　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/ruby18/share/ri/1.8/system/Module/

Current File : //opt/alt/ruby18/share/ri/1.8/system/Module/class_eval-i.yaml

--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Evaluates the string or block in the context of <em>mod</em>. This can be used to add methods to a class. <tt>module_eval</tt> returns the result of evaluating its argument. The optional <em>filename</em> and <em>lineno</em> parameters set the text for error messages.
- !ruby/struct:SM::Flow::VERB 
  body: "   class Thing\n   end\n   a = %q{def hello() &quot;Hello there!&quot; end}\n   Thing.module_eval(a)\n   puts Thing.new.hello()\n   Thing.module_eval(&quot;invalid code&quot;, &quot;dummy&quot;, 123)\n"
- !ruby/struct:SM::Flow::P 
  body: <em>produces:</em>
- !ruby/struct:SM::Flow::VERB 
  body: "   Hello there!\n   dummy:123:in `module_eval': undefined local variable\n       or method `code' for Thing:Class\n"
full_name: Module#class_eval
is_singleton: false
name: class_eval
params: |
  mod.class_eval(string [, filename [, lineno]])  => obj
  mod.module_eval {|| block }                     => obj

visibility: public