[PATCH v9 03/10] rust: num: add `into_bool` method to `Bounded`

Alexandre Courbot
2026-03-14T01:06:42Z

Single-bit numbers are typically treated as booleans. There is an
`Into<bool>` implementation for those, but invoking it from contexts
that lack type expectations is not always convenient.

Add an `into_bool` method as a simpler shortcut.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Reviewed-by: Yury Norov <yury.norov@gmail.com>
Tested-by: Dirk Behme <dirk.behme@de.bosch.com>
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
rust/kernel/num/bounded.rs | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/rust/kernel/num/bounded.rs b/rust/kernel/num/bounded.rs
index 2f5f13ecd3d6..d28d118abd8e 100644
--- a/rust/kernel/num/bounded.rs
+++ b/rust/kernel/num/bounded.rs
@@ -1101,3 +1101,24 @@ fn from(value: bool) -> Self {
unsafe { Self::__new(T::from(value)) }
}
}
+
+impl<T> Bounded<T, 1>
+where
+ T: Integer + Zeroable,
+{
+ /// Converts this [`Bounded`] into a [`bool`].
+ ///
+ /// This is a shorter way of writing `bool::from(self)`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// use kernel::num::Bounded;
+ ///
+ /// assert_eq!(Bounded::<u8, 1>::new::<0>().into_bool(), false);
+ /// assert_eq!(Bounded::<u8, 1>::new::<1>().into_bool(), true);
+ /// ```
+ pub fn into_bool(self) -> bool {
+ self.into()
+ }
+}

--
2.53.0