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module ActsAsFerret
if defined?(BasicObject)
# Ruby 1.9.x
class BlankSlate < BasicObject
end
elsif defined?(BlankSlate)
# Rails 2.x has it already
class BlankSlate < ::BlankSlate
end
else
# 'backported' for Rails pre 2.0
#
#--
# Copyright 2004, 2006 by Jim Weirich (jim@weirichhouse.org).
# All rights reserved.
# Permission is granted for use, copying, modification, distribution,
# and distribution of modified versions of this work as long as the
# above copyright notice is included.
#++
######################################################################
# BlankSlate provides an abstract base class with no predefined
# methods (except for <tt>\_\_send__</tt> and <tt>\_\_id__</tt>).
# BlankSlate is useful as a base class when writing classes that
# depend upon <tt>method_missing</tt> (e.g. dynamic proxies).
#
class BlankSlate
class << self
# Hide the method named +name+ in the BlankSlate class. Don't
# hide +instance_eval+ or any method beginning with "__".
def hide(name)
if instance_methods.include?(name.to_s) and name !~ /^(__|instance_eval|methods)/
@hidden_methods ||= {}
@hidden_methods[name.to_sym] = instance_method(name)
undef_method name
end
end
# Redefine a previously hidden method so that it may be called on a blank
# slate object.
#
# no-op here since we don't hide the methods we reveal where this is
# used in this implementation
def reveal(name)
end
end
instance_methods.each { |m| hide(m) }
end
end
end
Version data entries
10 entries across 10 versions & 2 rubygems