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    Command:

    iswalnum

    
    
    

    SYNOPSIS

           #include <wctype.h>
    
           int iswalnum(wint_t wc);
    
    
    

    DESCRIPTION

           The  iswalnum()  function is the wide-character equivalent of the isal-
           num(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-charac-
           ter class "alnum" is disjoint from the wide-character class "cntrl".
    
           Being a subclass of the wide-character class "graph", the  wide-charac-
           ter 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-char-
           acter 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 nonzero  if  wc  is  a  wide  character
           belonging  to  the  wide-character class "alnum".  Otherwise it returns
           zero.
    
    
    

    ATTRIBUTES

       Multithreading (see pthreads(7))
           The iswalnum() function is thread-safe  with  exceptions.   It  can  be
           safely  used  in multithreaded applications, as long as setlocale(3) is
           not called to change the locale during its execution.
    
    
    

    CONFORMING TO

           C99.
    
    
    

    NOTES

           The behavior of iswalnum() depends on the LC_CTYPE category of the cur-
           rent locale.
    
    
    

    SEE ALSO

           isalnum(3), iswctype(3)
    
    
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