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|
----------------------------------------------------------------------
-- |
-- Module : GrammarToSource
-- Maintainer : AR
-- Stability : (stable)
-- Portability : (portable)
--
-- > CVS $Date: 2005/10/04 11:05:07 $
-- > CVS $Author: aarne $
-- > CVS $Revision: 1.23 $
--
-- From internal source syntax to BNFC-generated (used for printing).
-----------------------------------------------------------------------------
module GF.Source.GrammarToSource ( trGrammar,
trModule,
trAnyDef,
trLabel,
trt, tri, trp
) where
import GF.Data.Operations
import GF.Grammar.Grammar
import GF.Grammar.Predef
import GF.Infra.Modules
import GF.Infra.Option
import qualified GF.Source.AbsGF as P
import GF.Infra.Ident
import qualified Data.ByteString.Char8 as BS
-- | AR 13\/5\/2003
--
-- translate internal to parsable and printable source
trGrammar :: SourceGrammar -> P.Grammar
trGrammar (MGrammar ms) = P.Gr (map trModule ms) -- no includes
trModule :: (Ident,SourceModInfo) -> P.ModDef
trModule (i,m) = P.MModule compl typ body
where
compl = case mstatus m of
MSIncomplete -> P.CMIncompl
_ -> P.CMCompl
i' = tri i
typ = case mtype m of
MTResource -> P.MTResource i'
MTAbstract -> P.MTAbstract i'
MTConcrete a -> P.MTConcrete i' (tri a)
MTTransfer a b -> P.MTTransfer i' (trOpen a) (trOpen b)
MTInstance a -> P.MTInstance i' (tri a)
MTInterface -> P.MTInterface i'
body = P.MBody
(trExtends (extend m))
(mkOpens (map trOpen (opens m)))
(mkTopDefs (concatMap trAnyDef (tree2list (jments m)) ++ trFlags (flags m)))
trExtends :: [(Ident,MInclude Ident)] -> P.Extend
trExtends [] = P.NoExt
trExtends es = (P.Ext $ map tre es) where
tre (i,c) = case c of
MIAll -> P.IAll (tri i)
MIOnly is -> P.ISome (tri i) (map tri is)
MIExcept is -> P.IMinus (tri i) (map tri is)
---- this has to be completed with other mtys
forName (MTConcrete a) = tri a
trOpen :: OpenSpec Ident -> P.Open
trOpen o = case o of
OSimple i -> P.OName (tri i)
OQualif i j -> P.OQual P.QOCompl (tri i) (tri j)
mkOpens ds = if null ds then P.NoOpens else P.OpenIn ds
mkTopDefs ds = ds
trAnyDef :: (Ident,Info) -> [P.TopDef]
trAnyDef (i,info) = let i' = tri i in case info of
AbsCat (Just co) pd -> [P.DefCat [P.SimpleCatDef i' (map trDecl co)]]
AbsFun (Just ty) Nothing -> [P.DefFunData [P.FunDef [i'] (trt ty)]]
AbsFun (Just ty) (Just eqs) -> [P.DefFun [P.FunDef [i'] (trt ty)]] ++
[P.DefDef [P.DPatt (mkName i') (map trp patts) (trt res)] | (patts,res) <- eqs]
ResOper pty ptr -> [P.DefOper [trDef i' pty ptr]]
ResParam pp -> [P.DefPar [case pp of
Just (ps,_) -> P.ParDefDir i' [P.ParConstr (tri c) (map trDecl co) | (c,co) <- ps]
Nothing -> P.ParDefAbs i']]
ResOverload os tysts ->
[P.DefOper [P.DDef [mkName i'] (
foldl P.EApp
(P.EIdent $ tri $ cOverload)
(map (P.EIdent . tri) os ++
[P.ERecord [P.LDFull [i'] (trt ty) (trt fu) | (ty,fu) <- tysts]]))]]
CncCat (Just ty) Nothing _ ->
[P.DefLincat [P.PrintDef [mkName i'] (trt ty)]]
CncCat pty ptr ppr ->
[P.DefLindef [trDef i' pty ptr]] ++
[P.DefPrintCat [P.PrintDef [mkName i'] (trt pr)] | Just pr <- [ppr]]
CncFun _ ptr ppr ->
[P.DefLin [trDef i' Nothing ptr]] ++
[P.DefPrintFun [P.PrintDef [mkName i'] (trt pr)] | Just pr <- [ppr]]
_ -> []
trDef :: P.PIdent -> Maybe Type -> Maybe Term -> P.Def
trDef i pty ptr = case (pty,ptr) of
(Nothing, Nothing) -> P.DDef [mkName i] (P.EMeta) ---
(_, Nothing) -> P.DDecl [mkName i] (maybe P.EMeta trt pty)
(Nothing, _ ) -> P.DDef [mkName i] (maybe P.EMeta trt ptr)
(_, _ ) -> P.DFull [mkName i] (maybe P.EMeta trt pty) (maybe P.EMeta trt ptr)
trFlags :: Options -> [P.TopDef]
