C++ issue with conversion of std::string to std::wstring - Windows vs Linux

Question

I'm trying to convert the string "pokémon" from std::string to std::wstring using

std::wstring wsTmp(str.begin(), str.end());

This works on Windows, but on Linux it returns "pok\xffffffc3\xffffffa9mon"

How can I make it work on Linux?

Answer 1

This worked for me on POSIX.

#include <codecvt>
#include <string>
#include <locale>

int main() {
    
    std::string a = "pokémon";
    std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> cv;
    std::wstring wide = cv.from_bytes(a);
    
    return 0;
}

The wstring holds the correct string at the end.

Important note by @NathanOliver: std::codecvt_utf8_utf16 was deprecated in C++17 and may be removed from the standard in a future version.