[Haskell-cafe] Attoparsec: Limiting Parsers to N Bytes, or Combing Parsers?

Twan van Laarhoven twanvl at gmail.com
Mon Sep 26 17:40:26 CEST 2011

On 24/09/11 05:21, Evan Laforge wrote:
> hex2 = (+)<$>  ((*16)<$>  higit)<*>  higit
> higit = subtract (fromEnum '0')<$>  satisfy isHexDigit
> color = Color<$>  hex2<*>  hex2<*>  hex2

How is "subtract (fromEnum '0')" supposed to convert a hex digit to an 
Int or Word8? I think you need digitToInt (or an equivalent function) 
for that.


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