fun foo() {
  when (e) {
  }
  when (e) {
    is  -> foo
    !is  -> foo
    in  -> foo
    !in  -> foo
    -> foo
    else
  }
  when (e) {
    is  ->
    !is  ->
    in  ->
    !in  ->
    !in  -> ;
    ->
    else
    else ->
  }
  when (e) {
    - -> foo
  }
}