClDecl(..),
- Match(..), GRHSs(..), GRHS(..), HsPred(..),
- HsDecl(..), TyClDecl(..), InstDecl(..), ConDecl(..),
- Stmt(..), HsBinds(..), MonoBinds(..), Sig(..),
- Pat(..), HsConDetails(..), HsOverLit, BangType(..),
- placeHolderType, HsType(..), HsTupCon(..),
- HsTyVarBndr(..), HsContext,
- mkSimpleMatch
- )
-
-import RdrName ( RdrName, mkRdrUnqual, mkRdrQual, mkOrig )
-import Module ( mkModuleName )
-import RdrHsSyn ( mkHsIntegral, mkHsFractional, mkClassDecl, mkTyData )
-import OccName
-import SrcLoc ( SrcLoc, generatedSrcLoc )
-import TyCon ( DataConDetails(..) )
+import qualified Class (FunDep)
+import RdrName ( RdrName, mkRdrUnqual, mkRdrQual, mkOrig, getRdrName, nameRdrName )
+import Name ( mkInternalName )
+import Module ( Module, mkModule )
+import RdrHsSyn ( mkClassDecl, mkTyData )
+import qualified OccName
+import SrcLoc ( unLoc, Located(..), SrcSpan )
import Type ( Type )
-import BasicTypes( Boxity(..), RecFlag(Recursive),
- NewOrData(..), StrictnessMark(..) )
-import ForeignCall ( Safety(..), CCallConv(..), CCallTarget(..) )
-import HsDecls ( CImportSpec(..), ForeignImport(..), ForeignDecl(..) )
-import FastString( mkFastString, nilFS )
-import Char ( ord, isAlphaNum )
+import TysWiredIn ( unitTyCon, tupleTyCon, trueDataCon )
+import BasicTypes( Boxity(..) )
+import ForeignCall ( Safety(..), CCallConv(..), CCallTarget(..),
+ CExportSpec(..))
+import Char ( isAscii, isAlphaNum, isAlpha )
import List ( partition )
+import Unique ( Unique, mkUniqueGrimily )
+import ErrUtils (Message)
+import GLAEXTS ( Int(..), Int# )
+import SrcLoc ( noSrcLoc )
+import Bag ( emptyBag, consBag )
+import FastString
import Outputable
-------------------------------------------------------------------
-convertToHsDecls :: [Meta.Dec] -> [HsDecl RdrName]
-convertToHsDecls ds = map cvt_top ds
-
-
-cvt_top d@(Val _ _ _) = ValD (cvtd d)
-cvt_top d@(Fun _ _) = ValD (cvtd d)
+convertToHsDecls :: SrcSpan -> [TH.Dec] -> [Either (LHsDecl RdrName) Message]
+-- Use the loc everywhere, for lack of anything better
+-- In particular, we want it on binding locations, so that variables bound in
+-- the spliced-in declarations get a location that at least relates to the splice point
+convertToHsDecls loc ds = map (cvt_top loc) ds
+
+cvt_top :: SrcSpan -> TH.Dec -> Either (LHsDecl RdrName) Message
+cvt_top loc d@(TH.ValD _ _ _) = Left $ L loc $ Hs.ValD (unLoc (cvtd loc d))
+cvt_top loc d@(TH.FunD _ _) = Left $ L loc $ Hs.ValD (unLoc (cvtd loc d))
+cvt_top loc (TH.SigD nm typ) = Left $ L loc $ Hs.SigD (TypeSig (L loc (vName nm)) (cvtType loc typ))
-cvt_top (TySyn tc tvs rhs)
- = 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)
+cvt_top loc (TySynD tc tvs rhs)
+ = Left $ L loc $ TyClD (TySynonym (L loc (tconName tc)) (cvt_tvs loc tvs) (cvtType loc rhs))
+
+cvt_top loc (DataD ctxt tc tvs constrs derivs)
+ = Left $ L loc $ TyClD (mkTyData DataType
