/// <summary>
/// Pushes to currently active branch
/// </summary>
/// <param name="evt"></param>
public void Push(EventBase evt)
{
var currentLayer = _layers.Peek();
var newLayer = new List <BeamNode>();
foreach (var pushNode in currentLayer)
{
var oldBeam = new HashSet <BeamNode>(_beam);
var newNode = new BeamNode(pushNode, evt);
_beam.Remove(pushNode);
_beam.Add(newNode);
try
{
_layers.Push(new List <BeamNode>()
{
newNode
});
evt.Accept(this);
}
finally
{
newLayer.AddRange(_beam.Except(oldBeam));
//auto pop layers so Pops within accept works consistently
//the popped layers are not interesting - we care only about the top ones
while (_layers.Peek() != currentLayer)
{
_layers.Pop();
}
}
}
_layers.Push(newLayer);
}