No, you cannot do this. Strings are exported as plain C / C++ character vectors, and plain C / C++ character vectors are 8 bit characters. There is no way in C / C++ to mark strings as being UTF-8. The closest you can come with constant char vectors is to have a sequence of bytes that happens to encode UTF-8
Unfortunately std::wstring uses 16 bit code points on Windows. For portability you need to use std:u32string
