Re: [PATCH v17 1/3] rust: types: add `ForeignOwnable::PointedTo`

[Danilo Krummrich]

On Tue, Feb 18, 2025 at 09:37:43AM -0500, Tamir Duberstein wrote:
> Allow implementors to specify the foreign pointer type; this exposes
> information about the pointed-to type such as its alignment.
> 
> This requires the trait to be `unsafe` since it is now possible for
> implementors to break soundness by returning a misaligned pointer.
> 
> Encoding the pointer type in the trait (and avoiding pointer casts)
> allows the compiler to check that implementors return the correct
> pointer type. This is preferable to directly encoding the alignment in
> the trait using a constant as the compiler would be unable to check it.
> 
> Signed-off-by: Tamir Duberstein <tamird@xxxxxxxxx>

Acked-by: Danilo Krummrich <dakr@xxxxxxxxxx>