iswalnum — test for alphanumeric wide character
#include <wctype.h>
int iswalnum( |
wint_t wc) ; |
The iswalnum
() function is
the wide-character equivalent of the isalnum(3) function. It
tests whether wc
is a
wide character belonging to the wide-character class
"alnum".
The wide-character class "alnum" is a subclass of the wide-character class "graph", and therefore also a subclass of the wide-character class "print".
Being a subclass of the wide-character class "print", the wide-character class "alnum" is disjoint from the wide-character class "cntrl".
Being a subclass of the wide-character class "graph", the wide-character class "alnum" is disjoint from the wide-character class "space" and its subclass "blank".
The wide-character class "alnum" is disjoint from the wide-character class "punct".
The wide-character class "alnum" is the union of the wide-character classes "alpha" and "digit". As such, it also contains the wide-character class "xdigit".
The wide-character class "alnum" always contains at least the letters 'A' to 'Z', 'a' to 'z' and the digits '0' to '9'.
The iswalnum
() function
returns nonzero if wc
is a wide character belonging to the wide-character class
"alnum". Otherwise it returns zero.