Re: for each member of a sturcture/class ?

"Jim Langston" <>
Tue, 18 Dec 2007 12:07:45 CST
"Jim Langston" wrote:

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.

Looking at both boost::fustion and boost serialization they are doing the
exact thing I don't want to do, list each member of the structure twice.
Once in the class declaration, once in some other function/method. That I
can already do in my code which is what I'm trying to prevent.

C++ does nto currently have a way to do it, it's not part of the language.

Jim Langston

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