forked from GitHub/gf-core
76 lines
2.4 KiB
Haskell
76 lines
2.4 KiB
Haskell
----------------------------------------------------------------------
|
|
-- |
|
|
-- Module : PrGSL
|
|
-- Maintainer : BB
|
|
-- Stability : (stable)
|
|
-- Portability : (portable)
|
|
--
|
|
-- > CVS $Date: 2005/11/01 20:09:04 $
|
|
-- > CVS $Author: bringert $
|
|
-- > CVS $Revision: 1.22 $
|
|
--
|
|
-- This module prints a CFG as a Nuance GSL 2.0 grammar.
|
|
--
|
|
-- FIXME: remove \/ warn \/ fail if there are int \/ string literal
|
|
-- categories in the grammar
|
|
-----------------------------------------------------------------------------
|
|
|
|
module GF.Speech.PrGSL (gslPrinter) where
|
|
|
|
import GF.Data.Utilities
|
|
import GF.Speech.SRG
|
|
import GF.Infra.Ident
|
|
|
|
import GF.Formalism.CFG
|
|
import GF.Formalism.Utilities (Symbol(..))
|
|
import GF.Conversion.Types
|
|
import GF.Infra.Print
|
|
import GF.Infra.Option
|
|
import GF.Probabilistic.Probabilistic (Probs)
|
|
|
|
import Data.Char (toUpper,toLower)
|
|
|
|
gslPrinter :: Ident -- ^ Grammar name
|
|
-> Options -> Maybe Probs -> CGrammar -> String
|
|
gslPrinter name opts probs cfg = prGSL srg ""
|
|
where srg = makeSimpleSRG name opts probs cfg
|
|
|
|
prGSL :: SRG -> ShowS
|
|
prGSL (SRG{grammarName=name,startCat=start,origStartCat=origStart,rules=rs})
|
|
= header . mainCat . unlinesS (map prRule rs)
|
|
where
|
|
header = showString ";GSL2.0" . nl
|
|
. comments ["Nuance speech recognition grammar for " ++ name,
|
|
"Generated by GF"] . nl . nl
|
|
mainCat = showString ("; Start category: " ++ origStart) . nl
|
|
. showString ".MAIN " . prCat start . nl . nl
|
|
prRule (SRGRule cat origCat rhs) =
|
|
showString "; " . prtS origCat . nl
|
|
. prCat cat . sp . wrap "[" (unwordsS (map prAlt rhs)) "]" . nl
|
|
-- FIXME: use the probability
|
|
prAlt (SRGAlt mp _ rhs) = wrap "(" (unwordsS (map prSymbol rhs')) ")"
|
|
where rhs' = rmPunct rhs
|
|
prSymbol (Cat c) = prCat c
|
|
prSymbol (Tok t) = wrap "\"" (showString (showToken t)) "\""
|
|
-- GSL requires an upper case letter in category names
|
|
prCat c = showString (firstToUpper c)
|
|
|
|
firstToUpper :: String -> String
|
|
firstToUpper [] = []
|
|
firstToUpper (x:xs) = toUpper x : xs
|
|
|
|
rmPunct :: [Symbol String Token] -> [Symbol String Token]
|
|
rmPunct [] = []
|
|
rmPunct (Tok t:ss) | all isPunct (prt t) = rmPunct ss
|
|
rmPunct (s:ss) = s : rmPunct ss
|
|
|
|
-- Nuance does not like upper case characters in tokens
|
|
showToken :: Token -> String
|
|
showToken t = map toLower (prt t)
|
|
|
|
isPunct :: Char -> Bool
|
|
isPunct c = c `elem` "-_.;.,?!()[]{}"
|
|
|
|
comments :: [String] -> ShowS
|
|
comments = unlinesS . map (showString . ("; " ++))
|