Mercurial > repo
view interps/rhotor/Main.hs @ 3963:aed9d0f65de6
<kmc> printf \'fun fact 0 = 1\\n | fact n = n * fact (n - 1)\\n\' > wisdom/fun\\ fact
author | HackBot |
---|---|
date | Thu, 31 Oct 2013 23:04:42 +0000 |
parents | 859f9b4339e6 |
children |
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module Main () where import System.IO import System.Environment import System.Exit import Misc import Parser import Evaluator main :: IO () main = (hSetBuffering stdout NoBuffering) >> getArgs >>= \args -> if length args /= 1 then usage else readFile (head args) `catch` (\ _ -> putStr "Error: Couldn't open source file.\n" >> exitWith (ExitFailure 1)) >>= \source -> interact (run source) run :: String -> String -> String run source input = nodeTreeToString (evaluate (apply (parse source) (stringToNodeTree input))) usage :: IO () usage = putStr "Usage: rhotorhi sourcecode.rho\n"