| private object NotEmptyMap : MutableMap<Any, Any> { | |
| override fun containsKey(key: Any): Boolean = true | |
| override fun containsValue(value: Any): Boolean = true | |
| override fun get(key: Any): Any? = Any() | |
| override fun remove(key: Any): Any? = Any() | |
| override val size: Int get() = 0 | |
| override fun isEmpty(): Boolean = true | |
| override fun put(key: Any, value: Any): Any? = throw UnsupportedOperationException() | |
| override fun putAll(from: Map<out Any, Any>): Unit = throw UnsupportedOperationException() | |
| override fun clear(): Unit = throw UnsupportedOperationException() | |
| override val entries: MutableSet<MutableMap.MutableEntry<Any, Any>> get() = null!! | |
| override val keys: MutableSet<Any> get() = null!! | |
| override val values: MutableCollection<Any> get() = null!! | |
| } | |
| fun box(): String { | |
| val n = NotEmptyMap as MutableMap<Any?, Any?> | |
| if (n.get(null) != null) return "fail 1" | |
| if (n.containsKey(null)) return "fail 2" | |
| if (n.containsValue(null)) return "fail 3" | |
| if (n.remove(null) != null) return "fail 4" | |
| if (n.get("") == null) return "fail 5" | |
| if (!n.containsKey("")) return "fail 6" | |
| if (!n.containsValue("")) return "fail 7" | |
| if (n.remove("") == null) return "fail 8" | |
| return "OK" | |
| } |