vendor/rails/activesupport/lib/active_support/option_merger.rb

   1 module ActiveSupport
   2   class OptionMerger #:nodoc:
   3     instance_methods.each do |method|
   4       undef_method(method) if method !~ /^(__|instance_eval|class|object_id)/
   5     end
   6
   7     def initialize(context, options)
   8       @context, @options = context, options
   9     end
  10
  11     private
  12       def method_missing(method, *arguments, &block)
  13         if arguments.last.is_a?(Proc)
  14           proc = arguments.pop
  15           arguments << lambda { |*args| @options.deep_merge(proc.call(*args)) }
  16         else
  17           arguments << (arguments.last.respond_to?(:to_hash) ? @options.deep_merge(arguments.pop) : @options.dup)
  18         end
  19
  20         @context.__send__(method, *arguments, &block)
  21       end
  22   end
  23 end