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|
----------------------------------------------------------------------
-- |
-- Module : GrammarToSource
-- Maintainer : AR
-- Stability : (stable)
-- Portability : (portable)
--
-- > CVS $Date: 2005/02/24 11:46:38 $
-- > CVS $Author: peb $
-- > CVS $Revision: 1.17 $
--
-- From internal source syntax to BNFC-generated (used for printing).
-----------------------------------------------------------------------------
module GrammarToSource ( trGrammar,
trModule,
trAnyDef,
trLabel,
trt, tri, trp
) where
import Operations
import Grammar
import Modules
import Option
import qualified AbsGF as P
import Ident
-- | 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,mo) = case mo of
ModMod m -> P.MModule compl typ body where
compl = P.CMCompl -- always complete module
i' = tri i
typ = case typeOfModule mo 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
(trExtend (extends m))
(mkOpens (map trOpen (opens m)))
(mkTopDefs (concatMap trAnyDef (tree2list (jments m)) ++ map trFlag (flags m)))
trExtend :: [Ident] -> P.Extend
trExtend i = ifNull P.NoExt (P.Ext . map tri) i
---- this has to be completed with other mtys
forName (MTConcrete a) = tri a
trOpen :: OpenSpec Ident -> P.Open
trOpen o = case o of
OSimple OQNormal i -> P.OName (tri i)
OSimple q i -> P.OQualQO (trQualOpen q) (tri i)
OQualif q i j -> P.OQual (trQualOpen q) (tri i) (tri j)
trQualOpen q = case q of
OQNormal -> P.QOCompl
OQIncomplete -> P.QOIncompl
OQInterface -> P.QOInterface
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 (Yes co) pd -> [P.DefCat [P.CatDef i' (map trDecl co)]] ++ case pd of
Yes fs -> [P.DefData [P.DataDef i' [P.DataQId (tri m) (tri c) | QC m c <- fs]]]
_ -> []
AbsFun (Yes ty) pt -> [P.DefFun [P.FunDef [i'] (trt ty)]] ++ case pt of
Yes EData -> [] -- keep this information in data defs only
Yes t -> [P.DefDef [P.DDef [i'] (trt t)]]
_ -> []
AbsFun (May b) _ -> [P.DefFun [P.FunDef [i'] (P.EIndir (tri b))]]
---- don't destroy definitions!
AbsTrans f -> [P.DefTrans [P.DDef [i'] (trt f)]]
ResOper pty ptr -> [P.DefOper [trDef i' pty ptr]]
ResParam pp -> [P.DefPar [case pp of
Yes ps -> P.ParDefDir i' [P.ParConstr (tri c) (map trDecl co) | (c,co) <- ps]
May b -> P.ParDefIndir i' $ tri b
_ -> P.ParDefAbs i']]
CncCat (Yes ty) Nope _ ->
[P.DefLincat [P.PrintDef [i'] (trt ty)]]
CncCat pty ptr ppr ->
[P.DefLindef [trDef i' pty ptr]]
---- P.DefPrintCat [P.PrintDef i' (trt pr)]]
CncFun _ ptr ppr ->
[P.DefLin [trDef i' nope ptr]]
---- P.DefPrintFun [P.PrintDef i' (trt pr)]]
_ -> []
trDef :: Ident -> Perh Type -> Perh Term -> P.Def
trDef i pty ptr = case (pty,ptr) of
(Nope, Nope) -> P.DDef [i] (P.EMeta) ---
(_, Nope) -> P.DDecl [i] (trPerh pty)
(Nope, _ ) -> P.DDef [i] (trPerh ptr)
(_, _ ) -> P.DFull [i] (trPerh pty) (trPerh ptr)
trPerh p = case p of
Yes t -> trt t
May b -> P.EIndir $ tri b
_ -> P.EMeta ---
trFlag :: Option -> P.TopDef
trFlag o = case o of
Opt (f,[x]) -> P.DefFlag [P.FlagDef (identC f) (identC x)]
_ -> P.DefFlag [] --- warning?
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 $ case s of
"Type" -> P.Sort_Type
"PType" -> P.Sort_PType
"Tok" -> P.Sort_Tok
"Str" -> P.Sort_Str
"Strs" -> P.Sort_Strs
_ -> error $ "not yet sort " +++ show trm ----
App c a -> P.EApp (trt c) (trt a)
Abs x b -> P.EAbstr [trb x] (trt b)
Eqs pts -> P.EEqs [P.Equ (map trp ps) (trt t) | (ps,t) <- pts]
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)
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)
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)
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 $ toInteger i
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
EData -> P.EData
_ -> error $ "not yet" +++ show trm ----
trp :: Patt -> P.Patt
trp p = case p of
PW -> P.PW
PV s | isWildIdent s -> 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 [trLabelIdent l] (trp p) | (l,p) <- r]
PString s -> P.PStr s
PInt i -> P.PInt $ toInteger i
PT t p -> trp p ---- prParenth (prt p +++ ":" +++ prt t)
trAssign (lab, (mty, t)) = maybe (P.LDDef x t') (\ty -> P.LDFull x (trt ty) t') mty
where
t' = trt t
x = [trLabelIdent lab]
trLabelling (lab,ty) = P.LDDecl [trLabelIdent lab] (trt ty)
trCase (patt, trm) = P.Case [P.AltP (trp patt)] (trt trm)
trCases (patts,trm) = P.Case (map (P.AltP . trp) patts) (trt trm)
trDecl (x,ty) = P.DDDec [trb x] (trt ty)
tri :: Ident -> Ident
tri i = case prIdent i of
s@('_':_:_) -> identC $ 'h':s ---- unsafe; needed since _3 etc are generated
s -> identC $ s
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 $ identC s
LVar i -> P.LVar $ toInteger i
trLabelIdent i = identC $ case i of
LIdent s -> s
LVar i -> "v" ++ show i --- should not happen
|
