From: George Ogata <g_ogata@...>
Date: 2006-02-27T08:08:36+09:00
Subject: Re: Scope of constants in instance_eval

George Ogata <g_ogata@optushome.com.au> writes:

> "Phrogz" <gavin@refinery.com> writes:
>
>> Evaling as a string works. (Constant is resolved.)
>
> But only in 1.9, if I understand you correctly.

Sorry, I see this follows on from Jim's post.

Here's a silly idea that might make your other syntax work.


$bindings = []
def Object.const_missing(name)
  if $bindings.empty?
    raise NameError, "uninitialized constant #{name}"
  end
  binding = $bindings.pop
  eval(name.to_s, binding)
ensure
  $bindings.push(binding)
end

class C
  def initialize &b
    $bindings.push binding
    instance_eval(&b)
  ensure
    $bindings.pop
  end
  X = 2
end

C.new{puts X}