linux-kernel - Re: [PATCH] rust: kernel: str: Implement Debug for CString

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Date:   Fri, 14 Jul 2023 13:05:25 +0300
From:   Ariel Miculas <ariel.miculas@...il.com>
To:     Asahi Lina <lina@...hilina.net>
Cc:     Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...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>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        asahi@...ts.linux.dev
Subject: Re: [PATCH] rust: kernel: str: Implement Debug for CString

On Fri, Jul 14, 2023 at 12:39 PM Asahi Lina <lina@...hilina.net> wrote:
>
> Trivial implementation.
>
> Signed-off-by: Asahi Lina <lina@...hilina.net>
> ---
>  rust/kernel/str.rs | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs
> index c9dd3bf59e34..a94e396d39e1 100644
> --- a/rust/kernel/str.rs
> +++ b/rust/kernel/str.rs
> @@ -606,6 +606,12 @@ fn try_from(cstr: &'a CStr) -> Result<CString, AllocError> {
>      }
>  }
>
> +impl fmt::Debug for CString {
> +    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
> +        fmt::Debug::fmt(&**self, f)
> +    }
> +}
> +
>  /// A convenience alias for [`core::format_args`].
>  #[macro_export]
>  macro_rules! fmt {
>
> ---
> base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5
> change-id: 20230714-cstring-debug-ca021fe0ad78
>
> Thank you,
> ~~ Lina
>

Glad I wasn't the only one missing this, now I don't have to write the
awkard `&*` anymore, as in:
```
pr_debug!("trying to open {:?}\n", &*filename);
```

Cheers,
Ariel