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    Command:

    iswalpha

    
    
    

    SYNOPSIS

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

    DESCRIPTION

           The  iswalpha()  function is the wide-character equivalent of the isal-
           pha(3) function.  It tests whether wc is a wide character belonging  to
           the wide-character class "alpha".
    
           The  wide-character  class  "alpha" is a subclass of the wide-character
           class "alnum", and therefore also  a  subclass  of  the  wide-character
           class "graph" and of the wide-character class "print".
    
           Being  a subclass of the wide-character class "print", the wide-charac-
           ter class "alpha" is disjoint from the wide-character class "cntrl".
    
           Being a subclass of the wide-character class "graph", the  wide-charac-
           ter class "alpha" is disjoint from the wide-character class "space" and
           its subclass "blank".
    
           Being a subclass of the wide-character class "alnum", the  wide-charac-
           ter class "alpha" is disjoint from the wide-character class "punct".
    
           The  wide-character  class  "alpha" is disjoint from the wide-character
           class "digit".
    
           The wide-character class "alpha" contains  the  wide-character  classes
           "upper" and "lower".
    
           The  wide-character  class "alpha" always contains at least the letters
           'A' to 'Z' and 'a' to 'z'.
    
    
    

    RETURN VALUE

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

    ATTRIBUTES

       Multithreading (see pthreads(7))
           The iswalpha() 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 iswalpha() depends on the LC_CTYPE category of the cur-
           rent locale.
    
    
    

    SEE ALSO

    
    
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