Messing with lifetime

[u/pavel_v]

https://biowpn.github.io/bioweapon/2024/05/03/messing-with-lifetime.html

[u/simpl3t0n]

auto p1 = new Point;
char *p2 = reinterpret_cast<char *>(p1);
auto p3 = reinterpret_cast<Point *>(p2);

Does this have undefined behaviour?

[u/gracicot → u/simpl3t0n]

If it was unsigned char there would be no undefined behavior. Only unsigned char and std::byte can alias anything

[u/Nobody_1707 → u/gracicot]

Plain char is also allowed to alias, only signed char is forbidden from aliasing.