import * as alias syntax doesn't work with export = function unless merged with namespace

[weswigham]

declare module "foo" {
  function foo(): void;
  export = foo;
}

Can't be included via import * as f from "foo";.
(test.ts(1,20): error TS2497: Module '"foo"' resolves to a non-module entity and cannot be imported using this construct.)
Whereas

declare module "foo" {
  function foo(): void;
  namespace foo {}
  export = foo;
}

Can be. The distinction seems artificial.

[mhegazy]

there is no way in an ES6 module to achieve this. the parallel in an ES6 module world is to default export. import * will import the namespace component of the export, if it exists, if it does not, it is an error. That you can call the alias as a function in the second case, is the bug i would say.