/// <summary>
/// Returns an enumerator that iterates through the collection.
/// </summary>
/// <returns>
/// A <see cref="T:System.Collections.Generic.IEnumerator`1"/> that can be used to iterate through the collection.
/// </returns>
public virtual IEnumerator<T> GetEnumerator() {
LazyList<T> list = this;
do {
yield return list.Head;
list = list.Tail;
}
while (!list.IsEmpty);
}
/// <summary>
/// Initializes a new instance of the <see cref="LazyList{T}"/> class.
/// </summary>
/// <param name="head">The head.</param>
/// <param name="tail">The tail.</param>
private LazyList(T head, LazyList<T> tail) {
_head = head;
_tail = tail;
}
