{"id":207202,"date":"2025-07-08T08:19:34","date_gmt":"2025-07-08T00:19:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207202\/"},"modified":"2025-07-08T08:19:34","modified_gmt":"2025-07-08T00:19:34","slug":"%e5%b0%86-nil-%e8%bd%ac%e6%8d%a2%e4%b8%ba%e6%8e%a5%e5%8f%a3%e7%9a%84%e5%85%a8%e5%b1%80%e5%8f%98%e9%87%8f-_-%e7%9a%84%e5%90%ab%e4%b9%89%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207202\/","title":{"rendered":"\u5c06 nil \u8f6c\u6362\u4e3a\u63a5\u53e3\u7684\u5168\u5c40\u53d8\u91cf _ \u7684\u542b\u4e49\u662f\u4ec0\u4e48"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>&gt;<\/span> <span>\u5c06 nil \u8f6c\u6362\u4e3a\u63a5\u53e3\u7684\u5168\u5c40\u53d8\u91cf _ \u7684\u542b\u4e49\u662f\u4ec0\u4e48<\/span><\/p>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-20 19:45:21<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u5927\u5bb6\u597d\uff0c\u4eca\u5929\u672c\u4eba\u7ed9\u5927\u5bb6\u5e26\u6765\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5c06 nil \u8f6c\u6362\u4e3a\u63a5\u53e3\u7684\u5168\u5c40\u53d8\u91cf _ \u7684\u542b\u4e49\u662f\u4ec0\u4e48\u300b<\/span>\uff0c\u6587\u4e2d\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span><\/span>\uff0c\u5982\u679c\u4f60\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u90a3\u5c31\u8bf7\u5404\u4f4d\u670b\u53cb\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427~\u5e0c\u671b\u80fd\u771f\u6b63\u5e2e\u5230\u4f60\u4eec\uff0c\u8c22\u8c22\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u8bd5\u56fe\u4ece\u56fe\u7684\u6e90\u4ee3\u7801\u4e2d\u7406\u89e3\u5168\u5c40\u53d8\u91cf _ \u7684\u4f5c\u7528\uff0c\u5982\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u4f46\u6700\u540e\u6211\u4e0d\u660e\u767d\u5b83\u7684\u542b\u4e49\u662f\u4ec0\u4e48\u3002<\/p>\n<pre>type variable_ interface {\n    cin()\n}\n\ntype imple struct {\n}\n\nfunc (i *imple) cin() {\n    fmt.Println(\"cout\")\n}\n\nvar (\n    _ = variable_((*imple)(nil))\n)<\/pre>\n<p> <\/p>\n<h2>\u6b63\u786e\u7b54\u6848<\/h2>\n<p> <\/p>\n<p><code>_<\/code> \u5728 GO \u4e2d\u59cb\u7ec8\u610f\u5473\u7740\u5ffd\u7565\u3002 <code>_ = variable_((*imple)(nil))<\/code> \u7684\u76ee\u7684\u662f\u5728\u7f16\u8bd1\u65f6\u68c0\u67e5 <code>*impl<\/code> \u662f\u5426\u5b9e\u73b0 <code>variable_<\/code><\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u5c06 nil \u8f6c\u6362\u4e3a\u63a5\u53e3\u7684\u5168\u5c40\u53d8\u91cf _ \u7684\u542b\u4e49\u662f\u4ec0\u4e48\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03Golang\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207202","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207202"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207202\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}