Camel case warning fires on `X86_64`

[nagisa]

I feel like the warning fires wrongly on this variant name in particular.

src/lib.rs:24:5: 24:11 warning: variant `X86_64` should have a camel case name such as `X8664`, #[warn(non_camel_case_types)] on by default
src/lib.rs:24     X86_64,
                  ^~~~~~

[Thiez]

It looks like the warning fires whenever the name contains a _ that is not leading or trailing. Would it be reasonable to make an exception for _ if the characters directly before and after are digits?

[nagisa]

Adding an exception for digits only will lead to to an issue later about some other non-letter case. What should be done instead, IMO, is check that the character before and after _ are letters and only warn then.

/me shrugs. Very bikeshedy thing to discuss.

[brson]

I understand wanting this to just work, but it's getting uncomfortably clever. Requiring a suppression here isn't so bad.

Is this a case that comes up other than for "X86_64"?