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NAME

       iswalpha - test for alphabetic wide character

SYNOPSIS

       #include <wctype.h>

       int iswalpha (wint_t wc);

DESCRIPTION

       The  iswalpha  function is the wide-character equivalent of the isalpha
       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
       character class "alpha" is  disjoint  from  the  wide  character  class
       "cntrl".

       Being  a  subclass  of  the  wide  character  class  "graph",  the wide
       character 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
       character 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  non-zero  if  wc  is  a  wide  character
       belonging  to  the  wide  character class "alpha". Otherwise it returns
       zero.

CONFORMING TO

       ISO/ANSI C, UNIX98

SEE ALSO

       isalpha(3), iswctype(3)

NOTES

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