From: DMisener <DAMisener@...>
Date: 2008-03-06T04:50:00+09:00
Subject: How to create a class in callers context??

Here's a simple example of my predicament:

class Factory
    def self.generate name,_binding
        _name=name.to_s.capitalize
        eval %[
            class #{_name}
                def to_s
                    "#{_name}"
                end
            end
        ],_binding
    end
end

def Factory_generate what
    Factory.generate what,binding
end

Factory_generate :Thing
puts Factory::Thing.new rescue puts "Can't
Factory::Thing.new"                  # warning
puts Thing         .new rescue puts "Can't Thing.new"

class Universe
    def initialize
        Factory_generate :Planet
        puts Universe::Planet.new rescue puts "Can't
Universe::Planet.new"      # warning
        puts Planet          .new rescue puts "Can't Planet.new"
    end
end

Universe.new

puts Universe::Planet.new rescue puts "Can't
Universe::Planet.new"              # warning
puts Planet          .new rescue puts "Can't Planet.new"

---------------------------------------------
results in the following surprising output:

C:/Work/class_eval.rb:20: warning: toplevel constant Thing referenced
by Factory::Thing
Thing
Thing
C:/Work/class_eval.rb:26: warning: toplevel constant Planet referenced
by Universe::Planet
Planet
Planet
C:/Work/class_eval.rb:33: warning: toplevel constant Planet referenced
by Universe::Planet
Planet
Planet
----------------------------------------------
Questions:

1) What's the correct way to doing this?
2) I would have thought the non-qualified class references would have
generated exceptions.
3) What is the warning message trying to convey.