DirectedGraph(IEnumerable <DirectedEdge> edges, IEnumerable <NodeIdentity> nodes)
{
ArgumentHelpers.ThrowIfNull(() => edges);
ArgumentHelpers.ThrowIfNull(() => nodes);
foreach (var node in nodes)
{
if (!_nodes.Add(node))
{
throw new DuplicateNodeException(nameof(nodes));
}
}
_edges = edges.GroupBy(e => e.From)
.ToDictionary(kv => kv.Key, kv => kv.ToList());
}
private Path(IEnumerable <NodeIdentity> steps)
{
ArgumentHelpers.ThrowIfNull(() => steps);
_steps = new List <NodeIdentity>(steps);
}
