linux-kernel - Re: [PATCH 3/6] rust: add `bitfield!` macro

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Message-ID: <CANiq72kj_+uG-63-kd4eAJ2M-3GONHBy2s+fSUaz+aA8Pct-RQ@mail.gmail.com>
Date: Thu, 29 Jan 2026 16:12:54 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Alexandre Courbot <acourbot@...dia.com>
Cc: Yury Norov <ynorov@...dia.com>, Joel Fernandes <joelagnelf@...dia.com>, 
	Miguel Ojeda <ojeda@...nel.org>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>, Yury Norov <yury.norov@...il.com>, 
	John Hubbard <jhubbard@...dia.com>, Alistair Popple <apopple@...dia.com>, Timur Tabi <ttabi@...dia.com>, 
	Edwin Peer <epeer@...dia.com>, Eliot Courtney <ecourtney@...dia.com>, 
	Daniel Almeida <daniel.almeida@...labora.com>, Dirk Behme <dirk.behme@...bosch.com>, 
	Steven Price <steven.price@....com>, rust-for-linux@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] rust: add `bitfield!` macro

On Thu, Jan 29, 2026 at 2:41 PM Alexandre Courbot <acourbot@...dia.com> wrote:
>
> But not doable unfortunately, since macros cannot be declared as
> methods.

Indeed -- it may be doable in the future with postfix macros if they land:

  https://github.com/rust-lang/rfcs/pull/2442

(The proposed ones do not do type-based dispatch).

Cheers,
Miguel