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NAME

       iswalnum - test for alphanumeric wide character

SYNOPSIS

       #include <wctype.h>

       int iswalnum (wint_t wc);

DESCRIPTION

       The  iswalnum  function is the wide-character equivalent of the isalnum
       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’.

RETURN VALUE

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

CONFORMING TO

       ISO/ANSI C, UNIX98

SEE ALSO

       isalnum(3), iswctype(3)

NOTES

       The  behaviour  of  iswalnum  depends  on  the LC_CTYPE category of the
       current locale.