{"id":206712,"date":"2025-06-12T13:47:27","date_gmt":"2025-06-12T05:47:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206712\/"},"modified":"2025-06-12T13:47:27","modified_gmt":"2025-06-12T05:47:27","slug":"go-%e8%af%ad%e8%a8%80%e4%b8%ad-defer-%e7%9a%84%e8%be%93%e5%87%ba%e9%a1%ba%e5%ba%8f%ef%bc%9a%e4%b8%ba%e4%bd%95%e8%be%93%e5%87%ba%e7%bb%93%e6%9e%9c%e4%b8%ba-2%e3%80%811%e3%80%811%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206712\/","title":{"rendered":"Go \u8bed\u8a00\u4e2d defer \u7684\u8f93\u51fa\u987a\u5e8f\uff1a\u4e3a\u4f55\u8f93\u51fa\u7ed3\u679c\u4e3a 2\u30011\u30011\uff1f"},"content":{"rendered":"

GOLANG\u4eca\u5929\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765
\n\u300aGo \u8bed\u8a00\u4e2d defer \u7684\u8f93\u51fa\u987a\u5e8f\uff1a\u4e3a\u4f55\u8f93\u51fa\u7ed3\u679c\u4e3a 2\u30011\u30011\uff1f\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230
\n<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u662f\u6b63\u5728\u5b66\u4e60
\nGOLANG<\/span>\u6216\u8005\u5df2\u7ecf\u662f\u5927\u4f6c\u7ea7\u522b\u4e86\uff0c\u90fd\u975e\u5e38\u6b22\u8fce\u4e5f\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u7ed9\u6211\u5efa\u8bae\u8bc4\u8bba\u54c8~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff01,
\n,
\n\u6df1\u5165\u7406\u89e3 go \u8bed\u8a00\u4e2d defer \u8f93\u51fa\u7684\u5965\u79d8<\/strong>,\u5728 go \u8bed\u8a00\u4e2d\uff0cdefer \u5173\u952e\u5b57\u7528\u4e8e\u5ef6\u8fdf\u6267\u884c\u4e00\u4e2a\u51fd\u6570\uff0c\u76f4\u5230\u5f53\u524d\u51fd\u6570\u8fd4\u56de\u3002\u6700\u8fd1\uff0c\u6709\u8bb8\u591a\u65b0\u624b\u5f00\u53d1\u8005\u5bf9 defer \u7684\u8f93\u51fa\u987a\u5e8f\u63d0\u51fa\u4e86\u7591\u95ee\uff0c\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u8fd9\u4e00\u95ee\u9898\u3002,
\n\u95ee\u9898\uff1a<\/strong>,\u4e3a\u4ec0\u4e48\u4ee5\u4e0b\u4ee3\u7801\u4e2d\u7684 defer \u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1f,
\n\u7b54\u6848\uff1a<\/strong>,\u8981\u7406\u89e3\u8f93\u51fa\u987a\u5e8f\uff0c\u9700\u8981\u9075\u5faa\u4ee5\u4e0b\u539f\u5219\uff1a,\u6309\u7167\u4ee3\u7801\u987a\u5e8f\uff0c\u9010\u884c\u89e3\u91ca\u5982\u4e0b\uff1a,\u56e0\u6b64\uff0c\u8f93\u51fa\u987a\u5e8f\u4e3a 2\u30011\u30011\u3002,\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8eGOLANG\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~,defer \u6ce8\u518c\u8981\u5ef6\u8fdf\u6267\u884c\u7684\u51fd\u6570\u65f6\uff0c\u8be5\u51fd\u6570\u7684\u6240\u6709\u53c2\u6570\u90fd\u9700\u8981\u786e\u5b9a\u5176\u503c\u3002,defer \u51fd\u6570\u540e\u8fdb\u5148\u51fa,\u6df1\u5165\u7406\u89e3 go \u8bed\u8a00\u4e2d defer \u8f93\u51fa\u7684\u5965\u79d8,GOLANG\u4eca\u5929\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765
\n\u300aGo \u8bed\u8a00\u4e2d defer \u7684\u8f93\u51fa\u987a\u5e8f\uff1a\u4e3a\u4f55\u8f93\u51fa\u7ed3\u679c\u4e3a 2\u30011\u30011\uff1f\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230
\n<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u662f\u6b63\u5728\u5b66\u4e60
\nGOLANG<\/span>\u6216\u8005\u5df2\u7ecf\u662f\u5927\u4f6c\u7ea7\u522b\u4e86\uff0c\u90fd\u975e\u5e38\u6b22\u8fce\u4e5f\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u7ed9\u6211\u5efa\u8bae\u8bc4\u8bba\u54c8~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff01,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u8bed\u8a00\u4e2d defer \u7684\u8f93\u51fa\u987a\u5e8f\uff1a\u4e3a\u4f55\u8f93\u51fa\u7ed3\u679c\u4e3a 2\u30011\u30011\uff1f<\/span><\/p>\n

Go \u8bed\u8a00\u4e2d defer \u7684\u8f93\u51fa\u987a\u5e8f\uff1a\u4e3a\u4f55\u8f93\u51fa\u7ed3\u679c\u4e3a 2\u30011\u30011\uff1f<\/h1>\n

