use_loader=

# File lib/irb/ext/use-loader.rb, line 50
    def use_loader=(opt)

      if IRB.conf[:USE_LOADER] != opt
        IRB.conf[:USE_LOADER] = opt
        if opt
          if !$".include?("irb/cmd/load")
          end
          (class<<@workspace.main;self;end).instance_eval {
            alias_method :load, :irb_load
            alias_method :require, :irb_require
          }
        else
          (class<<@workspace.main;self;end).instance_eval {
            alias_method :load, :__original__load__IRB_use_loader__
            alias_method :require, :__original__require__IRB_use_loader__
          }
        end
      end
      print "Switch to load/require#{unless use_loader; ' non';end} trace mode.\n" if verbose?
      opt
    end