From: "Kristoffer Lundén" <kristoffer.lunden@...>
Date: 2007-03-31T09:46:01+09:00
Subject: Re: Find the fully qualified name of a class from a string

On 3/31/07, Nasir Khan <rubylearner@gmail.com> wrote:> Anyway, there could be several uses for such a thing. Simplest use case> would be a RAILS like (but not RAILS) situation where a controller is> deployed on a running server which (controller) optionally comes as a string> enveloped in a protocol message, this string is evaled and the controller is> instatiated but the system also needs to maintain meta information including> the name of the controller just deployed, which defaults to the fully> qualified name of the class.> My use case is similar.>
Here's one way to capture that info as it's evaled. Not thread-safeas-is. Not even sure if it's useful at all, but I was a bit curious.There's more ways to do this, of course, especially depending on whenyou want to capture this info.
str = <<EOFmodule A  class B    def b      puts "hello"    end endendEOF
set_trace_func proc {|event, file, line, id, binding, classname|  return unless event == 'class'  name = eval('self.class == Class && Module.nesting[0]', binding)  if name    # Do something with name  end}
eval(str)
set_trace_func(nil)


-- Kristoffer Lundén✉ kristoffer.lunden@gmail.com✉ kristoffer.lunden@gamemaker.nuhttp://www.gamemaker.nu/☎ 0704 48 98 77