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SubjectRe: [PATCH v2 2/2] sample: rust: print: Add sampe code for Arc printing
On Tue,  7 Feb 2023 10:52:16 -0800
Boqun Feng <boqun.feng@gmail.com> wrote:

> This both demonstrates the usage of different print format in Rust and
> serves as a selftest for the `Display` and `Debug` implementation of
> `Arc` and its friends.
>
> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
> Reviewed-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
> Reviewed-by: Finn Behrens <fin@nyantec.com>
> Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>

Reviewed-by: Gary Guo <gary@garyguo.net>

> ---
> samples/rust/rust_print.rs | 26 ++++++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
>
> diff --git a/samples/rust/rust_print.rs b/samples/rust/rust_print.rs
> index 8b39d9cef6d1..165a8d7b1c07 100644
> --- a/samples/rust/rust_print.rs
> +++ b/samples/rust/rust_print.rs
> @@ -15,6 +15,30 @@ module! {
>
> struct RustPrint;
>
> +fn arc_print() -> Result {
> + use kernel::sync::*;
> +
> + let a = Arc::try_new(1)?;
> + let b = UniqueArc::try_new("hello, world")?;
> +
> + // Prints the value of data in `a`.
> + pr_info!("{}", a);
> +
> + // Uses ":?" to print debug fmt of `b`.
> + pr_info!("{:?}", b);
> +
> + let a: Arc<&str> = b.into();
> + let c = a.clone();
> +
> + // Uses `dbg` to print, will move `c`.
> + dbg!(c);
> +
> + // Prints debug fmt with pretty-print "#" and number-in-hex "x".
> + pr_info!("{:#x?}", a);
> +
> + Ok(())
> +}
> +
> impl kernel::Module for RustPrint {
> fn init(_module: &'static ThisModule) -> Result<Self> {
> pr_info!("Rust printing macros sample (init)\n");
> @@ -43,6 +67,8 @@ impl kernel::Module for RustPrint {
> pr_cont!(" is {}", "continued");
> pr_cont!(" with {}\n", "args");
>
> + arc_print()?;
> +
> Ok(RustPrint)
> }
> }

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