Question

是否有attribute或pattern告诉编译器不允许覆盖可重写方法？

例如：

Vehicle

public class Vehicle
{
    public virtual void Start() { }
}

Car

public class Car : Vehicle
{
    // ################
    [DontAllowOverrideAgain] //I need something like this attribute
    // ################
    public override void Start()
    {
        // Todo => codes that every car must invoke before start ...
        CarStart();
        // Todo => codes that every car must invoke after start ...
    }

    public virtual void CarStart() { }
}

CoupeCar

public class CoupeCar : Car
{
    // throw and error or show a message to developer
    public override void Start() { }

    public override void CarStart() { }
}

Answer 1

当然，只需将第一个替代项创建为sealed，这将导致开发人员可以看到的编译时失败

public class Car : Vehicle
{
    public sealed override void Start()
    {
        // Todo => codes that every car must invoke before start ...
        CarStart();
        // Todo => codes that every car must invoke after start ...
    }

    public virtual void CarStart() { }
}

Answer 2

在这里，使用密封

参考https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/sealed

public class Car : Vehicle
{
     sealed protected override void Start()
    {
        // Todo => codes that every car must invoke before start ...
        CarStart();
        // Todo => codes that every car must invoke after start ...
    }

    public virtual void CarStart() { }
}

C＃不要覆盖重写的方法

2 个答案: