Re: [Haskell-cafe] Parsec error message not making any sense

Hi Roman, I'm using parsec-3.1.3 I put the code in a gist here - sorry about that. https://gist.github.com/dargosch/5955045 Fredrik On Tue, Jul 9, 2013 at 12:08 AM, Roman Cheplyaka wrote:

Hi Fredrik,

First, do you use the latest parsec version (3.1.3)? If not, can you try the same with 3.1.3?

Second, please upload your code to hpaste.org or a similar service and give us the link. It's not much fun to extract code from an html email.

Roman

* Fredrik Karlsson [2013-07-08 23:54:17+0200]

...

Dear list,

I have a Parsec parser that fails and gives the following error message:

*Main> parseFromFile textgridfile testFile Left

"/Users/frkkan96/Documents/src/ume/umecore/testing/testdata/testdata.TextGrid"

...

(line 35, column 5): unexpected "t" expecting "intervals ["

Now, this is perfectly understandable, but line 35, col 5 in the file being parsed looks like the supplies image - there is no 't' there.

Any ideas on what is going on?

The parser I am using is:

data VariableLine = VariableLine String String deriving Show data TierType = IntervalTier | PointTier deriving Show

data Tier = Tier String deriving Show data LabelFile = LabelFile Double Double deriving Show

data Label = Label String TierType Double Double String deriving Show

haskelldef = makeTokenParser haskellDef

textgridfile :: Parser (LabelFile, [[Label]]) textgridfile = do h <- header ll <- many1 tier return $ (h,ll)

header :: Parser LabelFile header = do string headTS1 start <- try (float haskelldef) <|> (fmap fromInteger $ integer haskelldef ) string "xmax = " end <- try (float haskelldef) <|> (fmap fromInteger $ integer haskelldef ) string "tiers? <exists> \n" string "size = " integer haskelldef string "item []:" whiteSpace haskelldef return $ LabelFile start end

tier :: Parser [Label] tier = do whiteSpace haskelldef string "item [" integer haskelldef string "]:" whiteSpace haskelldef try (string "class = \"IntervalTier\"") <|> string "class = \"TextTier\"" whiteSpace haskelldef string "name = " char '"' name <- many quotedChar char '"' <?> "quote at end of cell" whiteSpace haskelldef string "xmin = " try (float haskelldef) <|> (fmap fromInteger $ integer haskelldef ) whiteSpace haskelldef string "xmax = " try (float haskelldef) <|> (fmap fromInteger $ integer haskelldef ) string "intervals: size = " <|> string "points: size = " integer haskelldef whiteSpace haskelldef labelList <- many1 (interval name) return $ labelList interval :: String -> Parser Label interval tierName = do whiteSpace haskelldef string "intervals [" integer haskelldef string "]:" whiteSpace haskelldef string "xmin = " start <- try (float haskelldef) <|> (fmap fromInteger $ integer haskelldef ) whiteSpace haskelldef string "xmax = " end <- try (float haskelldef) <|> (fmap fromInteger $ integer haskelldef ) whiteSpace haskelldef string "text = " char '"' text <- many quotedChar char '"' <?> "quote at end of cell" return $ Label tierName IntervalTier start end text

which fails on the attached input file.

I can't see how 't' is found?? What am I doing wrong?

/Fredrik

-- "Life is like a trumpet - if you don't put anything into it, you don't get anything out of it."

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