+ (L loc (cvt_context loc ctxt, L loc (tconName tc), cvt_tvs loc tvs))
+ Nothing (map (mk_con loc) constrs)
+ (mk_derivs loc derivs))
+
+cvt_top loc (NewtypeD ctxt tc tvs constr derivs)
+ = Left $ L loc $ TyClD (mkTyData NewType
+ (L loc (cvt_context loc ctxt, L loc (tconName tc), cvt_tvs loc tvs))
+ Nothing [mk_con loc constr]
+ (mk_derivs loc derivs))
+
+cvt_top loc (ClassD ctxt cl tvs fds decs)
+ = Left $ L loc $ TyClD $ mkClassDecl (cvt_context loc ctxt,
+ L loc (tconName cl),
+ cvt_tvs loc tvs)
+ (map (L loc . cvt_fundep) fds)
+ sigs
+ binds
where
- mk_con (Constr c tys)
- = ConDecl (cName c) noExistentials noContext
- (PrefixCon (map mk_arg tys)) loc0
-
- mk_arg ty = BangType NotMarkedStrict (cvtType ty)
+ (binds,sigs) = cvtBindsAndSigs loc decs
- mk_derivs [] = Nothing
- 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)
+cvt_top loc (InstanceD tys ty decs)
+ = Left $ L loc $ InstD (InstDecl (L loc inst_ty) binds sigs)
where
- (binds,sigs) = cvtBindsAndSigs decs
-
-cvt_top (Instance tys ty decs)
- = 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 (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
+ (binds, sigs) = cvtBindsAndSigs loc decs
+ inst_ty = mkImplicitHsForAllTy (cvt_context loc tys) (L loc (HsPredTy (cvt_pred loc ty)))
+
+cvt_top loc (ForeignD (ImportF callconv safety from nm typ))
+ = case parsed of
+ Just (c_header, cis) ->
+ let i = CImport callconv' safety' c_header nilFS cis
+ in Left $ L loc $ ForD (ForeignImport (L loc (vName nm)) (cvtType loc typ) i False)
+ 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 (TH.nameBase nm) from
+
+cvt_top loc (ForeignD (ExportF callconv as nm typ))
+ = let e = CExport (CExportStatic (mkFastString as) callconv')
+ in Left $ L loc $ ForD (ForeignExport (L loc (vName nm)) (cvtType loc typ) e False)
+ where callconv' = case callconv of
+ CCall -> CCallConv
+ StdCall -> StdCallConv
-noContext = []
+mk_con loc con = L loc $ mk_nlcon con
+ where
+ -- Can't handle GADTs yet
+ mk_nlcon con = case con of
+ NormalC c strtys
+ -> ConDecl (L loc (cName c)) Explicit noExistentials (noContext loc)
+ (PrefixCon (map mk_arg strtys)) ResTyH98
+ RecC c varstrtys
+ -> ConDecl (L loc (cName c)) Explicit noExistentials (noContext loc)
+ (RecCon (map mk_id_arg varstrtys)) ResTyH98
+ InfixC st1 c st2
+ -> ConDecl (L loc (cName c)) Explicit noExistentials (noContext loc)
+ (InfixCon (mk_arg st1) (mk_arg st2)) ResTyH98
+ ForallC tvs ctxt (ForallC tvs' ctxt' con')
+ -> mk_nlcon (ForallC (tvs ++ tvs') (ctxt ++ ctxt') con')
+ ForallC tvs ctxt con' -> case mk_nlcon con' of
+ ConDecl l _ [] (L _ []) x ResTyH98 ->
+ ConDecl l Explicit (cvt_tvs loc tvs) (cvt_context loc ctxt) x ResTyH98
+ c -> panic "ForallC: Can't happen"
+ mk_arg (IsStrict, ty) = L loc $ HsBangTy HsStrict (cvtType loc ty)
+ mk_arg (NotStrict, ty) = cvtType loc ty
+
+ mk_id_arg (i, IsStrict, ty)
