iswalnum function — Determines whether a wide character is alphanumeric
int iswalnum(wint_t wc)
The iswalnum function returns true (nonzero) if either iswalpha(wc) or iswdigit(wc) is true.
iswalnum
iswalpha(wc)
iswdigit(wc)
iswalpha function, iswdigit function, isalnum in <cctype>
isalnum
<cctype>