C # 泛型“哪里约束”与“任何泛型类型”定义？

让我举个例子:

  1. 我有一些通用的类/接口定义:

    interface IGenericCar< T > {...}

  2. 我有另一个类/接口，我想与上面的类关联，例如:

    interface IGarrage< TCar > : where TCar: IGenericCar< (**any type here**) > {...}

Basically, I want my generic IGarrage to be dependent on IGenericCar, regardless if it's IGenericCar<int> or IGenericCar<System.Color>, because I don't have any dependency to that type.

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Would it make any sense to do something like:

interface IGenericCar< T > {...}
interface IGarrage< TCar, TCarType >
where TCar: IGenericCar< TCarType > {...}
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最佳答案

通常有两种方法可以实现这一点。

Option1: Add another parameter to IGarrage representing the T which should be passed into the IGenericCar<T> constraint:

interface IGarrage<TCar,TOther> where TCar : IGenericCar<TOther> { ... }

Option2: Define a base interface for IGenericCar<T> which is not generic and constrain against that interface

interface IGenericCar { ... }
interface IGenericCar<T> : IGenericCar { ... }
interface IGarrage<TCar> where TCar : IGenericCar { ... }

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