XOOPS / XoopsCore25

            while ($i < $len) {

                switch ($mapping[$i]) {

                    case '[':

                        // nested sequence

                        $value = self::parseSequence($mapping, $i, $references);

                        // Spec: Keys MUST be unique; first one wins.

                        // Parser cannot abort this mapping earlier, since lines

                        // are processed sequentially.

                        // But overwriting is allowed when a merge node is used in current block.

                        if ('<<' === $key) {

                            foreach ($value as $parsedValue) {

                                $output += $parsedValue;

                            }

                        } elseif ($allowOverwrite || !isset($output[$key])) {

                            $output[$key] = $value;

                        }

                        $done = true;

                        break;

                    case '{':

                        // nested mapping

                        $value = self::parseMapping($mapping, $i, $references);

                        }

                        $done = true;

                        break;

                    case '{':

                        // nested mapping

                        $value = self::parseMapping($mapping, $i, $references);

                        // Spec: Keys MUST be unique; first one wins.

                        // Parser cannot abort this mapping earlier, since lines

                        // are processed sequentially.

                        // But overwriting is allowed when a merge node is used in current block.

                        if ('<<' === $key) {

                            $output += $value;

                        } elseif ($allowOverwrite || !isset($output[$key])) {

                            $output[$key] = $value;

                        }

                        $done = true;

                        break;

                    case ':':

                    case ' ':

                        break;