Module Cloneable
In: lib/more/facets/cloneable.rb

Clonable

Standard basis for adding deep dup and clone to a class. Provides a class with deep cloneablity via the standard dup and clone methods.

Methods

initialize_copy  

Public Instance methods

initialize_copy(sibling)

[Source]

    # File lib/more/facets/cloneable.rb, line 40
40:   def initialize_copy(sibling)
41:     #first duplicate my superclass' state. Note that if it's duplicating
42:     #instance variables, this will be overwritten, but this is important
43:     #because we could be dealing with a C extension with state hidden from
44:     #the Ruby interpreter
45:     super
46: 
47:     #we want to know if we're being dup'ed or clone'd, because we want to
48:     #preserve the state of our internals the same way our state is being
49:     #preserved. (If we can't figure it out, we'll just use #dup.)
50:     operation=caller.find{|x| x !~ /'initialize_copy'/}.
51:       match(/`(dup|clone)'/)[1] or :dup
52: 
53:     sibling.instance_variables.each do |ivar|
54:       value = sibling.instance_variable_get(ivar)
55: 
56:       #set my instance variable to be a #dup or #clone
57:       #or my sibling, depending on what's happening to me right now
58:       instance_variable_set(ivar, value.send(operation))
59:     end
60:   end

[Validate]