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.Dd March 4, 2003 .Dt ISWCTYPE 3 .Os ----------------------------------------------------------------------
.Sh NAME .Nm iswctype .Nd test a character for character class identifier ----------------------------------------------------------------------
.Sh LIBRARY .Lb libc ----------------------------------------------------------------------
.Sh SYNOPSIS n wctype.h .Ft int .Fn iswctype "wint_t wc" "wctype_t charclass" ----------------------------------------------------------------------
.Sh DESCRIPTION The .Fn iswctype function returns a boolean value that indicates whether a wide character .Fa wc is in .Fa charclass .
p The behaviour of .Fn iswctype is undefined if the .Fn iswctype function is called with an invalid .Fa charclass (changes of .Dv LC_CTYPE category invalidate .Fa charclass ) or invalid wide character .Fa wc .
p
The behaviour of
.Fn iswctype
is affected by the
.Dv LC_CTYPE
category of the current locale.
----------------------------------------------------------------------
.Sh RETURN VALUES
The
.Fn iswctype
returns:
l -tag -width 012345678901 t 0 .Fa wc
is not in
.Fa charclass .
t non-zero .Fa wc
is in
.Fa charclass .
.El
p
----------------------------------------------------------------------
.Sh ERRORS
No errors are defined.
----------------------------------------------------------------------
.Sh SEE ALSO
.Xr setlocale 3 ,
.Xr towctrans 3 ,
.Xr wctrans 3 ,
.Xr wctype 3
----------------------------------------------------------------------
.Sh STANDARDS
The
.Fn iswctype
function conforms to
.St -isoC-amd1 .
Indexes created Sun Sep 21 20:09:37 GMT 2025