gistfile1.txt

require 'forwardable'                                                                                                                                                                                   
class A                                                                                                                                                                                                 
  def foo(*args)                                                                                                                                                                                        
    puts "from A; #{args.inspect}"                                                                                                                                                                      
  end                                                                                                                                                                                                   
end                                                                                                                                                                                                     
                                                                                                                                                                                                        
class C                                                                                                                                                                                                 
                                                                                                                                                                                                        
  extend Forwardable                                                                                                                                                                                    
                                                                                                                                                                                                        
  def_delegator :a, :foo                                                                                                                                                                                
                                                                                                                                                                                                        
  def a                                                                                                                                                                                                 
    @a ||= A.new                                                                                                                                                                                        
  end                                                                                                                                                                                                   
                                                                                                                                                                                                        
end                                                                                                                                                                                                     
                                                                                                                                                                                                        
c = C.new                                                                                                                                                                                               
c.foo # => from A; []                                                                                                                                                                                   
c.foo(1,2,3) # => from A; [1, 2, 3]