forked from GitHub/gf-core
GF/src is now for 2.9, and the new sources are in src-3.0 - keep it this way until the release of GF 3
This commit is contained in:
aarne
318
src-3.0/GF/Parsing/MCFG/Active.hs
Normal file
318
src-3.0/GF/Parsing/MCFG/Active.hs
Normal file
@@ -0,0 +1,318 @@
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----------------------------------------------------------------------
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-- |
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-- Maintainer : PL
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-- Stability : (stable)
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-- Portability : (portable)
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--
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-- > CVS $Date: 2005/08/08 09:01:25 $
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-- > CVS $Author: peb $
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-- > CVS $Revision: 1.5 $
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--
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-- MCFG parsing, the active algorithm
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-----------------------------------------------------------------------------
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module GF.Parsing.MCFG.Active (parse, parseR) where
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import GF.Data.GeneralDeduction
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import GF.Data.Assoc
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import GF.Formalism.GCFG
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import GF.Formalism.MCFG
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import GF.Formalism.Utilities
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import GF.Parsing.MCFG.Range
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import GF.Parsing.MCFG.PInfo
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import GF.System.Tracing
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import Control.Monad (guard)
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import GF.Infra.Print
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----------------------------------------------------------------------
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-- * parsing
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parse :: (Ord n, Ord c, Ord l, Ord t) => String -> MCFParser c n l t
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parse strategy pinfo starts toks =
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accumAssoc groupSyntaxNodes $
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[ ((cat, found), SNode fun (zip rhs rrecs)) |
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Final (Abs cat rhs fun) found rrecs <- chartLookup chart Fin ]
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where chart = process strategy pinfo starts toks
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-- parseR :: (Ord n, Ord c, Ord l, Ord t) => String -> MCFParser c n l t
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parseR strategy pinfo starts =
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accumAssoc groupSyntaxNodes $
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[ ((cat, found), SNode fun (zip rhs rrecs)) |
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Final (Abs cat rhs fun) found rrecs <- chartLookup chart Fin ]
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where chart = processR strategy pinfo starts
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process :: (Ord n, Ord c, Ord l, Ord t) =>
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String -> MCFPInfo c n l t -> [c] -> Input t -> AChart c n l
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process strategy pinfo starts toks
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= tracePrt "MCFG.Active - chart size" prtSizes $
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buildChart keyof (complete : combine : convert : rules) axioms
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where rules | isNil strategy = [scan]
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| isBU strategy = [scan, predictKilbury pinfo toks]
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| isTD strategy = [scan, predictEarley pinfo toks]
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axioms | isNil strategy = predict pinfo toks
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| isBU strategy = {- terminal pinfo toks ++ -} initialScan pinfo toks
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| isTD strategy = initial pinfo starts toks
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--processR :: (Ord n, Ord c, Ord l) =>
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-- String -> MCFPInfo c n l Range -> [c] -> AChart c n l
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processR strategy pinfo starts
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= tracePrt "MCFG.Active Range - chart size" prtSizes $
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-- tracePrt "MCFG.Active Range - final chart" prtChart $
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buildChart keyof (complete : combine : convert : rules) axioms
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where rules | isNil strategy = [scan]
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| isBU strategy = [scan, predictKilburyR pinfo]
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| isTD strategy = [scan, predictEarleyR pinfo]
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axioms | isNil strategy = predictR pinfo
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| isBU strategy = {- terminalR pinfo ++ -} initialScanR pinfo
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| isTD strategy = initialR pinfo starts
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isNil s = s=="n"
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isBU s = s=="b"
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isTD s = s=="t"
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-- used in prediction
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emptyChildren :: Abstract c n -> [RangeRec l]
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emptyChildren (Abs _ rhs _) = replicate (length rhs) []
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makeMaxRange (Range (_, j)) = Range (j, j)
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makeMaxRange EmptyRange = EmptyRange
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----------------------------------------------------------------------
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-- * inference rules
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-- completion
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complete :: (Ord c, Ord n, Ord l) => AChart c n l -> Item c n l -> [Item c n l]
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complete _ (Active rule found rng (Lin l []) (lin:lins) recs) =
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return $ Active rule (found ++ [(l, rng)]) EmptyRange lin lins recs
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complete _ _ = []
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-- scanning
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scan :: (Ord c, Ord n, Ord l) => AChart c n l -> Item c n l -> [Item c n l]
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scan _ (Active rule found rng (Lin l (Tok rng':syms)) lins recs) =
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do rng'' <- concatRange rng rng'
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return $ Active rule found rng'' (Lin l syms) lins recs
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scan _ _ = []
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-- | Creates an Active Item every time it is possible to combine
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-- an Active Item from the agenda with a Passive Item from the Chart
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combine :: (Ord c, Ord n, Ord l) => AChart c n l -> Item c n l -> [Item c n l]
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combine chart item@(Active _ _ _ (Lin _ (Cat (c,_,_):_)) _ _) =
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do Passive _c found <- chartLookup chart (Pass c)
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combine2 chart found item
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combine chart (Passive c found) =
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do item <- chartLookup chart (Act c)
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combine2 chart found item
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combine _ _ = []
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combine2 chart found' (Active rule found rng (Lin l (Cat (c, r, d):syms)) lins recs) =
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do rng' <- projection r found'
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rng'' <- concatRange rng rng'
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recs' <- unifyRec recs d found'
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return $ Active rule found rng'' (Lin l syms) lins recs'
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-- | Active Items with nothing to find are converted to Final items,
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-- which in turn are converted to Passive Items
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convert :: (Ord c, Ord n, Ord l) => AChart c n l -> Item c n l -> [Item c n l]
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convert _ (Active rule found rng (Lin lbl []) [] recs) =
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return $ Final rule (found ++ [(lbl,rng)]) recs
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convert _ (Final (Abs cat _ _) found _) =
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return $ Passive cat found
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convert _ _ = []
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----------------------------------------------------------------------
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-- Naive --
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predict :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t -> [Item c n l]
