persistence class has:

• virtual persistID=NULL - returns unique ID (integer, class name, or type_info)
• virtual save_guts=NULL - {parent.save();y.save();save(int i);save(double d);}
• virtual restor_guts=NULL- {parent.restore();y.restore();restor(i);restore(d);}
• virtual persist *X::clone - {return new X(*this);}

Before calling X.save(), use add _type(&X);

For pointers, need a map of pointers and whether they have been saved.8

source psfile jl@crush.caltech.edu index persistence