+ = (L loc (vName i), L loc $ HsBangTy HsStrict (cvtType loc ty))
+ mk_id_arg (i, NotStrict, ty)
+ = (L loc (vName i), cvtType loc ty)
+
+mk_derivs loc [] = Nothing
+mk_derivs loc cs = Just [L loc $ HsPredTy $ HsClassP (tconName c) [] | c <- cs]
+
+cvt_fundep :: FunDep -> Class.FunDep RdrName
+cvt_fundep (FunDep xs ys) = (map tName xs, map tName ys)
+
+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 loc = L loc []
noExistentials = []
-noFunDeps = []
-------------------------------------------------------------------
-convertToHsExpr :: Meta.Exp -> HsExpr RdrName
-convertToHsExpr = cvt
-
-cvt (Var s) = HsVar(vName s)
-cvt (Con s) = HsVar(cName s)
-cvt (Lit l)
- | overloadedLit l = HsOverLit (cvtOverLit l)
- | otherwise = HsLit (cvtLit l)
-
-cvt (App x y) = HsApp (cvt x) (cvt y)
-cvt (Lam ps e) = HsLam (mkSimpleMatch (map cvtp ps) (cvt e) void loc0)
-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)
-cvt (Case e ms) = HsCase (cvt e) (map cvtm ms) loc0
-cvt (Do ss) = HsDo DoExpr (cvtstmts ss) [] void loc0
-cvt (Comp ss) = HsDo ListComp (cvtstmts ss) [] void loc0
-cvt (ArithSeq dd) = ArithSeqIn (cvtdd dd)
-cvt (ListExp xs) = ExplicitList void (map cvt xs)
-cvt (Infix (Just x) s (Just y))
- = HsPar (OpApp (cvt x) (HsVar(vName s)) undefined (cvt y))
-cvt (Infix Nothing s (Just y)) = SectionR (HsVar(vName s)) (cvt y)
-cvt (Infix (Just x) s Nothing ) = SectionL (cvt x) (HsVar(vName s))
-cvt (Infix Nothing s Nothing ) = HsVar(vName s) -- Can I indicate this is an infix thing?
-cvt (SigExp e t) = ExprWithTySig (cvt e) (cvtType t)
-
-cvtdecs :: [Meta.Dec] -> HsBinds RdrName
-cvtdecs [] = EmptyBinds
-cvtdecs ds = MonoBind binds sigs Recursive
+convertToHsExpr :: SrcSpan -> TH.Exp -> LHsExpr RdrName
+convertToHsExpr loc e = cvtl loc e
+
+cvtl loc e = cvt_l e
+ where
+ cvt_l e = L loc (cvt e)
+
+ cvt (VarE s) = HsVar (vName s)
+ cvt (ConE s) = HsVar (cName s)
+ cvt (LitE l)
+ | overloadedLit l = HsOverLit (cvtOverLit l)
+ | otherwise = HsLit (cvtLit l)
+
+ cvt (AppE x y) = HsApp (cvt_l x) (cvt_l y)
+ cvt (LamE ps e) = HsLam (mkMatchGroup [mkSimpleMatch (map (cvtlp loc) ps) (cvtl loc e)])
+ cvt (TupE [e]) = cvt e
+ cvt (TupE es) = ExplicitTuple(map cvt_l es) Boxed
+ cvt (CondE x y z) = HsIf (cvt_l x) (cvt_l y) (cvt_l z)
+ cvt (LetE ds e) = HsLet (cvtdecs loc ds) (cvt_l e)
+ cvt (CaseE e ms) = HsCase (cvt_l e) (mkMatchGroup (map (cvtm loc) ms))
+ cvt (DoE ss) = cvtHsDo loc DoExpr ss
+ cvt (CompE ss) = cvtHsDo loc ListComp ss
+ cvt (ArithSeqE dd) = ArithSeq noPostTcExpr (cvtdd loc dd)
+ cvt (ListE xs) = ExplicitList void (map cvt_l xs)
+ cvt (InfixE (Just x) s (Just y))
+ = HsPar (L loc $ OpApp (cvt_l x) (cvt_l s) undefined (cvt_l y))
+ cvt (InfixE Nothing s (Just y)) = SectionR (cvt_l s) (cvt_l y)
+ cvt (InfixE (Just x) s Nothing ) = SectionL (cvt_l x) (cvt_l s)
+ cvt (InfixE Nothing s Nothing ) = cvt s -- Can I indicate this is an infix thing?
