Representation guarantee?

[Rua]

trafficstars

Is there a guarantee that Aligned<A, T> has the same memory representation as T, and is thus sound to transmute to T?

[MabezDev]

My understanding is:

• The alignment struct is repr(C)
• ZSTs are ignored when a struct is repr(C)
• Alignment is ensured via a ZST array.
• The layout should therefore be the same as if it were T itself

I am not the original author of the library, so this might not be correct. In practice, however, this is how it works with current versions of the Rust compiler.