mirror of
https://github.com/GrammaticalFramework/gf-core.git
synced 2026-04-09 04:59:31 -06:00
42 lines
944 B
Haskell
42 lines
944 B
Haskell
module Main where
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import GF.Embed.EmbedAPI
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import GSyntax
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main :: IO ()
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main = do
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gr <- file2grammar "math.gfcm"
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loop (translate answerTree gr)
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loop :: (String -> String) -> IO ()
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loop trans = do
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s <- getLine
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if s == "quit" then putStrLn "bye" else do
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putStrLn $ trans s
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loop trans
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translate :: (Tree -> Tree) -> MultiGrammar -> String -> String
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translate tr gr = unlines . map transLine . lines where
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transLine s = case parseAllLang gr (startCat gr) s of
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(lg,t:_):_ -> linearize gr lg (tr t)
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_ -> "NO PARSE"
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answerTree :: Tree -> Tree
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answerTree = gf . answer . fg
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answer :: GQuestion -> GAnswer
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answer p = case p of
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GOdd x -> test odd x
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GEven x -> test even x
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GPrime x -> test prime x
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value :: GObject -> Int
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value e = case e of
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GNumber (GInt i) -> fromInteger i
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test :: (Int -> Bool) -> GObject -> GAnswer
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test f x = if f (value x) then GYes else GNo
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prime :: Int -> Bool
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prime = (< 8) ----
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