gistfile1.rbx

#!/usr/bin/ruby
class A
  def dsl &block
    puts "dsl active"
    instance_eval &block
  end
  private
  def priv
    puts "This is private - please stay out"
  end
  def method_missing(m, *arg)
    puts "I #{m} #{arg.first}."
  end
end

a = A.new
a.dsl do
  priv
  write "something"
  yell "something"
  scream "something"
end