printing a ruby block

Question

I have a method that takes a block.

Obviously I don't know what is going to be passed in and for bizarre reasons that I won't go into here I want to print the contents of the block.

Is there a way to do this?

Answer 1

You can do this with Ruby2Ruby which implements a to_ruby method.

require 'rubygems'
require 'parse_tree'
require 'parse_tree_extensions'
require 'ruby2ruby'

def meth &block
  puts block.to_ruby
end

meth { some code }

will output:

"proc { some(code) }"

I would also check out this awesome talk by Chris Wanstrath of Github http://goruco2008.confreaks.com/03%5Fwanstrath.html He shows some interesting ruby2ruby and parsetree usage examples.

Answer 2

There is no way to do this in Ruby 1.9.