Re: Proposal: Num instance for tuples

Very well, I withdraw my support. I can see the (,) m Applicative version as being useful to people as well. -1 On Thu, Oct 18, 2012 at 5:57 AM, Dan Doel wrote:

On Thu, Oct 18, 2012 at 7:34 AM, Edward Kmett wrote:

...

Unlike the rest of the comments so far, I am

+1

to this proposal.

It has the only reasonable semantics.

There are at least two reasonable choices. The first is this. The second is given by the fact that for any Num a and Applicative f, we can write Num (f a) by lifting all the operations.

I suppose the one proposed here might be more commonly used.

-- Dan