diff options
| -rw-r--r-- | library/core/src/marker.rs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs index 385c288db12..1d073a6d649 100644 --- a/library/core/src/marker.rs +++ b/library/core/src/marker.rs @@ -817,6 +817,13 @@ pub trait DiscriminantKind { /// This can be used to declare that a constant with a generic type /// will not contain interior mutability, and subsequently allow /// placing the constant behind references. +/// +/// # Safety +/// +/// This trait is a core part of the language, it is just expressed as a trait in libcore for +/// convenience. Do *not* implement it for other types. +// FIXME: Eventually this trait should become `#[rustc_deny_explicit_impl]`. +// That requires porting the impls below to native internal impls. #[lang = "freeze"] #[unstable(feature = "freeze", issue = "121675")] pub unsafe auto trait Freeze {} |