+ cvt (SigE e t) = ExprWithTySig (cvt_l e) (cvtType loc t)
+ cvt (RecConE c flds) = RecordCon (L loc (cName c)) noPostTcExpr
+ (map (\(x,y) -> (L loc (vName x), cvt_l y)) flds)
+ cvt (RecUpdE e flds) = RecordUpd (cvt_l e) (map (\(x,y) -> (L loc (vName x), cvt_l y)) flds)
+ placeHolderType placeHolderType
+
+cvtHsDo loc do_or_lc stmts
+ = HsDo do_or_lc (init stmts') body void
+ where
+ stmts' = cvtstmts loc stmts
+ body = case last stmts' of
+ L _ (ExprStmt body _ _) -> body
+
+cvtdecs :: SrcSpan -> [TH.Dec] -> HsLocalBinds RdrName
+cvtdecs loc [] = EmptyLocalBinds
+cvtdecs loc ds = HsValBinds (ValBindsIn binds sigs)
where
- (binds, sigs) = cvtBindsAndSigs ds
+ (binds, sigs) = cvtBindsAndSigs loc ds
-cvtBindsAndSigs ds
- = (cvtds non_sigs, map cvtSig sigs)
+cvtBindsAndSigs loc ds
+ = (cvtds loc non_sigs, map (cvtSig loc) sigs)
where
(sigs, non_sigs) = partition sigP ds
-cvtSig (Proto nm typ) = Sig (vName nm) (cvtType typ) loc0
+cvtSig loc (TH.SigD nm typ) = L loc (Hs.TypeSig (L loc (vName nm)) (cvtType loc typ))
-cvtds :: [Meta.Dec] -> MonoBinds RdrName
-cvtds [] = EmptyMonoBinds
-cvtds (d:ds) = AndMonoBinds (cvtd d) (cvtds ds)
+cvtds :: SrcSpan -> [TH.Dec] -> LHsBinds RdrName
+cvtds loc [] = emptyBag
+cvtds loc (d:ds) = cvtd loc d `consBag` cvtds loc ds
-cvtd :: Meta.Dec -> MonoBinds RdrName
+cvtd :: SrcSpan -> TH.Dec -> LHsBind RdrName
-- 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
-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)
- void) loc0
-cvtd x = panic "Illegal kind of declaration in where clause"
-
-
-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)
-
-
-
-cvtdd :: Meta.DDt -> ArithSeqInfo RdrName
-cvtdd (Meta.From x) = (Hs.From (cvt x))
-cvtdd (Meta.FromThen x y) = (Hs.FromThen (cvt x) (cvt y))
-cvtdd (Meta.FromTo x y) = (Hs.FromTo (cvt x) (cvt y))
-cvtdd (Meta.FromThenTo x y z) = (Hs.FromThenTo (cvt x) (cvt y) (cvt z))
-
-
-cvtstmts :: [Meta.Stm] -> [Hs.Stmt RdrName]
-cvtstmts [] = [] -- this is probably an error as every [stmt] should end with ResultStmt
-cvtstmts [NoBindSt e] = [ResultStmt (cvt e) loc0] -- when its the last element use ResultStmt
-cvtstmts (NoBindSt e : ss) = ExprStmt (cvt e) void loc0 : cvtstmts ss
-cvtstmts (BindSt p e : ss) = BindStmt (cvtp p) (cvt e) loc0 : cvtstmts ss
-cvtstmts (LetSt ds : ss) = LetStmt (cvtdecs ds) : cvtstmts ss
-cvtstmts (ParSt dss : ss) = ParStmt(map cvtstmts dss) : cvtstmts ss
-
-
-cvtm :: Meta.Mat -> Hs.Match RdrName
-cvtm (p,body,wheres) = Match [cvtp p] Nothing
- (GRHSs (cvtguard body) (cvtdecs wheres) void)
-
-cvtguard :: Meta.Rhs -> [GRHS RdrName]
-cvtguard (Guarded pairs) = map cvtpair pairs
-cvtguard (Normal e) = [GRHS [ ResultStmt (cvt e) loc0 ] loc0]
-
-cvtpair :: (Meta.Exp,Meta.Exp) -> GRHS RdrName
-cvtpair (x,y) = GRHS [BindStmt truePat (cvt x) loc0,
