protected function getCatchablePatterns()
    {
        return [
-           '[a-z_][a-z0-9_]*\:[a-z_][a-z0-9_]*(?:\\\[a-z_][a-z0-9_]*)*', // aliased name
-           '[a-z_\\\][a-z0-9_]*(?:\\\[a-z_][a-z0-9_]*)*', // identifier or qualified name
-           '(?:[0-9]+(?:[\.][0-9]+)*)(?:e[+-]?[0-9]+)?', // numbers
-           "'(?:[^']|'')*'", // quoted strings
-           '\?[0-9]*|:[a-z_][a-z0-9_]*', // parameters
+           'aliasedName' => '[a-z_][a-z0-9_]*\:[a-z_][a-z0-9_]*(?:\\\[a-z_][a-z0-9_]*)*', // aliased name
+           'idOrQualifiedName' => '[a-z_\\\][a-z0-9_]*(?:\\\[a-z_][a-z0-9_]*)*', // identifier or qualified name
+           'numbers' => '(?:[0-9]+(?:[\.][0-9]+)*)(?:e[+-]?[0-9]+)?', // numbers
+           'quotedString' => "'(?:[^']|'')*'", // quoted strings
+           'parameters' => '\?[0-9]*|:[a-z_][a-z0-9_]*', // parameters
        ];
    }

    protected function getType(&$value, $patternIndex)
    {
        $type = self::T_NONE;

        switch (true) {
            // Recognize numeric values
-           case (is_numeric($value)):
+           case ('numbers' === $patternIndex):
                if (strpos($value, '.') !== false || stripos($value, 'e') !== false) {
                    return self::T_FLOAT;
                }

                return self::T_INTEGER;

            // Recognize quoted strings
-           case ($value[0] === "'"):
+           case ('quotedString' === $patternIndex):
                $value = str_replace("''", "'", substr($value, 1, strlen($value) - 2));

                return self::T_STRING;

            // Recognize identifiers, aliased or qualified names
-           case (ctype_alpha($value[0]) || $value[0] === '_' || $value[0] === '\\'):
+           case ('idOrQualifiedName' === $patternIndex || 'aliasedName' === $patternIndex):
                $name = 'Doctrine\ORM\Query\Lexer::T_' . strtoupper($value);

                if (defined($name)) {
                    $type = constant($name);

                    if ($type > 100) {
                        return $type;
                    }
                }

                if (strpos($value, ':') !== false) {
                    return self::T_ALIASED_NAME;
                }

                if (strpos($value, '\\') !== false) {
                    return self::T_FULLY_QUALIFIED_NAME;
                }

                return self::T_IDENTIFIER;

            // Recognize input parameters
-           case ($value[0] === '?' || $value[0] === ':'):
+           case ('parameters' === $patternIndex):
                return self::T_INPUT_PARAMETER;

            // Recognize symbols
            case ($value === '.'):
                return self::T_DOT;
            case ($value === ','):
                return self::T_COMMA;
            case ($value === '('):
                return self::T_OPEN_PARENTHESIS;
            case ($value === ')'):
                return self::T_CLOSE_PARENTHESIS;
            case ($value === '='):
                return self::T_EQUALS;
            case ($value === '>'):
                return self::T_GREATER_THAN;
            case ($value === '<'):
                return self::T_LOWER_THAN;
            case ($value === '+'):
                return self::T_PLUS;
            case ($value === '-'):
                return self::T_MINUS;
            case ($value === '*'):
                return self::T_MULTIPLY;
            case ($value === '/'):
                return self::T_DIVIDE;
            case ($value === '!'):
                return self::T_NEGATE;
            case ($value === '{'):
                return self::T_OPEN_CURLY_BRACE;
            case ($value === '}'):
                return self::T_CLOSE_CURLY_BRACE;

            // Default
            default:
                // Do nothing
        }

        return $type;
    }