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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sh-3ll 1.0
DIR:/opt/alt/ruby27/share/ruby/rexml/
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Current File : //opt/alt/ruby27/share/ruby/rexml/node.rb
# frozen_string_literal: false
require_relative "parseexception"
require_relative "formatters/pretty"
require_relative "formatters/default"

module REXML
  # Represents a node in the tree.  Nodes are never encountered except as
  # superclasses of other objects.  Nodes have siblings.
  module Node
    # @return the next sibling (nil if unset)
    def next_sibling_node
      return nil if @parent.nil?
      @parent[ @parent.index(self) + 1 ]
    end

    # @return the previous sibling (nil if unset)
    def previous_sibling_node
      return nil if @parent.nil?
      ind = @parent.index(self)
      return nil if ind == 0
      @parent[ ind - 1 ]
    end

    # indent::
    #   *DEPRECATED* This parameter is now ignored.  See the formatters in the
    #   REXML::Formatters package for changing the output style.
    def to_s indent=nil
      unless indent.nil?
        Kernel.warn( "#{self.class.name}.to_s(indent) parameter is deprecated", uplevel: 1)
        f = REXML::Formatters::Pretty.new( indent )
        f.write( self, rv = "" )
      else
        f = REXML::Formatters::Default.new
        f.write( self, rv = "" )
      end
      return rv
    end

    def indent to, ind
                        if @parent and @parent.context and not @parent.context[:indentstyle].nil? then
                                indentstyle = @parent.context[:indentstyle]
                        else
                                indentstyle = '  '
                        end
                        to << indentstyle*ind unless ind<1
    end

    def parent?
      false;
    end


    # Visit all subnodes of +self+ recursively
    def each_recursive(&block) # :yields: node
      self.elements.each {|node|
        block.call(node)
        node.each_recursive(&block)
      }
    end

    # Find (and return) first subnode (recursively) for which the block
    # evaluates to true. Returns +nil+ if none was found.
    def find_first_recursive(&block) # :yields: node
      each_recursive {|node|
        return node if block.call(node)
      }
      return nil
    end

    # Returns the position that +self+ holds in its parent's array, indexed
    # from 1.
    def index_in_parent
      parent.index(self)+1
    end
  end
end