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https://github.com/GrammaticalFramework/gf-core.git
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255 lines
8.1 KiB
Haskell
255 lines
8.1 KiB
Haskell
----------------------------------------------------------------------
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-- |
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-- Module : GrammarToSource
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-- Maintainer : AR
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-- Stability : (stable)
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-- Portability : (portable)
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--
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-- > CVS $Date: 2005/10/04 11:05:07 $
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-- > CVS $Author: aarne $
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-- > CVS $Revision: 1.23 $
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--
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-- From internal source syntax to BNFC-generated (used for printing).
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-----------------------------------------------------------------------------
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module GF.Source.GrammarToSource ( trGrammar,
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trModule,
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trAnyDef,
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trLabel,
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trt, tri, trp
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) where
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import GF.Data.Operations
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import GF.Grammar.Grammar
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import GF.Infra.Modules
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import GF.Infra.Option
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import qualified GF.Source.AbsGF as P
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import GF.Infra.Ident
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-- | AR 13\/5\/2003
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--
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-- translate internal to parsable and printable source
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trGrammar :: SourceGrammar -> P.Grammar
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trGrammar (MGrammar ms) = P.Gr (map trModule ms) -- no includes
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trModule :: (Ident,SourceModInfo) -> P.ModDef
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trModule (i,mo) = case mo of
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ModMod m -> P.MModule compl typ body where
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compl = case mstatus m of
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MSIncomplete -> P.CMIncompl
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_ -> P.CMCompl
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i' = tri i
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typ = case typeOfModule mo of
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MTResource -> P.MTResource i'
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MTAbstract -> P.MTAbstract i'
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MTConcrete a -> P.MTConcrete i' (tri a)
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MTTransfer a b -> P.MTTransfer i' (trOpen a) (trOpen b)
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MTInstance a -> P.MTInstance i' (tri a)
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MTInterface -> P.MTInterface i'
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body = P.MBody
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(trExtends (extend m))
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(mkOpens (map trOpen (opens m)))
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(mkTopDefs (concatMap trAnyDef (tree2list (jments m)) ++ map trFlag (flags m)))
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trExtends :: [(Ident,MInclude Ident)] -> P.Extend
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trExtends [] = P.NoExt
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trExtends es = (P.Ext $ map tre es) where
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tre (i,c) = case c of
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MIAll -> P.IAll (tri i)
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MIOnly is -> P.ISome (tri i) (map tri is)
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MIExcept is -> P.IMinus (tri i) (map tri is)
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---- this has to be completed with other mtys
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forName (MTConcrete a) = tri a
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trOpen :: OpenSpec Ident -> P.Open
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trOpen o = case o of
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OSimple OQNormal i -> P.OName (tri i)
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OSimple q i -> P.OQualQO (trQualOpen q) (tri i)
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OQualif q i j -> P.OQual (trQualOpen q) (tri i) (tri j)
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trQualOpen q = case q of
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OQNormal -> P.QOCompl
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OQIncomplete -> P.QOIncompl
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OQInterface -> P.QOInterface
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mkOpens ds = if null ds then P.NoOpens else P.OpenIn ds
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mkTopDefs ds = ds
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trAnyDef :: (Ident,Info) -> [P.TopDef]
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trAnyDef (i,info) = let i' = tri i in case info of
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AbsCat (Yes co) pd -> [P.DefCat [P.SimpleCatDef i' (map trDecl co)]]
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AbsFun (Yes ty) (Yes EData) -> [P.DefFunData [P.FunDef [i'] (trt ty)]]
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AbsFun (Yes ty) pt -> [P.DefFun [P.FunDef [i'] (trt ty)]] ++ case pt of
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Yes t -> [P.DefDef [P.DDef [mkName i'] (trt t)]]
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_ -> []
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AbsFun (May b) _ -> [P.DefFun [P.FunDef [i'] (P.EIndir (tri b))]]
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---- don't destroy definitions!
