TypeScript/tests/cases/compiler/doubleMixinConditionalTypeBaseClassWorks.ts

8 lines
363 B
TypeScript

type Constructor = new (...args: any[]) => {};
const Mixin1 = <C extends Constructor>(Base: C) => class extends Base { private _fooPrivate: {}; }
type FooConstructor = typeof Mixin1 extends (a: Constructor) => infer Cls ? Cls : never;
const Mixin2 = <C extends FooConstructor>(Base: C) => class extends Base {};
class C extends Mixin2(Mixin1(Object)) {}