- ResultStmt (cvt y) loc0] loc0
-
-cvtOverLit :: Lit -> HsOverLit
-cvtOverLit (Integer i) = mkHsIntegral i
-cvtOverLit (Rational r) = mkHsFractional r
+cvtd loc (TH.ValD (TH.VarP s) body ds)
+ = L loc $ FunBind (L loc (vName s)) False
+ (mkMatchGroup [cvtclause loc (Clause [] body ds)])
+ placeHolderNames
+cvtd loc (FunD nm cls)
+ = L loc $ FunBind (L loc (vName nm)) False
+ (mkMatchGroup (map (cvtclause loc) cls))
+ placeHolderNames
+cvtd loc (TH.ValD p body ds)
+ = L loc $ PatBind (cvtlp loc p) (GRHSs (cvtguard loc body) (cvtdecs loc ds))
+ void placeHolderNames
+
+cvtd loc d = cvtPanic "Illegal kind of declaration in where clause"
+ (text (TH.pprint d))
+
+
+cvtclause :: SrcSpan -> TH.Clause -> Hs.LMatch RdrName
+cvtclause loc (Clause ps body wheres)
+ = L loc $ Hs.Match (map (cvtlp loc) ps) Nothing (GRHSs (cvtguard loc body) (cvtdecs loc wheres))
+
+
+
+cvtdd :: SrcSpan -> Range -> ArithSeqInfo RdrName
+cvtdd loc (FromR x) = (From (cvtl loc x))
+cvtdd loc (FromThenR x y) = (FromThen (cvtl loc x) (cvtl loc y))
+cvtdd loc (FromToR x y) = (FromTo (cvtl loc x) (cvtl loc y))
+cvtdd loc (FromThenToR x y z) = (FromThenTo (cvtl loc x) (cvtl loc y) (cvtl loc z))
+
+
+cvtstmts :: SrcSpan -> [TH.Stmt] -> [Hs.LStmt RdrName]
+cvtstmts loc [] = []
+cvtstmts loc (NoBindS e : ss) = L loc (mkExprStmt (cvtl loc e)) : cvtstmts loc ss
+cvtstmts loc (TH.BindS p e : ss) = L loc (mkBindStmt (cvtlp loc p) (cvtl loc e)) : cvtstmts loc ss
+cvtstmts loc (TH.LetS ds : ss) = L loc (LetStmt (cvtdecs loc ds)) : cvtstmts loc ss
+cvtstmts loc (TH.ParS dss : ss) = L loc (ParStmt [(cvtstmts loc ds, undefined) | ds <- dss]) : cvtstmts loc ss
+
+cvtm :: SrcSpan -> TH.Match -> Hs.LMatch RdrName
+cvtm loc (TH.Match p body wheres)
+ = L loc (Hs.Match [cvtlp loc p] Nothing (GRHSs (cvtguard loc body) (cvtdecs loc wheres)))
+
+cvtguard :: SrcSpan -> TH.Body -> [LGRHS RdrName]
+cvtguard loc (GuardedB pairs) = map (cvtpair loc) pairs
+cvtguard loc (NormalB e) = [L loc (GRHS [] (cvtl loc e))]
+
+cvtpair :: SrcSpan -> (TH.Guard,TH.Exp) -> LGRHS RdrName
+cvtpair loc (NormalG x,y) = L loc (GRHS [L loc $ mkBindStmt truePat (cvtl loc x)]
+ (cvtl loc y))
+cvtpair loc (PatG x,y) = L loc (GRHS (cvtstmts loc x) (cvtl loc y))
+
+cvtOverLit :: Lit -> HsOverLit RdrName
+cvtOverLit (IntegerL i) = mkHsIntegral i
+cvtOverLit (RationalL r) = mkHsFractional r
-- An Integer is like an an (overloaded) '3' in a Haskell source program
-- Similarly 3.5 for fractionals
cvtLit :: Lit -> HsLit
-cvtLit (Char c) = HsChar (ord c)
-cvtLit (String s) = HsString (mkFastString s)
-
-cvtp :: Meta.Pat -> Hs.Pat RdrName
-cvtp (Plit l)
- | overloadedLit l = NPatIn (cvtOverLit l) Nothing -- Not right for negative
+cvtLit (IntPrimL i) = HsIntPrim i
+cvtLit (FloatPrimL f) = HsFloatPrim f
+cvtLit (DoublePrimL f) = HsDoublePrim f
