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Set::Object::Weak.3pm

NAME

Set::Object::Weak - Sets without the referant reference increment

SYNOPSIS

  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't objects
 
 

DESCRIPTION

Sets, but weak. See ``weaken'' in Set::Object.

Note that the "set" in "Set::Object::Weak" returns weak sets. This is intentional, so that you can make all the sets in scope weak just by changing "use Set::Object" to "use Set::Object::Weak".

CONSTRUCTORS

new

This class method is exactly the same as "Set::Object->new", except that it returns a weak set.

weak_set( ... )

This optionally exported function is a shortcut for saying "Set::Object::Weak->new(...)".

set( ... )

This method is exported so that if you see:

  use Set::Object qw(set);
 
 

You can turn it into using weak sets lexically with:

  use Set::Object::Weak qw(set);
 
 

Set::Object 1.19 had a bug in this method that meant that it would not add the passed members into it.

SEE ALSO

Set::Object

CREDITS

Perl magic by Sam Vilain, <samv@cpan.org>

Idea from nothingmuch.