<?php

declare(strict_types=1);

namespace Set011;

use Generator;

class Greeter
{
    private $words;

    /**
     * @param string[] $words
     */
    public function __construct(array $words)
    {
        $this->words = $words;
    }

    /**
     * @return Generator|string
     */
    public function greet()
    {
        foreach ($this->words as $word) {
            yield $word.' world!';
        }
    }
}