wstring和string之间的转换

inline std::string ws2s(const std::wstring& wstr)
{
	using convert_typeX = std::codecvt_utf8<wchar_t>;
	std::wstring_convert<convert_typeX, wchar_t> converterX;

	return converterX.to_bytes(wstr);
}

inline std::wstring s2ws(const std::string& str)
{
	using convert_typeX = std::codecvt_utf8<wchar_t>;
	std::wstring_convert<convert_typeX, wchar_t> converterX;

	return converterX.from_bytes(str);
}