error vs Maybe in Collections package

[Jean-Philippe Bernardy]

Good idea. I added a ticket.

http://cvs.haskell.org/trac/ghc/ticket/792

If there is no taker I'll try to do it this weekend.

Cheers,
JP.

On 6/6/06, Robert Dockins <robdockins at fastmail.fm> wrote:
>
> On Jun 6, 2006, at 9:57 AM, David F. Place wrote:
>
> > It bothers me that the functions findMin, findMax, deleteFindMin
> > and deleteFindMax are error when applied to the empty set in
> > various types of collections.   Shouldn't they return Maybe?
>
>
> FYI, Edison has operations that generalize 'deleteFind*' (named
> viewMin/viewMax) which call 'fail' in an arbitrary monad when applied
> to an empty collection; obviously, these can be instantiated at type
> 'Maybe'.
>
> http://www.eecs.tufts.edu/~rdocki01/docs/edison/Data-Edison-
> Coll.html#v%3AminView
>
>
> > --------------------------------
> > David F. Place
> > mailto:d at vidplace.com
>
>
> Rob Dockins
>
> Speak softly and drive a Sherman tank.
> Laugh hard; it's a long way to the bank.
>            -- TMBG
>
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