Error TS1206: Decorators are not valid here on a non-top level class

[bcherny]

function decorator(container, key) {}

class A {
    @decorator // OK
    fn(){}
}

let a = {
    b: class B {
        @decorator // Error TS1206: Decorators are not valid here
        fn(){}
    }
}

My use case is a controller class in an Angular 1.5 component:

const MyComponent = {
  bindings: {...},
  template: `...`,
  controller: class MyComponentController extends BaseComponent {
    @override
    foo() {...}
  }
}

abstract class BaseComponent {
  protected foo() {...}
}

[mhegazy]

duplicate of #8257 and #7342

[bcherny]

@mhegazy I saw both of those issues before filing this one - I think they are different than this.

#8257 is for an instantiated class
#7342 is for anonymous classes
This issue is for non-top level named classes.

[mhegazy]

it is neither instantiated nor anonymous that matters. it is class declaration (top level), vs. class expression (everything else). (similar to function declaration, vs function expression.)

[bcherny]

Got it - thanks.