14 lines
471 B
Kotlin
14 lines
471 B
Kotlin
package com.smallhacker.util
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// The Kotlin standard library does not contain a counterpart to Java's ArrayDeque<E>, so let's implement a simplistic
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// one ourselves for portability.
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interface ItemQueue<E> : MutableCollection<E> {
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fun removeNext(): E
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}
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class LifoQueue<E> private constructor(private val list: MutableList<E>) : ItemQueue<E>, MutableCollection<E> by list {
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constructor() : this(ArrayList())
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override fun removeNext(): E = list.removeAt(0)
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} |