打字稿中的泛型类型变量约束

Question

I am looking for the equivalent of the following c# syntax for typescript

public abstract class PBaseHierarchical<T> : PBase where T : PBaseHierarchical<T>
    {
...
}

I only find the constraint "extends" which would be the following in typescript:

export abstract class PBaseHierarchical<T extends PBaseHierarchical<T>> extends PBase {
...
}

But from my understanding "extends" says that T should inherit from PBaseHierarchical. What I want is that T is of type PBaseHierarchical.

Thanks a lot for any help !

Answer 1

extends in type constraint is actually covers both:

T is of type PBaseHierarchical or T "extends" PBaseHierarchical

Pretty much the same as where T : PBaseHierarchical in C#.

Also pay attention that types are compared structurally in Typescript.