libwchar2 0.0.10
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iswlower - test for lowercase wide character
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-charac- ter class lower
is disjoint from the wide-character class cntrl
.
Being a subclass of the wide-character class graph
, the wide-charac- ter 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-charac- ter class lower
is disjoint from the wide-character class punct
.
Being a subclass of the wide-character class alpha
, the wide-charac- ter 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 nonzero if wc
is a wide character belonging to the wide-character class lower
.
Otherwise, it returns zero.
The behavior 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.