Re: for each member of a sturcture/class ?

One thing that would help me a lot in code would be something that
allowed me to iterate through the members of a class or structure.
Consider serialization.

To serialize a class or structure I need to serialze each type (not
hard) then in the class serialize each variable. For a simple
structure, such as holding integers and std::strings, if there was
some way to iterate through the variables it would be simple
something like in pseudo code:
std::ostream& operator<<( std::ostream& os)
{
  for_each_member( os << member );
}

There is also a case where I want to tie a structure/class into a
database and need to go through each variable and call a function to
tie it in, a simple thing if there was a way to call something for
each variable.
I can't even think how to try to do this in C++ currently.