On Tue, Jun 7, 2011 at 5:33 PM, Mark Wotton <mwotton@gmail.com> wrote:

On Wed, Jun 8, 2011 at 10:15 AM, David Pollak <feeder.of.the.bears@gmail.com> wrote:

On Tue, Jun 7, 2011 at 5:05 PM, Stephen Blackheath [to GHC-iPhone] <likeliest.complexions.stephen@blacksapphire.com> wrote:

David,

That is great, and, especially, welcome to Haskell! As I said, I am working on a new version of GHC for iPhone. There probably isn't much sense in involving you in that at this point. I'll get you to test for me when I have something working.

I can't think of anything obvious for you to do now, but I'll keep it in the back of my mind. Haskell bindings to iPhone infrastructure are lacking, so maybe you could look at that.

Cool.

I'm currently working on taking http://en.wikibooks.org/wiki/Write_Yourself_a_Scheme_in_48_Hours and making it an iPad app. ;-) Hopefully I'll be done tomorrow and be able to share it.

I'm noodling with how to generically express Obj-C method invocations in Haskell in a way that would allow for automatic binding/ffi generation via Obj-C header files. I'm not sure it's possible, but it'd certainly reduce the amount of boilerplate (it's also been a long time since I've done low level Obj-C dispatch snooping... I wonder what's changed. ;-) )

I'm also thinking about how to use Haskell's GC to do automatic retain/release calls...

Anyway... more as I make progress.

I think it's bitrotted a bit, but http://code.google.com/p/hoc/ was a bridge that worked at one time with haskell and obj-c. might be worth mining for ideas, at least.

Coolness. I started looking at the code this morning. Lemme see what I can do to get it ported to run under GHC 7 and output stuff that's compatible with ghc-iphone.

What model are you thinking of?

Ideally, I'd like to do as much coding in Haskell as possible. Even when I wrote Mesa (http://www.plsys.co.uk/mesa.htm ) back in the day, I used as much C++ (of the then-available Objective-C++) as I could for type safety and performance. I used the Objective-C stuff for UI and for external APIs (to avoid the C++ fragility). Going back to Obj-C and seeing how it has not progressed materially since 1994 when I last spent time with it makes me want to use it even less (wow... this is turning into a full-blown rant against Obj-C... sorry for offending the Obj-C lovers in the audience.) So, my goal is to have as much of my code as possible in Haskell with very thin layers for bridging to IB.

Importing haskell code into an obj-c project, or running everything from haskell? If it's the first, my Hubris project may be interesting (http://github.com/mwotton/hubris) - has a bit of code for automatically testing whether haskell expressions are exportable to ruby.

cheers
mark

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