I don't understand the motivation about lifetimes in sync rust not being able to be arbitrary. I'm also confused because most of the time went you want to send data around in a async context you wrap it in `arc`, which has the pretty much analogous `rc` in a sync context which would also solve the lifetimes issue. Is there something I am missing?
class T {
public:
T(int & m): member{m} {}
int & member;
}
T MakeT(int m) {
return T(m);
}
int main() {
const auto t = MakeT(10);
std::cout << t.member << std::endl; // UB <- member has actually been destroyed
}