Why the limitation on exporting an interface by default in TypeScript?

Question

I\'m using TypeScript 1.5 beta, and I\'m trying to export an interface as the default export. The following code causes an error in both Visual Studio and WebStorm:

Answer 1

it is not necessary to export the interface

// Foo.ts
interface Foo {}

// Bar.ts
class Bar {
    constructor(foo:Foo) {}
}