utilities.SelfRepresentingSingletonSet.kt Maven / Gradle / Ivy

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Dokka is an API documentation engine for Kotlin and Java, performing the same function as Javadoc for Java

There is a newer version: 2.0.0

package org.jetbrains.dokka.utilities

interface SelfRepresentingSingletonSet> : Set {
    override val size: Int get() = 1

    override fun contains(element: T): Boolean = this == element

    override fun containsAll(elements: Collection): Boolean =
        if (elements.isEmpty()) true
        else elements.all { this == it }

    override fun isEmpty(): Boolean = false

    override fun iterator(): Iterator = iterator {
        @Suppress("UNCHECKED_CAST")
        yield(this@SelfRepresentingSingletonSet as T)
    }
}