How to implement safe copy constructor for class that has internal placement new (with std::string)?

I'm not sure that what you're doing is at all a good design, but to answer your question about placement-new: You provide the constructor arguments just like in any other new expression.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.