/// <summary>
/// Initializes a new instance of the Continuation class.
/// The evaluator and its chain of evaluators back to the beginning have to be cloned because they
/// hold information about the progress of the evaluation. When the evaluation proceeds
/// these evaluators might be altered, damaging the ability to continue, which is what makes the
/// clone necessary.
/// </summary>
/// <param name="eval">The continuation to return to when applied.</param>
private Continuation(Evaluator eval)
: base(null, new ArgsInfo(1, 1, false))
{
this.savedEvaluator = eval.CloneChain();
}
