<?php

/*
 * This file is part of Respect/Validation.
 *
 * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net>
 *
 * For the full copyright and license information, please view the "LICENSE.md"
 * file that was distributed with this source code.
 */

namespace Respect\Validation\Rules;

class Vowel extends AbstractRegexRule
{
    protected function getPregFormat()
    {
        return '/^(\s|[aeiouAEIOU])*$/';
    }
}