private void RemoveInEdges([NotNull, InstantHandle] Predicate <TVertex> shouldRemove)
{
Debug.Assert(shouldRemove != null);
// Run over edges and remove each edge touching the vertices to remove
foreach (IEdgeList <TVertex, TEdge> outEdges in _vertexEdges.Select(pair => pair.Value))
{
// Collect indexes of edges to remove
var indexesToRemove = new List <int>();
var edgesToRemove = new List <TEdge>();
for (int i = 0; i < outEdges.Count; ++i)
{
TEdge outEdge = outEdges[i];
if (shouldRemove(outEdge.Target))
{
indexesToRemove.Add(i);
edgesToRemove.Add(outEdge);
}
}
// Remove collected edges
for (int i = indexesToRemove.Count - 1; i >= 0; --i)
{
outEdges.RemoveAt(indexesToRemove[i]);
}
EdgeCount -= indexesToRemove.Count;
Debug.Assert(EdgeCount >= 0);
NotifyEdgesRemoved(edgesToRemove);
}
}