C# type rebinding, very ngerful

iteye_18591

于 2009-04-11 20:58:00 发布

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文章标签： c# c/c++

本文通过一个C#程序示例介绍了如何模拟C++中常见的泛型类型重绑定功能。示例展示了如何定义泛型类及其实现，并通过特定方式实现类型重绑定。

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C# type rebinding,a program demonstrating what I can figure out about simulating
generic type rebinding in C# (which is so common in C++ programs), it may look
stupid, but it really works as intended.

using System; class BaseG { public class ReboundType<_T> { public virtual _T T {get; set;} public virtual void Do() {} } public virtual ReboundType<_T> Rebind<_T>() { return new ReboundType<_T>(); } } class G : BaseG { public new class ReboundType<_T> : BaseG.ReboundType<_T> { _T t; public override _T T { get {return t;} set{t = value;} } public override void Do() { Console.WriteLine("G.ReboundType<>.t = {0}", t); } } public override BaseG.ReboundType<_T> Rebind<_T>() { return new ReboundType<_T>(); } } class User<_G> where _G : BaseG, new() { BaseG.ReboundType<String> gs = new _G().Rebind<String>(); public void Test() { gs.T = "abc"; gs.Do(); } } class App { static void Main(String[] args) { User<G> ug = new User<G>(); ug.Test(); } }