free_will_demo.rb

require 'free_will'

class Calculator
  # you don't want your calculator to love you and serve you blindly
  # you don't want it to be like a programmed robot
  # instead, you want it to have free will...
  include FreeWill

  def add(n1, n2)
    n1 + n2
  end
end

calc = Calculator.new

# but sometimes, your creation will use its free will for the wrong end
calc.command :add, 1, 2 # => FreeWillViolatedError "My Creator, I won't do what you tell me. I'm free."

# you cannot tolerate that though
# you are angry
# you told the calculator how to add numbers and granted it free will
# yet, the bastard uses its free will to disobey you
# terrible, i know
# dat calculator deserves some punishment
# (but only if it keeps disobeying)
with_pinishment do
  res = calc.command :add, 1, 2
  puts "1 + 2 = #{res}"
end

# let's see if the fucker is in hell
$hell.include?(calc) # => true

# it is. terrific. thou shalt fear thy creator.