@the_drow I think we're referring to two different things. I saw your answers about the string concatenation, the stringstream approach seems odd but I trust you that it's better 🙂 But my link there was about the

for (auto path : paths)

vs

for (const auto& path : paths)

I didn't see any

std::move

of the new

path

when using the non-const-reference approach. Sorry if I had missed or forgotten some previous discussion, I have a bad memory.