Merge commit 'f4850f7292efa33759b4f7f9b7621268979e9914' into clippyup

[rust.git] / library / core / src / marker.rs

diff --git a/library/core/src/marker.rs b/library/core/src/marker.rs
index 3eff6033f8da9e16d29006232c4c8e20a0f470e4..42c342801976957a9696b25b92511653d313b918 100644 (file)
--- a/library/core/src/marker.rs
+++ b/library/core/src/marker.rs
@@ -809,6 +809,15 @@ pub trait Destruct {}
 #[cfg_attr(not(bootstrap), rustc_deny_explicit_impl)]
 pub trait Tuple {}
 
+/// A marker for things
+#[unstable(feature = "pointer_sized_trait", issue = "none")]
+#[cfg_attr(not(bootstrap), lang = "pointer_sized")]
+#[rustc_on_unimplemented(
+    message = "`{Self}` needs to be a pointer-sized type",
+    label = "`{Self}` needs to be a pointer-sized type"
+)]
+pub trait PointerSized {}
+
 /// Implementations of `Copy` for primitive types.
 ///
 /// Implementations that cannot be described in Rust