NAME

       iswlower - test for lowercase wide character

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <wctype.h>

       int iswlower(wint_t wc);

DESCRIPTION

       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'.

RETURN VALUE

       The iswlower() function returns nonzero if wc is a wide character belonging to the  wide-character  class
       "lower".  Otherwise, it returns zero.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).
       ┌──────────────────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │ Interface                                                            │ Attribute     │ Value          │
       ├──────────────────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │ iswlower()                                                           │ Thread safety │ MT-Safe locale │
       └──────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C99.

NOTES

       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.

SEE ALSO

       islower(3), iswctype(3), towlower(3)

Linux man-pages 6.7                                2023-10-31                                        iswlower(3)