Re: [Haskell-cafe] ByteString in patterns

10 Mar 2009

      Don Stewart ha scritto:
...
[...]
    {-# LANGUAGE OverloadedStrings #-}
import qualified Data.ByteString.Char8 as C
isMatch :: C.ByteString -> Bool
    isMatch "match" = True
    isMatch _       = False
main = print . map isMatch . C.lines =<< C.getContents
What is the reason why instance declarations for IsString class are not 
defined for available ByteStrings?

I need to define it by myself.

Thanks  Manlio Perillo