c#中的算术<T>接口

Question

我探索了c#源代码参考.我偶然发现有趣的IArithmetic<T>界面.例如,Int32,Double包含评论的实现IArithmetic接口.我对这些细节很感兴趣.据我所知,它试图添加"支持"算术运算.但为什么他们评论？是否添加支持通用"运营商"的方法不好？

Answer 1

它可能由于性能原因而被废弃，而且可用性不高。

通过接口支持算术运算的原始类型确实不是一个很有吸引力的场景；由于必要的装箱和拆箱，与简单地使用值类型本身相比，性能会很糟糕。

有哪些可能的用途？好吧，第一个想到的是以下场景：

public Matrix<T> where T: IArithmetic<T>

or some such. Although this could be interesting, due to performance reasons, it would probably need to be solved some other way, not through interfaces; read this for very educated musing on the subject.

On top of all that, if you really need something similar to Arithmetic<T> you can always build your own with an added level of indirection.