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predict pinfo toks = tracePrt "MCFG.Active (Naive) - predicted rules" (prt . length) $
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do (Rule abs (Cnc _ _ lins)) <- rulesMatchingInput pinfo toks
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(lin':lins') <- rangeRestRec toks lins
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return $ Active abs [] EmptyRange lin' lins' (emptyChildren abs)
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----------------------------------------------------------------------
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-- NaiveR --
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predictR :: (Ord c, Ord n, Ord l) => MCFPInfo c n l Range -> [Item c n l]
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predictR pinfo = tracePrt "MCFG.Active (Naive Range) - predicted rules" (prt . length) $
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do (Rule abs (Cnc _ _ (lin:lins))) <- allRules pinfo
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return $ Active abs [] EmptyRange lin lins (emptyChildren abs)
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----------------------------------------------------------------------
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-- Earley --
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-- anropas med alla startkategorier
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initial :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> [c] -> Input t -> [Item c n l]
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initial pinfo starts toks =
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tracePrt "MCFG.Active (Earley) - initial rules" (prt . length) $
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do cat <- starts
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Rule abs (Cnc _ _ lins) <- topdownRules pinfo ? cat
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lin' : lins' <- rangeRestRec toks lins
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return $ Active abs [] (Range (0, 0)) lin' lins' (emptyChildren abs)
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predictEarley :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t
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-> AChart c n l -> Item c n l -> [Item c n l]
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predictEarley pinfo toks _ item@(Active (Abs _ _ f) _ rng (Lin _ (Cat (cat,_,_):_)) _ _) =
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topdownRules pinfo ? cat >>= predictEarley2 toks rng
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predictEarley _ _ _ _ = []
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predictEarley2 :: (Ord c, Ord n, Ord l, Ord t) => Input t -> Range -> MCFRule c n l t -> [Item c n l]
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predictEarley2 toks _ (Rule abs@(Abs _ [] _) (Cnc _ _ lins)) =
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do lins' <- rangeRestRec toks lins
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return $ Final abs (makeRangeRec lins') []
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predictEarley2 toks rng (Rule abs (Cnc _ _ lins)) =
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do lin' : lins' <- rangeRestRec toks lins
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return $ Active abs [] EmptyRange lin' lins' (emptyChildren abs)
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----------------------------------------------------------------------
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-- Earley Range --
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initialR :: (Ord c, Ord n, Ord l) => MCFPInfo c n l Range -> [c] -> [Item c n l]
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initialR pinfo starts =
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tracePrt "MCFG.Active (Earley Range) - initial rules" (prt . length) $
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do cat <- starts
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Rule abs (Cnc _ _ (lin : lins)) <- topdownRules pinfo ? cat
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return $ Active abs [] (Range (0, 0)) lin lins (emptyChildren abs)
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predictEarleyR :: (Ord c, Ord n, Ord l) => MCFPInfo c n l Range
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-> AChart c n l -> Item c n l -> [Item c n l]
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predictEarleyR pinfo _ item@(Active (Abs _ _ f) _ rng (Lin _ (Cat (cat,_,_):_)) _ _) =
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topdownRules pinfo ? cat >>= predictEarleyR2 rng
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predictEarleyR _ _ _ = []
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predictEarleyR2 :: (Ord c, Ord n, Ord l) => Range -> MCFRule c n l Range -> [Item c n l]
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predictEarleyR2 _ (Rule abs@(Abs _ [] _) (Cnc _ _ lins)) =
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return $ Final abs (makeRangeRec lins) []
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predictEarleyR2 rng (Rule abs (Cnc _ _ (lin : lins))) =
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return $ Active abs [] EmptyRange lin lins (emptyChildren abs)
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----------------------------------------------------------------------
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-- Kilbury --
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-- terminal :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t -> [Item c n l]
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-- terminal pinfo toks =
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-- tracePrt "MCFG.Active (Kilbury) - initial terminal rules" (prt . length) $
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-- do Rule abs (Cnc _ _ lins) <- emptyRules pinfo
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-- lins' <- rangeRestRec toks lins
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-- return $ Final abs (makeRangeRec lins') []
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initialScan :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t -> [Item c n l]
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initialScan pinfo toks =
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tracePrt "MCFG.Active (Kilbury) - initial scanned rules + epsilon rules" (prt . length) $
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do tok <- aElems (inputToken toks)
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Rule abs (Cnc _ _ lins) <-
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leftcornerTokens pinfo ? tok ++
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epsilonRules pinfo
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lin' : lins' <- rangeRestRec toks lins
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return $ Active abs [] EmptyRange lin' lins' (emptyChildren abs)
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predictKilbury :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t
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-> AChart c n l -> Item c n l -> [Item c n l]
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predictKilbury pinfo toks _ (Passive cat found) =
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do Rule abs (Cnc _ _ (Lin l (Cat (_,r,i):syms) : lins)) <- leftcornerCats pinfo ? cat
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lin' : lins' <- rangeRestRec toks (Lin l syms : lins)
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rng <- projection r found
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children <- unifyRec (emptyChildren abs) i found
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return $ Active abs [] rng lin' lins' children
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predictKilbury _ _ _ _ = []
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----------------------------------------------------------------------
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-- KilburyR --
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-- terminalR :: (Ord c, Ord n, Ord l) => MCFPInfo c n l Range -> [Item c n l]
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-- terminalR pinfo =
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-- tracePrt "MCFG.Active (Kilbury Range) - initial terminal rules" (prt . length) $
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-- do Rule abs (Cnc _ _ lins) <- emptyRules pinfo
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-- return $ Final abs (makeRangeRec lins) []
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initialScanR :: (Ord c, Ord n, Ord l) => MCFPInfo c n l Range -> [Item c n l]
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initialScanR pinfo =
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tracePrt "MCFG.Active (Kilbury Range) - initial scanned rules" (prt . length) $
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do Rule abs (Cnc _ _ (lin : lins)) <-
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concatMap snd (aAssocs (leftcornerTokens pinfo)) ++
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epsilonRules pinfo
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return $ Active abs [] EmptyRange lin lins (emptyChildren abs)
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predictKilburyR :: (Ord c, Ord n, Ord l) => MCFPInfo c n l Range
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-> AChart c n l -> Item c n l -> [Item c n l]
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predictKilburyR pinfo _ (Passive cat found) =
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do Rule abs (Cnc _ _ (Lin l (Cat (_,r,i):syms) : lins)) <- leftcornerCats pinfo ? cat
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rng <- projection r found
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children <- unifyRec (emptyChildren abs) i found
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return $ Active abs [] rng (Lin l syms) lins children
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predictKilburyR _ _ _ = []
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----------------------------------------------------------------------
