May Contain Code

Let's just jump right in. Local variables are destructed in reverse order of construction. Every beginner learns this. Wrap lines #include <cstdio> struct LifetimePrinter { int id; LifetimePrinter( int const id_) noexcept : id{id_} { std::printf( "[%i] int construct\n" , id); } LifetimePrinter(LifetimePrinter const & f) noexcept : id{f.id} { std::printf( "[%i] copy construct\n" , id); } LifetimePrinter(LifetimePrinter&& f) noexcept : id{f.id} { std::printf( "[%i] move construct\n" , id); if (f.id > 0) { //mark `f` as moved from f.id = -f.id; } } LifetimePrinter& operator= (LifetimePrinter const & f) noexcept { std::printf( "[%i] copy assign from %i\n" , id, f.id); id = f.id; return * this ; } LifetimePrinter& operator= (LifetimePrinter&& f) noexcept { ...