晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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DIR:/opt/alt/ruby27/share/ruby/irb/ext/
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# frozen_string_literal: false
#
#   use-loader.rb -
#   	$Release Version: 0.9.6$
#   	$Revision$
#   	by Keiju ISHITSUKA(keiju@ruby-lang.org)
#
# --
#
#
#

require_relative "../cmd/load"
require_relative "loader"

class Object
  alias __original__load__IRB_use_loader__ load
  alias __original__require__IRB_use_loader__ require
end

module IRB
  module ExtendCommandBundle
    remove_method :irb_load if method_defined?(:irb_load)
    # Loads the given file similarly to Kernel#load, see IrbLoader#irb_load
    def irb_load(*opts, &b)
      ExtendCommand::Load.execute(irb_context, *opts, &b)
    end
    remove_method :irb_require if method_defined?(:irb_require)
    # Loads the given file similarly to Kernel#require
    def irb_require(*opts, &b)
      ExtendCommand::Require.execute(irb_context, *opts, &b)
    end
  end

  class Context

    IRB.conf[:USE_LOADER] = false

    # Returns whether +irb+'s own file reader method is used by
    # +load+/+require+ or not.
    #
    # This mode is globally affected (irb-wide).
    def use_loader
      IRB.conf[:USE_LOADER]
    end

    alias use_loader? use_loader

    remove_method :use_loader= if method_defined?(:use_loader=)
    # Sets <code>IRB.conf[:USE_LOADER]</code>
    #
    # See #use_loader for more information.
    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
  end
end