Backport BlankSlate removal from ActiveSupport::BasicObject [#5911 st…

…ate:resolved]

This is a backport of dd15a3f.

Signed-off-by: Andrew White <andyw@pixeltrix.co.uk>

activesupport/lib/active_support/basic_object.rb

@@ -1,13 +1,7 @@
# A base class with no predefined methods that tries to behave like Builder's
# BlankSlate in Ruby 1.9. In Ruby pre-1.9, this is actually the
# Builder::BlankSlate class.
#
# Ruby 1.9 introduces BasicObject which differs slightly from Builder's
# BlankSlate that has been used so far. ActiveSupport::BasicObject provides a
# barebones base class that emulates Builder::BlankSlate while still relying on
# Ruby 1.9's BasicObject in Ruby 1.9.
module ActiveSupport
  if defined? ::BasicObject
    # A class with no predefined methods that behaves similarly to Builder's
    # BlankSlate. Used for proxy classes.
    class BasicObject < ::BasicObject
      undef_method :==
      undef_method :equal?
@@ -18,7 +12,10 @@ def raise(*args)
      end
    end
  else
    require 'blankslate'
    BasicObject = BlankSlate
    class BasicObject #:nodoc:
      instance_methods.each do |m|
        undef_method(m) if m.to_s !~ /(?:^__|^nil\?$|^send$|^object_id$)/
      end
    end
  end
end