Without further ado, the following was found: Issue: the B<iswctype>() → then the B<iswctype>() "If I<wc> is a wide character having the character property designated by " "I<desc> (or in other words: belongs to the character class designated by " "I<desc>), the B<iswctype>() function returns nonzero. Otherwise, it " "returns zero. If I<wc> is B<WEOF>, zero is returned."