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peb
2005-04-20 11:49:44 +00:00
parent 046161b732
commit fd653e18a2
18 changed files with 768 additions and 633 deletions
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src/GF/Parsing/CFG.hs
+16 -12
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@@ -4,9 +4,9 @@
-- Stability : (stable)
-- Portability : (portable)
--
-- > CVS $Date: 2005/04/14 18:38:36 $
-- > CVS $Date: 2005/04/20 12:49:44 $
-- > CVS $Author: peb $
-- > CVS $Revision: 1.2 $
-- > CVS $Revision: 1.3 $
--
-- CFG parsing
-----------------------------------------------------------------------------
@@ -14,6 +14,8 @@
module GF.NewParsing.CFG
(parseCF, module GF.NewParsing.CFG.PInfo) where
import Operations (Err(..))
import GF.Formalism.Utilities
import GF.Formalism.CFG
import GF.NewParsing.CFG.PInfo
@@ -24,17 +26,19 @@ 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)
parseCF :: (Ord n, Ord c, Ord t) => String -> Err (CFParser c n t)
parseCF "gb" = Ok $ Gen.parse bottomup
parseCF "gt" = Ok $ Gen.parse topdown
parseCF "ib" = Ok $ Inc.parse (bottomup, noFilter)
parseCF "it" = Ok $ Inc.parse (topdown, noFilter)
parseCF "ibFT" = Ok $ Inc.parse (bottomup, topdown)
parseCF "ibFB" = Ok $ Inc.parse (bottomup, bottomup)
parseCF "ibFTB" = Ok $ Inc.parse (bottomup, bothFilters)
parseCF "itF" = Ok $ Inc.parse (topdown, bottomup)
-- default parser:
parseCF _ = parseCF "gb"
parseCF "" = parseCF "gb"
-- error parser:
parseCF prs = Bad $ "Parser not defined: " ++ prs
bottomup = (True, False)
topdown = (False, True)