+cvtLit (CharL c) = HsChar c
+cvtLit (StringL s) = HsString (mkFastString s)
+
+cvtlp :: SrcSpan -> TH.Pat -> Hs.LPat RdrName
+cvtlp loc pat = L loc (cvtp loc pat)
+
+cvtp :: SrcSpan -> TH.Pat -> Hs.Pat RdrName
+cvtp loc (TH.LitP l)
+ | overloadedLit l = mkNPat (cvtOverLit l) Nothing -- Not right for negative
-- patterns; need to think
-- about that!
- | otherwise = LitPat (cvtLit l)
-cvtp (Pvar s) = VarPat(vName s)
-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)
-cvtp (Paspat s p) = AsPat (vName s) (cvtp p)
-cvtp Pwild = WildPat void
+ | otherwise = Hs.LitPat (cvtLit l)
+cvtp loc (TH.VarP s) = Hs.VarPat(vName s)
+cvtp loc (TupP [p]) = cvtp loc p
+cvtp loc (TupP ps) = TuplePat (map (cvtlp loc) ps) Boxed
+cvtp loc (ConP s ps) = ConPatIn (L loc (cName s)) (PrefixCon (map (cvtlp loc) ps))
+cvtp loc (InfixP p1 s p2)
+ = ConPatIn (L loc (cName s)) (InfixCon (cvtlp loc p1) (cvtlp loc p2))
+cvtp loc (TildeP p) = LazyPat (cvtlp loc p)
+cvtp loc (TH.AsP s p) = AsPat (L loc (vName s)) (cvtlp loc p)
+cvtp loc TH.WildP = WildPat void
+cvtp loc (RecP c fs) = ConPatIn (L loc (cName c)) $ Hs.RecCon (map (\(s,p) -> (L loc (vName s),cvtlp loc p)) fs)
+cvtp loc (ListP ps) = ListPat (map (cvtlp loc) ps) void
+cvtp loc (SigP p t) = SigPatIn (cvtlp loc p) (cvtType loc t)
-----------------------------------------------------------
-- Types and type variables
-cvt_tvs :: [String] -> [HsTyVarBndr RdrName]
-cvt_tvs tvs = map (UserTyVar . tName) tvs
+cvt_tvs :: SrcSpan -> [TH.Name] -> [LHsTyVarBndr RdrName]
+cvt_tvs loc tvs = map (L loc . UserTyVar . tName) tvs
+
+cvt_context :: SrcSpan -> Cxt -> LHsContext RdrName
+cvt_context loc tys = L loc (map (L loc . cvt_pred loc) tys)
-cvt_context :: Cxt -> HsContext RdrName
-cvt_context tys = map cvt_pred tys
+cvt_pred :: SrcSpan -> TH.Type -> HsPred RdrName
+cvt_pred loc ty
+ = case split_ty_app ty of
+ (ConT tc, tys) -> HsClassP (tconName tc) (map (cvtType loc) tys)
+ (VarT tv, tys) -> HsClassP (tName tv) (map (cvtType loc) tys)
+ other -> cvtPanic "Malformed predicate" (text (TH.pprint ty))
-cvt_pred :: Typ -> HsPred RdrName
-cvt_pred ty = case split_ty_app ty of
- (Tvar tc, tys) -> HsClassP (tconName tc) (map cvtType tys)
- other -> panic "Malformed predicate"
+convertToHsType = cvtType
-cvtType :: Meta.Typ -> HsType RdrName
-cvtType ty = trans (root ty [])
- where root (Tapp a b) zs = root a (cvtType b : zs)
+cvtType :: SrcSpan -> TH.Type -> LHsType RdrName
+cvtType loc ty = trans (root ty [])
+ where root (AppT a b) zs = root a (cvtType loc b : zs)
root t zs = (t,zs)
- trans (Tcon (Tuple n),args) | length args == n
- = HsTupleTy (HsTupCon Boxed n) args
- trans (Tcon Arrow, [x,y]) = HsFunTy x y
- trans (Tcon List, [x]) = HsListTy x
+ trans (TupleT n,args)
+ | length args == n = L loc (HsTupleTy Boxed args)
