Using sscanf_s for converting string_view to int.cpp

int to_int(string_view sv)
{
   char formatter[24] = {};
   sprintf(formatter, "%%%zud%%n", sv.size());
   int num, n{0};
   if (sscanf_s(sv.data(), formatter, &num, &n)==1 && n==sv.size()) // could emit a warning because sv.size() is unsigned
     return num;
   else // (some) error handling
}