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ruby--ruby/lib/rake/cloneable.rb
drbrain d001539a05 * lib/rake: Import Rake 0.9.2
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32217 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2011-06-23 22:11:55 +00:00

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Ruby

module Rake
# ##########################################################################
# Mixin for creating easily cloned objects.
#
module Cloneable
# Clone an object by making a new object and setting all the instance
# variables to the same values.
def dup
sibling = self.class.new
instance_variables.each do |ivar|
value = self.instance_variable_get(ivar)
new_value = value.clone rescue value
sibling.instance_variable_set(ivar, new_value)
end
sibling.taint if tainted?
sibling
end
def clone
sibling = dup
sibling.freeze if frozen?
sibling
end
end
end