具有继承性的可扩展Fluent接口 [英] Scaleable Fluent Interface with Inheritance

问题描述

我正在尝试编写一个可以很好地扩展的Fluent Interface API。什么结构允许强类型，继承和状态满（如在类类型中）？

I am trying to write a Fluent Interface API that can scale well. What structure would allow for strong types, inheritance, and state-full(as in the class type)?

例如

 class A
 {
     public A PerformFoo()
     {
         //do stuff
         return this;
     }
 }
 class B : A
 {

 }

我希望B级在致电PerformFoo时返回B而不是A，理想情况下我宁愿远离

I would like class B when calling PerformFoo to return B not A, ideally I would prefer to stay away from

public class B : A
{
    public new B PerformFoo()
    {
        return (B)base.PerformFoo();
    }
}

至于不必覆盖或新的每个方法儿童班。我相信我需要使用使用类型签名的泛型。

As to not have to override or new Every method in child classes. I believe I would need to use generics that use Type signatures.

我不想使用扩展方法但似乎无法在执行时获得正确的结构与[链接]的答案中的铸造（T）一样流畅的接口和继承在C＃

I don't want to use extension methods but can't seem to get the structure right when doing it with casting (T) like in the answer for [a link]Fluent interfaces and inheritance in C#

推荐答案

最后我想出了结构

public class A {}
public class B : A {}
public class C<T> : A where T : C<T>
{/*most methods return T*/}
public class D:C<D>
{/*all methods return this*/}
public class E<T>:C<T> where T:E<T>
{/*all methods return T*/}
public class F:E<F>{}

现在即使是专门的泛型也会返回原来的来电者

now even specialized generics will still return the original caller

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