Hover information over export default function does not work

[Deathspike]

If you have a file with the following contents:

export default function(a: string, b: number) {
  return Promise.resolve(a + b);
}

Then there is no way to see function signature through hovering. Basically, because it has no name? It would be nice to get the hover information over the export or default keyword :-)

[basarat]

Raised with the TypeScript team : microsoft/TypeScript#2736 ❤️