inline_include.rb

# -*- coding: utf-8 -*-
require 'continuation'

def with_caller_binding
  cc = nil
  count = 0
  set_trace_func lambda { |event, file, lineno, id, binding, klass|
    if count == 2
      set_trace_func nil
      cc.call yield(binding)
    elsif event == "return"
      count += 1
    end
  }
  return callcc { |cont| cc = cont }
end

class Object
  def method_missing(sym, *args)
    return unless args.first.respond_to?(:call)
    with_caller_binding do |b|
      args.first.call(eval("#{sym}", b))
    end
  end
end

def ∈(list)
  lambda {|x| list.include? x}
end

def oh_god_why
  elem = :bar
  list = [:foo, :baz, :bar]
  elem ∈ list
end

puts oh_god_why