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-rw-r--r--Brainfuck/Parser.hs46
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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 "><+-.,[]"
+