iswalpha(3)

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

ATTRIBUTES

   For  an  explanation  of  the  terms  used   in   this   section,   see
   attributes(7).

   
   Interface   Attribute      Value          
   
   iswalpha()  Thread safety  MT-Safe locale 
   

CONFORMING TO

   POSIX.1-2001, POSIX.1-2008, C99.

NOTES

   The  behavior  of  iswalpha()  depends  on the LC_CTYPE category of the
   current locale.

SEE ALSO

   isalpha(3), iswctype(3)

COLOPHON

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