require 'defly'

class Warrior
  attr_accessor :hp, :mp

  def sleep
    self.hp += 10
    self.mp += 2
  end
end

Warrior.debug!
Warrior.new.trace([:hp, :hp=, :mp, :mp=, :sleep], [:@hp, :@mp]) do |warrior|
  warrior.hp = 10
  warrior.mp = 20
  warrior.sleep
end

irb(main):001:0> require 'defly'
=> true
irb(main):002:0> require 'bug'
NoMethodError: undefined method `is_annoying' for "debugging":String
bug.rb:1> "debugging".<<is_annoying>>
	from /Users/eggegg/bug.rb:1:in `<top (required)>'
	...

class Rocket
  def launch
    @reason = "Bugs invasion"
    raise "Engine Fail"
  end
end

Rocket.debug!
rocket = Rocket.new
rocket.watch_error "Engine Fail"
rocket.launch

irb(main):001:0> require 'defly'
=> true
irb(main):002:0> require 'shoulda', :verbose => true
shoulda cannot be required
LoadError: no such file to load -- shoulda
  from /Users/eggegg/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
  from /Users/eggegg/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
  from /Users/eggegg/.rvm/gems/ruby-1.9.2-p290/gems/defly-0.2.0/lib/defly/require_path.rb:23:in `require'
  from (irb):2
  from /Users/eggegg/.rvm/rubies/ruby-1.9.2-p290/bin/irb:16:in `<main>'
irb(main):003:0> require 'rdoc', :verbose => true
Requiring /Users/eggegg/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/1.9.1/rdoc.rb
=> true