2008-10-11 Hackage status with GHC 6.10
Don Stewart
dons at galois.com
Sun Oct 12 14:09:18 EDT 2008
duncan.coutts:
> On Sun, 2008-10-12 at 14:56 +0100, Ian Lynagh wrote:
> > On Sun, Oct 12, 2008 at 03:40:53PM +0200, Henning Thielemann wrote:
> > >
> > > ... and erm, how can I enable parsing of optimizer rules?
> > > With {-# OPTIONS_GHC -O #-} ?
> >
> > Yes, although note that Cabal passes -O by default. I'd recommend not
> > putting it in a pragma, as that will break
> > ./Setup configure --disable-optimization
>
> I think the question was how to get the RULES pragmas to be parsed. One
> does have to turn on a language extension to get the forall in rules to
> parse and it's not very clear at the moment which one we should be
> using.
>
> See http://hackage.haskell.org/trac/ghc/ticket/2497
I've been suggesting Rank2Types, which does the trick.
-- Don
More information about the Libraries
mailing list