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tag: v3.1.1.rc3
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require 'active_support/ordered_hash'
# Usually key value pairs are handled something like this:
#
# h = {}
# h[:boy] = 'John'
# h[:girl] = 'Mary'
# h[:boy] # => 'John'
# h[:girl] # => 'Mary'
#
# Using <tt>OrderedOptions</tt>, the above code could be reduced to:
#
# h = ActiveSupport::OrderedOptions.new
# h.boy = 'John'
# h.girl = 'Mary'
# h.boy # => 'John'
# h.girl # => 'Mary'
#
module ActiveSupport #:nodoc:
class OrderedOptions < OrderedHash
alias_method :_get, :[] # preserve the original #[] method
protected :_get # make it protected
def []=(key, value)
super(key.to_sym, value)
end
def [](key)
super(key.to_sym)
end
def method_missing(name, *args)
if name.to_s =~ /(.*)=$/
self[$1] = args.first
else
self[name]
end
end
def respond_to?(name)
true
end
end
class InheritableOptions < OrderedOptions
def initialize(parent = nil)
if parent.kind_of?(OrderedOptions)
# use the faster _get when dealing with OrderedOptions
super() { |h,k| parent._get(k) }
elsif parent
super() { |h,k| parent[k] }
else
super()
end
end
def inheritable_copy
self.class.new(self)
end
end
end
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