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import System
import Char
-- usage: extract2gf <lang> <extracted>
main = do
la:f:_ <- getArgs
let cnc = f ++ ".gf"
let abs = f ++ "Abs.gf"
s <- readFile f
writeFile abs $ "abstract " ++ f ++ "Abs = Cat ** {\n"
writeFile cnc $ "concrete " ++ f ++ " of " ++ f ++
"Abs = Cat" ++ la ++ " ** open Paradigms" ++ la ++ " in {\n"
mapM_ (mkOne abs cnc . words) $ filter (not . empty) $ lines s
appendFile abs "}"
appendFile cnc "}"
-- format: cat oper args
mkOne abs cnc (cat : oper : args@(a1:_)) = do
appendFile abs $ " fun " ++ fun ++ " : " ++ cat ++ " ;\n"
appendFile cnc $ " lin " ++ fun ++ " = " ++ lin ++ " ;\n"
where
fun = a1 ++ "_" ++ cat ++ "_" ++ oper
lin = unwords $ oper:["\"" ++ s ++ "\"" | s <- args]
mkOne _ _ ws = putStrLn $ unwords ws
empty s = all isSpace s || take 2 s == "--"
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