/// <summary>
/// Get sweep line of instance scopes
/// at end returns <c>null</c>
/// </summary>
/// <param name="view">View where scopes are stepped</param>
/// <returns>Sweep line if there are available scopes, <c>null</c> otherwise</returns>
public IEnumerable <InstanceScope> Step(ExecutionView view)
{
if (_enumerators == null)
{
//stepper is already at the end
return(null);
}
var result = (from enumerator in _enumerators select enumerator.Current).ToArray();
var currentEnds = from scope in result select scope.End;
var earliestEnd = view.EarliestBlock(currentEnds);
foreach (var enumerator in _enumerators)
{
if (enumerator.Current.End == earliestEnd)
{
if (!enumerator.MoveNext())
{
//there is no more scopes for instance
_enumerators = null;
}
break;
}
}
return(result);
}
public ScopeMonitor(IEnumerable <Instance> instances, ExecutionView view)
{
_monitoredInstances = new HashSet <Instance>(instances);
var instanceStarts = from instance in instances where instance.CreationBlock != null select instance.CreationBlock;
var earliestStart = view.EarliestBlock(instanceStarts);
initializeScopes(view, earliestStart);
}