Data.FiniteMap

Jean-Philippe Bernardy jeanphilippe.bernardy at gmail.com
Mon Sep 4 08:13:43 EDT 2006


I would advise against using a wrapper, because that will probably
change the behaviour of FiniteMap in subtle ways (recall the left-bias
stuff), laying the pavement for future headaches.

Cheers,
JP.

On 9/4/06, Duncan Coutts <duncan.coutts at worc.ox.ac.uk> wrote:
> Is it too late to ask that Data.FiniteMap not die just yet?
>
> There are a number of progs/libs that this affects. It's not that people
> do not want to use the new Data.Map, but people are worried about having
> to drop support for earlier compilers. Data.Map only appeared in 6.4
> iirc. So this forces packages to drop support for 5.04, 6.0 and 6.2.
> Perhaps 5.04 and 6.0 are not so important, but many people still use
> 6.2.2, particularly institutions, which tend to be slow to upgrade.
>
> I think there is a wrapper somewhere that provides the old
> Data.FiniteMap in terms of the Data.Map implementation. Could we use
> something like that in base for at least one more release? By the time
> of 6.8 I think people will be less concerned as 6.2 will be quite old by
> that time.
>
> Duncan
>
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