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.\" ========================================================================
.\"
.IX Title "Set::Object::Weak 3pm"
.TH Set::Object::Weak 3pm "2018-11-02" "perl v5.28.0" "User Contributed Perl Documentation"
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.SH "NAME"
Set::Object::Weak \- Sets without the referant reference increment
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& use Set::Object::Weak qw(weak_set);
\&
\& my $set = Set::Object::Weak\->new( 0, "", {}, [], $object );
\& # or
\& my $set = weak_set( 0, "", {}, [], $object );
\&
\& print $set\->size;  # 2 \- the scalars aren\*(Aqt objects
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Sets, but weak.  See \*(L"weaken\*(R" in Set::Object.
.PP
Note that the \f(CW\*(C`set\*(C'\fR in \f(CW\*(C`Set::Object::Weak\*(C'\fR returns weak sets.  This
is intentional, so that you can make all the sets in scope weak just
by changing \f(CW\*(C`use Set::Object\*(C'\fR to \f(CW\*(C`use Set::Object::Weak\*(C'\fR.
.SH "CONSTRUCTORS"
.IX Header "CONSTRUCTORS"
.IP "new" 4
.IX Item "new"
This class method is exactly the same as \f(CW\*(C`Set::Object\->new\*(C'\fR,
except that it returns a weak set.
.IP "weak_set( ... )" 4
.IX Item "weak_set( ... )"
This optionally exported \fBfunction\fR is a shortcut for saying
\&\f(CW\*(C`Set::Object::Weak\->new(...)\*(C'\fR.
.IP "set( ... )" 4
.IX Item "set( ... )"
This method is exported so that if you see:
.Sp
.Vb 1
\& use Set::Object qw(set);
.Ve
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You can turn it into using weak sets lexically with:
.Sp
.Vb 1
\& use Set::Object::Weak qw(set);
.Ve
.Sp
Set::Object 1.19 had a bug in this method that meant that it would not
add the passed members into it.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Set::Object
.SH "CREDITS"
.IX Header "CREDITS"
Perl magic by Sam Vilain, <samv@cpan.org>
.PP
Idea from nothingmuch.