debian man page for iswalpha

ISWALPHA(3)						     Linux Programmer's Manual						       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.

CONFORMING TO
       C99.

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

SEE ALSO
       isalpha(3), iswctype(3)

COLOPHON
       This  page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    1999-07-25							       ISWALPHA(3)