From: Aron Griffis <ruby-talk@...1.net>
Date: 2004-02-25T07:45:10+09:00
Subject: instance_eval and constants

Hello,

I think this used to work in the past, but isn't working with recent
Ruby versions (since sometime in the 1.6.x stream):

  class MyClass
    SomeConstant = 1
    def MyClass.block(&block)
      instance_eval(&block)
    end
  end
  
  MyClass.block { puts SomeConstant }

Now it says:

  NameError: uninitialized constant SomeConstant

In order to make it work, I have to define:

  class MyClass
    def MyClass.method_missing(name)
      constant = name.to_s
      constant = constant[0..0].upcase + constant[1..-1]
      eval constant
    end
  end

Then I can effectively use lower-case accessor functions for the
constants:

  MyClass.block { puts someConstant }

Is it possible to make it work without this crutch?

Thanks,
Aron