{"id":208032,"date":"2025-07-08T12:28:32","date_gmt":"2025-07-08T04:28:32","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208032\/"},"modified":"2025-07-08T12:28:32","modified_gmt":"2025-07-08T04:28:32","slug":"%e5%bb%b6%e8%bf%9f%e5%91%bd%e5%90%8d%e8%bf%94%e5%9b%9e%e5%80%bc%e7%9a%84%e8%a1%8c%e4%b8%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208032\/","title":{"rendered":"\u5ef6\u8fdf\u547d\u540d\u8fd4\u56de\u503c\u7684\u884c\u4e3a"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5ef6\u8fdf\u547d\u540d\u8fd4\u56de\u503c\u7684\u884c\u4e3a<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-28 08:12:35<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u5ef6\u8fdf\u547d\u540d\u8fd4\u56de\u503c\u7684\u884c\u4e3a\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u5ef6\u8fdf\u51fd\u6570\u5728\u5468\u56f4\u51fd\u6570\u8fd4\u56de\u540e\u9012\u589e\u8fd4\u56de\u503c i\u3002\u56e0\u6b64\uff0c\u8be5\u51fd\u6570\u8fd4\u56de 2\uff1a<\/p>\n

func c() (i int) {\n    defer func() { i++ }()\n    return 1\n}<\/pre>\n
\u4e3a\u4ec0\u4e48\u4f1a\u8fd4\u56de 2\uff1f<\/p>\n
go \u535a\u5ba2\u5ef6\u8fdf\u3001\u6050\u614c\u548c\u6062\u590d<\/p>\n
 \u5ef6\u8fdf\u51fd\u6570\u53ef\u4ee5\u8bfb\u53d6\u5e76\u5206\u914d\u7ed9\u8fd4\u56de\u51fd\u6570\u7684\u547d\u540d\u8fd4\u56de\u503c\u3002 <\/p>\n
\u6211\u8ba4\u4e3a\u7a0b\u5e8f\u5458\u7684\u610f\u56fe\u662f\u8fd4\u56de 1 \u4f5c\u4e3a\u7ed3\u679c\uff0c\u5e76\u60f3\u77e5\u9053\u4e3a\u4ec0\u4e48\u5b83\u662f\u91cd\u5199\u7684\uff0c\u4ee5\u53ca\u80cc\u540e\u7684\u8bbe\u8ba1\u51b3\u7b56\u662f\u4ec0\u4e48\u3002<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u5ef6\u8fdf\u51fd\u6570\u5728\u8be5 return \u8bed\u53e5\u8bbe\u7f6e\u4efb\u4f55\u7ed3\u679c\u53c2\u6570\u4e4b\u540e\u4f46\u5728\u51fd\u6570\u8fd4\u56de\u5230\u5176\u8c03\u7528\u8005\u4e4b\u524d\u6267\u884c\u3002
 \u6267\u884c\u987a\u5e8f\uff1a<\/p>\n
func c() (i int) { \/\/ i = 0\n    defer func() { i++ }()\n    return 1  \/\/ i = 1\n \/\/ run deferred function here i++ => i = 2\n}<\/pre>\n
\u67e5\u770b defer<\/code> \u5173\u952e\u5b57\u7684 \u3002<\/p>\n
\u53c2\u89c1\uff1a<\/p>\n
lock(l)\ndefer unlock(l)  \/\/ unlocking happens before surrounding function returns\n\n\/\/ prints 3 2 1 0 before surrounding function returns\nfor i := 0; i <= 3; i++ {\n    defer fmt.Print(i)\n}\n\n\/\/ f returns 42\nfunc f() (result int) {\n    defer func() {\n        \/\/ result is accessed after it was set to 6 by the return statement\n        result *= 7\n    }()\n    return 6\n}<\/pre>\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\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/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-208032","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208032","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=208032"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208032\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208032"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208032"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208032"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}