From: Gaspard Bucher <gaspard@...>
Date: 2007-09-25T21:17:32+09:00
Subject: create a class in a class with eval

I need to eval code that will create globally available classes. I tried this :

class Test
  def makeA
    Module.send(:eval, "class A; end")
    # same with: eval "class A; end"
    puts Test.const_get('A') # => Test::A
    puts Module.const_get('A') # => raise NameError, why ?
  end
end

eval "class B; end"
puts Module.const_get('B') # => B

Test.new.makeA #=> bang

Thanks for your help.

Gaspard