Abstract class type argument inference

It would be good if TypeScript can infer the type of an extended class of an generic abstract class:

abstract class A<T> {
    abstract a: T;
    get(): T {
        return '' as any;
    }
}

class B extends A {
    a: 'helloworld';
}

const b = new B():
b.get(); // string

In a similar fashion, it does inference elsewhere.

[tinganho]

@aluanhaddad I suggested it applied to abstract, mostly because abstract implies there will be at least another declaration. But after thinking about it, I cannot see why it’s not applicable to normal classes as well.

[infeng]

I hope it apply to normal class also. see https://github.com/ant-design/ant-design/issues/4324