Ruby2Ruby

Ruby2Ruby is a gem which allows you to look at the code of a class. To install do:

gem install ruby2ruby

(you may need to do a sudo in front of it)

Here's an example of its use:

  
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irb(main):001:0> require 'rubygems'
=> true
irb(main):002:0> require 'ruby2ruby'
=> true
irb(main):003:0> class Foo
irb(main):004:1> def fud
irb(main):005:2> puts "groo"
irb(main):006:2> end
irb(main):007:1> end
=> nil
irb(main):008:0> Ruby2Ruby.translate Foo
=> "class Foo < Object\n  def fud\n    puts(\"groo\")\n  end\nend"
irb(main):009:0> class Foo
irb(main):010:1> def fi
irb(main):011:2> puts "fo"
irb(main):012:2> end
irb(main):013:1> end
=> nil
irb(main):014:0> Ruby2Ruby.translate Foo
=> "class Foo < Object\n  def fi\n    puts(\"fo\")\n  end\n  \n  def fud\n    puts(\"groo\")\n  end\nend"
irb(main):015:0> class Foo
irb(main):016:1> def fud
irb(main):017:2> puts "Hello World!"
irb(main):018:2> end
irb(main):019:1> end
=> nil
irb(main):020:0> Ruby2Ruby.translate Foo
=> "class Foo < Object\n  def fi\n    puts(\"fo\")\n  end\n  \n  def fud\n    puts(\"Hello World!\")\n  end\nend"
irb(main):021:0>

Notice how it changes the class output. One thing I have found is that if you create instance variables outside of a method they won't show up in the output. Otherwise, it works quite well and is a good addition to a metaprogramming toolkit.