rust: alloc: allow coercion from Box<T> to Box<dyn U> if T implements U

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This enables the creation of trait objects backed by a Box, similarly to
what can be done with the standard library.

Suggested-by: Benno Lossin <benno.lossin@proton.me>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Benno Lossin <benno.lossin@proton.me>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Link: https://lore.kernel.org/r/20250412-box_trait_objs-v3-1-f67ced62d520@nvidia.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

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Alexandre Courbot 2025-04-12 15:29:13 +09:00 • committed by Danilo Krummrich

parent c3152988c0

commit 85f8e98dbb

1 changed files with 39 additions and 1 deletions

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rust/kernel/alloc/kbox.rs

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