Rollup merge of #88722 - WaffleLapkin:unsafe_cell_const_get_mut, r=dtolnay

Make `UnsafeCell::get_mut` const
2021-09-13 21:20:39 +02:00 · 2021-09-13 21:20:39 +02:00 · 5eb77838ea
commit 5eb77838ea
parent b3bb7868f8 2c30162380
1 changed files with 2 additions and 1 deletions
--- 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
    }