Writing ICD(s) in Rust

[cheako]

Along with #573 some patterns, useful for Layers, are applicable to device drivers.

• An Iterator over vk::BaseInStructure
• Picking members out of such an iterator.

https://gitlab.com/cheako/vk-layer-cache/-/blob/ff04a089e3335ef1823ec5280781b9be14fcc0f3/src/handlers/types.rs

[MarijnS95]

Assuming with "iterator over vk::BaseInStructure members" you are referring to iterating over pNext chains and casting to the corresponding type based on sType tag, this was implemented in #614.

Other than that Mesa developers are already experimenting with Rust-written Vulkan drivers (https://www.collabora.com/news-and-blog/blog/2023/02/02/exploring-rust-for-vulkan-drivers-part-1/) and I've already given them my full support to cater Ash to that use-case if they wish to use it. Until that happens, which appears to be the most concrete endeavour for Rust-written ICDs, there's nothing actionable here (beyond the Base*Structure matching that was already implemented) and I'll close this issue.