linux-kernel - Re: [PATCH RFC 2/3] rust: Add bindings for device properties

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Message-ID: <CANiq72=db5jQhup8JGZT3_93orrVQt-5pwPvSQb3k5j-eW7rdQ@mail.gmail.com>
Date: Tue, 29 Oct 2024 19:29:54 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Rob Herring <robh@...nel.org>
Cc: Alice Ryhl <aliceryhl@...gle.com>, Saravana Kannan <saravanak@...gle.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>, 
	Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...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@...nel.org>, 
	Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>, Dirk Behme <dirk.behme@...il.com>, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	rust-for-linux@...r.kernel.org
Subject: Re: [PATCH RFC 2/3] rust: Add bindings for device properties

On Tue, Oct 29, 2024 at 6:58 PM Rob Herring <robh@...nel.org> wrote:
>
> I really want a build error if the type is wrong, then the _ case
> would be unreachable. No way to do that?

When you need to work with a set of types, you would normally define a
trait and implement it only for those traits, e.g. see
rust/kernel/transmute.rs. Then it is a build error if you don't
satisfy bounds etc.

Cheers,
Miguel