On Mon, Mar 19, 2012 at 8:45 AM, Thomas Schilling <nomin...@googlemail.com> wrote: > Regarding the type class for converting to and from that type, there > is a perhaps more complicated question: The current fromString method > uses String as the source type which causes unnecessary overhead. This > is unfortunate since GHC's built-in mechanism actually uses > unpackCString[Utf8]# which constructs the inefficient String > representation from a compact memory representation. I think it would > be best if the new fromString/fromText class allowed an efficient > mechanism like that. unpackCString# has type Addr# -> [Char] which is > obviously GHC-specific.
I've been thinking about this question as well. How about class IsString s where unpackCString :: Ptr Word8 -> CSize -> s It's morally equivalent of unpackCString#, but uses standard Haskell types. -- Johan _______________________________________________ Haskell-prime mailing list Haskell-prime@haskell.org http://www.haskell.org/mailman/listinfo/haskell-prime