+ | n == 0 = foldl nlHsAppTy (nlHsTyVar (getRdrName unitTyCon)) args
+ | otherwise = foldl nlHsAppTy (nlHsTyVar (getRdrName (tupleTyCon Boxed n))) args
+ trans (ArrowT, [x,y]) = nlHsFunTy x y
+ trans (ListT, [x]) = L loc (HsListTy x)
- trans (Tvar nm, args) = foldl HsAppTy (HsTyVar (tName nm)) args
- trans (Tcon tc, args) = foldl HsAppTy (HsTyVar (tc_name tc)) args
+ trans (VarT nm, args) = foldl nlHsAppTy (nlHsTyVar (tName nm)) args
+ trans (ConT tc, args) = foldl nlHsAppTy (nlHsTyVar (tconName tc)) args
- tc_name (TconName nm) = tconName nm
- tc_name Arrow = tconName "->"
- tc_name List = tconName "[]"
- tc_name (Tuple 0) = tconName "()"
- tc_name (Tuple n) = tconName ("(" ++ replicate (n-1) ',' ++ ")")
+ trans (ForallT tvs cxt ty, []) = L loc $ mkExplicitHsForAllTy
+ (cvt_tvs loc tvs) (cvt_context loc cxt) (cvtType loc ty)
-split_ty_app :: Typ -> (Typ, [Typ])
+split_ty_app :: TH.Type -> (TH.Type, [TH.Type])
split_ty_app ty = go ty []
where
- go (Tapp f a) as = go f (a:as)
+ go (AppT f a) as = go f (a:as)
go f as = (f,as)
-----------------------------------------------------------
sigP :: Dec -> Bool
-sigP (Proto _ _) = True
+sigP (TH.SigD _ _) = True
sigP other = False
-----------------------------------------------------------
+cvtPanic :: String -> SDoc -> b
+cvtPanic herald thing
+ = pprPanic herald (thing $$ ptext SLIT("When splicing generated code into the program"))
+
+-----------------------------------------------------------
-- some useful things
-truePat = ConPatIn (cName "True") (PrefixCon [])
-falsePat = ConPatIn (cName "False") (PrefixCon [])
+truePat = nlConPat (getRdrName trueDataCon) []
overloadedLit :: Lit -> Bool
-- True for literals that Haskell treats as overloaded
-overloadedLit (Integer l) = True
-overloadedLit (Rational l) = True
-overloadedLit l = False
+overloadedLit (IntegerL l) = True
+overloadedLit (RationalL l) = True
+overloadedLit l = False
void :: Type.Type
void = placeHolderType
-loc0 :: SrcLoc
-loc0 = generatedSrcLoc
+--------------------------------------------------------------------
+-- Turning Name back into RdrName
+--------------------------------------------------------------------
-- variable names
-vName :: String -> RdrName
-vName = mkName varName
+vName :: TH.Name -> RdrName
+vName = thRdrName OccName.varName
--- Constructor function names
-cName :: String -> RdrName
-cName = mkName dataName
+-- Constructor function names; this is Haskell source, hence srcDataName
+cName :: TH.Name -> RdrName
+cName = thRdrName OccName.srcDataName
-- Type variable names
-tName :: String -> RdrName
-tName = mkName tvName
+tName :: TH.Name -> RdrName
+tName = thRdrName OccName.tvName
-- Type Constructor names
-tconName = mkName tcName
-
-mkName :: NameSpace -> String -> RdrName
