public override IEnumerable <IEntity> Execute(ExecutionOptions options)
{
var visited = new HashSet <IEntity>(EntityPathEqualityComparer.Default);
var firstEvaluation = First.Execute(options);
foreach (var item in firstEvaluation)
{
visited.Add(item);
if (Second.Match(item))
{
yield return(item);
}
}
var secondEvaluation = Second.Execute(options);
foreach (var item in secondEvaluation)
{
if (!visited.Contains(item) && First.Match(item))
{
yield return(item);
}
}
}
public abstract IEnumerable <IEntity> Execute(ExecutionOptions options);