Mikhail Glukhikh
37 lines
712 B
Kotlin
Vendored
37 lines
712 B
Kotlin
Vendored
import java.util.Enumeration
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fun <T> java.util.Enumeration<T>.iterator() = object: Iterator<T> {
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override fun hasNext(): Boolean = hasMoreElements()
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override fun next() = nextElement()
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}
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interface MyIterator<T> {
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operator fun hasNext() : Boolean
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operator fun next() : T
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}
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operator fun <T : Any> T?.iterator() = object : MyIterator<T> {
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var hasNext = this@iterator != null
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private set
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override fun hasNext() = hasNext
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override fun next() : T {
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if (hasNext) {
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hasNext = false
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return this@iterator!!
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}
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throw java.util.NoSuchElementException()
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}
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}
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fun main() {
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val i : Int? = 1
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for (x in i) {
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System.out.println(x)
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}
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}
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