Re: Is there already a list class?

On Jan 10, 2007, at 11:12 AM, Jean-Philippe Bernardy wrote:

On 1/10/07, Spencer Janssen wrote:

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I suggest you have a look a the classes for collections that I've been working on. It's an attempt at unifying all collection types in a single

On Jan 10, 2007, at 3:25 AM, Jean-Philippe Bernardy wrote: framework

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of classes.

darcs repository:

http://darcs.haskell.org/packages/collections

How does this library compare to Edison?

The collections package is intended as an evolution from the collection types in the package rather than a radically different design. In other words, it's easier to move to the collection packages than to edison. Another advantage is that every type is in the same "hierarchy" of classes (no separate class for associative collections). It also makes heavy usage of MTPC+fundeps, I suspect in a way very close to what Robert plans to do for edison. On the other hand, there are more types in the edison library.

Robert: if that is actually the direction where you want to move for edison, I'd suggest to merge the two packages.

Something like this might be feasible for the medium/long-term reorg I have in mind; however, like I said, I'm still trying to work out exactly what I'm aiming for. I have this thought that there should be some principled way to organize these classes based on an underlying mathematical model, but it hasn't quite crystalized in my head yet.

Here's the link to the wiki page: http://haskell.org/haskellwiki/Library/New_collections

Cheers, JP.

Rob Dockins Speak softly and drive a Sherman tank. Laugh hard; it's a long way to the bank. -- TMBG