rust: implement static_assert! in a more idiomatic way

[alex]

Signed-off-by: Alex Gaynor [email protected]

[alex]

Hmmm, the doctest code relies on overriding assert! with an assertion that's not usable in const contexts.

I don't see an obvious way to work around this, but it also seems unfortunate to be stuck with this kludgy implementation of static_assert! for forever.

[bjorn3]

Now that assert!() is supported in const contexts that is definitively much clearer!

[bjorn3]

Hmmm, the doctest code relies on overriding assert! with an assertion that's not usable in const contexts.

You could refer to core::panic!() rather than panic!() I think.

[nbdd0121]

core::assert! will generate fully qualified use of panic!, so core::assert! should be sufficient.

[ojeda]

Much better, thanks all!

[nbdd0121]

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