Commit 21e08aa5 authored Nov 11, 2024 by Guangbo Cui Committed by Miguel Ojeda Dec 18, 2024

rust: alloc: implement Display for Box



Currently `impl Display` is missing for `Box<T, A>`, as a result,
things like using `Box<..>` directly as an operand in `pr_info!()`
are impossible, which is less ergonomic compared to `Box` in Rust
std.

Therefore add `impl Display` for `Box`.

Acked-by: Danilo Krummrich <dakr@kernel.org>
Suggested-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://github.com/Rust-for-Linux/linux/issues/1126


Signed-off-by: Guangbo Cui <2407018371@qq.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/tencent_2AD25C6A6898D3A598CBA54BB6AF59BB900A@qq.com


[ Reworded title. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

parent 2dde1c8b

rust/kernel/alloc/kbox.rs

+10 −0

Original line number	Diff line number	Diff line
		@@ -427,6 +427,16 @@ fn deref_mut(&mut self) -> &mut T {
		}
		}

		impl<T, A> fmt::Display for Box<T, A>
		where
		T: ?Sized + fmt::Display,
		A: Allocator,
		{
		fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
		<T as fmt::Display>::fmt(&**self, f)
		}
		}

		impl<T, A> fmt::Debug for Box<T, A>
		where
		T: ?Sized + fmt::Debug,