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AbsTrans f -> [P.DefTrans [P.DDef [mkName i'] (trt f)]]
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ResOper pty ptr -> [P.DefOper [trDef i' pty ptr]]
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ResParam pp -> [P.DefPar [case pp of
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Yes (ps,_) -> P.ParDefDir i' [P.ParConstr (tri c) (map trDecl co) | (c,co) <- ps]
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May b -> P.ParDefIndir i' $ tri b
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_ -> P.ParDefAbs i']]
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ResOverload tysts ->
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[P.DefOper [P.DDef [mkName i'] (
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P.EApp (P.EIdent $ identC "overload")
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(P.ERecord [P.LDFull [i'] (trt ty) (trt fu) | (ty,fu) <- tysts]))]]
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CncCat (Yes ty) Nope _ ->
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[P.DefLincat [P.PrintDef [mkName i'] (trt ty)]]
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CncCat pty ptr ppr ->
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[P.DefLindef [trDef i' pty ptr]] ++
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[P.DefPrintCat [P.PrintDef [mkName i] (trt pr)] | Yes pr <- [ppr]]
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CncFun _ ptr ppr ->
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[P.DefLin [trDef i' nope ptr]] ++
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[P.DefPrintFun [P.PrintDef [mkName i] (trt pr)] | Yes pr <- [ppr]]
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{-
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---- encoding of AnyInd without changing syntax. AR 20/9/2007
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AnyInd s b ->
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[P.DefOper [P.DDef [mkName i]
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(P.EApp (P.EInt (if s then 1 else 0)) (P.EIdent (tri b)))]]
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-}
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_ -> []
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trDef :: Ident -> Perh Type -> Perh Term -> P.Def
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trDef i pty ptr = case (pty,ptr) of
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(Nope, Nope) -> P.DDef [mkName i] (P.EMeta) ---
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(_, Nope) -> P.DDecl [mkName i] (trPerh pty)
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(Nope, _ ) -> P.DDef [mkName i] (trPerh ptr)
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(_, _ ) -> P.DFull [mkName i] (trPerh pty) (trPerh ptr)
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trPerh p = case p of
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Yes t -> trt t
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May b -> P.EIndir $ tri b
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_ -> P.EMeta ---
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trFlag :: Option -> P.TopDef
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trFlag o = case o of
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Opt (f,[x]) -> P.DefFlag [P.FlagDef (identC f) (identC x)]
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_ -> P.DefFlag [] --- warning?
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trt :: Term -> P.Exp
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trt trm = case trm of
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Vr s -> P.EIdent $ tri s
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Cn s -> P.ECons $ tri s
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Con s -> P.EConstr $ tri s
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Sort s -> P.ESort $ case s of
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"Type" -> P.Sort_Type
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"PType" -> P.Sort_PType
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"Tok" -> P.Sort_Tok
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"Str" -> P.Sort_Str
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"Strs" -> P.Sort_Strs
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_ -> error $ "not yet sort " +++ show trm ----
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App c a -> P.EApp (trt c) (trt a)
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Abs x b -> P.EAbstr [trb x] (trt b)
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Eqs pts -> P.EEqs [P.Equ (map trp ps) (trt t) | (ps,t) <- pts]
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Meta m -> P.EMeta
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Prod x a b | isWildIdent x -> P.EProd (P.DExp (trt a)) (trt b)
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Prod x a b -> P.EProd (P.DDec [trb x] (trt a)) (trt b)
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Example t s -> P.EExample (trt t) s
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R [] -> P.ETuple [] --- to get correct parsing when read back
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R r -> P.ERecord $ map trAssign r
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RecType r -> P.ERecord $ map trLabelling r
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ExtR x y -> P.EExtend (trt x) (trt y)
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P t l -> P.EProj (trt t) (trLabel l)
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PI t l _ -> P.EProj (trt t) (trLabel l)
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Q t l -> P.EQCons (tri t) (tri l)
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QC t l -> P.EQConstr (tri t) (tri l)
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TSh (TComp ty) cc -> P.ETTable (trt ty) (map trCases cc)
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TSh (TTyped ty) cc -> P.ETTable (trt ty) (map trCases cc)
