[@bs] at application side treats f () as 0-arity application #674
Description
Consider this gist:
let sleep ms =
Js.Promise.make @@ fun ~resolve ~reject:_ ->
ignore (Js.Global.setInterval (fun () -> (resolve () [@bs])) ms)
which errors with
Line 3, 44: Error This expression has type ('a -> unit)
Js__Js_internal.Fn.arity1 but an expression was expected of type 'b
Js__Js_internal.Fn.arity0
The issue is that Melange treats f ()[@bs] syntax as 0-arity application.
If we do
let unit = () in f unit [@bs]
then it compiles.
I think 0-arity applications should have another syntax.