Rollup merge of rust-lang#88722 - WaffleLapkin:unsafe_cell_const_get_…

…mut, r=dtolnay Make `UnsafeCell::get_mut` const
workingjubilee · Sep 12, 2021 · 3dc37c6 · 3dc37c6
2 parents 9116186 + 2c30162
commit 3dc37c6
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/library/core/src/cell.rs b/library/core/src/cell.rs
@@ -1916,7 +1916,8 @@ impl<T: ?Sized> UnsafeCell<T> {
     /// ```
     #[inline(always)]
     #[stable(feature = "unsafe_cell_get_mut", since = "1.50.0")]
-    pub fn get_mut(&mut self) -> &mut T {
+    #[rustc_const_unstable(feature = "const_unsafecell_get_mut", issue = "88836")]
+    pub const fn get_mut(&mut self) -> &mut T {
         &mut self.value
     }