Re: [Haskell-cafe] parsec: parserFail & multiple error messages

On 12-08-08 03:24 PM, silly8888 wrote:

The problem is that when I try this

parse integer "" "70000"

I get the following error:

Left (line 1, column 6): unexpected end of input expecting digit integer overflow

ie there are three error messages but I only want the last one. Is there something I can do about this?

import Text.Parsec import Text.Parsec.String integer :: Parser Int integer = try integ3r "number at most 65535" integ3r = do s <- many1 digit let n = read s if n > 65535 then unexpected "number overflow" else return n main = do parseTest integer "a70000" parseTest integer "70000"