2024-11-20 14:09:57<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

GOLANG\u4eca\u5929\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u300aGo \u8bed\u8a00\u4e2d defer \u7684\u8f93\u51fa\u987a\u5e8f\uff1a\u4e3a\u4f55\u8f93\u51fa\u7ed3\u679c\u4e3a 2\u30011\u30011\uff1f\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u662f\u6b63\u5728\u5b66\u4e60GOLANG<\/span>\u6216\u8005\u5df2\u7ecf\u662f\u5927\u4f6c\u7ea7\u522b\u4e86\uff0c\u90fd\u975e\u5e38\u6b22\u8fce\u4e5f\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u7ed9\u6211\u5efa\u8bae\u8bc4\u8bba\u54c8~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff01<\/p>\n

<\/p>\n

\u6df1\u5165\u7406\u89e3 go \u8bed\u8a00\u4e2d defer \u8f93\u51fa\u7684\u5965\u79d8<\/strong><\/p>\n

\u5728 go \u8bed\u8a00\u4e2d\uff0cdefer \u5173\u952e\u5b57\u7528\u4e8e\u5ef6\u8fdf\u6267\u884c\u4e00\u4e2a\u51fd\u6570\uff0c\u76f4\u5230\u5f53\u524d\u51fd\u6570\u8fd4\u56de\u3002\u6700\u8fd1\uff0c\u6709\u8bb8\u591a\u65b0\u624b\u5f00\u53d1\u8005\u5bf9 defer \u7684\u8f93\u51fa\u987a\u5e8f\u63d0\u51fa\u4e86\u7591\u95ee\uff0c\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u8fd9\u4e00\u95ee\u9898\u3002<\/p>\n

\u95ee\u9898\uff1a<\/strong><\/p>\n

\u4e3a\u4ec0\u4e48\u4ee5\u4e0b\u4ee3\u7801\u4e2d\u7684 defer \u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1f<\/p>\n

package main\n\nimport \"fmt\"\n\nfunc main() {\n    a := 1\n    defer fmt.Println(a)\n    defer func(a int) { fmt.Println(a) }(a)\n    defer func() { fmt.Println(a) }()\n    a++\n}<\/pre>\n
\u7b54\u6848\uff1a<\/strong><\/p>\n
\u8981\u7406\u89e3\u8f93\u51fa\u987a\u5e8f\uff0c\u9700\u8981\u9075\u5faa\u4ee5\u4e0b\u539f\u5219\uff1a<\/p>\n
    \n
  • defer \u51fd\u6570\u540e\u8fdb\u5148\u51fa<\/li>\n
  • defer \u6ce8\u518c\u8981\u5ef6\u8fdf\u6267\u884c\u7684\u51fd\u6570\u65f6\uff0c\u8be5\u51fd\u6570\u7684\u6240\u6709\u53c2\u6570\u90fd\u9700\u8981\u786e\u5b9a\u5176\u503c\u3002<\/li>\n<\/ul>\n
    \u6309\u7167\u4ee3\u7801\u987a\u5e8f\uff0c\u9010\u884c\u89e3\u91ca\u5982\u4e0b\uff1a<\/p>\n
      \n
    1. \u6ce8\u518c defer \u65e0\u53c2\u51fd\u6570\uff1a
      \u4e0d\u5206\u914d\u65b0\u7684\u5185\u5b58\uff0c\u76f4\u63a5\u4f7f\u7528\u5f53\u524d\u51fd\u6570\u5185\u7684\u53c2\u6570\u3002<\/li>\n
    2. \u6ce8\u518c defer \u5355\u53c2\u51fd\u6570\uff08a int\uff09\uff1a
      \u5206\u914d\u65b0\u7684\u5185\u5b58\u4ee5\u5b58\u50a8\u5b9e\u53c2 a=1\u3002<\/li>\n
    3. \u6ce8\u518c defer \u5355\u53c2\u51fd\u6570\uff08a int\uff09\uff1a
      \u5206\u914d\u65b0\u7684\u5185\u5b58\u4ee5\u5b58\u50a8\u5b9e\u53c2 a=1\u3002<\/li>\n
    4. \u6267\u884c a++\uff1a
      \u5c06 a \u7684\u503c\u589e\u52a0\u5230 2\u3002<\/li>\n
    5. \n
      \u6267\u884c defer \u4e09\u4e8c\u4e00\u987a\u5e8f\uff1a<\/p>\n
        \n
      • \u4e09\uff1a\u6253\u5370\u5b9e\u53c2 a=1<\/li>\n
      • \u4e8c\uff1a\u6253\u5370\u5b9e\u53c2 a=1<\/li>\n
      • \u4e00\uff1a\u6253\u5370\u5f53\u524d\u51fd\u6570\u53c2\u6570 a=2<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
        \u56e0\u6b64\uff0c\u8f93\u51fa\u987a\u5e8f\u4e3a 2\u30011\u30011\u3002<\/p>\n
        \u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8eGOLANG\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n
        \n
        \n <\/dt>\n
        \n   2027 \u6b3e\u6885\u8d5b\u5fb7\u65af GLC \u7535\u52a8\u8f7f\u8dd1 SUV \u8def\u6d4b\u7167\u66dd\u5149\uff1a\u5168\u65b0\u524d\u8138\u8bbe\u8ba1\n <\/dd>\n<\/dl>\n
        \n
        \n <\/dt>\n
        \n   \u82f9\u679c\u7535\u8111\u5982\u4f55\u4f7f\u7528\u5185\u7f51u\u76d8\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        GOLANG\u4eca\u5929\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765 \u300a...<\/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-206712","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206712","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=206712"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206712\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}