Re: [Haskell-cafe] is there a more concise way to generate helper functions for a datatype built on records?

There is a simplified version of HList style functionality inside HAppS-Data because I found Oleg's repo too hard to understand. -Alex- Stuart Cook wrote:

On 11/25/07, Thomas Hartman wrote:

...

I think I'm running into more or less the same issue discussed at

http://bloggablea.wordpress.com/2007/04/24/haskell-records-considered-grungy...

Just wondering if I missed anything, or if any of the ideas considering better records setter/getters have been implemented in the meantime.

Have a look at [http://code.haskell.org/category], and the associated blog posts

http://twan.home.fmf.nl/blog/haskell/overloading-functional-references.detai... (http://tinyurl.com/2ustba)

and

http://twan.home.fmf.nl/blog/haskell/References-Arrows-and-Categories.detail... (http://tinyurl.com/2v8het)

which discuss "functional references" (similar to Luke's), and include Template Haskell code for deriving more flexible accessors from a record declaration.

Also check out HList [http://homepages.cwi.nl/~ralf/HList/], which can do some interesting things, provided you're willing to abandon the built-in record system.

Stuart _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe