Function resolve_vertex

atomic-core/src/apply/edge.rs:112–127

Resolve a position to a vertex in the graph. Uses `find_block` for forward context (containing position) and `find_block_end` for predecessor context (ending at position).

(
    txn: &T,
    pos: Position<NodeId>,
    is_predecessor: bool,
)

/// Uses `find_block` for forward context (containing position) and
/// `find_block_end` for predecessor context (ending at position).
pub(super) fn resolve_vertex<T: GraphTxnT>(
    txn: &T,
    pos: Position<NodeId>,
    is_predecessor: bool,
) -> Result<GraphNode<NodeId>, LocalApplyError> {
    if pos.change.is_root() {
        return Ok(GraphNode::root());
    }

    if is_predecessor {
        txn.find_block_end(pos)
    } else {
        txn.find_block(pos)
    }
    .map_err(|_| LocalApplyError::BlockNotFound { position: pos })
}

/// Write a single NewEdge operation to the graph.
///