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|
module Brainfuck.Parser (
parseBrainfuck
) where
import Control.Applicative( some )
import Text.ParserCombinators.Parsec
type BrainfuckProgram = [BrainCom]
data BrainCom = R | L | Inc | Dec | Out | In | OpenLoop | CloseLoop
deriving (Show, Eq)
parseBrainfuck :: String -> Either ParseError BrainfuckProgram
parseBrainfuck = parse brainfuck "error"
brainfuck = many commentChar >> many fuck
fuck = do
f <- brainCommand
many commentChar
return f
brainCommand = try (char '>' >> return R)
<|> try (char '<' >> return L)
<|> try (char '+' >> return Inc)
<|> try (char '-' >> return Dec)
<|> try (char '.' >> return Out)
<|> try (char ',' >> return In)
<|> try (char '[' >> return OpenLoop)
<|> try (char ']' >> return CloseLoop)
<?> "brainfuck command"
commentChar = noneOf "><+-.,[]"
|
