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+----------------------------------------------------------------------
+-- |
+-- Module : ConvertMCFGtoCFG
+-- Maintainer : PL
+-- Stability : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/04/11 13:52:53 $
+-- > CVS $Author: peb $
+-- > CVS $Revision: 1.1 $
+--
+-- Converting MCFG grammars to (possibly overgenerating) CFG
+-----------------------------------------------------------------------------
+
+
+module GF.OldParsing.ConvertMCFGtoCFG
+ (convertGrammar) where
+
+import GF.System.Tracing
+import GF.Printing.PrintParser
+
+import Monad
+import GF.OldParsing.Utilities
+import qualified GF.OldParsing.MCFGrammar as MCFG
+import qualified GF.OldParsing.CFGrammar as CFG
+import GF.OldParsing.GrammarTypes
+
+convertGrammar :: MCFGrammar -> CFGrammar
+convertGrammar gram = tracePrt "#cf-rules" (prt.length) $
+ concatMap convertRule gram
+
+convertRule :: MCFRule -> [CFRule]
+convertRule (MCFG.Rule cat args record name)
+ = [ CFG.Rule (CFCat cat lbl) rhs (CFName name profile) |
+ MCFG.Lin lbl lin <- record,
+ let rhs = map (mapSymbol convertArg id) lin,
+ let profile = map (argPlaces lin) [0 .. length args-1]
+ ]
+
+convertArg (cat, lbl, _arg) = CFCat cat lbl
+
+argPlaces lin arg = [ place | ((_cat, _lbl, arg'), place) <-
+ zip (filterCats lin) [0::Int ..], arg == arg' ]
+
+filterCats syms = [ cat | Cat cat <- syms ]
+
+
+
+
+
+
+