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-- * type definitions
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type AChart c n l = ParseChart (Item c n l) (AKey c)
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data Item c n l = Active (Abstract c n)
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(RangeRec l)
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Range
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(Lin c l Range)
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(LinRec c l Range)
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[RangeRec l]
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| Final (Abstract c n) (RangeRec l) [RangeRec l]
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| Passive c (RangeRec l)
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deriving (Eq, Ord, Show)
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data AKey c = Act c
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| Pass c
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| Useless
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| Fin
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deriving (Eq, Ord, Show)
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keyof :: Item c n l -> AKey c
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keyof (Active _ _ _ (Lin _ (Cat (next, _, _):_)) _ _) = Act next
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keyof (Final _ _ _) = Fin
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keyof (Passive cat _) = Pass cat
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keyof _ = Useless
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----------------------------------------------------------------------
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-- for tracing purposes
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prtSizes chart = "final=" ++ show (length (chartLookup chart Fin)) ++
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", passive=" ++ show (sum [length (chartLookup chart k) |
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k@(Pass _) <- chartKeys chart ]) ++
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", active=" ++ show (sum [length (chartLookup chart k) |
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k@(Act _) <- chartKeys chart ]) ++
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", useless=" ++ show (length (chartLookup chart Useless))
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prtChart chart = concat [ "\n*** KEY: " ++ prt k ++
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prtBefore "\n " (chartLookup chart k) |
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k <- chartKeys chart ]
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prtFinals chart = prtBefore "\n " (chartLookup chart Fin)
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instance (Print c, Print n, Print l) => Print (Item c n l) where
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prt (Active abs found rng lin tofind children) =
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"? " ++ prt abs ++ ";\n\t" ++
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"{" ++ prtSep " " found ++ "} " ++ prt rng ++ " . " ++
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prt lin ++ " {" ++ prtSep " " tofind ++ "}" ++
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( if null children then ";" else ";\n\t" ++
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"{" ++ prtSep "} {" (map (prtSep " ") children) ++ "}" )
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prt (Passive c rrec) = "- " ++ prt c ++ "; {" ++ prtSep " " rrec ++ "}"
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prt (Final abs rr rrs) = ": " ++ prt abs ++ ";\n\t{" ++ prtSep " " rr ++ "}" ++
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( if null rrs then ";" else ";\n\t" ++
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"{" ++ prtSep "} {" (map (prtSep " ") rrs) ++ "}" )
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instance Print c => Print (AKey c) where
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prt (Act c) = "Active " ++ prt c
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prt (Pass c) = "Passive " ++ prt c
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prt (Fin) = "Final"
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prt (Useless) = "Useless"
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237
src-3.0/GF/Parsing/MCFG/Active2.hs
Normal file
237
src-3.0/GF/Parsing/MCFG/Active2.hs
Normal file
@@ -0,0 +1,237 @@
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----------------------------------------------------------------------
|
||||
-- |
|
||||
-- Maintainer : PL
|
||||
-- Stability : (stable)
|
||||
-- Portability : (portable)
|
||||
--
|
||||
-- > CVS $Date: 2005/08/08 09:01:25 $
|
||||
-- > CVS $Author: peb $
|
||||
-- > CVS $Revision: 1.2 $
|
||||
--
|
||||
-- MCFG parsing, the active algorithm (alternative version)
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
module GF.Parsing.MCFG.Active2 (parse) where
|
||||
|
||||
import GF.Data.GeneralDeduction
|
||||
import GF.Data.Assoc
|
||||
|
||||
import GF.Formalism.GCFG
|
||||
import GF.Formalism.MCFG
|
||||
import GF.Formalism.Utilities
|
||||
|
||||
import GF.Parsing.MCFG.Range
|
||||
import GF.Parsing.MCFG.PInfo
|
||||
|
||||
import GF.System.Tracing
|
||||
|
||||
import Control.Monad (guard)
|
||||
|
||||
import GF.Infra.Print
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- * parsing
|
||||
|
||||
--parse :: (Ord n, Ord c, Ord l, Ord t) => String -> MCFParser c n l t
|
||||
parse strategy pinfo starts toks =
|
||||
accumAssoc groupSyntaxNodes $
|
||||
[ ((cat, found), SNode fun (zip rhs rrecs)) |
|
||||
Final (Abs cat rhs fun) found rrecs <- chartLookup chart Fin ]
|
||||
where chart = process strategy pinfo starts toks
|
||||
|
||||
process :: (Ord n, Ord c, Ord l, Ord t) =>
|
||||
String -> MCFPInfo c n l t -> [c] -> Input t -> AChart c n l t
|
||||
process strategy pinfo starts toks
|
||||
= tracePrt "MCFG.Active - chart size" prtSizes $
|
||||
buildChart keyof (complete : combine : convert : rules) axioms
|
||||
where rules | isNil strategy = [scan toks]
|
||||
| isBU strategy = [scan toks, predictKilbury pinfo toks]
|
||||
| isTD strategy = [scan toks, predictEarley pinfo toks]
|
||||
axioms | isNil strategy = predict pinfo toks
|
||||
| isBU strategy = terminal pinfo toks ++ initialScan pinfo toks
|
||||
| isTD strategy = initial pinfo starts toks
|
||||
|
||||
isNil s = s=="n"
|
||||
isBU s = s=="b"
|
||||
isTD s = s=="t"
|
||||
|
||||
-- used in prediction
|
||||
emptyChildren :: Abstract c n -> [RangeRec l]
|
||||
emptyChildren (Abs _ rhs _) = replicate (length rhs) []
|
||||
|
||||
makeMaxRange (Range (_, j)) = Range (j, j)
|
||||
makeMaxRange EmptyRange = EmptyRange
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- * inference rules
|
||||
|
||||
-- completion
|
||||
complete :: (Ord c, Ord n, Ord l, Ord t) => AChart c n l t -> Item c n l t -> [Item c n l t]
|
||||
complete _ (Active rule found rng (Lin l []) (lin:lins) recs) =
|
||||
return $ Active rule (found ++ [(l, rng)]) EmptyRange lin lins recs
|
||||
complete _ _ = []
|
||||
|
||||
-- scanning
|
||||
--scan :: (Ord c, Ord n, Ord l, Ord t) => AChart c n l t -> Item c n l t -> [Item c n l t]
|
||||
scan inp _ (Active rule found rng (Lin l (Tok tok:syms)) lins recs) =
|
||||
do rng' <- map makeRange (inputToken inp ? tok)
|
||||
rng'' <- concatRange rng rng'
|
||||
return $ Active rule found rng'' (Lin l syms) lins recs
|
||||
scan _ _ _ = []
|
||||
|
||||
-- | Creates an Active Item every time it is possible to combine
|
||||
-- an Active Item from the agenda with a Passive Item from the Chart
|
||||
combine :: (Ord c, Ord n, Ord l, Ord t) => AChart c n l t -> Item c n l t -> [Item c n l t]
|
||||
combine chart item@(Active _ _ _ (Lin _ (Cat (c,_,_):_)) _ _) =
|
||||
do Passive _c found <- chartLookup chart (Pass c)
|
||||
combine2 chart found item
|
||||
combine chart (Passive c found) =
|
||||
do item <- chartLookup chart (Act c)
|
||||
combine2 chart found item
|
||||
combine _ _ = []
|
||||
|
||||
combine2 chart found' (Active rule found rng (Lin l (Cat (c, r, d):syms)) lins recs) =
|
||||
do rng' <- projection r found'
|
||||
rng'' <- concatRange rng rng'
|
||||
recs' <- unifyRec recs d found'
|
||||
return $ Active rule found rng'' (Lin l syms) lins recs'
|
||||
|
||||
-- | Active Items with nothing to find are converted to Final items,
|
||||
-- which in turn are converted to Passive Items
|
||||
convert :: (Ord c, Ord n, Ord l, Ord t) => AChart c n l t -> Item c n l t -> [Item c n l t]
|
||||
convert _ (Active rule found rng (Lin lbl []) [] recs) =
|
||||
return $ Final rule (found ++ [(lbl,rng)]) recs
|
||||
convert _ (Final (Abs cat _ _) found _) =
|
||||
return $ Passive cat found
|
||||
convert _ _ = []
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Naive --
|
||||
|
||||
predict :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t -> [Item c n l t]
|
||||
predict pinfo toks = tracePrt "MCFG.Active (Naive) - predicted rules" (prt . length) $
|
||||
do Rule abs (Cnc _ _ (lin:lins)) <- rulesMatchingInput pinfo toks
|
||||
return $ Active abs [] EmptyRange lin lins (emptyChildren abs)
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Earley --
|
||||
|
||||
-- anropas med alla startkategorier
|
||||
initial :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> [c] -> Input t -> [Item c n l t]
|
||||
initial pinfo starts toks =
|
||||
tracePrt "MCFG.Active (Earley) - initial rules" (prt . length) $
|
||||
do cat <- starts
|
||||
Rule abs (Cnc _ _ (lin:lins)) <- topdownRules pinfo ? cat
|
||||
return $ Active abs [] (Range (0, 0)) lin lins (emptyChildren abs)
|
||||
|
||||
predictEarley :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t
|
||||
-> AChart c n l t -> Item c n l t -> [Item c n l t]
|
||||
predictEarley pinfo toks _ item@(Active (Abs _ _ f) _ rng (Lin _ (Cat (cat,_,_):_)) _ _) =
|
||||
topdownRules pinfo ? cat >>= predictEarley2 toks rng
|
||||
predictEarley _ _ _ _ = []
|
||||
|
||||
predictEarley2 :: (Ord c, Ord n, Ord l, Ord t) => Input t -> Range -> MCFRule c n l t -> [Item c n l t]
|
||||
predictEarley2 toks _ (Rule abs@(Abs _ [] _) (Cnc _ _ lins)) =
|
||||
do lins' <- rangeRestRec toks lins
|
||||
return $ Final abs (makeRangeRec lins') []
