c# - 泛型的继承

Question

假设我们有以下类:

abstract class Vehicle {/**/}

class Truck : Vehicle {/**/}
class Bus : Vehicle {/**/}
//etc...

abstract class VehicleWheel<TVehicle> where TVehicle : Vehicle {/**/}

class TruckWheel : VehicleWheel<Truck> {/**/}
class BusWheel : VehicleWheel<Bus> {/**/}

现在，我想创建通用类“VehicleWheelCarrier”，它继承自 Vehicle，并有 1 个参数，可以是任何类型的轮子:

abstract class VehicleWheelCarrier<TWheel> : Vehicle where TWheel:VehicleWheel

不幸的是，这无法编译，因为 VehicleWheel 需要参数。

如何解决？

Answer 1

你可以像这样为 wheel 添加一个非通用的基础:

abstract class Vehicle {/**/}

class Truck : Vehicle {/**/}
class Bus : Vehicle {/**/}
//etc...

abstract class VehicleWheelBase { internal VehicleWheelBase() { } /*Non-generic definitions of Wheel*/}
abstract class VehicleWheel<TVehicle> : VehicleWheelBase where TVehicle : Vehicle {/**/}

class TruckWheel : VehicleWheel<Truck> {/**/}
class BusWheel : VehicleWheel<Bus> {/**/}

abstract class VehicleWheelCarrier<TWheel> : Vehicle where TWheel : VehicleWheelBase