"Committed_by_peb"

1 files changed, 0 insertions, 84 deletions

diff --git a/src/GF/Parsing/ParseCFG/General.hs b/src/GF/Parsing/ParseCFG/General.hs
deleted file mode 100644
index 5e37635a5..000000000
--- a/src/GF/Parsing/ParseCFG/General.hs
+++ /dev/null
@@ -1,84 +0,0 @@
-----------------------------------------------------------------------
--- |
--- Module      : ParseCFG.General
--- Maintainer  : Peter Ljunglöf
--- Stability   : (stable)
--- Portability : (portable)
---
--- > CVS $Date: 2005/03/29 11:17:55 $ 
--- > CVS $Author: peb $
--- > CVS $Revision: 1.2 $
---
--- Several implementations of CFG chart parsing
------------------------------------------------------------------------------
-
-module GF.Parsing.ParseCFG.General 
-    (parse, Strategy) where
-
-import GF.System.Tracing
-
-import GF.Parsing.Utilities
-import GF.Parsing.CFGrammar
-import GF.Parsing.GeneralChart 
-import GF.Data.Assoc
-
-parse :: (Ord n, Ord c, Ord t) => Strategy -> CFParser n c t
-parse strategy grammar start = extract . process strategy grammar start
-
-type Strategy = (Bool, Bool) -- (isBottomup, isTopdown)
-
-extract :: [Item n (Symbol c t)] -> [Edge (Rule n c t)]
-extract edges =
-    edges'
-    where edges' = [ Edge j k (Rule cat (reverse found) name) |
-		     Edge j k (Cat cat, found, [], Just name) <- edges ]
-
-process :: (Ord n, Ord c, Ord t) => Strategy -> PInfo n c t -> 
-	   [c] -> Input t -> [Item n (Symbol c t)]
-process (isBottomup, isTopdown) grammar start
-    = trace ("CFParserGeneral" ++ 
-	     (if isBottomup then " BU" else "") ++ 
-	     (if isTopdown  then " TD" else "")) $
-      buildChart keyof [predict, combine] . axioms 
-    where axioms input = initial ++ scan input
-
-          scan input = map (fmap mkEdge) (inputEdges input)
-	  mkEdge tok = (Tok tok, [], [], Nothing)
-
-          -- the combine rule
-          combine chart (Edge j k (next, _, [], _))
-	      = [ edge `forwardTo` k | edge <- chartLookup chart (Active next j) ]
-          combine chart edge@(Edge _ j (_, _, next:_, _))
-	      = [ edge `forwardTo` k | Edge _ k _ <- chartLookup chart (Passive next j) ]
-
-          -- initial predictions
-          initial = [ loopingEdge 0 rule | cat <- start, rule <- tdRuleLookup ? cat ]
-
-          -- predictions
-          predict chart (Edge j k (next, _, [], _)) | isBottomup 
-	      = [ loopingEdge j rule `forwardTo` k | rule <- bottomupRules grammar ? next ]
-	      -- - - - - - - - - -   ^^^^^^^^^^^^^ Kilbury prediction: move dot forward
-	  predict chart (Edge _ k (_, _, Cat cat:_, _))
-	      = [ loopingEdge k rule | rule <- tdRuleLookup ? cat ]
-	  predict _ _ = []
-
-          tdRuleLookup | isTopdown  = topdownRules grammar
-		       | isBottomup = emptyLeftcornerRules grammar
-
--- internal representation of parse items
-
-type Item   n s = Edge (s, [s], [s], Maybe n)
-type IChart n s = Chart (Item n s) (IKey s)
-data IKey     s = Active  s Int
-		| Passive s Int
-		  deriving (Eq, Ord, Show)
-
-keyof (Edge _ j (_, _, next:_, _)) = Active next j
-keyof (Edge j _ (cat, _, [], _))   = Passive cat j
-
-forwardTo (Edge i j (cat, found, next:tofind, name)) k = Edge i k (cat, next:found, tofind, name)
-
-loopingEdge k (Rule cat tofind name) = Edge k k (Cat cat, [], tofind, Just name)
-
-
-