Can enum::count() be a const function?

[ArekPiekarz]

When EnumCount was introduced, there was a comment that the count() function could be const once the required feature get stabilized in Rust. It seems to me it is possible now, but I'm not a Rust expert yet, so I could be wrong. What is your opinion of this?

As a side effect, this could get rid of the X _COUNT constants polluting the public namespace, but I don't know if you'd want to remove them due to backwards compatibility. However, according to semver, version 0.x.y does not provide any guarantees, so the users should not have any assumptions anyway.

[xoac]

I think in Rust 1.35 is still impossible

https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=f57dce05c0bf5b244fb2f370ac810072

rustc --explain E0379 say

Trait methods cannot be declared const by design. For more information, see
RFC 911.

[ArekPiekarz]

Thanks, I hope it gets implemented one day.