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use crate::{NodeRef, Tree, TreeVariant, memory::MemoryPolicy, pinned_storage::PinnedStorage};
impl<V, M, P> Clone for Tree<V, M, P>
where
V: TreeVariant,
M: MemoryPolicy,
P: PinnedStorage,
P::PinnedVec<V>: Default,
V::Item: Clone,
{
/// Clones the tree.
///
/// # See also
///
/// * [`clone_as_tree`]: to clone a subtree rooted at a given node as a separate tree.
///
/// [`clone_as_tree`]: crate::NodeRef::clone_as_tree
///
/// # Examples
///
/// ```
/// use orx_tree::*;
///
/// // 0
/// // ╱ ╲
/// // ╱ ╲
/// // 1 2
/// // ╱ ╲ ╱ ╲
/// // 3 4 5 6
/// // | | ╱ ╲
/// // 7 8 9 10
///
/// let mut tree = DynTree::new(0);
///
/// let mut root = tree.root_mut();
/// let [id1, id2] = root.push_children([1, 2]);
///
/// let mut n1 = tree.node_mut(id1);
/// let [id3, _] = n1.push_children([3, 4]);
///
/// tree.node_mut(id3).push_child(7);
///
/// let mut n2 = tree.node_mut(id2);
/// let [id5, id6] = n2.push_children([5, 6]);
///
/// tree.node_mut(id5).push_child(8);
/// tree.node_mut(id6).push_children([9, 10]);
///
/// let bfs: Vec<_> = tree.root().walk::<Bfs>().copied().collect();
/// assert_eq!(bfs, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
///
/// // clone the entire tree
///
/// let clone = tree.clone();
/// let bfs: Vec<_> = clone.root().walk::<Bfs>().copied().collect();
/// assert_eq!(bfs, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
///
/// // indices are valid only for their trees
///
/// let indices: Vec<_> = clone.root().indices::<Bfs>().collect();
///
/// assert_eq!(tree.get_node(indices[2]), None);
/// assert_eq!(tree.try_node(indices[2]), Err(NodeIdxError::OutOfBounds));
///
/// assert_eq!(clone.get_node(id2), None);
/// assert_eq!(clone.try_node(id2), Err(NodeIdxError::OutOfBounds));
///
/// assert_eq!(clone.node(indices[2]).data(), &2);
/// ```
fn clone(&self) -> Self {
match self.get_root() {
None => Self::default(),
Some(root) => {
let mut tree = Self::new_with_root(root.data().clone());
for child in root.children() {
tree.root_mut().push_child_tree(child.as_cloned_subtree());
}
tree
}
}
}
}