the ok() and error() methods return an std::optional<std::reference_wrapper<>>. The reference wrapper is basically a pointer that can be used like a reference. This means there is already a way to encode a not valid-state.
This is basically the idea of a packed optional.
We should try this and check if this would really help.
the
ok()anderror()methods return anstd::optional<std::reference_wrapper<>>. The reference wrapper is basically a pointer that can be used like a reference. This means there is already a way to encode anot valid-state.This is basically the idea of a packed optional.
We should try this and check if this would really help.