<?php

declare (strict_types=1);
namespace SlimStat\Dependencies\BrowscapPHP\Parser\Helper;

use Generator;
/**
 * interface for the parser patternHelper
 */
interface GetPatternInterface
{
    /**
     * Gets some possible patterns that have to be matched against the user agent. With the given
     * user agent string, we can optimize the search for potential patterns:
     * - We check the first characters of the user agent (or better: a hash, generated from it)
     * - We compare the length of the pattern with the length of the user agent
     *   (the pattern cannot be longer than the user agent!)
     *
     * @return Generator|string[]
     *
     * @throws void
     *
     * @no-named-arguments
     */
    public function getPatterns(string $userAgent): Generator;
}