public void Append(DoubleLinkedListEntry <T> next)
{
if (Forward != null)
{
throw new Exception("Already Forward Linked");
}
if (next.Backward != null)
{
throw new Exception("Argument is Already Backward Linked");
}
Forward = next;
next.Backward = this;
}
private static Dictionary <NoteName, DoubleLinkedListEntry <Note> > CreateNameIndex(
DoubleLinkedListEntry <Note> chromatic)
{
var res = new Dictionary <NoteName, DoubleLinkedListEntry <Note> >();
var root = chromatic;
var el = chromatic;
do
{
res.Add(el.Item.Name, el);
el = el.Forward;
} while (!ReferenceEquals(root, el));
return(res);
}
internal ScaleEnumerator(DoubleLinkedListEntry <Note> root, Pattern pattern)
{
_root = root;
_pattern = pattern;
}
private IEnumerable <Note> EnumerateNotes(DoubleLinkedListEntry <Note> root, Pattern pattern)
{
return(new ScaleEnumerator(root, pattern));
}