@:arrayAccess is unable to resolve unimported enum constructor name

E.hx (separate file)
```haxe
enum E {
A;
B;
}
```

Main.hx
```haxe
abstract Abs(Dynamic) {
@:arrayAccess public function get(key:E):Int return 1;
}

class Main {
static var p:Abs;
static function main() {
$type(p.get(A)); // OK
$type(p[A]); // ERROR: Unknown identifier : A
}
}
```