On Sun, Feb 1, 2015 at 4:35 AM, Bardur Arantsson
However, I certainly agree with Gershom B that the "enterprise" people are exactly the kind of people who have the means to prevent these problems affecting *them* too much. They probably should be (or are already) doing due dilligence to that effect.
I was actually going to use the same argument but in the opposite way! In all my larger projects I wind up with a project-specific mini-Prelude. So I'm pretty much isolated from Prelude changes. Therefore, I don't mind if the Prelude never changes again. So I'd prefer to err on the side that makes life easier for library maintainers. Of course it also means I don't mind the changes very much. They just don't seem like such an obvious improvement either. I've actually backed away from generalizations before due to the poorer type inference and error messages that came out of surprising places, as well as lack of sufficient usefulness. The main disconnect for me is that I occasionally use Foldable and Traversable. But I use a lot more lists, and I actually kind of like the less general functions. When I need the general ones, I know where they are, and I don't mind importing. I have a tool that adds qualified imports automatically, but I import Foldable and Traversable orders of magnitude less frequently than, say, Data.Map. I don't mind qualified imports. I know some people find them ugly, but when someone says "ugly" about an aesthetic thing (i.e. names, layout, etc.) I translate that to "I'm not used to it." This is from personal experience where I found certain things ugly (e.g. camelCase), but when I got used to them they look just fine. I went and read through part of the original BPP thread, and the principles in support seem reasonable. The only doc I can find for BBP is https://wiki.haskell.org/Foldable_Traversable_In_Prelude, and it doesn't have a "motivation" section. It would be interesting to see some specific examples about how the current situation is very painful, and how the generalization would make it better. Like I said, I'm not really against it, but maybe I can learn something from those who support it so passionately.