Any way to declare a nest class structure in typescript?

Question

I'm interested in defining an existing framework (openlayers.d.ts) but cannot figure out how to express the fact that OpenLayers.Layer is both a class and a namespace for OpenLayers.Layer.Markers. I believe this makes Markers a nested class of Layer.

usage:

l = new OpenLayers.Layer(...); // this is a base class, never do this m = new OpenLayers.Layer.Markers(...); 

How would you declare both the Layer and Markers class in typescript?

Answer 1

This seems like it has been fixed in versions 0.9.1.1 and later. You just have to create a module with the same name as the class where you want to nest types, and put your nested types in it.

More concretely, this is how you do it:

declare module a {     class b     {     }      module b     {         class c         {         }     } }  var myB = new a.b(); var myC = new a.b.c(); 

This works as well when nesting types in typescript code with the export keyword:

export module a {     export class b     {     }      export module b     {         export enum c         {             C1 = 1,             C2 = 2,             C3 = 3,         }     } } 

As mentioned by the user @recursive in the comments below, the order of declaration is important. So the class definition must be located before the module with the nested types.