Guarantee that the complex number type is compatible with the C representation

[thestinger]

This would just mean packing the struct representation.

I think it's probably already equivalent on every platform Rust runs on right now though...

[msullivan]

What do you mean by packing the struct representation? Do we have a pack directive?

[Aatch]

@msullivan yes, we do: #[packed]

[thestinger]

Closing in favour of #10500. This is worse than I thought.