Auto merge of #102513 - RalfJung:no-more-unaligned-reference, r=cjgillot,scottmcm

[rust.git] / library / core / src / mem / manually_drop.rs

diff --git a/library/core/src/mem/manually_drop.rs b/library/core/src/mem/manually_drop.rs
index f577f102e8db24f6e03d65e152ca09ed6e5f3625..3d719afe49e4a5c0ff1b842e70b5ab75299c18ef 100644 (file)
--- a/library/core/src/mem/manually_drop.rs
+++ b/library/core/src/mem/manually_drop.rs
@@ -4,11 +4,12 @@
 /// A wrapper to inhibit compiler from automatically calling `T`’s destructor.
 /// This wrapper is 0-cost.
 ///
-/// `ManuallyDrop<T>` is subject to the same layout optimizations as `T`.
-/// As a consequence, it has *no effect* on the assumptions that the compiler makes
-/// about its contents. For example, initializing a `ManuallyDrop<&mut T>`
-/// with [`mem::zeroed`] is undefined behavior.
-/// If you need to handle uninitialized data, use [`MaybeUninit<T>`] instead.
+/// `ManuallyDrop<T>` is guaranteed to have the same layout as `T`, and is subject
+/// to the same layout optimizations as `T`. As a consequence, it has *no effect*
+/// on the assumptions that the compiler makes about its contents. For example,
+/// initializing a `ManuallyDrop<&mut T>` with [`mem::zeroed`] is undefined
+/// behavior. If you need to handle uninitialized data, use [`MaybeUninit<T>`]
+/// instead.
 ///
 /// Note that accessing the value inside a `ManuallyDrop<T>` is safe.
 /// This means that a `ManuallyDrop<T>` whose content has been dropped must not