ISWALPHA(3) Linux Programmer's Manual ISWALPHA(3)NAMEiswalpha - 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 isal‐
pha() 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 charac‐
ter class "alpha" is disjoint from the wide character class "cntrl".
Being a subclass of the wide character class "graph", the wide charac‐
ter 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 charac‐
ter 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 non-zero if wc is a wide character
belonging to the wide character class "alpha". Otherwise it returns
zero.
CONFORMING TO
C99.
SEE ALSOisalpha(3), iswctype(3)NOTES
The behaviour of iswalpha() depends on the LC_CTYPE category of the
current locale.
GNU 1999-07-25 ISWALPHA(3)