ncke

#  Copyright (c) 2023 AUTHORS
#
#  SPDX-License-Identifier: BSL-1.0
#  Distributed under the Boost Software License, Version 1.0. (See accompanying
#  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
from typing import Optional, Tuple
from threading import Thread
from queue import Queue
import numpy as np
import sys

ncke

//
//  WeakMultiMap.swift
//  Created by Nick on 19/02/2023.
//

import Combine
import Foundation

// MARK: - Weak Multi Map

ncke

import Foundation

/**
 Implements a thread-safe generic data structure that can behave as a
 stack or a queue.
 */
struct Xixo<Element> {

    enum Mode {
        /** Stack mode provides a lifo data structure. */