Ruby's private_constant example

private_constant.rb

module Foo
  class Bar
 
  end
 
  private_constant :Bar
end
 
module Foo
  p Bar.new # => works fine because we're scoped to Foo
 
  class Baz
    p Bar.new # => still fine, because we're still scoped to Foo
  end
end
 
begin
  Foo::Bar # => private constant Foo::Bar referenced
rescue Exception => e
  puts e.message
end