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 function. It tests whether wc is a wide char
acter 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 charac
ter 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 non-zero if wc is a wide
character belonging to the wide character class "alpha".
Otherwise it returns zero.
CONFORMING TO
ISO/ANSI C, UNIX98
SEE ALSO
isalpha(3), iswctype(3)
NOTES
The behaviour of iswalpha depends on the LC_CTYPE category
of the current locale.
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