44 lines
1019 B
Kotlin
44 lines
1019 B
Kotlin
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package com.mikebull94.result
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/**
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* - Rust: [Result.iter](https://doc.rust-lang.org/std/result/enum.Result.html#method.iter)
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*/
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fun <V, E> Result<V, E>.iterator(): Iterator<V> {
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return ResultIterator(this)
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}
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/**
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* Rust: [Result.iter_mut](https://doc.rust-lang.org/std/result/enum.Result.html#method.iter_mut)
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*/
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fun <V, E> Result<V, E>.mutableIterator(): MutableIterator<V> {
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return ResultIterator(this)
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}
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private class ResultIterator<out V, out E>(private val result: Result<V, E>) : MutableIterator<V> {
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private var yielded = false
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override fun hasNext(): Boolean {
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if (yielded) {
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return false
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}
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return when (result) {
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is Ok -> true
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is Error -> false
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}
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}
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override fun next(): V {
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if (!yielded && result is Ok) {
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yielded = true
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return result.value
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} else {
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throw NoSuchElementException()
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}
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}
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override fun remove() {
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yielded = true
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}
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}
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