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

   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


   For   an   explanation   of   the  terms  used  in  this  section,  see

   Interface   Attribute      Value          
   iswalnum()  Thread safety  MT-Safe locale 


   POSIX.1-2001, POSIX.1-2008, C99.


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


   isalnum(3), iswctype(3)


   This  page  is  part of release 4.09 of the Linux man-pages project.  A
   description of the project, information about reporting bugs,  and  the
   latest     version     of     this    page,    can    be    found    at

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