Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Implement cursors for BTreeMap #105641

Merged
merged 2 commits into from
Feb 8, 2023
Merged

Implement cursors for BTreeMap #105641

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
eb70c82
BTreeMap: Change internal insert function to return a handle
Amanieu Dec 8, 2022
36831b3
BTreeMap: Add Cursor and CursorMut
Amanieu Dec 8, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
22 changes: 22 additions & 0 deletions library/alloc/src/collections/btree/borrow.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -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)]
Expand Down
Loading