[TwentyPosts]

Afaik specialisation (in full generality) would cause soundness issues, so it's not even just blocked by the trait solver, it's also blocked by figuring out a 'slimmed down' proposal that fixes those.

And that's not even getting into the problem that it's a fairly controversial feature, since people are worried about terrible, hard to track specialisation trees. (See, inheritance.)

[SkiFire13]

> Afaik specialisation (in full generality) would cause soundness issues, so it's not even just blocked by the trait solver, it's also blocked by figuring out a 'slimmed down' proposal that fixes those.

There is already a proposal for how to prevent unsound specializations [0], but it requires a lot of support from the trait solver, hence why I said it's blocked on it.

[0]: https://smallcultfollowing.com/babysteps/blog/2018/02/09/max...