diff options
Diffstat (limited to 'library/alloc/src/collections/btree/borrow.rs')
-rw-r--r-- | library/alloc/src/collections/btree/borrow.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/library/alloc/src/collections/btree/borrow.rs b/library/alloc/src/collections/btree/borrow.rs index 016f139a5..000b9bd0f 100644 --- a/library/alloc/src/collections/btree/borrow.rs +++ b/library/alloc/src/collections/btree/borrow.rs @@ -41,6 +41,28 @@ impl<'a, T> DormantMutRef<'a, T> { // SAFETY: our own safety conditions imply this reference is again unique. unsafe { &mut *self.ptr.as_ptr() } } + + /// Borrows a new mutable reference from the unique borrow initially captured. + /// + /// # Safety + /// + /// The reborrow must have ended, i.e., the reference returned by `new` and + /// all pointers and references derived from it, must not be used anymore. + pub unsafe fn reborrow(&mut self) -> &'a mut T { + // SAFETY: our own safety conditions imply this reference is again unique. + unsafe { &mut *self.ptr.as_ptr() } + } + + /// Borrows a new shared reference from the unique borrow initially captured. + /// + /// # Safety + /// + /// The reborrow must have ended, i.e., the reference returned by `new` and + /// all pointers and references derived from it, must not be used anymore. + pub unsafe fn reborrow_shared(&self) -> &'a T { + // SAFETY: our own safety conditions imply this reference is again unique. + unsafe { &*self.ptr.as_ptr() } + } } #[cfg(test)] |