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Diffstat (limited to '')
| -rw-r--r-- | library/core/src/marker.rs | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs index 2c5789795..b8239ed88 100644 --- a/library/core/src/marker.rs +++ b/library/core/src/marker.rs @@ -343,7 +343,7 @@ pub trait StructuralEq { /// If you try to implement `Copy` on a struct or enum containing non-`Copy` data, you will get /// the error [E0204]. /// -/// [E0204]: ../../error-index.html#E0204 +/// [E0204]: ../../error_codes/E0204.html /// /// ## When *should* my type be `Copy`? /// @@ -800,6 +800,15 @@ impl<T: ?Sized> Unpin for *mut T {} #[rustc_on_unimplemented(message = "can't drop `{Self}`", append_const_msg)] pub trait Destruct {} +/// A marker for tuple types. +/// +/// The implementation of this trait is built-in and cannot be implemented +/// for any user type. +#[unstable(feature = "tuple_trait", issue = "none")] +#[cfg_attr(not(bootstrap), lang = "tuple_trait")] +#[rustc_on_unimplemented(message = "`{Self}` is not a tuple")] +pub trait Tuple {} + /// Implementations of `Copy` for primitive types. /// /// Implementations that cannot be described in Rust |