linux-kernel - Re: [PATCH 5/5] rust: error: Add from_kernel

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Date:   Mon, 27 Feb 2023 13:10:39 +0100
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Boqun Feng <boqun.feng@...il.com>
Cc:     Gary Guo <gary@...yguo.net>, Asahi Lina <lina@...hilina.net>,
        Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Sven Van Asbroeck <thesven73@...il.com>,
        Fox Chen <foxhlchen@...il.com>, rust-for-linux@...r.kernel.org,
        linux-kernel@...r.kernel.org, asahi@...ts.linux.dev
Subject: Re: [PATCH 5/5] rust: error: Add from_kernel_result!() macro

On Sun, Feb 26, 2023 at 11:13 PM Boqun Feng <boqun.feng@...il.com> wrote:
>
> Interesting, sounds like a missing feature in `rustfmt` or maybe we
> don't use the correct config ;-)

It may be coming [1] (I haven't tested if that one would work for us),
but in general it is hard for `rustfmt` because the contents are not
necessarily valid Rust code.

[1] https://github.com/rust-lang/rustfmt/pull/5538

> "Yeah" means they have different behaviors, right? ;-)

Yes, sorry for the confusion :)

> Thanks for finding an example! Means we did use return.
>
> For this particular API, I'd say function right now, `try` blocks if
> avaiable.

Do you mean going with the closure for the time being and `try` blocks
when they become stable? Yeah, I think that is a fair approach.

Cheers,
Miguel