linux-kernel - Re: [PATCH 03/19] rust: types: avoid repetition in `{As,From}Bytes` impls

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Message-ID: <CAH5fLghNLZWjaABcztD8utC9VbPMUYGNYKjisPdV=vVYVF+H+w@mail.gmail.com>
Date: Thu, 5 Sep 2024 09:58:48 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: Miguel Ojeda <ojeda@...nel.org>
Cc: Alex Gaynor <alex.gaynor@...il.com>, Wedson Almeida Filho <wedsonaf@...il.com>, 
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, 
	Trevor Gross <tmgross@...ch.edu>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org, patches@...ts.linux.dev
Subject: Re: [PATCH 03/19] rust: types: avoid repetition in `{As,From}Bytes` impls

On Wed, Sep 4, 2024 at 10:44 PM Miguel Ojeda <ojeda@...nel.org> wrote:
>
> In order to provide `// SAFETY` comments for every `unsafe impl`, we would
> need to repeat them, which is not very useful and would be harder to read.
>
> We could perhaps allow the lint (ideally within a small module), but we
> can take the chance to avoid the repetition of the `impl`s themselves
> too by using a small local macro, like in other places where we have
> had to do this sort of thing.
>
> Thus add the straightforward `impl_{from,as}bytes!` macros and use them
> to implement `FromBytes`.
>
> This, in turn, will allow us in the next patch to place a `// SAFETY`
> comment that defers to the actual invocation of the macro.
>
> Signed-off-by: Miguel Ojeda <ojeda@...nel.org>

Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>