alt Hacker NewsIf the type is an implicit-lifetime type, then you can legally create an unsigned char array, and then reinterpret_cast a pointer to that to a pointer to the type.
See https://eel.is/c++draft/intro.object#def:object,implicit_cre....
https://eel.is/c++draft/intro.object#15 is an example showing this with malloc; the subsequent paragraph further permits it to work with an unsigned char array.
1. You still need std::launder in that case.
2. It doesn't initialize the object that is implicitly created, even if the storage has initialized chars.