can you read double?

[hyansuper]

https://github.com/HEADS-project/arduino_msgpack/blob/master/msgpck.cpp#L327~L331 currently you just treat 8-bytes float as error and discard it.
can you read double the same way you read float, by defining a 8-bytes union?

union double_to_byte {
      double;
      byte b[8];
    } b2d;

also, these 4 lines looks like typo https://github.com/HEADS-project/arduino_msgpack/blob/master/msgpck.cpp#L321~L324, should they be

b &= ...