SYNOPSIS

     #include <wctype.h>

     int
     iswctype(wint_t wc, wctype_t charclass);

     wctype_t
     wctype(const char *property);

     #include <xlocale.h>

     int
     iswctype_l(wint_t wc, wctype_t charclass, locale_t loc);

     wctype_t
     wctype_l(const char *property, locale_t loc);

DESCRIPTION

     The wctype() function returns a value of type wctype_t which represents
     the requested wide character class and may be used as the second argument
     for calls to iswctype().

     The following character class names are recognised:

           alnum   cntrl   ideogram   print   space   xdigit
           alpha   digit   lower      punct   special
           blank   graph   phonogram  rune    upper

     The iswctype() function checks whether the wide character wc is in the
     character class charclass.

     While the iswctype() and wctype() functions use the current locale, the
     iswctype_l() and wctype_l() functions may be passed locales directly. See
     xlocale(3) for more information.

RETURN VALUES

     The iswctype() function returns non-zero if and only if wc has the prop-
     erty described by charclass, or charclass is zero.

     The wctype() function returns 0 if property is invalid, otherwise it
     returns a value of type wctype_t that can be used in subsequent calls to
     iswctype().

EXAMPLES

     Reimplement iswalpha(3) in terms of iswctype() and wctype():

           int
           myiswalpha(wint_t wc)
           {
                   return (iswctype(wc, wctype("alpha")));
           }