Visual Studio C++ 2015 std::codecvt with char16_t or char32_t

Question

This code compiled OK under VS2013:

std::string Unicode::utf16_to_utf8(std::u16string utf16_string)
{
    std::wstring_convert

        

Answer 1

This worked for me in VS2017:

std::wstring utf8_to_utf16(std::string utf8_string)
{
   return std::wstring_convert, wchar_t>{}.from_bytes(utf8_string);
}

std::string utf16_to_utf8(std::wstring utf16_string)
{
    return std::wstring_convert, wchar_t>{}.to_bytes(utf16_string);
}