Bifunctor whence Swapped instances for Either and Pair

Question

Taneb opened this issue 11 years ago · comments

It'd mean adding another dependency, but bifunctors is already a dependency of lens, so that isn't too much of a problem.

Other instances from lens that could be added include Each, Field1, and Field2 for Pair. Some prisms for Either and Maybe could be cool, too.

Simon Meier · Answer 1 · Fri May 10 2013 16:35:12 GMT+0800 (China Standard Time)

That sounds good. Would have time to prepare a patch are shall I do it?

Nathan van Doorn · Answer 2 · Fri May 10 2013 21:50:59 GMT+0800 (China Standard Time)

I'll get on it now.

Simon Meier · Answer 3 · Sat May 11 2013 22:12:32 GMT+0800 (China Standard Time)

Thanks for the patch. I've thrown in the Foldable and Traversable instances for either and released it to Hackage as strict-base-types-0.2.