From: Joel VanderWerf <joelvanderwerf@...>
Date: 2010-11-09T12:32:29+09:00
Subject: Re: binding of a Method object?

On 11/08/2010 06:58 PM, John Mair wrote:
> Hi,
>
> some methods can be defined like so:
>
>      class Test
>        y = :hello
>        define_method(:hello) { y }
>      end
>
> Can I get access to the bindings of the Test method object so i can
> access and modify the 'y' variable?
>
>      t = Test.new.method(:hello).send(:binding).eval('y')
>
> and so on does not appear to work.

Can't think of an easy way to do that, but does this help?

   class Test
     def self.define_method(name, &bl)
       (@procs||={})[name] = bl
       super
     end

     def self.eval_in_class_scope_around_method method, str
       eval str, @procs[method]
     end

     y = :hello_world
     define_method(:hello) { y }
   end

#  t = Test.new.method(:hello).send(:binding).eval('y')

   p Test.eval_in_class_scope_around_method :hello, "y"

You can of course put the two class methods in a module and extend Test 
with it.

There is also binding_of_caller, but at least the above is fairly 
elementary ruby.