{"id":206716,"date":"2025-06-12T10:00:50","date_gmt":"2025-06-12T02:00:50","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206716\/"},"modified":"2025-06-12T10:00:50","modified_gmt":"2025-06-12T02:00:50","slug":"go-%e8%af%ad%e8%a8%80%e4%b8%ad-return-%e5%92%8c-defer-%e7%9a%84%e4%ba%a4%e4%ba%92%ef%bc%9a%e4%b8%ba%e4%bb%80%e4%b9%88-f0-%e8%bf%94%e5%9b%9e-1-%e8%80%8c-f1-%e8%bf%94%e5%9b%9e-0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206716\/","title":{"rendered":"Go \u8bed\u8a00\u4e2d return \u548c defer \u7684\u4ea4\u4e92\uff1a\u4e3a\u4ec0\u4e48 f0 \u8fd4\u56de 1 \u800c f1 \u8fd4\u56de 0\uff1f"},"content":{"rendered":"

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587
\n\u300aGo \u8bed\u8a00\u4e2d return \u548c defer \u7684\u4ea4\u4e92\uff1a\u4e3a\u4ec0\u4e48 f0 \u8fd4\u56de 1 \u800c f1 \u8fd4\u56de 0\uff1f\u300b<\/span>\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230
\n<\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60
\nGOLANG<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a
\nGOLANG<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~,
\n,
\n\u63ed\u79d8 go \u8bed\u8a00 return \u4e0e defer \u7684\u4ea4\u4e92<\/strong>,\u5728 go \u8bed\u8a00\u4e2d\uff0creturn \u548c defer \u4e24\u4e2a\u5173\u952e\u5b57\u7ecf\u5e38\u4f1a\u8ba9\u4eba\u611f\u5230\u56f0\u60d1\uff0c\u7279\u522b\u662f\u5f53\u5b83\u4eec\u4e00\u8d77\u4f7f\u7528\u65f6\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u8fd9\u4e24\u8005\u4e4b\u95f4\u7684\u4ea4\u4e92\uff0c\u4ee5\u89e3\u5f00\u5b83\u4eec\u7684\u7591\u60d1\u3002,
\n\u95ee\u9898\uff1a<\/strong>,\u5728\u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u4e2d\uff1a,
\n\u7b54\u6848\uff1a<\/strong>,
\n\u8981\u70b9\uff1a<\/strong>,\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301GOLANG\uff01\u66f4\u591a\u5173\u4e8eGOLANG\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\u3002,<\/p>\n

\u95ee\u9898 2\uff1a<\/strong><\/p>\n

go \u8bed\u8a00\u4e2d\u6ca1\u6709 null\u3002\u5728 f1() \u4e2d\uff0c\u6ca1\u6709\u5bf9 result \u8fdb\u884c\u4efb\u4f55\u8d4b\u503c\uff0c\u56e0\u6b64\u5b83\u5c06\u4fdd\u7559\u5176\u9ed8\u8ba4\u503c 0\u3002int \u7c7b\u578b\u7684\u9ed8\u8ba4\u503c\u4e3a 0\uff0c\u56e0\u6b64 f1() \u8fd4\u56de 0\u3002<\/p>\n

,<\/p>\n

\u95ee\u9898 1\uff1a<\/strong><\/p>\n

\u5728 go \u8bed\u8a00\u4e2d\uff0cdefer \u5ef6\u8fdf\u8c03\u7528\u4f1a\u5148\u4e8e return \u6267\u884c\u3002\u56e0\u6b64\uff0c\u5728 f0() \u4e2d\uff0c\u533f\u540d\u51fd\u6570\uff08defer\uff09\u4f1a\u5728 return 0 \u4e4b\u540e\u6267\u884c\uff0c\u4ece\u800c\u5c06 result \u589e\u52a0 1\u3002\u7531\u4e8e result \u662f\u4e00\u4e2a\u51fd\u6570\u8fd4\u56de\u503c\uff0c\u56e0\u6b64\u5176\u503c\u4f1a\u66f4\u65b0\u4e3a 1\u3002<\/p>\n

,\u4e3a\u4ec0\u4e48 f1 \u8fd4\u56de\u7684\u662f 0\uff0c\u800c\u4e0d\u662f null\uff1f,\u4e3a\u4ec0\u4e48 f0 \u8fd4\u56de\u7684\u662f 1\uff0c\u800c\u4e0d\u662f 0\uff1f,\u63ed\u79d8 go \u8bed\u8a00 return \u4e0e defer \u7684\u4ea4\u4e92,\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587
\n\u300aGo \u8bed\u8a00\u4e2d return \u548c defer \u7684\u4ea4\u4e92\uff1a\u4e3a\u4ec0\u4e48 f0 \u8fd4\u56de 1 \u800c f1 \u8fd4\u56de 0\uff1f\u300b<\/span>\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230
\n<\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60
\nGOLANG<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a
\nGOLANG<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Go \u8bed\u8a00\u4e2d return \u548c defer \u7684\u4ea4\u4e92\uff1a\u4e3a\u4ec0\u4e48 f0 \u8fd4\u56de 1 \u800c f1 \u8fd4\u56de 0\uff1f<\/span><\/p>\n

Go \u8bed\u8a00\u4e2d return \u548c defer \u7684\u4ea4\u4e92\uff1a\u4e3a\u4ec0\u4e48 f0 \u8fd4\u56de 1 \u800c f1 \u8fd4\u56de 0\uff1f<\/h1>\n

2024-11-20 16:27:57<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u300aGo \u8bed\u8a00\u4e2d return \u548c defer \u7684\u4ea4\u4e92\uff1a\u4e3a\u4ec0\u4e48 f0 \u8fd4\u56de 1 \u800c f1 \u8fd4\u56de 0\uff1f\u300b<\/span>\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60GOLANG<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591aGOLANG<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

