.Net 2.0 新功能:迭代器(Iterators)
什么是迭代器?
迭代器是方法、get访问器或运算符,它能使您能够在类或者结构中支持foreach迭代,而不必实现整个IEnumerable接口。
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迭代器是可以返回相同类型的值的有序序列的一段代码
迭代器可用作方法、运算符或get访问器的代码体
迭代器代码使用yield return语句一次返回每个元素
yield break将终止迭代
可以在类中实现做个迭代器。每个迭代器都必须像任何类成员一样有唯一的名称,并且可以在foreach语句中可调用
迭代器的返回类型必须为IEnumerable、IEnumberator、IEnumerbale<T>或者IEnumberator<T>
foreach(int i in YieldTest. Power)
{
}