|
||||
predictEarley2 toks rng (Rule abs (Cnc _ _ (lin:lins))) =
|
||||
return $ Active abs [] EmptyRange lin lins (emptyChildren abs)
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Kilbury --
|
||||
|
||||
terminal :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t -> [Item c n l t]
|
||||
terminal pinfo toks =
|
||||
tracePrt "MCFG.Active (Kilbury) - initial terminal rules" (prt . length) $
|
||||
do Rule abs (Cnc _ _ lins) <- emptyRules pinfo
|
||||
lins' <- rangeRestRec toks lins
|
||||
return $ Final abs (makeRangeRec lins') []
|
||||
|
||||
initialScan :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t -> [Item c n l t]
|
||||
initialScan pinfo toks =
|
||||
tracePrt "MCFG.Active (Kilbury) - initial scanned rules" (prt . length) $
|
||||
do tok <- aElems (inputToken toks)
|
||||
Rule abs (Cnc _ _ (lin:lins)) <- leftcornerTokens pinfo ? tok
|
||||
return $ Active abs [] EmptyRange lin lins (emptyChildren abs)
|
||||
|
||||
predictKilbury :: (Ord c, Ord n, Ord l, Ord t) => MCFPInfo c n l t -> Input t
|
||||
-> AChart c n l t -> Item c n l t -> [Item c n l t]
|
||||
predictKilbury pinfo toks _ (Passive cat found) =
|
||||
do Rule abs (Cnc _ _ (Lin l (Cat (_,r,i):syms) : lins)) <- leftcornerCats pinfo ? cat
|
||||
rng <- projection r found
|
||||
children <- unifyRec (emptyChildren abs) i found
|
||||
return $ Active abs [] rng (Lin l syms) lins children
|
||||
predictKilbury _ _ _ _ = []
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- * type definitions
|
||||
|
||||
type AChart c n l t = ParseChart (Item c n l t) (AKey c t)
|
||||
|
||||
data Item c n l t = Active (Abstract c n)
|
||||
(RangeRec l)
|
||||
Range
|
||||
(Lin c l t)
|
||||
(LinRec c l t)
|
||||
[RangeRec l]
|
||||
| Final (Abstract c n) (RangeRec l) [RangeRec l]
|
||||
| Passive c (RangeRec l)
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
data AKey c t = Act c
|
||||
| ActTok t
|
||||
| Pass c
|
||||
| Useless
|
||||
| Fin
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
|
||||
keyof :: Item c n l t -> AKey c t
|
||||
keyof (Active _ _ _ (Lin _ (Cat (next, _, _):_)) _ _) = Act next
|
||||
keyof (Active _ _ _ (Lin _ (Tok tok:_)) _ _) = ActTok tok
|
||||
keyof (Final _ _ _) = Fin
|
||||
keyof (Passive cat _) = Pass cat
|
||||
keyof _ = Useless
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- for tracing purposes
|
||||
|
||||
prtSizes chart = "final=" ++ show (length (chartLookup chart Fin)) ++
|
||||
", passive=" ++ show (sum [length (chartLookup chart k) |
|
||||
k@(Pass _) <- chartKeys chart ]) ++
|
||||
", active=" ++ show (sum [length (chartLookup chart k) |
|
||||
k@(Act _) <- chartKeys chart ]) ++
|
||||
", active-tok=" ++ show (sum [length (chartLookup chart k) |
|
||||
k@(ActTok _) <- chartKeys chart ]) ++
|
||||
", useless=" ++ show (length (chartLookup chart Useless))
|
||||
|
||||
prtChart chart = concat [ "\n*** KEY: " ++ prt k ++
|
||||
prtBefore "\n " (chartLookup chart k) |
|
||||
k <- chartKeys chart ]
|
||||
|
||||
prtFinals chart = prtBefore "\n " (chartLookup chart Fin)
|
||||
|
||||
instance (Print c, Print n, Print l, Print t) => Print (Item c n l t) where
|
||||
prt (Active abs found rng lin tofind children) =
|
||||
"? " ++ prt abs ++ ";\n\t" ++
|
||||
"{" ++ prtSep " " found ++ "} " ++ prt rng ++ " . " ++
|
||||
prt lin ++ " {" ++ prtSep " " tofind ++ "}" ++
|
||||
( if null children then ";" else ";\n\t" ++
|
||||
"{" ++ prtSep "} {" (map (prtSep " ") children) ++ "}" )
|
||||
prt (Passive c rrec) = "- " ++ prt c ++ "; {" ++ prtSep " " rrec ++ "}"
|
||||
prt (Final abs rr rrs) = ": " ++ prt abs ++ ";\n\t{" ++ prtSep " " rr ++ "}" ++
|
||||
( if null rrs then ";" else ";\n\t" ++
|
||||
"{" ++ prtSep "} {" (map (prtSep " ") rrs) ++ "}" )
|
||||
|
||||
instance (Print c, Print t) => Print (AKey c t) where
|
||||
prt (Act c) = "Active " ++ prt c
|
||||
prt (ActTok t) = "Active-Tok " ++ prt t
|
||||
prt (Pass c) = "Passive " ++ prt c
|
||||
prt (Fin) = "Final"
|
||||
prt (Useless) = "Useless"
|
||||
176
src-3.0/GF/Parsing/MCFG/FastActive.hs
Normal file
176
src-3.0/GF/Parsing/MCFG/FastActive.hs
Normal file
@@ -0,0 +1,176 @@
|
||||
----------------------------------------------------------------------
|
||||
-- |
|
||||
-- Maintainer : Peter Ljunglöf
|
||||
-- Stability : (stable)
|
||||
-- Portability : (portable)
|
||||
--
|
||||
-- MCFG parsing, the active algorithm, optimized version
|
||||
-- structure stolen from Krasimir Angelov's GF.Parsing.FCFG.Active
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
module GF.Parsing.MCFG.FastActive (parse) where
|
||||
|
||||
import GF.Data.GeneralDeduction
|
||||
import GF.Data.Assoc
|
||||
import GF.Data.Utilities
|
||||
|
||||
import GF.Formalism.GCFG
|
||||
import GF.Formalism.MCFG
|
||||
import GF.Formalism.Utilities
|
||||
|
||||
import GF.Infra.Ident
|
||||
|
||||
import GF.Parsing.MCFG.Range
|
||||
import GF.Parsing.MCFG.PInfo
|
||||
|
||||
import GF.System.Tracing
|
||||
|
||||
import Control.Monad (guard)
|
||||
|
||||
import GF.Infra.Print
|
||||
|
||||
import qualified Data.List as List
|
||||
import qualified Data.Map as Map
|
||||
import qualified Data.Set as Set
|
||||
import Data.Array
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- * parsing
|
||||
|
||||
-- parse :: (Ord c, Ord n, Ord l, Ord t) => String -> MCFParser c n l t
|
||||
parse strategy pinfo starts =
|
||||
accumAssoc groupSyntaxNodes $
|
||||
[ ((cat, found), SNode fun (zip rhs rrecs)) |
|
||||
Final (Abs cat rhs fun) found rrecs <- listXChartFinal chart ]
|
||||
where chart = process strategy pinfo axioms emptyXChart
|
||||
|
||||
-- axioms | isBU strategy = terminal pinfo toks ++ initialScan pinfo toks
|
||||
axioms | isBU strategy = initialBU pinfo
|
||||
| isTD strategy = initialTD pinfo starts
|
||||
|
||||
isBU s = s=="b"
|
||||
isTD s = s=="t"
|
||||
|
||||
-- used in prediction
|
||||
emptyChildren :: Abstract c n -> [RangeRec l]
|
||||
emptyChildren (Abs _ rhs _) = replicate (length rhs) []
|
||||
|
||||
updateChildren :: Eq l => [RangeRec l] -> Int -> RangeRec l -> [[RangeRec l]]
|
||||
updateChildren recs i rec = updateNthM update i recs
|
||||
where update rec' = do guard (null rec' || rec' == rec)
|
||||
return rec
|
||||
|
||||
process :: (Ord c, Ord n, Ord l) => String -> MCFPInfo c n l Range -> [Item c n l] -> XChart c n l -> XChart c n l
|
||||
process strategy pinfo [] chart = chart
|
||||
process strategy pinfo (item:items) chart = process strategy pinfo items $! univRule item chart
|
||||
where
|
||||
univRule item@(Active abs found rng (Lin l syms) lins recs) chart
|
||||
= case syms of
|
||||
Cat(c,r,d) : syms' ->
|
||||
case insertXChart chart item c of
|
||||
Nothing -> chart
|
||||
Just chart ->
|
||||
let items = -- predict topdown
|
||||
[ Active abs [] EmptyRange lin lins (emptyChildren abs) |
|
||||
isTD strategy,
|
||||
Rule abs (Cnc _ _ (lin:lins)) <- topdownRules pinfo ? c ] ++
|
||||
|
||||
-- combine
|
||||
[ Active abs found rng'' (Lin l syms') lins recs' |
|
||||
Final _ found' _ <- lookupXChartFinal chart c,
|
||||
rng' <- projection r found',
|
||||
rng'' <- concatRange rng rng',
|
||||
recs' <- updateChildren recs d found' ]
|
||||
in process strategy pinfo items chart
|
||||
|
||||
-- scan
|
||||
Tok rng' : syms' ->
|
||||
let items = [ Active abs found rng'' (Lin l syms') lins recs |
|
||||
rng'' <- concatRange rng rng' ]
|
||||
in process strategy pinfo items chart
|
||||
|
||||
-- complete
|
||||
[] -> case lins of
|
||||
(lin':lins') -> univRule (Active abs ((l,rng):found) EmptyRange lin' lins' recs) chart
|
||||
[] -> univRule (Final abs (reverse ((l,rng):found)) recs) chart
|
||||
|
||||
univRule item@(Final abs@(Abs cat _ _) found' recs) chart =
|
||||
case insertXChart chart item cat of
|
||||
Nothing -> chart
|
||||
Just chart ->
|
||||
let items = -- predict bottomup
|
||||
[ Active abs [] rng (Lin l syms') lins children |
|
||||
isBU strategy,
|
||||
Rule abs (Cnc _ _ (Lin l (Cat(c,r,d):syms') : lins)) <- leftcornerCats pinfo ? cat,
|
||||
-- lin' : lins' <- rangeRestRec toks (Lin l syms' : lins),
|
||||
rng <- projection r found',
|
||||
children <- unifyRec (emptyChildren abs) d found' ] ++
|
||||
|
||||
-- combine
|
||||
[ Active abs found rng'' (Lin l syms') lins recs' |
|
||||
Active abs found rng (Lin l (Cat(c,r,d):syms')) lins recs <- lookupXChartAct chart cat,
|
||||
rng' <- projection r found',
|
||||
rng'' <- concatRange rng rng',
|
||||
recs' <- updateChildren recs d found' ]
|
||||
in process strategy pinfo items chart
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- * XChart
|
||||
|
||||
data XChart c n l = XChart !(AChart c n l) !(AChart c n l)
|
||||
type AChart c n l = ParseChart (Item c n l) c
|
||||
|
||||
data Item c n l = Active (Abstract c n)
|
||||
(RangeRec l)
|
||||
Range
|
||||
(Lin c l Range)
|
||||
(LinRec c l Range)
|
||||
[RangeRec l]
|
||||
| Final (Abstract c n) (RangeRec l) [RangeRec l]
|
||||
-- | Passive c (RangeRec l)
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
emptyXChart :: (Ord c, Ord n, Ord l) => XChart c n l
|
||||
emptyXChart = XChart emptyChart emptyChart
|
||||
|
||||
insertXChart (XChart actives finals) item@(Active _ _ _ _ _ _) c =
|
||||
case chartInsert actives item c of
|
||||
Nothing -> Nothing
|
||||
Just actives -> Just (XChart actives finals)
|
||||
|
||||
insertXChart (XChart actives finals) item@(Final _ _ _) c =
|
||||
case chartInsert finals item c of
|
||||
Nothing -> Nothing
|
||||
Just finals -> Just (XChart actives finals)
|
||||
|
||||
lookupXChartAct (XChart actives finals) c = chartLookup actives c
|
||||
lookupXChartFinal (XChart actives finals) c = chartLookup finals c
|
||||
|
||||
listXChartAct (XChart actives finals) = chartList actives
|
||||
listXChartFinal (XChart actives finals) = chartList finals
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Earley --
|
||||
|
||||
-- called with all starting categories
|
||||
initialTD :: (Ord c, Ord n, Ord l) => MCFPInfo c n l Range -> [c] -> [Item c n l]
|
||||
initialTD pinfo starts =
|
||||
[ Active abs [] (Range (0, 0)) lin' lins' (emptyChildren abs) |
|
||||
cat <- starts,
|
||||
Rule abs (Cnc _ _ (lin':lins')) <- topdownRules pinfo ? cat ]
|
||||
-- lin' : lins' <- rangeRestRec toks lins
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- Kilbury --
|
||||
|
||||
initialBU :: (Ord c, Ord n, Ord l) => MCFPInfo c n l Range -> [Item c n l]
|
||||
initialBU pinfo =
|
||||
[ Active abs [] EmptyRange lin' lins' (emptyChildren abs) |