trFlags = map trFlag . optionsGFO
trFlag :: (String,String) -> P.TopDef
trFlag (f,x) = P.DefFlag [P.FlagDef (tri $ identC (BS.pack f)) (tri $ identC (BS.pack x))]
trt :: Term -> P.Exp
trt trm = case trm of
Vr s -> P.EIdent $ tri s
Cn s -> P.ECons $ tri s
Con s -> P.EConstr $ tri s
Sort s -> P.ESort $! if s == cType then P.Sort_Type else
if s == cPType then P.Sort_PType else
if s == cTok then P.Sort_Tok else
if s == cStr then P.Sort_Str else
if s == cStrs then P.Sort_Strs else
error $ "not yet sort " +++ show trm
App c a -> P.EApp (trt c) (trt a)
Abs x b -> P.EAbstr [trb x] (trt b)
Meta m -> P.EMeta
Prod x a b | isWildIdent x -> P.EProd (P.DExp (trt a)) (trt b)
Prod x a b -> P.EProd (P.DDec [trb x] (trt a)) (trt b)
Example t s -> P.EExample (trt t) s
R [] -> P.ETuple [] --- to get correct parsing when read back
R r -> P.ERecord $ map trAssign r
RecType r -> P.ERecord $ map trLabelling r
ExtR x y -> P.EExtend (trt x) (trt y)
P t l -> P.EProj (trt t) (trLabel l)
PI t l _ -> P.EProj (trt t) (trLabel l)
Q t l -> P.EQCons (tri t) (tri l)
QC t l -> P.EQConstr (tri t) (tri l)
TSh (TComp ty) cc -> P.ETTable (trt ty) (map trCases cc)
TSh (TTyped ty) cc -> P.ETTable (trt ty) (map trCases cc)
TSh (TWild ty) cc -> P.ETTable (trt ty) (map trCases cc)
T (TTyped ty) cc -> P.ETTable (trt ty) (map trCase cc)
T (TComp ty) cc -> P.ETTable (trt ty) (map trCase cc)
T (TWild ty) cc -> P.ETTable (trt ty) (map trCase cc)
T _ cc -> P.ETable (map trCase cc)
V ty cc -> P.EVTable (trt ty) (map trt cc)
Table x v -> P.ETType (trt x) (trt v)
S f x -> P.ESelect (trt f) (trt x)
---- Alias c a t -> "{-" +++ prt c +++ "=" +++ "-}" +++ prt t
-- Alias c a t -> prt (Let (c,(Just a,t)) (Vr c)) -- thus Alias is only internal
Let (x,(ma,b)) t ->
P.ELet [maybe (P.LDDef x' b') (\ty -> P.LDFull x' (trt ty) b') ma] (trt t)
where
b' = trt b
x' = [tri x]
Empty -> P.EEmpty
K [] -> P.EEmpty
K a -> P.EString a
C a b -> P.EConcat (trt a) (trt b)
EInt i -> P.EInt i
EFloat i -> P.EFloat i
EPatt p -> P.EPatt (trp p)
EPattType t -> P.EPattType (trt t)
Glue a b -> P.EGlue (trt a) (trt b)
Alts (t, tt) -> P.EPre (trt t) [P.Alt (trt v) (trt c) | (v,c) <- tt]
FV ts -> P.EVariants $ map trt ts
Strs tt -> P.EStrs $ map trt tt
Val te _ _ -> trt te ----
_ -> error $ "not yet" +++ show trm ----
trp :: Patt -> P.Patt
trp p = case p of
PW -> P.PW
PV s -> P.PV $ tri s
PC c [] -> P.PCon $ tri c
PC c a -> P.PC (tri c) (map trp a)
PP p c [] -> P.PQ (tri p) (tri c)
PP p c a -> P.PQC (tri p) (tri c) (map trp a)
PR r -> P.PR [P.PA [tri $ label2ident l] (trp p) | (l,p) <- r]
PString s -> P.PStr s
PInt i -> P.PInt i
PFloat i -> P.PFloat i
PT t p -> trp p ---- prParenth (prt p +++ ":" +++ prt t)
PAs x p -> P.PAs (tri x) (trp p)
PAlt p q -> P.PDisj (trp p) (trp q)
PSeq p q -> P.PSeq (trp p) (trp q)
PRep p -> P.PRep (trp p)
PNeg p -> P.PNeg (trp p)
PChar -> P.PChar
PChars s -> P.PChars s
PM m c -> P.PM (tri m) (tri c)
PVal p _ _ -> trp p ----
trAssign (lab, (mty, t)) = maybe (P.LDDef x t') (\ty -> P.LDFull x (trt ty) t') mty
where
t' = trt t
x = [tri $ label2ident lab]
trLabelling (lab,ty) = P.LDDecl [tri $ label2ident lab] (trt ty)
trCase (patt, trm) = P.Case (trp patt) (trt trm)
trCases (patts,trm) = P.Case (foldl1 P.PDisj (map trp patts)) (trt trm)
trDecl (x,ty) = P.DDDec [trb x] (trt ty)
tri :: Ident -> P.PIdent
tri = ppIdent . ident2bs
ppIdent i = P.PIdent ((0,0),i)
trb i = if isWildIdent i then P.BWild else P.BIdent (tri i)
trLabel :: Label -> P.Label
trLabel i = case i of
LIdent s -> P.LIdent $ ppIdent s
LVar i -> P.LVar $ toInteger i
mkName :: P.PIdent -> P.Name
mkName = P.IdentName
|
