Preserving source type in toJS return value

[jimkyndemeyer]

The current toJS implementation has the following signature:

typescript
function toJS(source: any, detectCycles?: boolean, __alreadySeen?: [any, any][]): any;

I'd like to see it return the same type as it takes as source, so I don't have to cast the return value:

function toJS<T>(source: T, detectCycles?: boolean, __alreadySeen?: [any, any][]): T;

I tested with TypeScript 1.8, and the signature change seems compatible with existing code as TypeScript simply infers T.

[mweststrate]

Closed, as this will be added to 3.0