[Haskell-cafe] Arrows for invertible programming: Notation question

[Ralf Hinze]

> Is this something that can be compiled with GHC right now? I noticed - 
> fgenerics but I think it does something else entirely.

GH is a pre-compiler that takes GH code to Haskell code,
so this is a two-step process. -fgenerics turns derivable
type classes on (see "Derivable type classes", Ralf Hinze
and Simon Peyton Jones, Haskell Workshop 2000, pp94-105).
The two are different but related ...

Cheers, Ralf