Re: [Boost-users] [serialization] char[] and double

From: Robert Ramey (ramey_at_[hidden])
Date: 2006-11-25 00:50:27

> #include <boost/archive/text_iarchive.hpp>
> #include <boost/archive/text_oarchive.hpp>
>
> #include "cmdef.h"
>
> namespace boost {
> namespace serialization {
>
> template<class Archive>
> void serialize(Archive & ar, struct NODE_MGR & st,
>  const unsigned int version)
> {
>   ar & st.ApplName;  // line 19 in err msg
>   ar & st.CompName;  // line 20 in err msg
> }
>
> }  // end namespace serialization */
> }  // end of namespace boost */
>
> --------------------
>
> /* arch.cpp */
>
> #include <sstream>
>
> #include "arch.hpp"
>
> int main()
> {
>   const struct NODE_MGR nm; // this will fix errors in second case - see 
> rationale
>   std::ostringstream ofs;
>   boost::archive::text_oarchive oa(ofs);
>
>   oa << nm;  // line 15 in err msg
>
>   return 0;
> }

> Compiling arch.cpp produces these errors:
>
>   arch.hpp:19: error: cannot bind packed field
>     ‘st->NODE_MGR::ApplName’ to ‘char (&)[8]
>
>   arch.hpp:20: error: cannot bind packed field
>     ‘st->NODE_MGR::CompName’ to ‘char (&)[8]
>

> However, on the workstation side the structs MUST remain
> 'packed'; otherwise thousands of source files will have to
> be modified.

> Is there any way to make this work with boost archives,
> or should I explore other options?

I don't see how this could be addressed from within the serialization
library.  It looks like anthing that looks like

ostream os;
os << nm;

is going to fail as well.  I suspect that your strategy is going to be
foiled whether you use the serialization or some other method.

Robert Ramey