<\/p>\n

\u63ed\u79d8 go \u8bed\u8a00 return \u4e0e defer \u7684\u4ea4\u4e92<\/strong><\/p>\n

\u5728 go \u8bed\u8a00\u4e2d\uff0creturn \u548c defer \u4e24\u4e2a\u5173\u952e\u5b57\u7ecf\u5e38\u4f1a\u8ba9\u4eba\u611f\u5230\u56f0\u60d1\uff0c\u7279\u522b\u662f\u5f53\u5b83\u4eec\u4e00\u8d77\u4f7f\u7528\u65f6\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u8fd9\u4e24\u8005\u4e4b\u95f4\u7684\u4ea4\u4e92\uff0c\u4ee5\u89e3\u5f00\u5b83\u4eec\u7684\u7591\u60d1\u3002<\/p>\n

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

\u5728\u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u4e2d\uff1a<\/p>\n

package main\n\nimport (\n    \"fmt\"\n)\n\nfunc main() {\n    fmt.Println(f0()) \/\/ 1\n    fmt.Println(f1()) \/\/ 0\n}\n\nfunc f0() (result int) {\n    defer func() {\n        result++\n    }()\n    return 0\n}\n\nfunc f1() (result int) {\n    result = 0 \/\/return\u8bed\u53e5\u4e0d\u662f\u4e00\u6761\u539f\u5b50\u8c03\u7528\uff0creturn xxx\u5176\u5b9e\u662f\u8d4b\u503c\uff0bRET\u6307\u4ee4\n    return\n}<\/pre>\n
    \n
  • \u4e3a\u4ec0\u4e48 f0 \u8fd4\u56de\u7684\u662f 1\uff0c\u800c\u4e0d\u662f 0\uff1f<\/li>\n
  • \u4e3a\u4ec0\u4e48 f1 \u8fd4\u56de\u7684\u662f 0\uff0c\u800c\u4e0d\u662f null\uff1f<\/li>\n<\/ul>\n
    \u7b54\u6848\uff1a<\/strong><\/p>\n
      \n
    • \n
      \u95ee\u9898 1\uff1a<\/strong><\/p>\n
      \u5728 go \u8bed\u8a00\u4e2d\uff0cdefer \u5ef6\u8fdf\u8c03\u7528\u4f1a\u5148\u4e8e return \u6267\u884c\u3002\u56e0\u6b64\uff0c\u5728 f0() \u4e2d\uff0c\u533f\u540d\u51fd\u6570\uff08defer\uff09\u4f1a\u5728 return 0 \u4e4b\u540e\u6267\u884c\uff0c\u4ece\u800c\u5c06 result \u589e\u52a0 1\u3002\u7531\u4e8e result \u662f\u4e00\u4e2a\u51fd\u6570\u8fd4\u56de\u503c\uff0c\u56e0\u6b64\u5176\u503c\u4f1a\u66f4\u65b0\u4e3a 1\u3002<\/p>\n<\/li>\n
    • \n
      \u95ee\u9898 2\uff1a<\/strong><\/p>\n
      go \u8bed\u8a00\u4e2d\u6ca1\u6709 null\u3002\u5728 f1() \u4e2d\uff0c\u6ca1\u6709\u5bf9 result \u8fdb\u884c\u4efb\u4f55\u8d4b\u503c\uff0c\u56e0\u6b64\u5b83\u5c06\u4fdd\u7559\u5176\u9ed8\u8ba4\u503c 0\u3002int \u7c7b\u578b\u7684\u9ed8\u8ba4\u503c\u4e3a 0\uff0c\u56e0\u6b64 f1() \u8fd4\u56de 0\u3002<\/p>\n<\/li>\n<\/ul>\n
      \u8981\u70b9\uff1a<\/strong><\/p>\n
        \n
      • \u7406\u89e3 defer \u6267\u884c\u7684\u65f6\u673a\u5bf9\u4e8e\u7406\u89e3\u5176\u4e0e return \u7684\u4ea4\u4e92\u81f3\u5173\u91cd\u8981\u3002<\/li>\n
      • \u5728 go \u8bed\u8a00\u4e2d\uff0cint \u7c7b\u578b\u9ed8\u8ba4\u503c\u4e3a 0\uff0c\u56e0\u6b64\u65e0\u9700\u624b\u52a8\u521d\u59cb\u5316\u3002<\/li>\n
      • \u907f\u514d\u6df7\u6dc6 return \u548c defer \u7684\u884c\u4e3a\uff0c\u56e0\u4e3a\u5b83\u4eec\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u8bed\u8a00\u7279\u6027\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301GOLANG\uff01\u66f4\u591a\u5173\u4e8eGOLANG\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\u3002<\/p>\n
        \n
        \n <\/dt>\n
        \n   Java\u521b\u5efa\u6587\u4ef6\u5939\u62a5\u9519\u201c\u65e0\u6cd5\u521b\u5efa\u6307\u5b9a\u6587\u4ef6\u8def\u5f84\u201d\uff1a\u5982\u4f55\u89e3\u51b3\uff1f\n <\/dd>\n<\/dl>\n
        \n
        \n <\/dt>\n
        \n   Win11\u600e\u4e48\u8bbe\u7f6e\u81ea\u52a8\u4eae\u5ea6\u8c03\u8282 Win11\u8bbe\u7f6e\u81ea\u52a8\u4eae\u5ea6\u8c03\u8282\u65b9\u6cd5\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        \u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587 \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-206716","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206716","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=206716"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206716\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}