|
||||
-- do tok <- aElems (inputToken toks)
|
||||
Rule abs (Cnc _ _ (lin':lins')) <-
|
||||
concatMap snd (aAssocs (leftcornerTokens pinfo)) ++
|
||||
-- leftcornerTokens pinfo ? tok ++
|
||||
epsilonRules pinfo ]
|
||||
-- lin' : lins' <- rangeRestRec toks lins
|
||||
178
src-3.0/GF/Parsing/MCFG/Incremental.hs
Normal file
178
src-3.0/GF/Parsing/MCFG/Incremental.hs
Normal file
@@ -0,0 +1,178 @@
|
||||
----------------------------------------------------------------------
|
||||
-- |
|
||||
-- Maintainer : PL
|
||||
-- Stability : (stable)
|
||||
-- Portability : (portable)
|
||||
--
|
||||
-- > CVS $Date: 2005/08/08 09:01:25 $
|
||||
-- > CVS $Author: peb $
|
||||
-- > CVS $Revision: 1.4 $
|
||||
--
|
||||
-- MCFG parsing, the incremental algorithm
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
module GF.Parsing.MCFG.Incremental (parse, parseR) where
|
||||
|
||||
import Data.List
|
||||
import Control.Monad (guard)
|
||||
|
||||
import GF.Data.Utilities (select)
|
||||
import GF.Data.GeneralDeduction
|
||||
import GF.Data.Assoc
|
||||
|
||||
import GF.Formalism.GCFG
|
||||
import GF.Formalism.MCFG
|
||||
import GF.Formalism.Utilities
|
||||
|
||||
import GF.Parsing.MCFG.Range
|
||||
import GF.Parsing.MCFG.PInfo
|
||||
|
||||
import GF.System.Tracing
|
||||
import GF.Infra.Print
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- parsing
|
||||
|
||||
parse :: (Ord n, Ord c, Ord l, Ord t) => MCFParser c n l t
|
||||
parse pinfo starts toks =
|
||||
accumAssoc groupSyntaxNodes $
|
||||
[ ((cat, found), SNode fun (zip rhs rrecs)) |
|
||||
Final (Abs cat rhs fun) found rrecs <- chartLookup chart Fin ]
|
||||
where chart = process pinfo toks ntoks
|
||||
ntoks = snd (inputBounds toks)
|
||||
|
||||
-- parseR :: (Ord n, Ord c, Ord l, Ord t) => MCFParser c n l t
|
||||
parseR pinfo starts ntoks =
|
||||
accumAssoc groupSyntaxNodes $
|
||||
[ ((cat, found), SNode fun (zip rhs rrecs)) |
|
||||
Final (Abs cat rhs fun) found rrecs <- chartLookup chart Fin ]
|
||||
where chart = processR pinfo ntoks
|
||||
|
||||
process :: (Ord n, Ord c, Ord l, Ord t) => MCFPInfo c n l t -> Input t -> Int -> IChart c n l
|
||||
process pinfo toks ntoks
|
||||
= tracePrt "MCFG.Incremental - chart size" prtSizes $
|
||||
buildChart keyof [complete ntoks, scan, combine, convert] (predict pinfo toks ntoks)
|
||||
|
||||
processR :: (Ord n, Ord c, Ord l) => MCFPInfo c n l Range -> Int -> IChart c n l
|
||||
processR pinfo ntoks
|
||||
= tracePrt "MCFG.Incremental Range - chart size" prtSizes $
|
||||
buildChart keyof [complete ntoks, scan, combine, convert] (predictR pinfo ntoks)
|
||||
|
||||
complete :: (Ord n, Ord c, Ord l) => Int -> IChart c n l -> Item c n l -> [Item c n l]
|
||||
complete ntoks _ (Active rule found rng (Lin l []) lins recs) =
|
||||
do (lin, lins') <- select lins
|
||||
k <- [minRange rng .. ntoks]
|
||||
return $ Active rule (found ++ [(l, rng)]) (Range (k,k)) lin lins' recs
|
||||
complete _ _ _ = []
|
||||
|
||||
|
||||
predict :: (Ord n, Ord c, Ord l, Ord t) => MCFPInfo c n l t -> Input t -> Int -> [Item c n l]
|
||||
predict pinfo toks n =
|
||||
tracePrt "MCFG.Incremental - predicted rules" (prt . length) $
|
||||
do Rule abs@(Abs _ rhs _) (Cnc _ _ lins) <- rulesMatchingInput pinfo toks
|
||||
let daughters = replicate (length rhs) []
|
||||
lins' <- rangeRestRec toks lins
|
||||
(lin', lins'') <- select lins'
|
||||
k <- [0..n]
|
||||
return $ Active abs [] (Range (k,k)) lin' lins'' daughters
|
||||
|
||||
|
||||
predictR :: (Ord n, Ord c, Ord l) => MCFPInfo c n l Range -> Int -> [Item c n l]
|
||||
predictR pinfo n =
|
||||
tracePrt "MCFG.Incremental Range - predicted rules" (prt . length) $
|
||||
do Rule abs@(Abs _ rhs _) (Cnc _ _ lins) <- allRules pinfo
|
||||
let daughters = replicate (length rhs) []
|
||||
(lin, lins') <- select lins
|
||||
k <- [0..n]
|
||||
return $ Active abs [] (Range (k,k)) lin lins' daughters
|
||||
|
||||
|
||||
scan :: (Ord n, Ord c, Ord l) => IChart c n l -> Item c n l -> [Item c n l]
|
||||
scan _ (Active abs found rng (Lin l (Tok rng':syms)) lins recs) =
|
||||
do rng'' <- concatRange rng rng'
|
||||
return $ Active abs found rng'' (Lin l syms) lins recs
|
||||
scan _ _ = []
|
||||
|
||||
|
||||
combine :: (Ord n, Ord c, Ord l) => IChart c n l -> Item c n l -> [Item c n l]
|
||||
combine chart active@(Active _ _ rng (Lin _ (Cat (c,l,_):_)) _ _) =
|
||||
do passive <- chartLookup chart (Pass c l (maxRange rng))
|
||||
combine2 active passive
|
||||
combine chart passive@(Active (Abs c _ _) _ rng (Lin l []) _ _) =
|
||||
do active <- chartLookup chart (Act c l (minRange rng))
|
||||
combine2 active passive
|
||||
combine _ _ = []
|
||||
|
||||
combine2 (Active abs found rng (Lin l (Cat (c,l',d):syms)) lins recs)
|
||||
(Active _ found' rng' _ _ _)
|
||||
= do rng'' <- concatRange rng rng'
|
||||
recs' <- unifyRec recs d found''
|
||||
return $ Active abs found rng'' (Lin l syms) lins recs'
|
||||
where found'' = found' ++ [(l',rng')]
|
||||
|
||||
|
||||
convert _ (Active rule found rng (Lin lbl []) [] recs) =
|
||||
return $ Final rule (found ++ [(lbl,rng)]) recs
|
||||
convert _ _ = []
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- type definitions
|
||||
|
||||
type IChart c n l = ParseChart (Item c n l) (IKey c l)
|
||||
|
||||
data Item c n l = Active (Abstract c n)
|
||||
(RangeRec l)
|
||||
Range
|
||||
(Lin c l Range)
|
||||
(LinRec c l Range)
|
||||
[RangeRec l]
|
||||
| Final (Abstract c n) (RangeRec l) [RangeRec l]
|
||||
-- | Passive c (RangeRec l)
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
data IKey c l = Act c l Int
|
||||
| Pass c l Int
|
||||
| Useless
|
||||
| Fin
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
keyof :: Item c n l -> IKey c l
|
||||
keyof (Active _ _ rng (Lin _ (Cat (next,lbl,_):_)) _ _)
|
||||
= Act next lbl (maxRange rng)
|
||||
keyof (Active (Abs cat _ _) found rng (Lin lbl []) _ _)
|
||||
= Pass cat lbl (minRange rng)
|
||||
keyof (Final _ _ _) = Fin
|
||||
keyof _
|
||||
= Useless
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- for tracing purposes
|
||||
prtSizes chart = "final=" ++ show (length (chartLookup chart Fin)) ++
|
||||
", passive=" ++ show (sum [length (chartLookup chart k) |
|
||||
k@(Pass _ _ _) <- chartKeys chart ]) ++
|
||||
", active=" ++ show (sum [length (chartLookup chart k) |
|
||||
k@(Act _ _ _) <- chartKeys chart ]) ++
|
||||
", useless=" ++ show (length (chartLookup chart Useless))
|
||||
|
||||
prtChart chart = concat [ "\n*** KEY: " ++ prt k ++
|
||||
prtBefore "\n " (chartLookup chart k) |
|
||||
k <- chartKeys chart ]
|
||||
|
||||
instance (Print c, Print n, Print l) => Print (Item c n l) where
|
||||
prt (Active abs found rng lin tofind children) =
|
||||
"? " ++ prt abs ++ ";\n\t" ++
|
||||
"{" ++ prtSep " " found ++ "} " ++ prt rng ++ " . " ++
|
||||
prt lin ++ "{" ++ prtSep " " tofind ++ "}" ++
|
||||
( if null children then ";" else ";\n\t" ++
|
||||
"{" ++ prtSep "} {" (map (prtSep " ") children) ++ "}" )
|
||||
-- prt (Passive c rrec) = "- " ++ prt c ++ "; {" ++ prtSep " " rrec ++ "}"
|
||||
prt (Final abs rr rrs) = ": " ++ prt abs ++ ";\n\t{" ++ prtSep " " rr ++ "}" ++
|
||||
( if null rrs then ";" else ";\n\t" ++
|
||||
"{" ++ prtSep "} {" (map (prtSep " ") rrs) ++ "}" )
|
||||
|
||||
instance (Print c, Print l) => Print (IKey c l) where
|
||||
prt (Act c l i) = "Active " ++ prt c ++ " " ++ prt l ++ " @ " ++ prt i
|
||||
prt (Pass c l i) = "Passive " ++ prt c ++ " " ++ prt l ++ " @ " ++ prt i
|
||||
prt (Fin) = "Final"
|
||||
prt (Useless) = "Useless"
|
||||
157
src-3.0/GF/Parsing/MCFG/Incremental2.hs
Normal file
157
src-3.0/GF/Parsing/MCFG/Incremental2.hs
Normal file
@@ -0,0 +1,157 @@
|
||||
----------------------------------------------------------------------
|
||||
-- |
|
||||
-- Maintainer : PL
|
||||
-- Stability : (stable)
|
||||
-- Portability : (portable)
|
||||
--
|
||||
-- > CVS $Date: 2005/08/08 09:01:25 $
|
||||
-- > CVS $Author: peb $
|
||||
-- > CVS $Revision: 1.3 $
|
||||
--
|
||||
-- MCFG parsing, the incremental algorithm (alternative version)
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
module GF.Parsing.MCFG.Incremental2 (parse) where
|
||||
|
||||
import Data.List
|
||||
import Data.Array
|
||||
import Control.Monad (guard)
|
||||
|
||||
import GF.Data.Utilities (select)
|
||||
import GF.Data.Assoc
|
||||
import GF.Data.IncrementalDeduction
|
||||
|
||||
import GF.Formalism.GCFG
|
||||
import GF.Formalism.MCFG
|
||||
import GF.Formalism.Utilities
|
||||
|
||||
import GF.Parsing.MCFG.Range
|
||||
import GF.Parsing.MCFG.PInfo
|
||||
|
||||
import GF.System.Tracing
|
||||
import GF.Infra.Print
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- parsing
|
||||
|
||||
-- parseR :: (Ord n, Ord c, Ord l, Ord t) => MCFParser c n l t
|
||||
parse pinfo starts inp =
|
||||
accumAssoc groupSyntaxNodes $
|
||||
[ ((cat, found), SNode fun (zip rhs rrecs)) |
|
||||
k <- uncurry enumFromTo (inputBounds inp),
|
||||
Final (Abs cat rhs fun) found rrecs <- chartLookup chart k Fin ]
|
||||
where chart = process pinfo inp
|
||||
|
||||
--process :: (Ord n, Ord c, Ord l) => MCFPInfo c n l Range -> (Int, Int) -> IChart c n l
|
||||
process pinfo inp
|
||||
= tracePrt "MCFG.Incremental - chart size"
|
||||
(prt . map (prtSizes finalChart . fst) . assocs) $
|
||||
finalChart
|
||||
where finalChart = buildChart keyof rules axioms inBounds
|
||||
axioms k = tracePrt ("MCFG.Incremental - axioms for " ++ show k) (prt . length) $
|
||||
predict k ++ scan k ++ complete1 k
|
||||
rules k item = complete2 k item ++ combine k item ++ convert k item
|
||||
inBounds = inputBounds inp
|
||||
|
||||
-- axioms: predict + scan + complete
|
||||
predict k = do Rule abs@(Abs _ rhs _) (Cnc _ _ lins) <- rulesMatchingInput pinfo inp
|
||||
let daughters = replicate (length rhs) []
|
||||
(lin, lins') <- select lins
|
||||
return $ Active abs [] k lin lins' daughters
|
||||
|
||||
scan k = do (tok, js) <- aAssocs (inputTo inp ! k)
|
||||
j <- js
|
||||
Active abs found i (Lin l (Tok _tok:syms)) lins recs <-
|
||||
chartLookup finalChart j (ActTok tok)
|
||||
return $ Active abs found i (Lin l syms) lins recs
|
||||
|
||||
complete1 k = do j <- [fst inBounds .. k-1]
|
||||
Active abs found i (Lin l _Nil) lins recs <-
|
||||
chartLookup finalChart j Pass
|
||||
let found' = found ++ [(l, makeRange (i,j))]
|
||||
(lin, lins') <- select lins
|
||||
return $ Active abs found' k lin lins' recs
|
||||
|
||||
-- rules: convert + combine + complete
