Re: [Boost-users] Feature request for serialization

From: Peter Dimov (pdimov_at_[hidden])
Date: 2007-10-18 13:24:52

Bill Lear:

> I think something simpler would be to have a single callback,
> say progress(), and pass it the number of bytes read so far
> from the stream in question.  This would allow a percentage complete
> calculation to be done based on the number of bytes in the incoming
> file (assuming it is not compressed).  Thus, something like this:
>
> template<class Archive>
> void serialize(Archive & ar, E & e, const unsigned int version){
>    ar & e;
>    progress(ar.stream().tellg());
> }
>
> template<class Archive>
> void serialize(Archive & ar, B & b, const unsigned int version){
>    ar & b;
>    progress(ar.stream().tellg());
> }
>
> or whatever.

It's better to implement the progress callback at the streambuf level, the 
stream level, or the archive level (in decreasing order of betterness.)