C＃中的代表，参考解决时间

本文介绍了C＃中的代表，参考解决时间的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 我有关于.NET代表一个简单的问题。说我有这样的事情：I have a simple question about .net delegates. Say I have something like this: public void Invoke(Action<T> action) { Invoke(() => action(this.Value)); } public void Invoke(Action action) { m_TaskQueue.Enqueue(action); }第一个函数封装引用 THIS.VALUE 。在运行时，当第一，法泛型参数被调用，它将提供 THIS.VALUE 莫名其妙的第二个，但如何？这些进入了我的脑海里：The first function encloses a reference to this.Value. During runtime, when the first, method with generic parameter gets called, it will provide this.Value somehow to the second one, but how? These came into my mind: 拨打按值（结构） - 的电流值 THIS.VALUE 获取传递，因此，如果 m_TaskQueue 在5分钟后执行它，价值会不会在它的最近的状态，这将是不管它是什么时候第一次引用。 拨打引用（引用类型） - 其最新值的国家将执行行动中，但如果我改变引用 THIS.VALUE $来执行行动之前，另一个参考，它仍然会指向旧的参考 拨打的名字（均） - 其中 THIS.VALUE 时的动作被调用将被评估。我相信，在实际执行将举行一个参照这然后评估值在该委托的，因为有实际的执行过程中是名称的电话。Call by value (struct) - the current value of this.Value gets passed, so if the m_TaskQueue executes it 5 minutes later, the value will not be in it's recent state, it will be whatever it was when first referencing.Call by reference (reference type) - then the most recent state of Value will be referenced during execution of action but if I change this.Value to another reference before execution of action, it will still be pointing to the old referenceCall by name (both) - where this.Value will be evaluated when the action gets called. I believe the actual implementation would be holding a reference to this then evaluate Value on that during actual execution of delegate since there is no call by name.我相信它会被调用的名字风格，但找不到任何文档，以便知道是否有一个良好定义的行为。这个类是像斯卡拉或二郎的演员，所以我需要它是线程安全的。我不想调用函数间接引用值马上，将在一个安全的线程这按对象 m_TaskQueue 。I assume it would be Call by name style but could not find any documentation so wondering if it is a well defined behavior. This class is something like an Actor in Scala or Erlang so I need it to be thread safe. I do not want Invoke function to dereference Value immediately, that will be done in a safe thread for this object by m_TaskQueue.感谢。推荐答案我来回答你的问题描述什么是code，我们实际上产生了这一点。我会重命名混淆的名称的其他Invoke方法;这是没有必要了解什么是怎么回事。Let me answer your question by describing what code we actually generate for this. I'll rename your confusingly-named other Invoke method; it's not necessary to understanding what's going on here.假设你说class C<T>{ public T Value; public void Invoke(Action<T> action) { Frob(() => action(this.Value)); } public void Frob(Action action) { // whatever }}编译器生成code，仿佛你已经实际写入：The compiler generates code as though you had actually written:class C<T>{ public T Value; private class CLOSURE { public Action<T> ACTION; public C<T> THIS; public void METHOD() { this.ACTION(this.THIS.Value); } } public void Invoke(Action<T> action) { CLOSURE closure = new CLOSURE(); closure.THIS = this; closure.ACTION = action; Frob(new Action(closure.METHOD)); } public void Frob(Action action) { // whatever }}这是否回答你的问题？Does that answer your question? 这篇关于C＃中的代表，参考解决时间的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！