C++, Rust limitation: Fixed Size List code can't handle non-POD elements

[cpetig]

Non-POD/Copy elements require a transmute to/from [MaybeUninit<T>, N] and plenty of unsafe code to fill or extract the array element-wise.

In C++ you can use a union and placement new for creating the array.

[flelchuk]

Union with raw storage and placement-new is likely UB. But there are workarounds in C++.
Here's one - not too ugly - example on Compiler Explorer.