Generic abstract class declaration

[hersentino]

I would like to create something like this:

abstract class A<T> {
  protected abstract method1: () => T;
}

class B extends A<string> {
  protected method1 = () => "helloword";
}

So I did :

a.ts :

import { Model, modelAction } from "mobx-keystone";

function createA<T>() {
  abstract class A extends Model({}) {
    @modelAction
    protected abstract method1: () => T;
  }

  return A;
}

export default createA;

b.ts :

import { ExtendedModel, model } from "mobx-keystone";
import createA from "./a";

@model("B")
class B extends ExtendedModel(createA<string>(), {}) {
  protected method1 = () => "helloword";
}

export default B;

but i'm getting those errors :

• Return type of exported function has or is using private name 'A'.
• 'extends' clause of exported class 'B' has or is using private name 'A'.

errors

 

If I set declaration to false in my tsconfig.js, there are no more errors. But I need declaration to be true because my project is a lib so I need to generate and export .d.ts.

Can you help me to figure out what's wrong ?

Thanks :)

[sisp]

Have you looked at the "Factory Pattern / Generics" section in the docs? If you don't need runtime type-checking, you can have generic models without a factory.

[hersentino]

Oh it's exactly what i was looking for, thanks !