{"id":205493,"date":"2025-06-12T10:36:07","date_gmt":"2025-06-12T02:36:07","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205493\/"},"modified":"2025-06-12T10:36:07","modified_gmt":"2025-06-12T02:36:07","slug":"go-%e4%bb%a3%e7%a0%81%e4%b8%ad-_error-_errornil-%e7%9a%84%e4%bd%9c%e7%94%a8%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205493\/","title":{"rendered":"Go \u4ee3\u7801\u4e2d \\&#8221;_Error = (*_Error)(nil)\\&#8221; \u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p><span style=\"font-size: 15px\">\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\uff0c\u90a3\u4e48\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aGo \u4ee3\u7801\u4e2d \\&#8221;_Error = (*_Error)(nil)\\&#8221; \u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span>,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729913806671c63ce41ad1.jpg\" class=\"aligncenter\">,<br \/>\n<strong>\u5982\u4f55\u7406\u89e3 &#8220;_ error = (*_error)(nil)&#8221;<\/strong>,\u5728\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0cerror \u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u800c _error \u662f\u4e00\u4e2a\u7ed3\u6784\u4f53\u3002\u5224\u65ad\u4e00\u4e2a\u7ed3\u6784\u4f53\u662f\u5426\u5b9e\u73b0\u4e86\u67d0\u4e2a\u63a5\u53e3\uff0c\u901a\u5e38\u53ef\u4ee5\u5199\u6210\u8fd9\u6837\uff1a,\u90a3\u4e48\uff0c\u4e3a\u4ec0\u4e48\u8981\u5728\u4ee3\u7801\u7247\u6bb5\u4e2d\u589e\u52a0 (nil) \u5462\uff1f,\u8fd9\u662f\u56e0\u4e3a\u8fd9\u662f\u4e00\u4e2a\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u7684\u8bed\u6cd5\u3002\u5728 go \u4e2d\uff0c\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u53ef\u4ee5\u5f3a\u5236\u5c06\u4e00\u4e2a\u7279\u5b9a\u7c7b\u578b\u7684\u53d8\u91cf\u8f6c\u6362\u4e3a\u53e6\u4e00\u4e2a\u7c7b\u578b\u3002nil \u8868\u793a\u7a7a\u6307\u9488\u5730\u5740\uff08\u5373 0\uff09\uff0c\u662f\u4e00\u4e2a\u5360\u4f4d\u7b26\uff0c\u4e0d\u4f1a\u5206\u914d\u989d\u5916\u7684\u5730\u5740\u7a7a\u95f4\u3002,\u5728\u8fd9\u4e2a\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0c\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362 (*_error)(nil) \u5c06 nil \u5f3a\u5236\u8f6c\u6362\u4e3a *_error \u7c7b\u578b\uff0c\u4f46\u4fdd\u7559\u4e86 nil \u7684\u5730\u5740\uff08\u5373 0\uff09\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\uff1a,\u56e0\u6b64\uff0c_ error = (*_error)(nil) \u7684\u542b\u4e49\u662f\uff1a\u5f3a\u5236\u5c06 nil \u8f6c\u6362\u4e3a *_error \u7c7b\u578b\uff0c\u5e76\u7f16\u8bd1\u65f6\u68c0\u67e5 _error \u7ed3\u6784\u4f53\u662f\u5426\u5b9e\u73b0\u4e86 error \u63a5\u53e3\u3002\u8fd9\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6280\u672f\uff0c\u7528\u4e8e\u5728\u7f16\u8bd1\u65f6\u68c0\u6d4b\u63a5\u53e3\u662f\u5426\u5b9e\u73b0\u3002,\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aGo \u4ee3\u7801\u4e2d \\&#8221;_Error = (*_Error)(nil)\\&#8221; \u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01,<br \/>\n<strong>\u4f18\u5316\uff1a<\/strong>\u7531\u4e8e\u5df2\u7ecf\u77e5\u9053\u5f3a\u5236\u8f6c\u6362\u540e\u7684\u53d8\u91cf\u5730\u5740\u4e3a 0\uff0c\u7f16\u8bd1\u5668\u53ef\u4ee5\u8fdb\u884c\u4f18\u5316\uff0c\u907f\u514d\u5728\u8fd0\u884c\u65f6\u5206\u914d\u989d\u5916\u7684\u5185\u5b58\u3002,<br \/>\n<strong>\u7f16\u8bd1\u65f6\u63a5\u53e3\u68c0\u67e5\uff1a<\/strong>\u5b83\u5141\u8bb8\u7f16\u8bd1\u5668\u5728\u7f16\u8bd1\u65f6\u68c0\u67e5 _error \u7ed3\u6784\u4f53\u662f\u5426\u5b9e\u73b0\u4e86 error \u63a5\u53e3\u3002\u5982\u679c _error \u6ca1\u6709\u5b9e\u73b0\u8be5\u63a5\u53e3\uff0c\u7f16\u8bd1\u5668\u5c06\u62a5\u9519\u3002,\u5982\u4f55\u7406\u89e3 &#8220;_ error = (*_error)(nil)&#8221;,<br \/>\n<span style=\"font-size: 15px\">\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\uff0c\u90a3\u4e48\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aGo \u4ee3\u7801\u4e2d \\&#8221;_Error = (*_Error)(nil)\\&#8221; \u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span>,<br \/>\n<b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span> <span>Go \u4ee3\u7801\u4e2d \\&#8221;_Error = (*_Error)(nil)\\&#8221; \u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f<\/span><\/p>\n<h1>Go \u4ee3\u7801\u4e2d \\&#8221;_Error = (*_Error)(nil)\\&#8221; \u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f<\/h1>\n<p><span>2024-10-26 11:37:01<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p><span style=\"font-size: 15px\">\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">GOLANG<\/span>\uff0c\u90a3\u4e48\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aGo \u4ee3\u7801\u4e2d \\&#8221;_Error = (*_Error)(nil)\\&#8221; \u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729913806671c63ce41ad1.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u7406\u89e3 &#8220;_ error = (*_error)(nil)&#8221;<\/strong><\/p>\n<p>\u5728\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0cerror \u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u800c _error \u662f\u4e00\u4e2a\u7ed3\u6784\u4f53\u3002\u5224\u65ad\u4e00\u4e2a\u7ed3\u6784\u4f53\u662f\u5426\u5b9e\u73b0\u4e86\u67d0\u4e2a\u63a5\u53e3\uff0c\u901a\u5e38\u53ef\u4ee5\u5199\u6210\u8fd9\u6837\uff1a<\/p>\n<pre>var _ Error = (*_Error){}<\/pre>\n<p>\u90a3\u4e48\uff0c\u4e3a\u4ec0\u4e48\u8981\u5728\u4ee3\u7801\u7247\u6bb5\u4e2d\u589e\u52a0 (nil) \u5462\uff1f<\/p>\n<p>\u8fd9\u662f\u56e0\u4e3a\u8fd9\u662f\u4e00\u4e2a\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u7684\u8bed\u6cd5\u3002\u5728 go \u4e2d\uff0c\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u53ef\u4ee5\u5f3a\u5236\u5c06\u4e00\u4e2a\u7279\u5b9a\u7c7b\u578b\u7684\u53d8\u91cf\u8f6c\u6362\u4e3a\u53e6\u4e00\u4e2a\u7c7b\u578b\u3002nil \u8868\u793a\u7a7a\u6307\u9488\u5730\u5740\uff08\u5373 0\uff09\uff0c\u662f\u4e00\u4e2a\u5360\u4f4d\u7b26\uff0c\u4e0d\u4f1a\u5206\u914d\u989d\u5916\u7684\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n<p>\u5728\u8fd9\u4e2a\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0c\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362 (*_error)(nil) \u5c06 nil \u5f3a\u5236\u8f6c\u6362\u4e3a *_error \u7c7b\u578b\uff0c\u4f46\u4fdd\u7559\u4e86 nil \u7684\u5730\u5740\uff08\u5373 0\uff09\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\uff1a<\/p>\n<ul>\n<li><strong>\u7f16\u8bd1\u65f6\u63a5\u53e3\u68c0\u67e5\uff1a<\/strong>\u5b83\u5141\u8bb8\u7f16\u8bd1\u5668\u5728\u7f16\u8bd1\u65f6\u68c0\u67e5 _error \u7ed3\u6784\u4f53\u662f\u5426\u5b9e\u73b0\u4e86 error \u63a5\u53e3\u3002\u5982\u679c _error \u6ca1\u6709\u5b9e\u73b0\u8be5\u63a5\u53e3\uff0c\u7f16\u8bd1\u5668\u5c06\u62a5\u9519\u3002<\/li>\n<li><strong>\u4f18\u5316\uff1a<\/strong>\u7531\u4e8e\u5df2\u7ecf\u77e5\u9053\u5f3a\u5236\u8f6c\u6362\u540e\u7684\u53d8\u91cf\u5730\u5740\u4e3a 0\uff0c\u7f16\u8bd1\u5668\u53ef\u4ee5\u8fdb\u884c\u4f18\u5316\uff0c\u907f\u514d\u5728\u8fd0\u884c\u65f6\u5206\u914d\u989d\u5916\u7684\u5185\u5b58\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c_ error = (*_error)(nil) \u7684\u542b\u4e49\u662f\uff1a\u5f3a\u5236\u5c06 nil \u8f6c\u6362\u4e3a *_error \u7c7b\u578b\uff0c\u5e76\u7f16\u8bd1\u65f6\u68c0\u67e5 _error \u7ed3\u6784\u4f53\u662f\u5426\u5b9e\u73b0\u4e86 error \u63a5\u53e3\u3002\u8fd9\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6280\u672f\uff0c\u7528\u4e8e\u5728\u7f16\u8bd1\u65f6\u68c0\u6d4b\u63a5\u53e3\u662f\u5426\u5b9e\u73b0\u3002<\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aGo \u4ee3\u7801\u4e2d \\&#8221;_Error = (*_Error)(nil)\\&#8221; \u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   \u5b66\u4e60\u901a\u600e\u4e48\u4e0b\u8f7d\u7535\u8111\u7248\uff1f\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   golang\u6846\u67b6\u4e0e\u5927\u6570\u636e\u6846\u67b6\u7684\u96c6\u6210\u6307\u5bfc\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60GO&#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-205493","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205493","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=205493"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205493\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}