/**
 * A representation of options that can be passed to the `Stack`
 * constructor.
 */
declare type StackConstructorOptions<D extends unknown = number> = Partial<{
    /**
     * An array that will be put in the form of a `Stack` and used as an
     * initial value of the instance.
     */
    array: Array<D>;
}>;
/**
 * A linear data structure that is build in a fashion that mostly exposes a
 * BigO notation of `O(1)`
 *
 * It follows the principle of LIFO (Last In First Out).
 *
 * @spacecomplexity `O(n)`
 */
declare class Stack<D extends unknown = number> {
    /**
     * The `LinkedList` that serves as a basis of all operations of the `Stack`.
     */
    private __linkedList;
    /**
     * @param options Options that affect the initialization process of the `Stack`.
     */
    constructor(options?: StackConstructorOptions<D>);
    /**
     * Returns the amout of elements found on the `Stack`.
     * @returns The length of the `Stack`
     */
    get length(): number;
    /**
     * Checks wether or not the `Stack` does not contain any elements. This
     * works based on the `LinkedList` implementation.
     *
     * @returns A boolean that indicates wether or not the `Stack` is empty
     */
    isEmpty(): boolean;
    /**
     * Fetches the element that currently sits on top of the `Stack`.
     *
     * @returns The data that the top most element holds
     */
    peek(): D | null;
    /**
     * Adds a new element with some data to the top of the `Stack`.
     *
     * @param data A piece of data that will be held by the element on the `Stack`
     * @returns The `Stack` instance
     */
    push(data: D): this;
    /**
     * Deletes the top most element of the `Stack`.
     *
     * @returns The data that the deleted element held, or nothing if the `Stack` was empty.
     */
    pop(): D | null;
    /**
     * Converts the `Stack` to an array. The indices are converted as to be
     * expected.
     *
     * @returns An array containing the elements of the `Stack`
     */
    toArray(): D[];
    /**
     * Prepends an array to the `Stack` instance.
     *
     * @param data An array of data that will be put on the `Stack`
     * @returns The `Stack` instance
     */
    fromArray(data: D[]): this;
    /**
     * Converts the `Stack` to string.
     *
     * @param callback A function that will handle the stringification
     * @returns A string containg the stringified data of the stack's elements.
     */
    toString(callback?: (data: D) => string): string;
}
export default Stack;