From: Paul Brannan <pbrannan@...>
Date: 2001-10-04T06:35:19+09:00
Subject: [ruby-talk:22031] Re: Marshal won't dump a Proc

How about the following?  The only major disadvantage is that it will be a
little bit slower than using a real Proc:

require 'delegate'

class DumpableProc < DelegateClass(Proc)
  def initialize(str)
    eval "@proc = proc { #{str} }"
    @str = str
    super(@proc)
  end

  def _dump(limit)
    @str
  end

  def self._load(str)
    self.new(str)
  end
end

dp = DumpableProc.new("puts 'foo!'")
dp.call()

dump_str = Marshal.dump(dp)
puts dump_str

dp2 = Marshal.load(dump_str)
dp2.call()