{"id":206364,"date":"2025-06-12T09:28:19","date_gmt":"2025-06-12T01:28:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/206364\/"},"modified":"2025-06-12T09:28:19","modified_gmt":"2025-06-12T01:28:19","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-golang-flag-%e5%8c%85%e5%88%a4%e6%96%ad%e5%ad%90%e5%91%bd%e4%bb%a4%e4%b8%ad%e7%9a%84%e5%ae%9e%e9%99%85%e8%be%93%e5%85%a5-flag%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/206364\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 Golang flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 Flag\uff1f"},"content":{"rendered":"<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762GOLANG\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGOLANG\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u5982\u4f55\u4f7f\u7528 GOLANG flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 Flag\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01,<br \/>\n<img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241110\/173123337867308662e1c8e.jpg\" class=\"aligncenter\">,<br \/>\n<strong>\u4f7f\u7528 golang flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 flag<\/strong>,\u5f53\u4e00\u4e2a\u5b50\u547d\u4ee4\u6709\u591a\u4e2a flag \u65f6\uff0c\u6211\u4eec\u9700\u8981\u533a\u5206\u53ea\u8f93\u5165\u7279\u5b9a flag \u7684\u573a\u666f\u3002\u672c\u6587\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528 flag \u5305\u7684 visit() \u65b9\u6cd5\u786e\u5b9a\u5b9e\u9645\u8f93\u5165\u7684 flag\u3002,\u9996\u5148\uff0c\u521b\u5efa\u5b50\u547d\u4ee4\u7684 flag \u96c6\u5408\uff1a,\u89e3\u6790\u547d\u4ee4\u884c\u53c2\u6570\uff1a,\u904d\u5386\u5b9a\u4e49\u597d\u7684 flag\uff1a,\u904d\u5386\u5b9e\u9645\u8f93\u5165\u7684 flag\uff1a,\u901a\u8fc7\u904d\u5386\uff0c\u6211\u4eec\u53ef\u4ee5\u5224\u65ad\u662f\u5426\u53ea\u8f93\u5165\u4e86\u7279\u5b9a flag\uff0c\u4ece\u800c\u5b9e\u73b0\u4e0d\u540c\u7684\u529f\u80fd\u3002,\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u6f14\u793a\u4e86\u5224\u65ad\u53ea\u8f93\u5165\u4e86 a flag \u7684\u573a\u666f\uff1a,\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u5982\u4f55\u4f7f\u7528 GOLANG flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 Flag\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,\u4f7f\u7528 golang flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 flag,\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762GOLANG\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGOLANG\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u5982\u4f55\u4f7f\u7528 GOLANG flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 Flag\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01,<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>\u5982\u4f55\u4f7f\u7528 GOLANG flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 Flag\uff1f<\/span><\/p>\n<h1>\u5982\u4f55\u4f7f\u7528 GOLANG flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 Flag\uff1f<\/h1>\n<p><span>2024-11-10 18:09:54<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762GOLANG\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2aGOLANG\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u5982\u4f55\u4f7f\u7528 GOLANG flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 Flag\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241110\/173123337867308662e1c8e.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u4f7f\u7528 golang flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 flag<\/strong><\/p>\n<p>\u5f53\u4e00\u4e2a\u5b50\u547d\u4ee4\u6709\u591a\u4e2a flag \u65f6\uff0c\u6211\u4eec\u9700\u8981\u533a\u5206\u53ea\u8f93\u5165\u7279\u5b9a flag \u7684\u573a\u666f\u3002\u672c\u6587\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528 flag \u5305\u7684 visit() \u65b9\u6cd5\u786e\u5b9a\u5b9e\u9645\u8f93\u5165\u7684 flag\u3002<\/p>\n<p>\u9996\u5148\uff0c\u521b\u5efa\u5b50\u547d\u4ee4\u7684 flag \u96c6\u5408\uff1a<\/p>\n<pre>foocmd := flag.newflagset(\"foo\", flag.exitonerror)\nfooa := foocmd.string(\"a\", \"0\", \"a\")\nfoob := foocmd.string(\"b\", \"0\", \"b\")<\/pre>\n<p>\u89e3\u6790\u547d\u4ee4\u884c\u53c2\u6570\uff1a<\/p>\n<pre>foocmd.parse(os.args[2:])<\/pre>\n<p>\u904d\u5386\u5b9a\u4e49\u597d\u7684 flag\uff1a<\/p>\n<pre>foocmd.visitall(func(f *flag.flag) {\n    \/\/ ... \u5224\u65ad\u903b\u8f91\n})<\/pre>\n<p>\u904d\u5386\u5b9e\u9645\u8f93\u5165\u7684 flag\uff1a<\/p>\n<pre>foocmd.visit(func(f *flag.flag) {\n    \/\/ ... \u5224\u65ad\u903b\u8f91\n})<\/pre>\n<p>\u901a\u8fc7\u904d\u5386\uff0c\u6211\u4eec\u53ef\u4ee5\u5224\u65ad\u662f\u5426\u53ea\u8f93\u5165\u4e86\u7279\u5b9a flag\uff0c\u4ece\u800c\u5b9e\u73b0\u4e0d\u540c\u7684\u529f\u80fd\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u6f14\u793a\u4e86\u5224\u65ad\u53ea\u8f93\u5165\u4e86 a flag \u7684\u573a\u666f\uff1a<\/p>\n<pre>aFlagVisited := false\nfooCmd.Visit(func(f *flag.Flag) {\n    if f.Name == \"a\" {\n        aFlagVisited = true\n    }\n})\nif aFlagVisited &amp;&amp; !bFlagVisited {\n    A()\n}<\/pre>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u5982\u4f55\u4f7f\u7528 GOLANG flag \u5305\u5224\u65ad\u5b50\u547d\u4ee4\u4e2d\u7684\u5b9e\u9645\u8f93\u5165 Flag\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   Rust \u548c Go \u9700\u8981\u8fd0\u884c\u65f6\u73af\u5883\u5417\uff1f\n <\/dd>\n<\/dl>\n<dl>\n<dt>\n <\/dt>\n<dd>\n   2021\u5e74\u6700\u503c\u5f97\u8d2d\u4e70\u7684\u7b14\u8bb0\u672c\u7535\u8111\u63a8\u8350\u914d\u7f6e\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd&#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-206364","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206364","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=206364"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/206364\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=206364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=206364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=206364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}