class WeakRef
Weak Reference class that allows a referenced object to be garbage-collected.
A WeakRef
may be used exactly like the object it references.
Usage:
foo = Object.new # create a new object instance p foo.to_s # original's class foo = WeakRef.new(foo) # reassign foo with WeakRef instance p foo.to_s # should be same class GC.start # start the garbage collector p foo.to_s # should raise exception (recycled)
Constants
- VERSION
Public Class Methods
new(orig)
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Creates a weak reference to orig
Calls superclass method
# File weakref.rb, line 34 def initialize(orig) case orig when true, false, nil @delegate_sd_obj = orig else @@__map[self] = orig end super end
Public Instance Methods
weakref_alive?()
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Returns true if the referenced object is still alive.
# File weakref.rb, line 55 def weakref_alive? @@__map.key?(self) or defined?(@delegate_sd_obj) end