Ilya Gorbunov
5d13b1681f
Increase visibility to internal for: - copyToArrayOfAny - UNINITIALIZED_VALUE - InitializedLazyImpl Change file classes to multifile: - LazyKt - GroupingKt - IntrinsicsKt (coroutines)
37 lines
1.3 KiB
Kotlin
37 lines
1.3 KiB
Kotlin
@file:kotlin.jvm.JvmMultifileClass
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@file:kotlin.jvm.JvmName("CollectionsKt")
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package kotlin.collections
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/**
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* Returns the given iterator itself. This allows to use an instance of iterator in a `for` loop.
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* @sample samples.collections.Iterators.iterator
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*/
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@kotlin.internal.InlineOnly
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public inline operator fun <T> Iterator<T>.iterator(): Iterator<T> = this
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/**
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* Returns an [Iterator] wrapping each value produced by this [Iterator] with the [IndexedValue],
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* containing value and it's index.
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* @sample samples.collections.Iterators.withIndexIterator
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*/
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public fun <T> Iterator<T>.withIndex(): Iterator<IndexedValue<T>> = IndexingIterator(this)
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/**
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* Performs the given [operation] on each element of this [Iterator].
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* @sample samples.collections.Iterators.forEachIterator
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*/
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public inline fun <T> Iterator<T>.forEach(operation: (T) -> Unit) : Unit {
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for (element in this) operation(element)
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}
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/**
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* Iterator transforming original `iterator` into iterator of [IndexedValue], counting index from zero.
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*/
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internal class IndexingIterator<out T>(private val iterator: Iterator<T>) : Iterator<IndexedValue<T>> {
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private var index = 0
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final override fun hasNext(): Boolean = iterator.hasNext()
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final override fun next(): IndexedValue<T> = IndexedValue(index++, iterator.next())
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}
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