update packages

1 files changed, 46 insertions, 42 deletions

diff --git a/node_modules/webpack/lib/util/Queue.js b/node_modules/webpack/lib/util/Queue.js
index ef3ffdc80..6615e9f77 100644
--- a/node_modules/webpack/lib/util/Queue.js
+++ b/node_modules/webpack/lib/util/Queue.js
@@ -1,42 +1,46 @@
-"use strict";

-

-module.exports = class Queue {

-	constructor(items) {

-		this.first = null;

-		this.last = null;

-		this.length = 0;

-		if(items) {

-			for(const item of items) {

-				this.enqueue(item);

-			}

-		}

-	}

-

-	enqueue(item) {

-		const first = this.first;

-		const node = {

-			item,

-			next: null

-		};

-		if(first === null) {

-			this.last = node;

-		} else {

-			first.next = node;

-		}

-		this.first = node;

-		this.length++;

-	}

-

-	dequeue() {

-		const last = this.last;

-		if(last === null)

-			return undefined;

-		const next = last.next;

-		if(next === null) {

-			this.first = null;

-		}

-		this.last = next;

-		this.length--;

-		return last.item;

-	}

-};

+"use strict";
+
+/**
+ * @template T
+ */
+class Queue {
+	/**
+	 * @param {Iterable<T>=} items The initial elements.
+	 */
+	constructor(items) {
+		/** @private @type {Set<T>} */
+		this.set = new Set(items);
+		/** @private @type {Iterator<T>} */
+		this.iterator = this.set[Symbol.iterator]();
+	}
+
+	/**
+	 * Returns the number of elements in this queue.
+	 * @returns {number} The number of elements in this queue.
+	 */
+	get length() {
+		return this.set.size;
+	}
+
+	/**
+	 * Appends the specified element to this queue.
+	 * @param {T} item The element to add.
+	 * @returns {void}
+	 */
+	enqueue(item) {
+		this.set.add(item);
+	}
+
+	/**
+	 * Retrieves and removes the head of this queue.
+	 * @returns {T | undefined} The head of the queue of `undefined` if this queue is empty.
+	 */
+	dequeue() {
+		const result = this.iterator.next();
+		if (result.done) return undefined;
+		this.set.delete(result.value);
+		return result.value;
+	}
+}
+
+module.exports = Queue;