YamlInline::parseMapping PHP Method

    protected static function parseMapping($mapping, &$i = 0)
    {
        $output = array();
        $len = strlen($mapping);
        $i += 1;
        // {foo: bar, bar:foo, ...}
        while ($i < $len) {
            switch ($mapping[$i]) {
                case ' ':
                case ',':
                    ++$i;
                    continue 2;
                case '}':
                    return $output;
            }
            // key
            $key = self::parseScalar($mapping, array(':', ' '), array('"', "'"), $i, false);
            // value
            $done = false;
            while ($i < $len) {
                switch ($mapping[$i]) {
                    case '[':
                        // nested sequence
                        $output[$key] = self::parseSequence($mapping, $i);
                        $done = true;
                        break;
                    case '{':
                        // nested mapping
                        $output[$key] = self::parseMapping($mapping, $i);
                        $done = true;
                        break;
                    case ':':
                    case ' ':
                        break;
                    default:
                        $output[$key] = self::parseScalar($mapping, array(',', '}'), array('"', "'"), $i);
                        $done = true;
                        --$i;
                }
                ++$i;
                if ($done) {
                    continue 2;
                }
            }
        }
        throw new InvalidArgumentException(sprintf('Malformed inline YAML string %s', $mapping));
    }