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TSh (TWild ty) cc -> P.ETTable (trt ty) (map trCases cc)
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T (TTyped ty) cc -> P.ETTable (trt ty) (map trCase cc)
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T (TComp ty) cc -> P.ETTable (trt ty) (map trCase cc)
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T (TWild ty) cc -> P.ETTable (trt ty) (map trCase cc)
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T _ cc -> P.ETable (map trCase cc)
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V ty cc -> P.EVTable (trt ty) (map trt cc)
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Table x v -> P.ETType (trt x) (trt v)
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S f x -> P.ESelect (trt f) (trt x)
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---- Alias c a t -> "{-" +++ prt c +++ "=" +++ "-}" +++ prt t
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-- Alias c a t -> prt (Let (c,(Just a,t)) (Vr c)) -- thus Alias is only internal
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Let (x,(ma,b)) t ->
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P.ELet [maybe (P.LDDef x' b') (\ty -> P.LDFull x' (trt ty) b') ma] (trt t)
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where
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b' = trt b
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x' = [tri x]
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Empty -> P.EEmpty
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K [] -> P.EEmpty
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K a -> P.EString a
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C a b -> P.EConcat (trt a) (trt b)
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EInt i -> P.EInt i
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EFloat i -> P.EFloat i
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Glue a b -> P.EGlue (trt a) (trt b)
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Alts (t, tt) -> P.EPre (trt t) [P.Alt (trt v) (trt c) | (v,c) <- tt]
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FV ts -> P.EVariants $ map trt ts
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Strs tt -> P.EStrs $ map trt tt
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EData -> P.EData
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_ -> error $ "not yet" +++ show trm ----
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trp :: Patt -> P.Patt
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trp p = case p of
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PW -> P.PW
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PV s | isWildIdent s -> P.PW
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PV s -> P.PV $ tri s
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PC c [] -> P.PCon $ tri c
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PC c a -> P.PC (tri c) (map trp a)
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PP p c [] -> P.PQ (tri p) (tri c)
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PP p c a -> P.PQC (tri p) (tri c) (map trp a)
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PR r -> P.PR [P.PA [trLabelIdent l] (trp p) | (l,p) <- r]
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PString s -> P.PStr s
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PInt i -> P.PInt i
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PFloat i -> P.PFloat i
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PT t p -> trp p ---- prParenth (prt p +++ ":" +++ prt t)
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PAs x p -> P.PAs (tri x) (trp p)
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PAlt p q -> P.PDisj (trp p) (trp q)
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PSeq p q -> P.PSeq (trp p) (trp q)
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PRep p -> P.PRep (trp p)
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PNeg p -> P.PNeg (trp p)
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PChar -> P.PV (IC "C_") ---- temporary encoding
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trAssign (lab, (mty, t)) = maybe (P.LDDef x t') (\ty -> P.LDFull x (trt ty) t') mty
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where
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t' = trt t
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x = [trLabelIdent lab]
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trLabelling (lab,ty) = P.LDDecl [trLabelIdent lab] (trt ty)
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trCase (patt, trm) = P.Case (trp patt) (trt trm)
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trCases (patts,trm) = P.Case (foldl1 P.PDisj (map trp patts)) (trt trm)
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trDecl (x,ty) = P.DDDec [trb x] (trt ty)
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tri :: Ident -> Ident
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tri i = case prIdent i of
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s@('_':_:_) -> identC $ 'h':s ---- unsafe; needed since _3 etc are generated
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s -> identC $ s
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trb i = if isWildIdent i then P.BWild else P.BIdent (tri i)
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trLabel :: Label -> P.Label
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trLabel i = case i of
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LIdent s -> P.LIdent $ identC s
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LVar i -> P.LVar $ toInteger i
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trLabelIdent i = identC $ case i of
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LIdent s -> s
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LVar i -> "v" ++ show i --- should not happen
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mkName :: Ident -> P.Name
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mkName = P.IdentName
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