Added old GF.Speech.PrRegExp back in

src-3.0/GF/Speech/PrRegExp.hs

@@ -0,0 +1,33 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : PrSLF
+-- Maintainer  : BB
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- This module prints a grammar as a regular expression.
+-----------------------------------------------------------------------------
+
+module GF.Speech.PrRegExp (regexpPrinter,multiRegexpPrinter) where
+
+import GF.Conversion.Types
+import GF.Formalism.Utilities
+import GF.Infra.Ident
+import GF.Infra.Option (Options)
+import GF.Speech.CFGToFiniteState
+import GF.Speech.RegExp
+import GF.Compile.ShellState (StateGrammar)
+
+
+regexpPrinter :: Options -> StateGrammar -> String
+regexpPrinter opts s = (++"\n") $ prRE $ dfa2re $ cfgToFA opts s
+
+multiRegexpPrinter :: Options -> StateGrammar -> String
+multiRegexpPrinter opts s = prREs $ mfa2res $ cfgToMFA opts s
+
+prREs :: [(String,RE (MFALabel String))] -> String
+prREs res = unlines [l ++ " = " ++ prRE (mapRE showLabel re) | (l,re) <- res]
+  where showLabel = symbol (\l -> "<" ++ l ++ ">") id
+
+mfa2res :: MFA String -> [(String,RE (MFALabel String))]
+mfa2res (MFA _ dfas) = [(l, minimizeRE (dfa2re dfa)) | (l,dfa) <- dfas]