Hi
Derive generates declarations - they can be instances, classes, data
types, functions, type synonyms etc.
Thanks, Neil
On Mon, Mar 1, 2010 at 10:32 AM, John Lato
From: Christian H?ner zu Siederdissen
Hi,
I am thinking about how to easily generate instances for a class. Each instance is a tuple with 1 or more elements. In addition there is a second tuple with the same number of elements but different type. This means getting longer and longer chains of something like (...,x3*x2,x2,0).
- template haskell? - CPP and macros?
Consider arrays with fast access like Data.Vector, but with higher dimensionality. Basically, I want (!) to fuse when used in Data.Vector code.
(shameless plug) You may want to look at my AdaptiveTuple package, which does something very similar to this. I used Template Haskell because AFAIK neither generic approaches nor DrIFT/Derive will generate data decls.
If all you need are the instances, then DrIFT or Derive would be my recommendations.
Cheers, John _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users