|
||||
convert k (Active rule found j (Lin lbl []) [] recs) =
|
||||
let found' = found ++ [(lbl, makeRange (j,k))]
|
||||
in return $ Final rule found' recs
|
||||
convert _ _ = []
|
||||
|
||||
combine k (Active (Abs cat _ _) found' j (Lin lbl []) _ _) =
|
||||
do guard (j < k) ---- cannot handle epsilon-rules
|
||||
Active abs found i (Lin l (Cat (_cat,_lbl,nr):syms)) lins recs <-
|
||||
chartLookup finalChart j (Act cat lbl)
|
||||
let found'' = found' ++ [(lbl, makeRange (j,k))]
|
||||
recs' <- unifyRec recs nr found''
|
||||
return $ Active abs found i (Lin l syms) lins recs'
|
||||
combine _ _ = []
|
||||
|
||||
complete2 k (Active abs found i (Lin l []) lins recs) =
|
||||
do let found' = found ++ [(l, makeRange (i,k))]
|
||||
(lin, lins') <- select lins
|
||||
return $ Active abs found' k lin lins' recs
|
||||
complete2 _ _ = []
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- type definitions
|
||||
|
||||
type IChart c n l t = IncrementalChart (Item c n l t) (IKey c l t)
|
||||
|
||||
data Item c n l t = Active (Abstract c n)
|
||||
(RangeRec l)
|
||||
Int
|
||||
(Lin c l t)
|
||||
(LinRec c l t)
|
||||
[RangeRec l]
|
||||
| Final (Abstract c n) (RangeRec l) [RangeRec l]
|
||||
---- | Passive c (RangeRec l)
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
data IKey c l t = Act c l
|
||||
| ActTok t
|
||||
---- | Useless
|
||||
| Pass
|
||||
| Fin
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
keyof :: Item c n l t -> IKey c l t
|
||||
keyof (Active _ _ _ (Lin _ (Cat (next,lbl,_):_)) _ _) = Act next lbl
|
||||
keyof (Active _ _ _ (Lin _ (Tok tok:_)) _ _) = ActTok tok
|
||||
keyof (Active _ _ _ (Lin _ []) _ _) = Pass
|
||||
keyof (Final _ _ _) = Fin
|
||||
-- keyof _ = Useless
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- for tracing purposes
|
||||
prtSizes chart k = "f=" ++ show (length (chartLookup chart k Fin)) ++
|
||||
" p=" ++ show (length (chartLookup chart k Pass)) ++
|
||||
" a=" ++ show (sum [length (chartLookup chart k key) |
|
||||
key@(Act _ _) <- chartKeys chart k ]) ++
|
||||
" t=" ++ show (sum [length (chartLookup chart k key) |
|
||||
key@(ActTok _) <- chartKeys chart k ])
|
||||
-- " u=" ++ show (length (chartLookup chart k Useless))
|
||||
|
||||
-- prtChart chart = concat [ "\n*** KEY: " ++ prt k ++
|
||||
-- prtBefore "\n " (chartLookup chart k) |
|
||||
-- k <- chartKeys chart ]
|
||||
|
||||
instance (Print c, Print n, Print l, Print t) => Print (Item c n l t) where
|
||||
prt (Active abs found rng lin tofind children) =
|
||||
"? " ++ prt abs ++ ";\n\t" ++
|
||||
"{" ++ prtSep " " found ++ "} " ++ prt rng ++ " . " ++
|
||||
prt lin ++ "{" ++ prtSep " " tofind ++ "}" ++
|
||||
( if null children then ";" else ";\n\t" ++
|
||||
"{" ++ prtSep "} {" (map (prtSep " ") children) ++ "}" )
|
||||
-- prt (Passive c rrec) = "- " ++ prt c ++ "; {" ++ prtSep " " rrec ++ "}"
|
||||
prt (Final abs rr rrs) = ": " ++ prt abs ++ ";\n\t{" ++ prtSep " " rr ++ "}" ++
|
||||
( if null rrs then ";" else ";\n\t" ++
|
||||
"{" ++ prtSep "} {" (map (prtSep " ") rrs) ++ "}" )
|
||||
|
||||
instance (Print c, Print l, Print t) => Print (IKey c l t) where
|
||||
prt (Act c l) = "Active " ++ prt c ++ " " ++ prt l
|
||||
prt (ActTok t) = "ActiveTok " ++ prt t
|
||||
-- prt (Pass c l i) = "Passive " ++ prt c ++ " " ++ prt l ++ " @ " ++ prt i
|
||||
prt (Fin) = "Final"
|
||||
-- prt (Useless) = "Useless"
|
||||
142
src-3.0/GF/Parsing/MCFG/Naive.hs
Normal file
142
src-3.0/GF/Parsing/MCFG/Naive.hs
Normal file
@@ -0,0 +1,142 @@
|
||||
----------------------------------------------------------------------
|
||||
-- |
|
||||
-- Maintainer : PL
|
||||
-- Stability : (stable)
|
||||
-- Portability : (portable)
|
||||
--
|
||||
-- > CVS $Date: 2005/08/08 09:01:25 $
|
||||
-- > CVS $Author: peb $
|
||||
-- > CVS $Revision: 1.5 $
|
||||
--
|
||||
-- MCFG parsing, the naive algorithm
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
module GF.Parsing.MCFG.Naive (parse, parseR) where
|
||||
|
||||
import Control.Monad (guard)
|
||||
|
||||
-- GF modules
|
||||
import GF.Data.GeneralDeduction
|
||||
import GF.Formalism.GCFG
|
||||
import GF.Formalism.MCFG
|
||||
import GF.Formalism.Utilities
|
||||
import GF.Parsing.MCFG.Range
|
||||
import GF.Parsing.MCFG.PInfo
|
||||
import GF.Data.SortedList
|
||||
import GF.Data.Assoc
|
||||
import GF.System.Tracing
|
||||
|
||||
import GF.Infra.Print
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- * parsing
|
||||
|
||||
-- | Builds a chart from the initial agenda, given by prediction, and the inference rules
|
||||
parse :: (Ord t, Ord n, Ord c, Ord l) => MCFParser c n l t
|
||||
parse pinfo starts toks
|
||||
= accumAssoc groupSyntaxNodes $
|
||||
[ ((cat, makeRangeRec lins), SNode fun (zip rhs rrecs)) |
|
||||
Active (Abs cat _Nil fun, rhs) lins rrecs <- chartLookup chart Final ]
|
||||
where chart = process pinfo toks
|
||||
|
||||
-- | Builds a chart from the initial agenda, given by prediction, and the inference rules
|
||||
-- parseR :: (Ord t, Ord n, Ord c, Ord l) => MCFParser c n l t
|
||||
parseR pinfo starts
|
||||
= accumAssoc groupSyntaxNodes $
|
||||
[ ((cat, makeRangeRec lins), SNode fun (zip rhs rrecs)) |
|
||||
Active (Abs cat _Nil fun, rhs) lins rrecs <- chartLookup chart Final ]
|
||||
where chart = processR pinfo
|
||||
|
||||
process :: (Ord t, Ord n, Ord c, Ord l) => MCFPInfo c n l t -> Input t -> NChart c n l
|
||||
process pinfo toks
|
||||
= tracePrt "MCFG.Naive - chart size" prtSizes $
|
||||
buildChart keyof [convert, combine] (predict pinfo toks)
|
||||
|
||||
processR :: (Ord n, Ord c, Ord l) => MCFPInfo c n l Range -> NChart c n l
|
||||
processR pinfo
|
||||
= tracePrt "MCFG.Naive Range - chart size" prtSizes $
|
||||
buildChart keyof [convert, combine] (predictR pinfo)
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- * inference rules
|
||||
|
||||
-- Creates an Active Item of every Rule in the Grammar to give the initial Agenda
|
||||
predict :: (Ord l, Ord t) => MCFPInfo c n l t -> Input t -> [Item c n l]
|
||||
predict pinfo toks = tracePrt "MCFG.Naive - predicted rules" (prt . length) $
|
||||
do Rule abs (Cnc _ _ lins) <- rulesMatchingInput pinfo toks
|
||||
lins' <- rangeRestRec toks lins
|
||||
return $ Active (abs, []) lins' []
|
||||
|
||||
-- Creates an Active Item of every Rule in the Grammar to give the initial Agenda
|
||||
predictR :: (Ord l) => MCFPInfo c n l Range -> [Item c n l]
|
||||
predictR pinfo = tracePrt "MCFG.Naive Range - predicted rules" (prt . length) $
|
||||
do Rule abs (Cnc _ _ lins) <- allRules pinfo
|
||||
return $ Active (abs, []) lins []
|
||||
|
||||
-- | Creates an Active Item every time it is possible to combine
|
||||
-- an Active Item from the agenda with a Passive Item from the Chart
|
||||
combine :: (Ord n, Ord c, Ord l) => NChart c n l -> Item c n l -> [Item c n l]
|
||||
combine chart item@(Active (Abs _ (c:_) _, _) _ _) =
|
||||
do Passive _c rrec <- chartLookup chart (Pass c)
|
||||
combine2 chart rrec item
|
||||
combine chart (Passive c rrec) =
|
||||
do item <- chartLookup chart (Act c)
|
||||
combine2 chart rrec item
|
||||
combine _ _ = []
|
||||
|
||||
combine2 chart rrec (Active (Abs nt (c:find) f, found) lins rrecs) =
|
||||
do lins' <- substArgRec (length found) rrec lins
|
||||
return $ Active (Abs nt find f, found ++ [c]) lins' (rrecs ++ [rrec])
|
||||
|
||||
-- | Active Items with nothing to find are converted to Passive Items
|
||||
convert :: (Ord n, Ord c, Ord l) => NChart c n l -> Item c n l -> [Item c n l]
|
||||
convert _ (Active (Abs cat [] fun, _) lins _) = [Passive cat (makeRangeRec lins)]
|
||||
convert _ _ = []
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- * type definitions
|
||||
|
||||
type NChart c n l = ParseChart (Item c n l) (NKey c)
|
||||
|
||||
data Item c n l = Active (DottedRule c n) (LinRec c l Range) [RangeRec l]
|
||||
| Passive c (RangeRec l)
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
type DottedRule c n = (Abstract c n, [c])
|
||||
|
||||
data NKey c = Act c
|
||||
| Pass c
|
||||
| Final
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
keyof :: Item c n l -> NKey c
|
||||
keyof (Active (Abs _ (next:_) _, _) _ _) = Act next
|
||||
keyof (Passive cat _) = Pass cat
|
||||
keyof _ = Final
|
||||
|
||||
-- for tracing purposes
|
||||
prtSizes chart = "final=" ++ show (length (chartLookup chart Final)) ++
|
||||
", passive=" ++ show (sum [length (chartLookup chart k) |
|
||||
k@(Pass _) <- chartKeys chart ]) ++
|
||||
", active=" ++ show (sum [length (chartLookup chart k) |
|
||||
k@(Act _) <- chartKeys chart ])
|
||||
|
||||
prtChart chart = concat [ "\n*** KEY: " ++ prt k ++
|
||||
prtBefore "\n " (chartLookup chart k) |
|
||||
k <- chartKeys chart ]
|
||||
|
||||
instance (Print c, Print n, Print l) => Print (Item c n l) where
|
||||
prt (Active (abs, cs) lrec rrecs) = "? " ++ prt abs ++ " . " ++ prtSep " " cs ++ ";\n\t" ++
|
||||
"{" ++ prtSep " " lrec ++ "}" ++
|
||||
( if null rrecs then ";" else ";\n\t" ++
|
||||
"{" ++ prtSep "} {" (map (prtSep " ") rrecs) ++ "}" )
|
||||
prt (Passive c rrec) = "- " ++ prt c ++ "; {" ++ prtSep " " rrec ++ "}"
|
||||
|
||||
instance Print c => Print (NKey c) where
|
||||
prt (Act c) = "Active " ++ prt c
|
||||
prt (Pass c) = "Passive " ++ prt c
|
||||
prt (Final) = "Final"
|
||||
|
||||
|
||||
162
src-3.0/GF/Parsing/MCFG/PInfo.hs
Normal file
162
src-3.0/GF/Parsing/MCFG/PInfo.hs
Normal file
@@ -0,0 +1,162 @@
|
||||
---------------------------------------------------------------------
|
||||
-- |
|
||||
-- Maintainer : PL
|
||||
-- Stability : (stable)
|
||||
-- Portability : (portable)
|
||||
--
|
||||
-- > CVS $Date: 2005/05/13 12:40:19 $
|
||||
-- > CVS $Author: peb $
|
||||
-- > CVS $Revision: 1.5 $
|
||||
--
|
||||
-- MCFG parsing, parser information
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
module GF.Parsing.MCFG.PInfo where
|
||||
|
||||
import GF.System.Tracing
|
||||
import GF.Infra.Print
|
||||
|
||||
import GF.Formalism.Utilities
|
||||
import GF.Formalism.GCFG
|
||||
import GF.Formalism.MCFG
|
||||
import GF.Data.SortedList
|
||||
import GF.Data.Assoc
|
||||
import GF.Parsing.MCFG.Range
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- type declarations
|
||||
|
||||
-- | the list of categories = possible starting categories
|
||||
type MCFParser c n l t = MCFPInfo c n l t
|
||||
-> [c]
|
||||
-> Input t
|
||||
-> SyntaxChart n (c, RangeRec l)
|
||||
|
||||
makeFinalEdge :: c -> l -> (Int, Int) -> (c, RangeRec l)
