diff options
Diffstat (limited to 'rust/pin-init/src/lib.rs')
| -rw-r--r-- | rust/pin-init/src/lib.rs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/rust/pin-init/src/lib.rs b/rust/pin-init/src/lib.rs index a5bb3939b58b..298a3e675b7f 100644 --- a/rust/pin-init/src/lib.rs +++ b/rust/pin-init/src/lib.rs @@ -1546,6 +1546,13 @@ pub unsafe trait ZeroableOption {} // SAFETY: by the safety requirement of `ZeroableOption`, this is valid. unsafe impl<T: ZeroableOption> Zeroable for Option<T> {} +// SAFETY: `Option<&T>` is part of the option layout optimization guarantee: +// <https://doc.rust-lang.org/stable/std/option/index.html#representation>. +unsafe impl<T> ZeroableOption for &T {} +// SAFETY: `Option<&mut T>` is part of the option layout optimization guarantee: +// <https://doc.rust-lang.org/stable/std/option/index.html#representation>. +unsafe impl<T> ZeroableOption for &mut T {} + /// Create an initializer for a zeroed `T`. /// /// The returned initializer will write `0x00` to every byte of the given `slot`. |