iswlower — test for lowercase wide character
#include <wctype.h>
int
iswlower( |
wint_t | wc) ; |
The iswlower
() function is
the wide-character equivalent of the islower(3) function. It
tests whether wc
is a
wide character belonging to the wide-character class
"lower".
The wide-character class "lower" is a subclass of the wide-character class "alpha", and therefore also a subclass of the wide-character class "alnum", 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 "lower" is disjoint from the wide-character class "cntrl".
Being a subclass of the wide-character class "graph", the wide-character class "lower" 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 "lower" is disjoint from the wide-character class "punct".
Being a subclass of the wide-character class "alpha", the wide-character class "lower" is disjoint from the wide-character class "digit".
The wide-character class "lower" contains at least those
characters wc
which
are equal to towlower(wc)
and different
from towupper(wc)
.
The wide-character class "lower" always contains at least the letters 'a' to 'z'.
The iswlower
() function
returns non-zero if wc
is a wide character
belonging to the wide-character class "lower". Otherwise it
returns zero.
The behaviour of iswlower
()
depends on the LC_CTYPE category of the current locale.
This function is not very appropriate for dealing with Unicode characters, because Unicode knows about three cases: upper, lower and title case.
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