return-value

#!/usr/bin/env php
<?php

/**
 * This example shows how coroutines can return values to the caller.
 */

declare(strict_types = 1);

require __DIR__ . '/../vendor/autoload.php';

use Recoil\ReferenceKernel\ReferenceKernel;

function multiply($a, $b)
{
    yield; // force PHP to parse this function as a generator
    return $a * $b;
    echo 'This code is never reached.';
}

ReferenceKernel::start(function () {
    $result = yield multiply(2, 3);
    echo '2 * 3 is ' . $result . PHP_EOL;
});