iswalnum - test for alphanumeric wide character

       For an explanation of the terms used in this section, see attributes(7).
       ┌──────────────────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │ Interface                                                            │ Attribute     │ Value          │
       ├──────────────────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │ iswalnum()                                                           │ Thread safety │ MT-Safe locale │
       └──────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘

       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'.

       POSIX.1-2001, C99.

       Standard C library (libc, -lc)

       iswalnum - test for alphanumeric wide character

       The behavior of iswalnum() depends on the LC_CTYPE category of the current locale.

       The iswalnum() function returns nonzero if wc is a wide character belonging to the  wide-character  class
       "alnum".  Otherwise, it returns zero.

isalnum(3), iswctype(3)

Linux man-pages 6.9.1                              2024-05-02                                        iswalnum(3)

       C11, POSIX.1-2008.

#include<wctype.h>intiswalnum(wint_twc);