data-default WAS: [containers] Proposal: Change to the Data.Map Monoid

Bryan O'Sullivan bos at
Wed May 21 18:39:20 UTC 2014

On Wed, May 21, 2014 at 9:11 AM, Adam Bergmark <adam at> wrote:

> As is, I don't find data-default to be useful, and decided to move away
> from it in fay for a number of reasons: [...]

I agree. Default is the bad kind of trivial: it gives you nothing, but in
exchange takes away type inference and the ability to choose different
defaults for varying circumstances. I wouldn't support adding it to base,
and prefer to avoid packages that use it.
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