Mix of mix cause error

[shrinktofit]

TypeScript Version: 3.7.x-dev.201xxxxx

Search Terms:

• Mixin composition
• Recursive mixin

Code

type Constructor<T = any, A extends any[] = any[]> = new (...a: A) => T;

function CallbackInvokable<T extends Constructor>(base: T) {
    return class extends base {
        protected invoke(...args: any[]) { }
    };
}

function EventTargeted<T extends Constructor>(base: T) {
    // A event target should be callback-invoke-able.
    // Error: Type "{ new (...a: any[]): CallbackInvokable<T>.(Anonymous class); prototype: CallbackInvokable<any>.(Anonymous class); } & T" is not a constructor type.
    return class extends CallbackInvokable(base) {
        public emit (...args: any[]) {
            this.invoke(...args); // "invoke" doesn't exist on type (Anonymous Class).
        }
    };
}

class Empty {};
class Test extends CallbackInvokable(Empty) {}; // OK
class Resource extends EventTargeted(Empty) {}; // OK

Expected behavior:
No error reported.

Actual behavior:
Error reported, as commented above.

Playground Link:

Related Issues:

[raymondfeng]

Is it a duplicate of #33739?

[RyanCavanaugh]

See #13807 and its related suggestions

[boconnell]

FWIW this seems more like a dupe of #32080 than #13807