[Boost-users] [Serialization] Can I load two object from one input file?

From: sjdf (sjdf.maillist_at_[hidden])
Date: 2007-12-27 02:20:24

Hi all,

Code like this:

// Save
std::ofstream ofs( "c.out" );

A testA1;
B testB1;

testA1.Save( ofs );
testB1.Save( ofs );

ofs.close();

// Load
std::ifstream ifs( "c.out" );

A testA11;
B testB11;

testA11.Load( ifs );
testB11.Load( ifs );

The testA1 and testB1 can save successful, and the testA11 can load
successful, but when loading testB11, it throw a exception
"invalid_signature". I have trace into the code, I found when the
testA11 loading, the "file_signature" is "serialization::archive", but
when testB11 loading, the "file_signature" is empty.

Why it like this? What should I do?

May be there is the same question before I ask, but I don't know what
keyword could be search, sorry.

Thanks!