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Date: Mon, 13 Oct 2025 11:39:35 +0200
Message-Id: <DDH3F3QRN81U.2A00K8U33PSKA@kernel.org>
Cc: "Markus Probst" <markus.probst@posteo.de>, "Danilo Krummrich"
 <dakr@kernel.org>, "Miguel Ojeda" <ojeda@kernel.org>, "Alex Gaynor"
 <alex.gaynor@gmail.com>, "Lee Jones" <lee@kernel.org>, "Pavel Machek"
 <pavel@kernel.org>, "Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
 "Vlastimil Babka" <vbabka@suse.cz>, "Liam R. Howlett"
 <Liam.Howlett@oracle.com>, "Uladzislau Rezki" <urezki@gmail.com>, "Boqun
 Feng" <boqun.feng@gmail.com>, "Gary Guo" <gary@garyguo.net>,
 <bjorn3_gh@protonmail.com>, "Andreas Hindborg" <a.hindborg@kernel.org>,
 "Trevor Gross" <tmgross@umich.edu>, <rust-for-linux@vger.kernel.org>,
 <linux-kernel@vger.kernel.org>, <linux-leds@vger.kernel.org>
Subject: Re: [PATCH v4 1/2] rust: add basic Pin<Vec<T, A>> abstractions
From: "Benno Lossin" <lossin@kernel.org>
To: "Alice Ryhl" <aliceryhl@google.com>
X-Mailer: aerc 0.21.0
References: <20251012145221.172116-1-markus.probst@posteo.de>
 <20251012145221.172116-2-markus.probst@posteo.de>
 <DDGHGF4XOJQG.2MVGBMPK0KUQE@kernel.org>
 <e550b0862e9ea87e50688d1ec8f623638d170a3a.camel@posteo.de>
 <DDGNXV9KS3RS.2WHS4OOYM6DOP@kernel.org>
 <2a31fcd045582382987c8c1da7c4b7d58a1dff61.camel@posteo.de>
 <DDH1DE35H7L0.1Z2R655P701HR@kernel.org> <aOzEz23fWxHZbvdh@google.com>
In-Reply-To: <aOzEz23fWxHZbvdh@google.com>

On Mon Oct 13, 2025 at 11:22 AM CEST, Alice Ryhl wrote:
> On Mon, Oct 13, 2025 at 10:03:19AM +0200, Benno Lossin wrote:
>> And `Vec::pin_init_slice` would have the following signature:
>>=20
>>     fn pin_init_slice<T, I, E>(this: Vec<I>, flags: alloc::Flags) -> Res=
ult<Pin<Box<[T]>>>
>>     where
>>         I: PinInit<T, E>,
>>         Error: From<E>;
>
> We already have Box::pin_slice().

Oh that's perfect :) I still think that the helper vec function above
would be useful, if we want to use this pattern (collecting initializers
in a vec) more broadly.

---
Cheers,
Benno