Serialization for Rcpp exposed class

问题

I've written a C++ class in an R package that I expose to the R namespace with RCPP_EXPOSED_CLASS and RCPP_MODULE.

Everything works great:

> index
An object of class "Index"
Slot "index":
C++ object <0x9cd4810> of class 'DB' <0xfd66220>

but if saveRDS(index, 'DB.rds') it does not save the actual object just the address. In turn it is casted as invalid when I load the DB.rds in a new session.

Is it possible to write a custom serialization method that could work transparently with saveRDS ?

来源：https://stackoverflow.com/questions/50582388/serialization-for-rcpp-exposed-class