Re: [Haskell-cafe] First go at reactive programming

Reactive-0.3 seems to have a dependency on TypeCompose-0.3. Earlier version does not work (for lack of Data.Pair). This probably should be specified in Cabal file. I aslo fixed all the LANGUAGE problems and now encountered the following error in TypeCompose: [4 of 9] Compiling Control.Compose ( src/Control/Compose.hs, dist/build/Control/Compose.o ) src/Control/Compose.hs:561:0: parse error on input `deriving' I tried to restored the commented out "deriving Monoid" and got pass that. Not sure if that is right though. Back to reactive-0.3, I encountered: src/Data/Future.hs:60:27: Module `Control.Monad' does not export `forever' Forever is in the latest library, but not in my GHC 6.6. I am not sure how to get this fixed. Any suggestion? http://www.haskell.org/ghc/docs/latest/html/libraries/base/Control-Monad.htm... Steve On Jan 19, 2008 1:31 AM, Conal Elliott wrote:

Hi Steve,

Thanks for letting me know about the LANGUAGE problem. Yes, I used 6.8-friendly (6.6-unfriendly) LANGUAGE pragmas. In retrospect, probably not such a great idea, since there seem to be many folks still on 6.6.

I just changed the sources (commenting out the LANGUAGE pragmas and inserting -fglasgow-exts pragmas), darcs-pushed, and put a new version (0.3) on hackage. Please give it another try.

Cheers, - Conal

On Jan 18, 2008 7:58 PM, Steve Lihn wrote:

...

Tried to install reactive-0.2 on GHC-6.6, but failed.

Building reactive-0.2... src/Data/Reactive.hs:1:13: cannot parse LANGUAGE pragma

Is the package for GHC 6.8? Is there an older version (0.0?) for GHC 6.6 that I can play with your example? (Or advise how to hack that file to get it work on 6.6)

Thanks, Steve