|
||||
makeFinalEdge cat lbl bnds = (cat, [(lbl, makeRange bnds)])
|
||||
|
||||
|
||||
------------------------------------------------------------
|
||||
-- parser information
|
||||
|
||||
data MCFPInfo c n l t
|
||||
= MCFPInfo { grammarTokens :: SList t
|
||||
, nameRules :: Assoc n (SList (MCFRule c n l t))
|
||||
, topdownRules :: Assoc c (SList (MCFRule c n l t))
|
||||
-- ^ used in 'GF.Parsing.MCFG.Active' (Earley):
|
||||
, epsilonRules :: [MCFRule c n l t]
|
||||
-- ^ used in 'GF.Parsing.MCFG.Active' (Kilbury):
|
||||
, leftcornerCats :: Assoc c (SList (MCFRule c n l t))
|
||||
, leftcornerTokens :: Assoc t (SList (MCFRule c n l t))
|
||||
-- ^ used in 'GF.Parsing.MCFG.Active' (Kilbury):
|
||||
, grammarCats :: SList c
|
||||
-- ^ used when calculating starting categories
|
||||
, rulesByToken :: Assoc t (SList (MCFRule c n l t, SList t))
|
||||
, rulesWithoutTokens :: SList (MCFRule c n l t)
|
||||
-- ^ used by 'rulesMatchingInput'
|
||||
, allRules :: MCFGrammar c n l t
|
||||
-- ^ used by any unoptimized algorithm
|
||||
|
||||
--bottomupRules :: Assoc (Symbol c t) (SList (CFRule c n t)),
|
||||
--emptyLeftcornerRules :: Assoc c (SList (CFRule c n t)),
|
||||
--emptyCategories :: Set c,
|
||||
}
|
||||
|
||||
|
||||
rangeRestrictPInfo :: (Ord c, Ord n, Ord l, Ord t) =>
|
||||
MCFPInfo c n l t -> Input t -> MCFPInfo c n l Range
|
||||
rangeRestrictPInfo (pinfo{-::MCFPInfo c n l t-}) inp =
|
||||
tracePrt "MCFG.PInfo - Restricting the parser information" (prt . grammarTokens)
|
||||
MCFPInfo { grammarTokens = nubsort (map edgeRange (inputEdges inp))
|
||||
, nameRules = rrAssoc (nameRules pinfo)
|
||||
, topdownRules = rrAssoc (topdownRules pinfo)
|
||||
, epsilonRules = rrRules (epsilonRules pinfo)
|
||||
, leftcornerCats = rrAssoc (leftcornerCats pinfo)
|
||||
, leftcornerTokens = lctokens
|
||||
, grammarCats = grammarCats pinfo
|
||||
, rulesByToken = emptyAssoc -- error "MCFG.PInfo.rulesByToken - no range restriction"
|
||||
, rulesWithoutTokens = [] -- error "MCFG.PInfo.rulesByToken - no range restriction"
|
||||
, allRules = allrules -- rrRules (allRules pinfo)
|
||||
}
|
||||
|
||||
where lctokens = accumAssoc id
|
||||
[ (rng, rule) | (tok, rules) <- aAssocs (leftcornerTokens pinfo),
|
||||
inputToken inp ?= tok,
|
||||
rule@(Rule _ (Cnc _ _ (Lin _ (Tok rng:_) : _)))
|
||||
<- concatMap (rangeRestrictRule inp) rules ]
|
||||
|
||||
allrules = rrRules $ rulesMatchingInput pinfo inp
|
||||
|
||||
rrAssoc assoc = filterNull $ fmap rrRules assoc
|
||||
filterNull assoc = assocFilter (not . null) assoc
|
||||
rrRules rules = concatMap (rangeRestrictRule inp) rules
|
||||
|
||||
|
||||
buildMCFPInfo :: (Ord c, Ord n, Ord l, Ord t) => MCFGrammar c n l t -> MCFPInfo c n l t
|
||||
buildMCFPInfo grammar =
|
||||
traceCalcFirst grammar $
|
||||
tracePrt "MCFG.PInfo - parser info" (prt) $
|
||||
MCFPInfo { grammarTokens = grammartokens
|
||||
, nameRules = namerules
|
||||
, topdownRules = topdownrules
|
||||
, epsilonRules = epsilonrules
|
||||
, leftcornerCats = leftcorncats
|
||||
, leftcornerTokens = leftcorntoks
|
||||
, grammarCats = grammarcats
|
||||
, rulesByToken = rulesbytoken
|
||||
, rulesWithoutTokens = ruleswithouttokens
|
||||
, allRules = allrules
|
||||
}
|
||||
|
||||
where allrules = concatMap expandVariants grammar
|
||||
grammartokens = union (map fst ruletokens)
|
||||
namerules = accumAssoc id
|
||||
[ (name, rule) | rule@(Rule (Abs _ _ name) _) <- allrules ]
|
||||
topdownrules = accumAssoc id
|
||||
[ (cat, rule) | rule@(Rule (Abs cat _ _) _) <- allrules ]
|
||||
epsilonrules = [ rule | rule@(Rule _ (Cnc _ _ (Lin _ [] : _))) <- allrules ]
|
||||
leftcorncats = accumAssoc id
|
||||
[ (cat, rule) |
|
||||
rule@(Rule _ (Cnc _ _ (Lin _ (Cat(cat,_,_):_) : _))) <- allrules ]
|
||||
leftcorntoks = accumAssoc id
|
||||
[ (tok, rule) |
|
||||
rule@(Rule _ (Cnc _ _ (Lin _ (Tok tok:_) : _))) <- allrules ]
|
||||
grammarcats = aElems topdownrules
|
||||
ruletokens = [ (toksoflins lins, rule) |
|
||||
rule@(Rule _ (Cnc _ _ lins)) <- allrules ]
|
||||
toksoflins lins = nubsort [ tok | Lin _ syms <- lins, Tok tok <- syms ]
|
||||
rulesbytoken = accumAssoc id
|
||||
[ (tok, (rule, toks)) | (tok:toks, rule) <- ruletokens ]
|
||||
ruleswithouttokens = nubsort [ rule | ([], rule) <- ruletokens ]
|
||||
|
||||
|
||||
-- | return only the rules for which all tokens are in the input string
|
||||
rulesMatchingInput :: Ord t => MCFPInfo c n l t -> Input t -> [MCFRule c n l t]
|
||||
rulesMatchingInput pinfo inp =
|
||||
[ rule | tok <- toks,
|
||||
(rule, ruletoks) <- rulesByToken pinfo ? tok,
|
||||
ruletoks `subset` toks ]
|
||||
++ rulesWithoutTokens pinfo
|
||||
where toks = aElems (inputToken inp)
|
||||
|
||||
|
||||
----------------------------------------------------------------------
|
||||
-- pretty-printing of statistics
|
||||
|
||||
instance (Ord c, Ord n, Ord l, Ord t) => Print (MCFPInfo c n l t) where
|
||||
prt pI = "[ tokens=" ++ sl grammarTokens ++
|
||||
"; categories=" ++ sl grammarCats ++
|
||||
"; nameRules=" ++ sla nameRules ++
|
||||
"; tdRules=" ++ sla topdownRules ++
|
||||
"; epsilonRules=" ++ sl epsilonRules ++
|
||||
"; lcCats=" ++ sla leftcornerCats ++
|
||||
"; lcTokens=" ++ sla leftcornerTokens ++
|
||||
"; byToken=" ++ sla rulesByToken ++
|
||||
"; noTokens=" ++ sl rulesWithoutTokens ++
|
||||
"; allRules=" ++ sl allRules ++
|
||||
" ]"
|
||||
|
||||
where sl f = show $ length $ f pI
|
||||
sla f = let (as, bs) = unzip $ aAssocs $ f pI
|
||||
in show (length as) ++ "/" ++ show (length (concat bs))
|
||||
|
||||
206
src-3.0/GF/Parsing/MCFG/Range.hs
Normal file
206
src-3.0/GF/Parsing/MCFG/Range.hs
Normal file
@@ -0,0 +1,206 @@
|
||||
---------------------------------------------------------------------
|
||||
-- |
|
||||
-- Maintainer : PL
|
||||
-- Stability : (stable)
|
||||
-- Portability : (portable)
|
||||
--
|
||||
-- > CVS $Date: 2005/08/08 09:01:25 $
|
||||
-- > CVS $Author: peb $
|
||||
-- > CVS $Revision: 1.5 $
|
||||
--
|
||||
-- Definitions of ranges, and operations on ranges
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
module GF.Parsing.MCFG.Range
|
||||
( Range(..), makeRange, concatRange, rangeEdge, edgeRange, minRange, maxRange,
|
||||
LinRec, RangeRec,
|
||||
makeRangeRec, rangeRestRec, rangeRestrictRule,
|
||||
projection, unifyRec, substArgRec
|
||||
) where
|
||||
|
||||
|
||||
-- Haskell
|
||||
import Data.List
|
||||
import Control.Monad
|
||||
|
||||
-- GF modules
|
||||
import GF.Formalism.GCFG
|
||||
import GF.Formalism.MCFG
|
||||
import GF.Formalism.Utilities
|
||||
import GF.Infra.Print
|
||||
import GF.Data.Assoc ((?))
|
||||
import GF.Data.Utilities (updateNthM)
|
||||
|
||||
------------------------------------------------------------
|
||||
-- ranges as single pairs
|
||||
|
||||
data Range = Range (Int, Int)
|
||||
| EmptyRange
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
makeRange :: (Int, Int) -> Range
|
||||
concatRange :: Range -> Range -> [Range]
|
||||
rangeEdge :: a -> Range -> Edge a
|
||||
edgeRange :: Edge a -> Range
|
||||
minRange :: Range -> Int
|
||||
maxRange :: Range -> Int
|
||||
|
||||
makeRange = Range
|
||||
concatRange EmptyRange rng = return rng
|
||||
concatRange rng EmptyRange = return rng
|
||||
concatRange (Range(i,j)) (Range(j',k)) = [ Range(i,k) | j==j']
|
||||
rangeEdge a (Range(i,j)) = Edge i j a
|
||||
edgeRange (Edge i j _) = Range (i,j)
|
||||
minRange (Range rho) = fst rho
|
||||
maxRange (Range rho) = snd rho
|
||||
|
||||
instance Print Range where
|
||||
prt (Range (i,j)) = "(" ++ show i ++ "-" ++ show j ++ ")"
|
||||
prt (EmptyRange) = "(?)"
|
||||
|
||||
{-- Types --------------------------------------------------------------------
|
||||
Linearization- and Range records implemented as lists
|
||||
-----------------------------------------------------------------------------}
|
||||
|
||||
type LinRec c l t = [Lin c l t]
|
||||
|
||||
type RangeRec l = [(l, Range)]
|
||||
|
||||
|
||||
{-- Functions ----------------------------------------------------------------
|
||||
Concatenation : Concatenation of Ranges, Symbols and Linearizations
|
||||
and records of Linearizations
|
||||
Record transformation : Makes a Range record from a fully instantiated
|
||||
Linearization record
|
||||
Record projection : Given a label, returns the corresponding Range
|
||||
Range restriction : Range restriction of Tokens, Symbols,
|
||||
Linearizations and Records given a list of Tokens
|
||||
Record replacment : Substitute a record for another in a list of Range
|
||||
records
|
||||
Argument substitution : Substitution of a Cat c to a Tok Range, where
|
||||
Range is the cover of c
|
||||
Note: The argument is still a Symbol c Range
|
||||
Subsumation : Checks if a Range record subsumes another Range
|
||||
record
|
||||
Record unification : Unification of two Range records
|
||||
-----------------------------------------------------------------------------}
|
||||
|
||||
|
||||
--- Concatenation ------------------------------------------------------------
|
||||
|
||||
|
||||
concSymbols :: [Symbol c Range] -> [[Symbol c Range]]
|
||||
concSymbols (Tok rng:Tok rng':toks) = do rng'' <- concatRange rng rng'
|
||||
concSymbols (Tok rng'':toks)
|
||||
concSymbols (sym:syms) = do syms' <- concSymbols syms
|
||||
return (sym:syms')
|
||||
concSymbols [] = return []
|
||||
|
||||
|
||||
concLin :: Lin c l Range -> [Lin c l Range]
|
||||
concLin (Lin lbl syms) = do syms' <- concSymbols syms
|
||||
return (Lin lbl syms')
|
||||
|
||||
|
||||
concLinRec :: LinRec c l Range -> [LinRec c l Range]
|
||||
concLinRec = mapM concLin
|
||||
|
||||
|
||||
--- Record transformation ----------------------------------------------------
|
||||
|
||||
makeRangeRec :: LinRec c l Range -> RangeRec l
|
||||
makeRangeRec lins = map convLin lins
|
||||
where convLin (Lin lbl [Tok rng]) = (lbl, rng)
|
||||
convLin (Lin lbl []) = (lbl, EmptyRange)
|
||||
convLin _ = error "makeRangeRec"
|
||||
|
||||
|
||||
--- Record projection --------------------------------------------------------
|
||||
|
||||
projection :: Ord l => l -> RangeRec l -> [Range]
|
||||
projection l rec = maybe (fail "projection") return $ lookup l rec
|
||||
|
||||
|
||||
--- Range restriction --------------------------------------------------------
|
||||
|
||||
rangeRestTok :: Ord t => Input t -> t -> [Range]
|
||||
rangeRestTok toks tok = do rng <- inputToken toks ? tok
|
||||
return (makeRange rng)
|
||||
|
||||
|
