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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 iswblank 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-iswblank \- test for whitespace wide character
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <wctype.h>
-.PP
-.BI "int iswblank(wint_t " wc );
-.fi
-.PP
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.PP
-.BR iswblank ():
-.nf
-    _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
-.fi
-.SH DESCRIPTION
-The
-.BR iswblank ()
-function is the wide-character equivalent of the
-.BR isblank (3)
-function.
-It tests whether \fIwc\fP is a wide character
-belonging to the wide-character class "blank".
-.PP
-The wide-character class "blank" is a subclass of the wide-character class
-"space".
-.PP
-Being a subclass of the wide-character class "space",
-the wide-character class "blank" is disjoint from the
-wide-character class "graph" and therefore also disjoint
-from its subclasses "alnum", "alpha", "upper", "lower", "digit",
-"xdigit", "punct".
-.PP
-The wide-character class "blank" always contains
-at least the space character
-and the control character \[aq]\et\[aq].
-.SH RETURN VALUE
-The
-.BR iswblank ()
-function returns nonzero
-if \fIwc\fP is a wide character
-belonging to the wide-character class "blank".
-Otherwise, it returns zero.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.ad l
-.nh
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.BR iswblank ()
-T}	Thread safety	MT-Safe locale
-.TE
-.hy
-.ad
-.sp 1
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001.
-.SH NOTES
-The behavior of
-.BR iswblank ()
-depends on the
-.B LC_CTYPE
-category of the
-current locale.
-.SH SEE ALSO
-.BR isblank (3),
-.BR iswctype (3)