[Haskell-cafe] Re: OOHaskell problems

2006-10-07 Thread Jason Dagit
On 10/3/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I wanted to try using OOHaskell as a library, but I've run into some problems I don't understand. I downloaded the copy from: http://homepages.cwi.nl/~ralf/OOHaskell/ both HList and OOHaskell are now available via DARCS

[Haskell-cafe] Trying to understand HList / hMapOut

2006-10-07 Thread oleg
I am using a heterogenous list as in [1] all elements of which are of a given class C. Since foo maps all class members to Int, hMapOut should be a straight-forward way to produce homogenous Int lists from heterogenous CLists: test :: (CList l) = l - [Int] test = hMapOut foo Well, `foo'

[Haskell-cafe] Re: Trying to understand HList / hMapOut

2006-10-07 Thread Matthias Fischmann
thanks, to both of you! data Fooable is the solution, and also very neat. it took me a moment to learn the useful fact that a little explicit type information can be worse than none, in particular with incomplete contexts. but in the end it worked both without type signatures and with the

[Haskell-cafe] hsffig output produces errors from hsc2hs

2006-10-07 Thread Soenke Hahn
Hi! I want to interface to JACK (http://jackaudio.org/) from a haskell programm and i tried to process jack/jack.h (the JACK API) with hsffig and its output with hsc2hs. I get several error messages from hsc2hs like this: JACK.hsc:198: error: syntax error before ‘}’ token JACK.hsc:198: error: