Re: [PATCH v2 0/6] Rework index projection syntax

[Alice Ryhl]

On Tue, Jun 2, 2026 at 4:18 PM Gary Guo <gary@xxxxxxxxxxx> wrote:
>
> This series reworks the index projection syntax in the pointer
> projection infrastructure to use the keyworded syntax to be more explicit.
>
> Doing this allows adding a new panicking variant of index projection,
> just like the normal index operator. This is useful for cases where
> compiler cannot prove (or cannot reliably prove) access is inbounds.
>
> The new syntax looks like this:
> - `[try: index]`: Fallible indexing (replaces `[index]?`).
> - `[build: index]`: Build-time checked indexing (replaces `[index]`).
> - `[panic: index]`: Runtime panicking indexing (newly added).
>
> DMA sample driver and nova core is updated.
>
> Danilo, we previously discussed merging this series with I/O projection for
> patch logistics. However, I'll need more time for next version of I/O
> projection (implementing view types that have original container type
> erased) which won't make it this cycle. This new version for projection
> syntax rework is minor changes only comparde to v1, so I think it's worth
> sending out so it can still land this cycle and get out of the way.

Reviewed-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>