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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 iswspace 3 2023-07-20 "Linux man-pages 6.05.01"
+.SH NAME
+iswspace \- test for whitespace wide character
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.B #include <wctype.h>
+.PP
+.BI "int iswspace(wint_t " wc );
+.fi
+.SH DESCRIPTION
+The
+.BR iswspace ()
+function is the wide-character equivalent of the
+.BR isspace (3)
+function.
+It tests whether
+.I wc
+is a wide character
+belonging to the wide-character class "space".
+.PP
+The wide-character class "space" is disjoint from the wide-character class
+"graph" and therefore also disjoint from its subclasses "alnum", "alpha",
+"upper", "lower", "digit", "xdigit", "punct".
+.\" Note: UNIX98 (susv2/xbd/locale.html) says that "space" and "graph" may
+.\" have characters in common, except U+0020. But C99 (ISO/IEC 9899:1999
+.\" section 7.25.2.1.10) says that "space" and "graph" are disjoint.
+.PP
+The wide-character class "space" contains the wide-character class "blank".
+.PP
+The wide-character class "space"
+always contains at least the space character
+and the control characters
+\[aq]\ef\[aq], \[aq]\en\[aq], \[aq]\er\[aq], \[aq]\et\[aq], and \[aq]\ev\[aq].
+.SH RETURN VALUE
+The
+.BR iswspace ()
+function returns nonzero if
+.I wc
+is a wide character
+belonging to the wide-character class "space".
+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 iswspace ()
+T}	Thread safety	MT-Safe locale
+.TE
+.sp 1
+.SH STANDARDS
+C11, POSIX.1-2008.
+.SH HISTORY
+POSIX.1-2001, C99.
+.SH NOTES
+The behavior of
+.BR iswspace ()
+depends on the
+.B LC_CTYPE
+category of the
+current locale.
+.SH SEE ALSO
+.BR isspace (3),
+.BR iswctype (3)