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in Technique[技术] by (71.8m points)

c# - How to inherit from a generic parameter?

I'm basically wanting to do this:

class UILockable<T> : T
    where T : UIWidget
{
}

However, this doesn't work. I've seen people recommend that you do this:

class UILockable<T>
    where T : UIWidget
{
    private T _base;
}

This would require me to override each function UILockable would need and forward it to T. This is impossible since T may derive from UIWidget and have unique abstract/virtual methods of its own.

Is there no way to simply inherit from T?

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You can't inherit from the generic type parameter. C# generics are very different from C++ templates. Inheriting from the type parameter requires the class to have a completely different representation based on the type parameter, which is not what happens with .NET generics. They are identical at the IL and native level (for all reference type arguments).


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