77 lines
1.8 KiB
Haskell
77 lines
1.8 KiB
Haskell
-- | Driver for the compiler.
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module Main where
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import List
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import System
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import System.Console.GetOpt
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import System.IO
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import PrettyShow
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import Parse
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import Unnest
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import GenerateC
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data Flag = ParseOnly | Verbose
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deriving (Eq, Show)
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options :: [OptDescr Flag]
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options =
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[ Option [] ["parse-only"] (NoArg ParseOnly) "only parse input file"
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, Option ['v'] ["verbose"] (NoArg Verbose) "show more detail about what's going on"
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]
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getOpts :: [String] -> IO ([Flag], [String])
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getOpts argv =
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case getOpt RequireOrder options argv of
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(o,n,[] ) -> return (o,n)
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(_,_,errs) -> error (concat errs ++ usageInfo header options)
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where header = "Usage: fco [OPTION...] SOURCEFILE"
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numberedListing :: String -> String
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numberedListing s = concat $ intersperse "\n" $ [(show n) ++ ": " ++ s | (n, s) <- zip [1..] (lines s)]
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main :: IO ()
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main = do
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argv <- getArgs
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(opts, args) <- getOpts argv
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let fn = case args of
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[fn] -> fn
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_ -> error "Must specify a single input file"
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let progress = if Verbose `elem` opts then hPutStrLn stderr else (\s -> return ())
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progress $ "Options: " ++ (show opts)
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progress $ "Compiling " ++ fn
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progress ""
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progress "{{{ Preprocessor"
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preprocessed <- readSource fn
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progress $ numberedListing preprocessed
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progress "}}}"
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progress "{{{ Parser"
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(ast, state) <- parseSource preprocessed fn
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progress $ pshow ast
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progress "}}}"
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progress "{{{ State after parsing"
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progress $ pshow state
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progress "}}}"
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progress "{{{ Unnest"
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(state, ast) <- unnest state ast
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progress $ pshow ast
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progress $ pshow state
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progress "}}}"
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if ParseOnly `elem` opts then do
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putStrLn $ show ast
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else do
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progress "{{{ Generate C"
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c <- generateC state ast
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putStr c
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progress "}}}"
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progress "Done"
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