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import { isSafeInteger } from "./utils.ts";
/** @internal */export class Queue<T> {  #queue: T[] = [];
  constructor(readonly capacity: number) {    if (!isSafeInteger(capacity)) {      throw new RangeError("queue capacity must be a safe integer");    }  }
  enqueue(val: T) {    if (this.isFull) throw new RangeError("queue is full");    this.#queue.push(val);  }
  dequeue(): T {    if (this.isEmpty) throw new RangeError("queue is empty");    return this.#queue.shift() as T;  }
  get isFull(): boolean {    if (this.capacity < 0) return false;    return this.#queue.length === this.capacity;  }
  get isEmpty(): boolean {    return this.#queue.length === 0;  }}