forked from GitHub/gf-core
native representation for HOAS in PMCFG and incremental type checking of the parse forest
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krasimir
@@ -23,7 +23,7 @@ import qualified Data.Set as Set
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-- | Linearizes given expression as string in the language
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linearize :: PGF -> Language -> Tree -> String
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linearize pgf lang = concat . take 1 . map (unwords . concatMap flattenBracketedString . snd . untokn "" . (!0)) . linTree pgf lang
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linearize pgf lang = concat . take 1 . map (unwords . concatMap flattenBracketedString . snd . untokn "" . firstLin) . linTree pgf lang
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-- | The same as 'linearizeAllLang' but does not return
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-- the language.
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@@ -37,101 +37,86 @@ linearizeAllLang pgf t = [(lang,linearize pgf lang t) | lang <- Map.keys (concre
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-- | Linearizes given expression as a bracketed string in the language
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bracketedLinearize :: PGF -> Language -> Tree -> BracketedString
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bracketedLinearize pgf lang = head . concat . map (snd . untokn "" . (!0)) . linTree pgf lang
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bracketedLinearize pgf lang = head . concat . map (snd . untokn "" . firstLin) . linTree pgf lang
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where
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head [] = error "cannot linearize"
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head (bs:bss) = bs
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firstLin (_,arr)
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| inRange (bounds arr) 0 = arr ! 0
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| otherwise = LeafKS []
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-- | Creates a table from feature name to linearization.
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-- The outher list encodes the variations
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tabularLinearizes :: PGF -> CId -> Expr -> [[(String,String)]]
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tabularLinearizes pgf lang e = map (zip lbls . map (unwords . concatMap flattenBracketedString . snd . untokn "") . elems)
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(linTree pgf lang e)
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tabularLinearizes pgf lang e = map cnv (linTree pgf lang e)
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where
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lbls = case unApp e of
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Just (f,_) -> let cat = valCat (lookType pgf f)
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in case Map.lookup cat (cnccats (lookConcr pgf lang)) of
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Just (CncCat _ _ lbls) -> elems lbls
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Nothing -> error "No labels"
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Nothing -> error "Not function application"
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cnv ((cat,_),lin) = zip (lbls cat) $ map (unwords . concatMap flattenBracketedString . snd . untokn "") (elems lin)
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lbls cat = case Map.lookup cat (cnccats (lookConcr pgf lang)) of
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Just (CncCat _ _ lbls) -> elems lbls
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Nothing -> error "No labels"
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--------------------------------------------------------------------
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-- Implementation
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--------------------------------------------------------------------
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type CncType = (CId, FId) -- concrete type is the abstract type (the category) + the forest id
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linTree :: PGF -> Language -> Expr -> [Array LIndex BracketedTokn]
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linTree :: PGF -> Language -> Expr -> [(CncType, Array LIndex BracketedTokn)]
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linTree pgf lang e =
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nub [amapWithIndex (\label -> Bracket_ cat fid label [e]) lin | (_,((cat,fid),e,lin)) <- lin0 [] [] Nothing 0 e e]
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nub [(ct,amapWithIndex (\label -> Bracket_ cat fid label es) lin) | (_,(ct@(cat,fid),es,(xs,lin))) <- lin Nothing 0 e [] [] e []]
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where
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cnc = lookMap (error "no lang") lang (concretes pgf)
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lp = lproductions cnc
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lin0 xs ys mb_cty n_fid e0 (EAbs _ x e) = lin0 (showCId x:xs) ys mb_cty n_fid e0 e
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lin0 xs ys mb_cty n_fid e0 (ETyped e _) = lin0 xs ys mb_cty n_fid e0 e
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lin0 xs ys mb_cty n_fid e0 e | null xs = lin ys mb_cty n_fid e0 e []
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| otherwise = apply (xs ++ ys) mb_cty n_fid e0 _B (e:[ELit (LStr x) | x <- xs])
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lin xs mb_cty n_fid e0 (EApp e1 e2) es = lin xs mb_cty n_fid e0 e1 (e2:es)
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lin xs mb_cty n_fid e0 (ELit l) [] = case l of
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LStr s -> return (n_fid+1,((cidString,n_fid),e0,ss s))
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LInt n -> return (n_fid+1,((cidInt, n_fid),e0,ss (show n)))
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LFlt f -> return (n_fid+1,((cidFloat, n_fid),e0,ss (show f)))
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lin xs mb_cty n_fid e0 (EMeta i) es = apply xs mb_cty n_fid e0 _V (ELit (LStr ('?':show i)):es)
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lin xs mb_cty n_fid e0 (EFun f) es = apply xs mb_cty n_fid e0 f es
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lin xs mb_cty n_fid e0 (EVar i) es = apply xs mb_cty n_fid e0 _V (ELit (LStr (xs !! i)) :es)
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lin xs mb_cty n_fid e0 (ETyped e _) es = lin xs mb_cty n_fid e0 e es
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lin xs mb_cty n_fid e0 (EImplArg e) es = lin xs mb_cty n_fid e0 e es
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lin mb_cty n_fid e0 ys xs (EAbs _ x e) es = lin mb_cty n_fid e0 ys (x:xs) e es
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lin mb_cty n_fid e0 ys xs (EApp e1 e2) es = lin mb_cty n_fid e0 ys xs e1 (e2:es)
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lin mb_cty n_fid e0 ys xs (EImplArg e) es = lin mb_cty n_fid e0 ys xs e es
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lin mb_cty n_fid e0 ys xs (ETyped e _) es = lin mb_cty n_fid e0 ys xs e es
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lin mb_cty n_fid e0 ys xs (EFun f) es = apply mb_cty n_fid e0 ys xs f es
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lin mb_cty n_fid e0 ys xs (EMeta i) es = def mb_cty n_fid e0 ys xs ('?':show i)
