Johan Tibell wrote:

I think the biggest user will be Haskell code in general,

because you can now use |> instead of ".", so we

should be optimizing for that, not for any particular

library.

I agree with that sentiment.

The main reason I proposed what the lens people

are using is because the lens world is such a

good testing bed for this.

Lens covers quite a large swath of interesting

types, paradigms, and use cases. And of course

a large number of combinators and operators.

There seems to be a good size group of people

hacking on all that and using it in practice.

For something as basic as this, all the little

details matter. All of those details have gotten

some real-world testing, and comparison with

their alternatives. Making it flip ($) instead of

flip (.). The precedence. The fixity. And also

the color of the bikeshed. It turns out that the

difference between a one-character name

and two-character name really is significant

in practice, more than you might realize,

even without factoring in the grand

operator-naming scheme in lens.

Thanks,

Yitz