<?php

namespace PhpOption;

use EmptyIterator;

/**
 * @extends Option<mixed>
 */
final class None extends Option
{
    /** @var None|null */
    private static $instance;

    /**
     * @return None
     */
    public static function create(): self
    {
        if (null === self::$instance) {
            self::$instance = new self();
        }

        return self::$instance;
    }

    public function get()
    {
        throw new \RuntimeException('None has no value.');
    }

    public function getOrCall($callable)
    {
        return $callable();
    }

    public function getOrElse($default)
    {
        return $default;
    }

    public function getOrThrow(\Exception $ex)
    {
        throw $ex;
    }

    public function isEmpty(): bool
    {
        return true;
    }

    public function isDefined(): bool
    {
        return false;
    }

    public function orElse(Option $else)
    {
        return $else;
    }

    public function ifDefined($callable)
    {
        // Just do nothing in that case.
    }

    public function forAll($callable)
    {
        return $this;
    }

    public function map($callable)
    {
        return $this;
    }

    public function flatMap($callable)
    {
        return $this;
    }

    public function filter($callable)
    {
        return $this;
    }

    public function filterNot($callable)
    {
        return $this;
    }

    public function select($value)
    {
        return $this;
    }

    public function reject($value)
    {
        return $this;
    }

    public function getIterator(): EmptyIterator
    {
        return new EmptyIterator();
    }

    public function foldLeft($initialValue, $callable)
    {
        return $initialValue;
    }

    public function foldRight($initialValue, $callable)
    {
        return $initialValue;
    }

    private function __construct()
    {
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NTE3MTE4MjY3Nzg3ODYwNSA0NTAwMjM1ODUyODI0MTA0IDU2MTQ4MTUyNDI3NDYzOTg=