trusty (3) iswalpha.3.gz

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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(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 3.54 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/.