Restoring old functionality

1 files changed, 50 insertions, 0 deletions

diff --git a/src/GF/CF/CFtoGrammar.hs b/src/GF/CF/CFtoGrammar.hs
new file mode 100644
index 000000000..440c4f7c3
--- /dev/null
+++ b/src/GF/CF/CFtoGrammar.hs
@@ -0,0 +1,50 @@
+module CFtoGrammar where
+
+import Ident
+import Grammar
+import qualified AbsGF as A
+import qualified GrammarToSource as S
+import Macros
+
+import CF
+import CFIdent
+import PPrCF
+
+import Operations
+
+import List (nub)
+import Char (isSpace)
+
+-- 26/1/2000 -- 18/4 -- 24/3/2004
+
+cf2grammar :: CF -> [A.TopDef]
+cf2grammar cf = concatMap S.trAnyDef (abs ++ conc) where
+  rules = rulesOfCF cf
+  abs   = cats ++ funs
+  conc  = lintypes ++ lins
+  cats  = [(cat, AbsCat (yes []) (yes [])) | 
+             cat <- nub (concat (map cf2cat rules))] ----notPredef cat
+  lintypes = [] ----[(cat, CncCat (yes) nope Nothing) | (cat,AbsCat _ _) <- cats]
+  (funs,lins) = unzip (map cf2rule rules)
+
+cf2cat :: CFRule -> [Ident]
+cf2cat (_,(cat, items)) = map cfCat2Ident $ cat : [c | CFNonterm c <- items]
+
+cf2rule :: CFRule -> ((Ident,Info),(Ident,Info))
+cf2rule (fun, (cat, items)) = (def,ldef) where
+ f     = cfFun2Ident fun
+ def   = (f, AbsFun (yes (mkProd (args', Cn (cfCat2Ident cat), []))) nope)
+ args0 = zip (map (mkIdent "x") [0..]) items
+ args  = [(v, Cn (cfCat2Ident c)) | (v, CFNonterm c) <- args0]
+ args' = [(zIdent "_", Cn (cfCat2Ident c)) | (_, CFNonterm c) <- args0]
+ ldef  = (f, CncFun 
+               Nothing 
+               (yes (mkAbs (map fst args) 
+                      (mkRecord linLabel [foldconcat (map mkIt args0)])))
+               nope)
+ mkIt (v, CFNonterm _) = P (Vr v) (linLabel 0)
+ mkIt (_, CFTerm (RegAlts [a])) = K a
+ mkIt _ = K "" --- regexp not recognized in input CF ; use EBNF for this
+ foldconcat [] = K ""
+ foldconcat tt = foldr1 C tt
+