iswalpha — test for alphabetic wide character
#include <wctype.h>
int
iswalpha( |
wint_t | wc) ; |
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'.
The iswalpha
() function
returns nonzero if wc
is a wide character belonging to the wide-character class
"alpha". Otherwise it returns zero.