||||
rangeRestSym :: Ord t => Input t -> Symbol a t -> [Symbol a Range]
|
||||
rangeRestSym toks (Tok tok) = do rng <- rangeRestTok toks tok
|
||||
return (Tok rng)
|
||||
rangeRestSym _ (Cat c) = return (Cat c)
|
||||
|
||||
|
||||
rangeRestLin :: Ord t => Input t -> Lin c l t -> [Lin c l Range]
|
||||
rangeRestLin toks (Lin lbl syms) = do syms' <- mapM (rangeRestSym toks) syms
|
||||
concLin (Lin lbl syms')
|
||||
-- return (Lin lbl syms')
|
||||
|
||||
|
||||
rangeRestRec :: Ord t => Input t -> LinRec c l t -> [LinRec c l Range]
|
||||
rangeRestRec toks = mapM (rangeRestLin toks)
|
||||
|
||||
|
||||
rangeRestrictRule :: Ord t => Input t -> MCFRule c n l t -> [MCFRule c n l Range]
|
||||
rangeRestrictRule toks (Rule abs (Cnc l ls lins)) = liftM (Rule abs . Cnc l ls) $
|
||||
rangeRestRec toks lins
|
||||
|
||||
--- Argument substitution ----------------------------------------------------
|
||||
|
||||
substArgSymbol :: Ord l => Int -> RangeRec l -> Symbol (c, l, Int) Range
|
||||
-> Symbol (c, l, Int) Range
|
||||
substArgSymbol i rec tok@(Tok rng) = tok
|
||||
substArgSymbol i rec cat@(Cat (c, l, j))
|
||||
| i==j = maybe err Tok $ lookup l rec
|
||||
| otherwise = cat
|
||||
where err = error "substArg: Label not in range-record"
|
||||
|
||||
substArgLin :: Ord l => Int -> RangeRec l -> Lin c l Range
|
||||
-> [Lin c l Range]
|
||||
substArgLin i rec (Lin lbl syms) =
|
||||
concLin (Lin lbl (map (substArgSymbol i rec) syms))
|
||||
|
||||
|
||||
substArgRec :: Ord l => Int -> RangeRec l -> LinRec c l Range
|
||||
-> [LinRec c l Range]
|
||||
substArgRec i rec lins = mapM (substArgLin i rec) lins
|
||||
|
||||
|
||||
-- Record unification & replacment ---------------------------------------------------------
|
||||
|
||||
unifyRec :: Ord l => [RangeRec l] -> Int -> RangeRec l -> [[RangeRec l]]
|
||||
unifyRec recs i rec = updateNthM update i recs
|
||||
where update rec' = guard (subsumes rec' rec) >> return rec
|
||||
|
||||
-- unifyRec recs i rec = do guard $ subsumes (recs !! i) rec
|
||||
-- return $ replaceRec recs i rec
|
||||
|
||||
replaceRec :: [RangeRec l] -> Int -> RangeRec l -> [RangeRec l]
|
||||
replaceRec recs i rec = before ++ (rec : after)
|
||||
where (before, _ : after) = splitAt i recs
|
||||
|
||||
subsumes :: Ord l => RangeRec l -> RangeRec l -> Bool
|
||||
subsumes rec rec' = and [r `elem` rec' | r <- rec]
|
||||
-- subsumes rec rec' = all (`elem` rec') rec
|
||||
|
||||
|
||||
{-
|
||||
--- Record unification -------------------------------------------------------
|
||||
unifyRangeRecs :: Ord l => [RangeRec l] -> [RangeRec l] -> [[RangeRec l]]
|
||||
unifyRangeRecs recs recs' = zipWithM unify recs recs'
|
||||
where unify :: Ord l => RangeRec l -> RangeRec l -> [RangeRec l]
|
||||
unify rec [] = return rec
|
||||
unify [] rec = return rec
|
||||
unify rec1'@(p1@(l1, r1):rec1) rec2'@(p2@(l2, r2):rec2)
|
||||
= case compare l1 l2 of
|
||||
LT -> do rec3 <- unify rec1 rec2'
|
||||
return (p1:rec3)
|
||||
GT -> do rec3 <- unify rec1' rec2
|
||||
return (p2:rec3)
|
||||
EQ -> do guard (r1 == r2)
|
||||
rec3 <- unify rec1 rec2
|
||||
return (p1:rec3)
|
||||
-}
|
||||
186
src-3.0/GF/Parsing/MCFG/ViaCFG.hs
Normal file
186
src-3.0/GF/Parsing/MCFG/ViaCFG.hs
Normal file
@@ -0,0 +1,186 @@
|
||||
----------------------------------------------------------------------
|
||||
-- |
|
||||
-- Maintainer : PL
|
||||
-- Stability : (stable)
|
||||
-- Portability : (portable)
|
||||
--
|
||||
-- > CVS $Date: 2005/08/08 09:01:25 $
|
||||
-- > CVS $Author: peb $
|
||||
-- > CVS $Revision: 1.4 $
|
||||
--
|
||||
-- MCFG parsing, through context-free approximation
|
||||
-----------------------------------------------------------------------------
|
||||
|
||||
module GF.Parsing.MCFG.ViaCFG where
|
||||
|
||||
|
||||
-- Haskell modules
|
||||
import Data.List
|
||||
import Control.Monad
|
||||
|
||||
-- GF modules
|
||||
import ConvertMCFGtoDecoratedCFG
|
||||
import qualified DecoratedCFParser as CFP
|
||||
import qualified DecoratedGrammar as CFG
|
||||
import Examples
|
||||
import GF.OldParsing.GeneralChart
|
||||
import qualified GF.OldParsing.MCFGrammar as MCFG
|
||||
import MCFParser
|
||||
import Nondet
|
||||
import Parser
|
||||
import GF.Parsing.MCFG.Range
|
||||
|
||||
|
||||
{-- Datatypes -----------------------------------------------------------------
|
||||
Chart
|
||||
Item
|
||||
Key
|
||||
|
||||
|
||||
Item : Four different Items are used. PreMCFG for MCFG Pre Items, Pre are
|
||||
the Items returned by the pre-Functions and Mark are the
|
||||
corresponding Items for the mark-Functions. For convenience correctly
|
||||
marked Mark Items are converted to Passive Items.
|
||||
I use dottedrule for convenience to keep track of wich daughter's RangeRec to look for.
|
||||
AChart: A RedBlackMap with Items and Keys
|
||||
AKey :
|
||||
------------------------------------------------------------------------------}
|
||||
|
||||
--Ev ta bort några typer av Item och bara nyckla på det som är unikt för den typen...
|
||||
data Item n c l = PreMCFG (n, c) (RangeRec l) [RangeRec l]
|
||||
| Pre (n, c) (RangeRec l) [l] [RangeRec l]
|
||||
| Mark (n, c) (RangeRec l) (RangeRec l) [RangeRec l]
|
||||
| Passive (n, c) (RangeRec l) (RangeRec l)
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
type AChart n c l = ParseChart (Item n c l) (AKey n c l)
|
||||
|
||||
data AKey n c l = Pr (n, c) l
|
||||
| Pm (n, c) l
|
||||
| Mk (RangeRec l)
|
||||
| Ps (RangeRec l)
|
||||
| Useless
|
||||
deriving (Eq, Ord, Show)
|
||||
|
||||
|
||||
{-- Parsing -------------------------------------------------------------------
|
||||
recognize:
|
||||
parse : The Agenda consists of the Passive Items from context-free
|
||||
approximation (as PreMCFG Items) and the Pre Items inferred by
|
||||
pre-prediction.
|
||||
keyof : Given an Item returns an appropriate Key for the Chart
|
||||
------------------------------------------------------------------------------}
|
||||
|
||||
recognize strategy mcfg toks = chartMember (parse strategy mcfg toks)
|
||||
(Passive ("f", S)
|
||||
[("s" , MCFG.Range (0, n))]
|
||||
[("p" , MCFG.Range (0, n2)), ("q", MCFG.Range (n2, n))])
|
||||
(Ps [("s" , MCFG.Range (0, n))])
|
||||
where n = length toks
|
||||
n2 = n `div` 2
|
||||
|
||||
|
||||
--parse :: (Ord n, Ord NT, Ord String, Eq t) => CFP.Strategy -> MCFG.Grammar n NT String t -> [t]
|
||||
-- -> AChart n NT String
|
||||
parse strategy mcfg toks
|
||||
= buildChart keyof
|
||||
[preCombine, markPredict, markCombine, convert]
|
||||
(makePreItems (CFP.parse strategy (CFG.pInfo (convertGrammar mcfg)) [(S, "s")] toks) ++
|
||||
(prePredict mcfg))
|
||||
|
||||
|
||||
keyof :: Item n c l -> AKey n c l
|
||||
keyof (PreMCFG head [(lbl, rng)] _) = Pm head lbl
|
||||
keyof (Pre head _ (lbl:lbls) _) = Pr head lbl
|
||||
keyof (Mark _ _ _ (rec:recs)) = Mk rec
|
||||
keyof (Passive _ rec _) = Ps rec
|
||||
keyof _ = Useless
|
||||
|
||||
|
||||
{-- Initializing agenda -------------------------------------------------------
|
||||
makePreItems:
|
||||
------------------------------------------------------------------------------}
|
||||
|
||||
makePreItems :: (Eq c, Ord i) => CFG.Grammar n (Edge (c, l)) i t -> [Item n c l]
|
||||
makePreItems cfchart
|
||||
= [ PreMCFG (fun, cat) [(lbl, MCFG.makeRange (i, j))] (symToRec beta) |
|
||||
CFG.Rule (Edge i j (cat,lbl)) beta fun <- cfchart ]
|
||||
|
||||
|
||||
prePredict :: (Ord n, Ord c, Ord l) => MCFG.Grammar n c l t -> [Item n c l]
|
||||
prePredict mcfg =
|
||||
[ Pre (f, nt) [] (getLables lins) (replicate (nrOfCats (head lins)) []) |
|
||||
MCFG.Rule nt nts lins f <- mcfg ]
|
||||
|
||||
|
||||
{-- Inference rules ---------------------------------------------------------
|
||||
prePredict :
|
||||
preCombine :
|
||||
markPredict:
|
||||
markCombine:
|
||||
convert :
|
||||
----------------------------------------------------------------------------}
|
||||
|
||||
preCombine :: (Ord n, Ord c, Ord l) => ParseChart (Item n c l) (AKey n c l)
|
||||
-> Item n c l -> [Item n c l]
|
||||
preCombine chart (Pre head rec (l:ls) recs) =
|
||||
[ Pre head (rec ++ [(l, r)]) ls recs'' |
|
||||
PreMCFG head [(l, r)] recs' <- chartLookup chart (Pm head l),
|
||||
recs'' <- solutions (unifyRangeRecs recs recs') ]
|
||||
preCombine chart (PreMCFG head [(l, r)] recs) =
|
||||
[ Pre head (rec ++ [(l, r)]) ls recs'' |
|
||||
Pre head rec (l:ls) recs' <- chartLookup chart (Pr head l),
|
||||
recs'' <- solutions (unifyRangeRecs recs recs') ]
|
||||
preCombine _ _ = []
|
||||
|
||||
|
||||
markPredict :: (Ord n, Ord c, Ord l) => ParseChart (Item n c l) (AKey n c l)
|
||||
-> Item n c l -> [Item n c l]
|
||||
markPredict _ (Pre (n, c) rec [] recs) = [Mark (n, c) rec [] recs]
|
||||
markPredict _ _ = []
|
||||
|
||||
|
||||
markCombine :: (Ord n, Ord c, Ord l) => ParseChart (Item n c l) (AKey n c l)
|
||||
-> Item n c l -> [Item n c l]
|
||||
markCombine chart (Mark (f, c) rec mRec (r:recs)) =
|
||||
[ Mark (f, c) rec (mRec ++ r) recs |
|
||||
Passive _ r _ <- chartLookup chart (Ps r)]
|
||||
markCombine chart (Passive _ r _) =
|
||||
[ Mark (f, c) rec (mRec++r) recs |
|
||||
Mark (f, c) rec mRec (r:recs) <- chartLookup chart (Mk r) ]
|
||||
markCombine _ _ = []
|
||||
|
||||
|
||||
convert :: (Ord n, Ord c, Ord l) => ParseChart (Item n c l) (AKey n c l)
|
||||
-> Item n c l -> [Item n c l]
|
||||
convert _ (Mark (f, c) r rec []) = [Passive (f, c) r rec]
|
||||
convert _ _ = []
|
||||
|
||||
|
||||
{-- Help functions ----------------------------------------------------------------
|
||||
getRHS :
|
||||
getLables:
|
||||
symToRec :
|
||||
----------------------------------------------------------------------------------}
|
||||
|
||||
-- FULKOD !
|
||||
nrOfCats :: Eq c => MCFG.Lin c l t -> Int
|
||||
nrOfCats (MCFG.Lin l syms) = length $ nub [(c, i) | Cat (c, l, i) <- syms]
|
||||
|
||||
|
||||
--
|
||||
getLables :: LinRec c l t -> [l]
|
||||
getLables lins = [l | MCFG.Lin l syms <- lins]
|
||||
|
||||
|
||||
--
|
||||
symToRec :: Ord i => [Symbol (Edge (c, l), i) d] -> [[(l, MCFG.Range)]]
|
||||
symToRec beta = map makeLblRng $ groupBy (\(_, d) (_, d') -> (d == d'))
|
||||
$ sortBy sBd [(Edge i j (c, l) , d) | Cat (Edge i j (c, l), d)
|
||||
<- beta]
|
||||
where makeLblRng edges = [(l, (MCFG.makeRange (i, j))) | (Edge i j (_, l), _)
|
||||
<- edges]
|
||||
sBd (_, d) (_, d')
|
||||
| d < d' = LT
|
||||
| d > d' = GT
|
||||
| otherwise = EQ
|
||||
Reference in New Issue
Block a user