"Committed_by_peb"

1 files changed, 0 insertions, 143 deletions

diff --git a/src/GF/Parsing/CFParserIncremental.hs b/src/GF/Parsing/CFParserIncremental.hs
deleted file mode 100644
index 3b9951721..000000000
--- a/src/GF/Parsing/CFParserIncremental.hs
+++ /dev/null
@@ -1,143 +0,0 @@
-----------------------------------------------------------------------
--- |
--- Module      : CFParserIncremental
--- Maintainer  : PL
--- Stability   : (stable)
--- Portability : (portable)
---
--- > CVS $Date: 2005/03/21 14:17:41 $ 
--- > CVS $Author: peb $
--- > CVS $Revision: 1.1 $
---
--- Incremental chart parsing for context-free grammars
------------------------------------------------------------------------------
-
- 
-
-module GF.Parsing.CFParserIncremental (parse,
-			    Strategy) where
-
-import Tracing
-import GF.Printing.PrintParser
-
--- haskell modules:
-import Array
--- gf modules:
-import GF.Data.SortedList
-import GF.Data.Assoc
-import Operations
--- parser modules:
-import GF.Parsing.Parser
-import GF.Conversion.CFGrammar
-import GF.Parsing.IncrementalChart
-
-
-type Strategy = ((Bool, Bool), (Bool, Bool)) -- (predict:(BU, TD), filter:(BU, TD))
-
-parse :: (Ord n, Ord c, Ord t, Show t) => 
-	 Strategy -> CFParser n c t
-parse ((isPredictBU, isPredictTD), (isFilterBU, isFilterTD)) grammar start input =
-    trace2 "CFParserIncremental" 
-	       ((if isPredictBU then "BU-predict " else "") ++
-		(if isPredictTD then "TD-predict " else "") ++
-		(if isFilterBU  then "BU-filter " else "") ++
-		(if isFilterTD  then "TD-filter " else "")) $
-    trace2 "input" (show (inputTo input)) $
-    finalEdges
-    where finalEdges = [ Edge j k (Rule cat (reverse found) name) |
-			 (k, state) <- 
-			   tracePrt "#passiveChart"
-			   (prt . map (length . (?Passive) . snd)) $
-			   tracePrt "#activeChart" 
-			   (prt . map (length . concatMap snd . aAssocs . snd)) $
-			   assocs finalChart,
-			 Item j (Rule cat _Nil name) found <- state ? Passive ]
-
-	  finalChart = buildChart keyof rules axioms $ inputBounds input
-
-          axioms 0 = --tracePrt ("axioms 0") (prtSep "\n") $
-		     union $ map (tdInfer 0) start
-	  axioms k = --tracePrt ("axioms "++show k) (prtSep "\n") $
-		     union [ buInfer j k (Tok token) |
-			     (token, js) <- aAssocs (inputTo input ! k), j <- js ]
-
-          rules k (Item j (Rule cat [] _) _)
-	      = buInfer j k (Cat cat)
-          rules k (Item j rule@(Rule _ (Cat next:_) _) found) 
-	      = tdInfer k next <++> 
-	        -- hack for empty rules:
-		[ Item j (forward rule) (Cat next:found) | 
-		  emptyCategories grammar ?= next ]
-	  rules _ _ = []
-
-          buInfer j k next = --tracePrt ("buInfer "++show(j,k)++" "++prt next) (prtSep "\n") $
-			     buPredict j k next <++> buCombine j k next 
-          tdInfer   k next = tdPredict   k next
-
-	  -- the combine rule
-          buCombine j k next
-	      | j == k    = [] -- hack for empty rules
-	      | otherwise = [ Item i (forward rule) (next:found) | 
-			      Item i rule found <- (finalChart ! j) ? Active next ]
-
-	  -- kilbury bottom-up prediction
-          buPredict j k next
-	      = [ Item j rule [next] | isPredictBU,
-		  rule <- map forward $ --tracePrt ("buRules "++prt next) (prtSep "\n") $
-		                        bottomupRules grammar ? next,
-		  buFilter rule k, 
-		  tdFilter rule j k ]
-
-	  -- top-down prediction
-          tdPredict k cat
-	      = [ Item k rule [] | isPredictTD || isFilterTD,
-		  rule <- topdownRules grammar ? cat,
-		  buFilter rule k ] <++>
-		-- hack for empty rules:
-		[ Item k rule [] | isPredictBU,
-		  rule <- emptyLeftcornerRules grammar ? cat ]
-
-          -- bottom up filtering: input symbol k can begin the given symbol list (first set)
-	  -- leftcornerTokens DOESN'T WORK WITH EMPTY RULES!!!
-	  buFilter (Rule _ (Cat cat:_) _) k | isFilterBU
-	      = k < snd (inputBounds input) && 
-		hasCommonElements (leftcornerTokens grammar ? cat) 
-				      (aElems (inputFrom input ! k))
-	  buFilter _ _ = True
-
-          -- top down filtering: 'cat' is reachable by an active edge ending in node j < k
-          tdFilter (Rule cat _ _) j k | isFilterTD && j < k
-					  = (tdFilters ! j) ?= cat
-	  tdFilter _ _ _ = True
-
-	  tdFilters    = listArray (inputBounds input) $ 
-			 map (listSet . limit leftCats . activeCats) [0..]
-	  activeCats j = [ next | Active (Cat next) <- aElems (finalChart ! j) ]
-	  leftCats cat = [ left | Rule _cat (Cat left:_) _ <- topdownRules grammar ? cat ]
-
-
--- type declarations, items & keys
-data Item n c t = Item Int (Rule n c t) [Symbol c t]
-		  deriving (Eq, Ord, Show)
-
-data IKey   c t = Active (Symbol c t) | Passive
-		  deriving (Eq, Ord, Show)
-
-keyof :: Item n c t -> IKey c t
-keyof (Item _ (Rule _ (next:_) _) _) = Active next
-keyof (Item _ (Rule _ [] _) _)       = Passive
-
-forward :: Rule n c t -> Rule n c t 
-forward (Rule cat (_:rest) name) = Rule cat rest name
-
-
-instance (Print n, Print c, Print t) => Print (Item n c t) where
-    prt (Item k (Rule cat rhs name) syms) 
-	= "<" ++show k++ ": "++prt name++". "++
-	  prt cat++" -> "++prt rhs++" / "++prt syms++">"
-
-instance (Print c, Print t) => Print (IKey c t) where
-    prt (Active sym) = "?" ++ prt sym
-    prt (Passive) = "!"
-
-