flexible class operators

[Scipio]

Hey People,

I have a very simple class State containing a bunch of variables. Now I want to define State State::operator + (State) that simply returns a State object of which the values of the variables are the sum of the same variables, eg:

State State::operator + (State b)
{
  State result;
  result.x = x + b.x;
  result.vel = vel + b.vel;
  return result;
}

. Now I want this code to be ajustable for other problems, so that ideally I just have to add a variable in the class definition and the operator will automaticly include it in its operation. (Not just because I'm lazy, but also because I want others to be able to use the code without problems, so it should be as straight forward as possible). Can this be done?

[AbstractionAnon]

Now I want this code to be ajustable for other problems

Assuming your defintion of operator + continues to mean that each of the variables are added, then yes. e.g If you add a variable y to your class, then certainly you can add result.y = y + b.y; to your operator function.

[Scipio]

Thank you, but that's not what I'm looking for. The point is I want to operator to include all variables without me explicitly telling it to do so (ie. an operator that goes through all variables without naming them explicitly).

[AbstractionAnon]

Nope. You're not going to be able to do that.

You could use an array or vector to hold the variables, then it would be a simple matter to iterate through the array or vector performing the addition on each member.