--- Parse the string to see if it has a "." or ":" in it
--- so we know whether to generate a qualified or original name
--- It's a bit tricky because we need to parse
--- Foo.Baz.x as Qual Foo.Baz x
--- So we parse it from back to front
-
-mkName ns str
- = split [] (reverse str)
- where
- split occ [] = mkRdrUnqual (mk_occ occ)
- split occ (c:d:rev) -- 'd' is the last char before the separator
- | is_sep c -- E.g. Fo.x d='o'
- && isAlphaNum d -- Fo.+: d='+' perhaps
- = mk_qual (reverse (d:rev)) c occ
- split occ (c:rev) = split (c:occ) rev
-
- mk_qual mod '.' occ = mkRdrQual (mk_mod mod) (mk_occ occ)
- mk_qual mod ':' occ = mkOrig (mk_mod mod) (mk_occ occ)
-
- mk_occ occ = mkOccFS ns (mkFastString occ)
- mk_mod mod = mkModuleName mod
-
- is_sep '.' = True
- is_sep ':' = True
- is_sep other = False
+tconName = thRdrName OccName.tcName
+
+thRdrName :: OccName.NameSpace -> TH.Name -> RdrName
+-- This turns a Name into a RdrName
+-- The passed-in name space tells what the context is expecting;
+-- use it unless the TH name knows what name-space it comes
+-- from, in which case use the latter
+thRdrName ctxt_ns (TH.Name occ (TH.NameG th_ns mod)) = mkOrig (mk_mod mod) (mk_occ (mk_ghc_ns th_ns) occ)
+thRdrName ctxt_ns (TH.Name occ (TH.NameL uniq)) = nameRdrName (mkInternalName (mk_uniq uniq) (mk_occ ctxt_ns occ) noSrcLoc)
+thRdrName ctxt_ns (TH.Name occ (TH.NameQ mod)) = mkRdrQual (mk_mod mod) (mk_occ ctxt_ns occ)
+thRdrName ctxt_ns (TH.Name occ TH.NameS) = mkRdrUnqual (mk_occ ctxt_ns occ)
+thRdrName ctxt_ns (TH.Name occ (TH.NameU uniq)) = mkRdrUnqual (mk_uniq_occ ctxt_ns occ uniq)
+
+mk_uniq_occ :: OccName.NameSpace -> TH.OccName -> Int# -> OccName.OccName
+mk_uniq_occ ns occ uniq
+ = OccName.mkOccName ns (TH.occString occ ++ '[' : shows (mk_uniq uniq) "]")
+ -- The idea here is to make a name that
+ -- a) the user could not possibly write, and
+ -- b) cannot clash with another NameU
+ -- Previously I generated an Exact RdrName with mkInternalName.
+ -- This works fine for local binders, but does not work at all for
+ -- top-level binders, which must have External Names, since they are
+ -- rapidly baked into data constructors and the like. Baling out
+ -- and generating an unqualified RdrName here is the simple solution
+
+mk_ghc_ns :: TH.NameSpace -> OccName.NameSpace
+mk_ghc_ns DataName = OccName.dataName
+mk_ghc_ns TH.TcClsName = OccName.tcClsName
+mk_ghc_ns TH.VarName = OccName.varName
+
+-- The packing and unpacking is rather turgid :-(
+mk_occ :: OccName.NameSpace -> TH.OccName -> OccName.OccName
+mk_occ ns occ = OccName.mkOccFS ns (mkFastString (TH.occString occ))
+
+mk_mod :: TH.ModName -> Module
+mk_mod mod = mkModule (TH.modString mod)
+
+mk_uniq :: Int# -> Unique
+mk_uniq u = mkUniqueGrimily (I# u)
\end{code}
+
projects / ghc-hetmet.git / blobdiff