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| -rw-r--r-- | src/liballoc/collections/linked_list.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/liballoc/collections/linked_list.rs b/src/liballoc/collections/linked_list.rs index bfa4045787f..952e5317840 100644 --- a/src/liballoc/collections/linked_list.rs +++ b/src/liballoc/collections/linked_list.rs @@ -1496,6 +1496,31 @@ impl<'a, T> CursorMut<'a, T> { } } + /// Removes the current element from the `LinkedList` without deallocating the list node. + /// + /// The node that was removed is returned as a new `LinkedList` containing only this node. + /// The cursor is moved to point to the next element in the current `LinkedList`. + /// + /// If the cursor is currently pointing to the "ghost" non-element then no element + /// is removed and `None` is returned. + #[unstable(feature = "linked_list_cursors", issue = "58533")] + pub fn remove_current_as_list(&mut self) -> Option<LinkedList<T>> { + let unlinked_node = self.current?; + unsafe { + self.current = unlinked_node.as_ref().next; + self.list.unlink_node(unlinked_node); + + unlinked_node.as_mut().prev = None; + unlinked_node.as_mut().next = None; + Some(LinkedList { + head: Some(unlinked_node), + tail: Some(unlinked_node), + len: 1, + marker: PhantomData, + }) + } + } + /// Inserts the elements from the given `LinkedList` after the current one. /// /// If the cursor is pointing at the "ghost" non-element then the new elements are |