On Thu, Mar 08, 2012 at 12:54:13PM +0200, Roman Cheplyaka wrote: > * Simon Hengel <s...@typeful.net> [2012-03-08 11:48:41+0100] > > On Thu, Mar 08, 2012 at 12:18:56PM +0200, Roman Cheplyaka wrote: > > > If it's fine to depend on FunDeps, you can use ListLike. > > > http://hackage.haskell.org/package/ListLike > > > > How would that help with toText? > > toText = fromListLike > > (ListLike instance for Text is provided by the listlike-instances > package.)
Ah, the listlike-instances package is the missing piece. Not sure if this is going somewhere. But I'm still trying to get a clear picture of the performance implications. Say I have a newtype-wrapped ByteString that I would decode to String/Text using UTF-8: newtype Value = Value ByteString Would it be possible to go from Value to Text by essentially ending up with Data.Text.Encoding.decodeUtf8 at runtime (e.g. by using rewrite rules)? Cheers, Simon _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe