"Committed_by_peb"

src/GF/Parsing/CFG.hs

@@ -0,0 +1,44 @@
+----------------------------------------------------------------------
+-- |
+-- Maintainer  : PL
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/04/11 13:52:51 $ 
+-- > CVS $Author: peb $
+-- > CVS $Revision: 1.1 $
+--
+-- CFG parsing
+-----------------------------------------------------------------------------
+
+module GF.NewParsing.CFG 
+    (parseCF, module GF.NewParsing.CFG.PInfo) where
+
+import GF.Formalism.Utilities
+import GF.Formalism.CFG
+import GF.NewParsing.CFG.PInfo
+
+import qualified GF.NewParsing.CFG.Incremental as Inc
+import qualified GF.NewParsing.CFG.General     as Gen
+
+----------------------------------------------------------------------
+-- parsing
+
+--parseCF :: (Ord n, Ord c, Ord t) => String -> CFParser c n t 
+parseCF "gb" = Gen.parse bottomup
+parseCF "gt" = Gen.parse topdown
+parseCF "ib" = Inc.parse (bottomup, noFilter)
+parseCF "it" = Inc.parse (topdown, noFilter)
+parseCF "ibFT" = Inc.parse (bottomup, topdown)
+parseCF "ibFB" = Inc.parse (bottomup, bottomup)
+parseCF "ibFTB" = Inc.parse (bottomup, bothFilters)
+parseCF "itF" = Inc.parse (topdown, bottomup)
+-- default parser:
+parseCF _ = parseCF "gb"
+
+bottomup = (True, False)
+topdown = (False, True)
+noFilter = (False, False)
+bothFilters = (True, True)
+
+