22 Mar
2016
22 Mar
'16
5:21 a.m.
On Wed, 24 Feb 2016, Manuel Gómez wrote:
To avoid this unhelpful outcome, if the community decided to forbid these instances, some language extension would have to be designed to forbid instance definitions. This has been discussed previously.
It's possible to achieve this without language extensions.
If the community did this, it would break a lot of code that does use these instances, and there would be no workaround,
The backwards-compatible work-around would be simple: Don't use fmap, but mapThd3 and friends. It would be a good opportunity to cleanup code.