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lin mb_cty n_fid e0 ys xs (EVar i) [] = def mb_cty n_fid e0 ys xs (showCId ((xs++ys) !! i))
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lin mb_cty n_fid e0 ys xs (ELit l) [] = case l of
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LStr s -> return (n_fid+1,((cidString,n_fid),[e0],([],ss s)))
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LInt n -> return (n_fid+1,((cidInt, n_fid),[e0],([],ss (show n))))
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LFlt f -> return (n_fid+1,((cidFloat, n_fid),[e0],([],ss (show f))))
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ss s = listArray (0,0) [[LeafKS [s]]]
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apply :: [String] -> Maybe CncType -> FId -> Expr -> CId -> [Expr] -> [(FId,(CncType, Expr, LinTable))]
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apply xs mb_cty n_fid e0 f es =
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apply :: Maybe CncType -> FId -> Expr -> [CId] -> [CId] -> CId -> [Expr] -> [(FId,(CncType, [Expr], LinTable))]
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apply mb_cty n_fid e0 ys xs f es =
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case Map.lookup f lp of
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Just prods -> do (funid,(cat,fid),ctys) <- getApps prods
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guard (length ctys == length es)
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(n_fid,args) <- descend n_fid (zip ctys es)
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let (CncFun _ lins) = cncfuns cnc ! funid
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return (n_fid+1,((cat,n_fid),e0,listArray (bounds lins) [computeSeq seqid args | seqid <- elems lins]))
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Nothing -> apply xs mb_cty n_fid e0 _V [ELit (LStr ("[" ++ showCId f ++ "]"))] -- fun without lin
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return (n_fid+1,((cat,n_fid),[e0],mkLinTable cnc (const True) xs funid args))
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Nothing -> def mb_cty n_fid e0 ys xs ("[" ++ showCId f ++ "]") -- fun without lin
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where
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getApps prods =
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case mb_cty of
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Just cty@(cat,fid) -> maybe [] (concatMap (toApp cty) . Set.toList) (IntMap.lookup fid prods)
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Nothing | f == _B
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|| f == _V -> []
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| otherwise -> concat [toApp (wildCId,fid) prod | (fid,set) <- IntMap.toList prods, prod <- Set.toList set]
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Just (cat,fid) -> maybe [] (concatMap (toApp fid) . Set.toList) (IntMap.lookup fid prods)
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Nothing -> concat [toApp fid prod | (fid,set) <- IntMap.toList prods, prod <- Set.toList set]
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where
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toApp cty (PApply funid fids)
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| f == _V = [(funid,cty,zip ( repeat cidVar) fids)]
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| f == _B = [(funid,cty,zip (fst cty : repeat cidVar) fids)]
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| otherwise = let Just (ty,_,_) = Map.lookup f (funs (abstract pgf))
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(args,res) = catSkeleton ty
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in [(funid,(res,snd cty),zip args fids)]
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toApp cty (PCoerce fid) = concatMap (toApp cty) (maybe [] Set.toList (IntMap.lookup fid prods))
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toApp fid (PApply funid pargs) =
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let Just (ty,_,_) = Map.lookup f (funs (abstract pgf))
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(args,res) = catSkeleton ty
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in [(funid,(res,fid),zip args [fid | PArg _ fid <- pargs])]
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toApp _ (PCoerce fid) =
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maybe [] (concatMap (toApp fid) . Set.toList) (IntMap.lookup fid prods)
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descend n_fid [] = return (n_fid,[])
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descend n_fid (((cat,fid),e):fes) = do (n_fid,arg) <- lin0 [] xs (Just (cat,fid)) n_fid e e
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(n_fid,args) <- descend n_fid fes
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return (n_fid,arg:args)
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descend n_fid [] = return (n_fid,[])
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descend n_fid ((cty,e):fes) = do (n_fid,arg) <- lin (Just cty) n_fid e (xs++ys) [] e []
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(n_fid,args) <- descend n_fid fes
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return (n_fid,arg:args)
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computeSeq :: SeqId -> [(CncType,Expr,LinTable)] -> [BracketedTokn]
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computeSeq seqid args = concatMap compute (elems seq)
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where
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seq = sequences cnc ! seqid
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compute (SymCat d r) = getArg d r
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compute (SymLit d r) = getArg d r
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compute (SymKS ts) = [LeafKS ts]
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compute (SymKP ts alts) = [LeafKP ts alts]
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getArg d r
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| not (null arg_lin) = [Bracket_ cat fid r [e] arg_lin]
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| otherwise = arg_lin
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where
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arg_lin = lin ! r
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((cat,fid),e,lin) = args !! d
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def (Just (cat,fid)) n_fid e0 ys xs s =
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case IntMap.lookup fid (lindefs cnc) of
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Just funs -> do funid <- funs
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let args = [((wildCId, n_fid),[e0],([],ss s))]
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return (n_fid+2,((cat,n_fid+1),[e0],mkLinTable cnc (const True) xs funid args))
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Nothing
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| isPredefFId fid -> return (n_fid+2,((cat,n_fid+1),[e0],(xs,listArray (0,0) [[LeafKS [s]]])))
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| otherwise -> do PCoerce fid <- maybe [] Set.toList (IntMap.lookup fid (pproductions cnc))
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def (Just (cat,fid)) n_fid e0 ys xs s
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def Nothing n_fid e0 ys xs s = []
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amapWithIndex :: (IArray a e1, IArray a e2, Ix i) => (i -> e1 -> e2) -> a i e1 -> a i e2
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amapWithIndex f arr = listArray (bounds arr) (map (uncurry f) (assocs arr))
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