How to make in TypeScript analogue of Java class literal with generics?

user6096764 :

I need to make analogue of Java class literal with generics in TypeScript.

This is my Class class:

class Class<T> {

    public getName(): string {
        return ...;
    }
}

And this is my attempt to create class literal.

declare global {

    interface Object {

        class<T extends object>(this: T): Class<T>;//LINE X
    }
}

For example, for class Foo I want to get literal this way: Foo.class(). However, at LINE X I have some mistake because it returns Class<typeof Foo> instead of Class<Foo>. How to fix it?

Titian Cernicova-Dragomir :

Since this is meant to be called on classes, you will need a restriction on T to ensure that the method only shows up on classes. This can be done using a constructor signature (new (...a: any[])=> any)

Since T is a class type and you want the instance type you can use the predefined conditional type InstanceType to get the instance type from the class type:

declare global {
    interface Object {
        class<T extends new (...a: any[])=> any>(this:T): Class<InstanceType<T>>; 
    }
}

How to make in TypeScript analogue of Java class literal with generics?

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