Mikhail Glukhikh
53 lines
1.4 KiB
Kotlin
Vendored
53 lines
1.4 KiB
Kotlin
Vendored
class StrList : List<String?> {
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override val size: Int
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get() = throw UnsupportedOperationException()
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override fun isEmpty(): Boolean {
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throw UnsupportedOperationException()
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}
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override fun contains(o: String?) = o == null || o == "abc"
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override fun iterator(): Iterator<String> {
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throw UnsupportedOperationException()
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}
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override fun containsAll(c: Collection<String?>) = false
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override fun get(index: Int): String {
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throw UnsupportedOperationException()
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}
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override fun indexOf(o: String?): Int {
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throw UnsupportedOperationException()
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}
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override fun lastIndexOf(o: String?): Int {
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throw UnsupportedOperationException()
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}
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override fun listIterator(): ListIterator<String?> {
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throw UnsupportedOperationException()
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}
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override fun listIterator(index: Int): ListIterator<String?> {
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throw UnsupportedOperationException()
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}
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override fun subList(fromIndex: Int, toIndex: Int): List<String?> {
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throw UnsupportedOperationException()
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}
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}
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fun <E> Collection<E>.forceContains(x: Any?): Boolean = contains(x as E)
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fun box(): String {
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val strList = StrList()
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if (strList.forceContains(1)) return "fail 1"
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if (!strList.forceContains(null)) return "fail 2"
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if (strList.forceContains("cde")) return "fail 3"
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if (!strList.forceContains("abc")) return "fail 4"
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return "OK"
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}
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