From 531be3a72e938f2360d312c7fd9cd173e5442594 Mon Sep 17 00:00:00 2001
From: peb <unknown>
Date: Mon, 21 Mar 2005 21:31:43 +0000
Subject: "Committed_by_peb"

---
 src/GF/Parsing/ConvertMCFGtoCFG.hs | 52 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/GF/Parsing/ConvertMCFGtoCFG.hs

(limited to 'src/GF/Parsing/ConvertMCFGtoCFG.hs')

diff --git a/src/GF/Parsing/ConvertMCFGtoCFG.hs b/src/GF/Parsing/ConvertMCFGtoCFG.hs
new file mode 100644
index 000000000..41618ffdd
--- /dev/null
+++ b/src/GF/Parsing/ConvertMCFGtoCFG.hs
@@ -0,0 +1,52 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : ConvertMCFGtoCFG
+-- Maintainer  : PL
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/03/21 22:31:47 $ 
+-- > CVS $Author: peb $
+-- > CVS $Revision: 1.1 $
+--
+-- Converting MCFG grammars to (possibly overgenerating) CFG
+-----------------------------------------------------------------------------
+
+
+module GF.Parsing.ConvertMCFGtoCFG
+    (convertGrammar) where
+
+import Tracing
+import GF.Printing.PrintParser
+
+import Monad
+import GF.Parsing.Utilities
+import qualified GF.Parsing.MCFGrammar as MCFG
+import qualified GF.Parsing.CFGrammar as CFG
+import GF.Parsing.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 ]
+
+
+
+
+
+
+
-- 
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