diff --git a/src/runtime/haskell-bind/examples/pgf-hsbind-trans.hs b/src/runtime/haskell-bind/examples/pgf-hsbind-trans.hs new file mode 100644 index 000000000..d04a96e08 --- /dev/null +++ b/src/runtime/haskell-bind/examples/pgf-hsbind-trans.hs @@ -0,0 +1,55 @@ +-- | pgf-hsbind-trans: A simple batch translator to illustrate the use of the Haskell binding +-- to the C implementation of the PGF run-time system. +-- +-- AR April 2015 modified from pgf-shell + +import PGF2 +import PGF.Lexing (lexText') + +import Data.Char(isSpace,toLower) +import System.Environment +import qualified Data.Map as Map + +maxNumTrees :: Int +maxNumTrees = 1 + +maxNumVariants :: Int +maxNumVariants = 1 + +main = getPGF =<< getArgs + +getPGF args = case args of + [path,from,to,cat,mxt,mxv] -> pgfTrans from to (Just cat) (read mxt, read mxv) =<< readPGF path + [path,from,to] -> pgfTrans from to Nothing (maxNumTrees,maxNumVariants) =<< readPGF path + _ -> putStrLn "Usage: pgf-hsbind-trans [ <#trees> <#variants>]" + +pgfTrans from to mcat mx pgf = do + cfrom <- getConcr' pgf from + cto <- getConcr' pgf to + let cat = maybe (startCat pgf) id mcat + interact (unlines . map (translates pgf cfrom cto cat mx) . lines) + +getConcr' pgf lang = + maybe (fail $ "Concrete syntax not found: "++show lang) return $ + Map.lookup lang (languages pgf) + +linearizeAndShow gr mxv (t,p) = [show t]++take mxv (linearizeAll gr t)++[show p] + +translates pgf cfrom cto cat (mxt,mxv) s0 = + let s = lextext cfrom s0 + in + case cparse pgf cfrom cat s of + Left tok -> unlines [s,"Parse error: "++tok] + Right ts -> unlines $ take mxt $ map (unlines . linearizeAndShow cto mxv) ts + +cparse pgf concr cat input = parseWithHeuristics concr cat input (-1) callbacks where + callbacks = maybe [] cb $ lookup "App" literalCallbacks + cb fs = [(cat,f pgf ("TranslateEng",concr))|(cat,f)<-fs] + +lextext cnc = unwords . lexText' (\w -> case lookupMorpho cnc w of + _:_ -> w + _ -> case lookupMorpho cnc (uncapitInit w) of + [] -> w + _ -> uncapitInit w + ) + where uncapitInit (c:cs) = toLower c : cs