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Viewing / Editing File: RegexPatternDetector.php

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<?php

declare (strict_types=1);
namespace Rector\NodeNameResolver\Regex;

final class RegexPatternDetector
{
    /**
     * @var string[]
     *
     * This prevents miss matching like "aMethoda"
     */
    private const POSSIBLE_DELIMITERS = ['#', '~', '/'];
    /**
     * @var array<string, string>
     */
    private const START_AND_END_DELIMITERS = ['(' => ')', '{' => '}', '[' => ']', '<' => '>'];
    public function isRegexPattern(string $name) : bool
    {
        if (\strlen($name) <= 2) {
            return \false;
        }
        $firstChar = $name[0];
        $lastChar = $name[\strlen($name) - 1];
        if ($firstChar !== $lastChar) {
            foreach (self::START_AND_END_DELIMITERS as $start => $end) {
                if ($firstChar !== $start) {
                    continue;
                }
                if ($lastChar !== $end) {
                    continue;
                }
                return \true;
            }
            return \false;
        }
        return \in_array($firstChar, self::POSSIBLE_DELIMITERS, \true);
    }
}

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