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    Command:

    iswupper

    
    
    

    SYNOPSIS

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

    DESCRIPTION

           The  iswupper()  function is the wide-character equivalent of the isup-
           per(3) function.  It tests whether wc is a wide character belonging  to
           the wide-character class "upper".
    
           The  wide-character  class  "upper" is a subclass of the wide-character
           class "alpha", and therefore also  a  subclass  of  the  wide-character
           class  "alnum",  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 "upper" is disjoint from the wide-character class "cntrl".
    
           Being  a subclass of the wide-character class "graph", the wide-charac-
           ter class "upper" 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 "upper" is disjoint from the wide-character class "punct".
    
           Being a subclass of the wide-character class "alpha", the  wide-charac-
           ter class "upper" is disjoint from the wide-character class "digit".
    
           The  wide-character class "upper" contains at least those characters wc
           which are equal to towupper(wc) and different from towlower(wc).
    
           The wide-character class "upper" always contains at least  the  letters
           'A' to 'Z'.
    
    
    

    RETURN VALUE

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

    CONFORMING TO

           C99.
    
    
    

    NOTES

           The behavior of iswupper() depends on the LC_CTYPE category of the cur-
           rent locale.
    
           This function is not very appropriate for dealing with Unicode  charac-
           ters,  because  Unicode knows about three cases: upper, lower and title
           case.
    
    
    

    SEE ALSO

           isupper(3), iswctype(3), towupper(3)
    
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