public FailureMessages Merge(FailureMessages failure)
{
var result = this;
foreach (var f in failure.All <FailureMessage>())
{
result = result.With(f);
}
return(result);
}
private IEnumerable <T> All <T>() where T : FailureMessage
{
if (this == Empty)
{
yield break;
}
if (head is T)
{
yield return((T)head);
}
foreach (T message in tail.All <T>())
{
yield return(message);
}
}
