diff options
| -rw-r--r-- | library/core/src/ptr/mod.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/library/core/src/ptr/mod.rs b/library/core/src/ptr/mod.rs index a4b89fc62f2..3a70981d2e1 100644 --- a/library/core/src/ptr/mod.rs +++ b/library/core/src/ptr/mod.rs @@ -1733,6 +1733,7 @@ pub(crate) unsafe fn align_offset<T: Sized>(p: *const T, a: usize) -> usize { /// by their address rather than comparing the values they point to /// (which is what the `PartialEq for &T` implementation does). /// +/// When comparing wide pointers, both the address and the metadata are tested for equality. /// However, note that comparing trait object pointers (`*const dyn Trait`) is unrealiable: pointers /// to values of the same underlying type can compare inequal (because vtables are duplicated in /// multiple codegen units), and pointers to values of *different* underlying type can compare equal |