c# - 这种使用泛型的模式有名称吗？

Question

//this class (or interface if you like) is set up as generic...
public abstract class GenericBase<T> 
{
    public T PerformBasicTask(T in) { ... }
}

//... but is intended to be inherited by objects that close the generic...
public class ConcreteForDates:GenericBase<DateTime>
{
    public DateTime PerformSpecificTask(DateTime in) { ... }
}

//... so that consuming code never knows that a generic is involved
var myDateConcrete = new ConcreteForDates(); //look ma, no GTP!
//These two methods look alike, and there is no generic type inference,
//even with PerformBasicTask().
var basicResult = myDateConcrete.PerformBasicTask(DateTime.Now);
var specificResult = myDateConcrete.PerformSpecificTask(DateTime.Today);

//does not compile because T is understood by inheritance to be a DateTime,
//even though PerformBasicTask()'s implementation may well handle an int.
var anotherBasicResult = myDateConcrete.PerformBasicTask(1);

我已经多次看到并使用过这种模式，它对于跨一系列特定于类型的子类提供通用功能非常有用。例如，这可能是 Controller /演示器的模型，特定于一种域对象类型，该域对象是该类用于控制的页面的中心；检索/持久化等基本操作可能使用 100% 的通用功能，但绑定(bind)/解除绑定(bind)可能非常具体。

这种不向最终用户公开泛型的泛型声明模式有名称吗？

Answer 1

我相信这不是一种模式，而是 .NET Framework 的泛型类型子系统的细节，它通过用具体类型(在您的示例 DateTime 中)替换泛型类型参数来在运行时生成具体类型。关于共享共同行为的所有其他事情被称为 Inheritance