module RSpec::Core::SharedExampleGroup

def shared_context(*args, &block)
  if String === args.first || Symbol === args.first
    name = args.shift
    ensure_shared_example_group_name_not_taken(name)
    RSpec.world.shared_example_groups[name] = block
  end
  unless args.empty?
    mod = Module.new
    (class << mod; self; end).send(:define_method, :extended) do |host|
      host.class_eval(&block)
    end
    RSpec.configuration.extend(mod, *args)
  else
  end
end