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
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