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-'\" t
-.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
-.\"
-.\" SPDX-License-Identifier: GPL-2.0-or-later
-.\"
-.\" References consulted:
-.\"   GNU glibc-2 source code and manual
-.\"   Dinkumware C library reference http://www.dinkumware.com/
-.\"   OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
-.\"   ISO/IEC 9899:1999
-.\"
-.TH iswupper 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-iswupper \- test for uppercase wide character
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <wctype.h>
-.P
-.BI "int iswupper(wint_t " wc );
-.fi
-.SH DESCRIPTION
-The
-.BR iswupper ()
-function is the wide-character equivalent of the
-.BR isupper (3)
-function.
-It tests whether
-.I wc
-is a wide character
-belonging to the wide-character class "upper".
-.P
-The wide-character class "upper" 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".
-.P
-Being a subclass of the wide-character class "print", the wide-character class
-"upper" is disjoint from the wide-character class "cntrl".
-.P
-Being a subclass of the wide-character class "graph", the wide-character class
-"upper" is disjoint from the wide-character class "space" and its subclass
-"blank".
-.P
-Being a subclass of the wide-character class "alnum", the wide-character class
-"upper" is disjoint from the wide-character class "punct".
-.P
-Being a subclass of the wide-character class "alpha", the wide-character class
-"upper" is disjoint from the wide-character class "digit".
-.P
-The wide-character class "upper" contains at least those characters
-.I wc
-which are equal to
-.I towupper(wc)
-and different from
-.IR towlower(wc) .
-.P
-The wide-character class "upper" always contains at least the
-letters \[aq]A\[aq] to \[aq]Z\[aq].
-.SH RETURN VALUE
-The
-.BR iswupper ()
-function returns nonzero if
-.I wc
-is a wide character
-belonging to the wide-character class "upper".
-Otherwise, it returns zero.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.na
-.nh
-.BR iswupper ()
-T}	Thread safety	MT-Safe locale
-.TE
-.SH STANDARDS
-C11, POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001, C99.
-.SH NOTES
-The behavior of
-.BR iswupper ()
-depends on the
-.B LC_CTYPE
-category of the
-current locale.
-.P
-This function is not very appropriate for dealing with Unicode characters,
-because Unicode knows about three cases: upper, lower, and title case.
-.SH SEE ALSO
-.BR isupper (3),
-.BR iswctype (3),
-.BR towupper (3)