I have the task of adding members to a C ++ class that uses
boost::serialization::access
Objects are stored in text files and read.
However, I need to be backward compatible, and the new bool member needs to be serialized.
I need to allow the new code to read old files and write only the new format.
In particular, serialized files are missing a new data item. This throws an exception when reading.
How can I do this? / What suggestions / mechanisms allow this to be done?
I would suggest that there is a pattern or a known way to handle this, and I'm not sure what it could be.
(Of course, people writing the promotion code understood that the code / objects would change, and the old files should be processed with the new code / object)
source
share