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                                                                                                                                                                                     #
#   irb/ext/cb.rb - 
#   	$Release Version: 0.9.5$
#   	$Revision: 11708 $
#   	$Date: 2007-02-13 08:01:19 +0900 (Tue, 13 Feb 2007) $
#   	by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#   
#

module IRB
  class Context

    def home_workspace
      if defined? @home_workspace
	@home_workspace
      else
	@home_workspace = @workspace
      end
    end

    def change_workspace(*_main)
      if _main.empty?
	@workspace = home_workspace 
	return main
      end
      
      @workspace = WorkSpace.new(_main[0])
      
      if !(class<<main;ancestors;end).include?(ExtendCommandBundle)
	main.extend ExtendCommandBundle
      end
    end

#     def change_binding(*_main)
#       back = @workspace
#       @workspace = WorkSpace.new(*_main)
#       unless _main.empty?
# 	begin
# 	  main.extend ExtendCommandBundle
# 	rescue
# 	  print "can't change binding to: ", main.inspect, "\n"
# 	  @workspace = back
# 	  return nil
# 	end
#       end
#       @irb_level += 1
#       begin
# 	catch(:SU_EXIT) do
# 	  @irb.eval_input
# 	end
#       ensure
# 	@irb_level -= 1
#  	@workspace = back
#       end
#     end
#     alias change_workspace change_binding
   end
end