linux-kernel - Re: [RFC PATCH 1/2] rust: LED abstraction

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Message-ID: <CANiq72=sGDU2JbyL6sKTJzmuLF8J-hud0WXLctkycwOV0h8VFg@mail.gmail.com>
Date: Mon, 18 Nov 2024 17:39:04 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: Marek Behún <kabel@...nel.org>, 
	Fiona Behrens <me@...enk.dev>, Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>, 
	linux-leds@...r.kernel.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>, FUJITA Tomonori <fujita.tomonori@...il.com>, 
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org
Subject: Re: [RFC PATCH 1/2] rust: LED abstraction

On Mon, Nov 18, 2024 at 11:19 AM Alice Ryhl <aliceryhl@...gle.com> wrote:
>
> signature. When you write `impl<T>`, then this means that it is a
> template (we use the word "generic" in Rust rather than "template"),

Marek: a main difference is that generics in Rust require you to spell
out everything your type needs in order to be able to use it in the
implementation, unlike C++ templates which will gladly accept any type
as long as the resulting code compiles (i.e. whether the types make
sense or not).

So in C++ you may typically do just `T`, while in Rust you typically
restrict your types with bounds and `where`s clauses like Alice shows.

I hope that clarifies a bit!

Cheers,
Miguel