Export default on interface not allowed

[basarat]

Raised on SO. The following is an error:

export default interface Foo {
}

By design or bug?

[ahejlsberg]

It's by design. You can accomplish the exact same effect with

interface Foo {
    // stuff
}
export default Foo;

More discussion in #3095.

[clavecoder]

I'm OK with leaving it as is if the reasoning is that interfaces, et al, are not vaid EcmaScript and #3917 is implemented.

[cdaringe]

hi all,

i unexpectedly encountered this too.

@ahejlsberg, can you clarify on your remarks further? the discussion in #3095 seems to be focusing more on the declaration collisions, which is all said and good.

@clavecoder, i don't fully see the rationale you point to. Interfaces aren't valid ecmascript either, so why shed convention?

these remarks are (of course) stated in a cordial tone. however, this decision feels very counterintuitive to me

[mhegazy]

Allowing export default + [interface / abstract class / enum / namespace / type ] is tracked by #3792

[cdaringe]

oh i see! thanks. i'll follow on over there.