public IEnumerator <IList <T> > GetEnumerator()
{
var list = this.m_List;
if (list.Count > 0)
{
foreach (IList <T> sequence in Permutable <T> .Permute(list, 0, list.Count - 1))
{
yield return(sequence);
}
}
}
static IEnumerable Permute <TElement>(IList <TElement> list, int depth, int count)
{
if (count == depth)
{
yield return(list);
}
else
{
for (var i = depth; i <= count; ++i)
{
Swap(list, depth, i);
foreach (var sequence in Permutable <T> .Permute(list, 1 + depth, count))
{
yield return(sequence);
}
Swap(list, depth, i);
}
}
}