| //NB: special ieee754 arithmetic logic is not applied to Int comparison | |
| fun myEquals(a: Int?, b: Int?) = a == b | |
| fun myEquals1(a: Int?, b: Int) = a == b | |
| fun myEquals2(a: Int, b: Int?) = a == b | |
| fun myEquals0(a: Int, b: Int) = a == b | |
| fun box(): String { | |
| if (!myEquals(null, null)) return "fail 1" | |
| if (myEquals(null, 0)) return "fail 2" | |
| if (myEquals(0, null)) return "fail 3" | |
| if (!myEquals(0, 0)) return "fail 4" | |
| if (myEquals1(null, 0)) return "fail 5" | |
| if (!myEquals1(0, 0)) return "fail 6" | |
| if (myEquals2(0, null)) return "fail 7" | |
| if (!myEquals2(0, 0)) return "fail 8" | |
| if (!myEquals0(0, 0)) return "fail 9" | |
| return "OK" | |
| } |