Alex Tkachman
53 lines
1.2 KiB
Plaintext
53 lines
1.2 KiB
Plaintext
trait ISized {
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val size : Int
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}
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trait ReadOnlyArray<out T> : ISized, java.lang.Iterable<T> {
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fun get(index : Int) : T
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class MyIterator() : java.util.Iterator<T> {
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private var index = 0
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override fun hasNext() : Boolean = index < size
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override fun next() : T = get(index++)
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override fun remove () : Unit {}
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}
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override fun iterator() : java.util.Iterator<T> = MyIterator()
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}
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trait WriteOnlyArray<in T> : ISized {
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fun set(index : Int, value : T) : Unit
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fun set(from: Int, count: Int, value: T) {
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for(i in 0..(count-1)) {
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set(i, value)
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}
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}
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}
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class MutableArray<T>(length: Int) : ReadOnlyArray<T>, WriteOnlyArray<T> {
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private val array = Array<T>(length)
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override fun get(index : Int) : T = array[index]
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override fun set(index : Int, value : T) : Unit { array[index] = value }
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override val size : Int
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get() = array.size
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}
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fun box() : String {
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var a = MutableArray<Int> (4)
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a [0] = 10
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a.set(1, 2, 13)
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a [3] = 40
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System.out?.println(a.iterator())
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System.out?.println(a.iterator().hasNext())
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// if(a.iterator() !is Iterator<Int>) return "fail";
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// for(el in a) {
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// System.out?.println(el)
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// }
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return "OK"
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} |