Function is_vertex_zombie

atomic-core/src/output/alive/retrieve/classify.rs:121–135

Check if a node is a zombie (deleted but with live connections). A zombie node has at least one deleted block parent edge, meaning something explicitly deleted it. Uses typed [`ParentEdgeKind`] matching for clarity.

(
    txn: &T,
    node: &GraphNode<NodeId>,
)

/// something explicitly deleted it. Uses typed [`ParentEdgeKind`]
/// matching for clarity.
pub(super) fn is_vertex_zombie<T: GraphTxnT>(
    txn: &T,
    node: &GraphNode<NodeId>,
) -> Result<bool, PristineError> {
    // Include deleted edges so we can see deletion markers
    let parents = txn.iter_parents(*node, true)?;

    for parent in &parents {
        if parent.kind == ParentEdgeKind::BlockDeleted {
            return Ok(true); // Has a deleted block parent = zombie
        }
    }

    Ok(false)
}