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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:41 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:41 +0000 |
commit | 4f9fe856a25ab29345b90e7725509e9ee38a37be (patch) | |
tree | e4ffd8a9374cae7b21f7cbfb352927e0e074aff6 /library/alloc/src/collections/btree/borrow.rs | |
parent | Adding upstream version 1.68.2+dfsg1. (diff) | |
download | rustc-4f9fe856a25ab29345b90e7725509e9ee38a37be.tar.xz rustc-4f9fe856a25ab29345b90e7725509e9ee38a37be.zip |
Adding upstream version 1.69.0+dfsg1.upstream/1.69.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-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)] |