{"id":207896,"date":"2025-07-08T10:27:42","date_gmt":"2025-07-08T02:27:42","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207896\/"},"modified":"2025-07-08T10:27:42","modified_gmt":"2025-07-08T02:27:42","slug":"%e6%a3%80%e6%9f%a5-go-%e7%b1%bb%e5%9e%8b%e6%98%af%e5%90%a6%e5%bd%b1%e5%ad%90-%e5%ae%9e%e7%8e%b0%e4%ba%86%e5%b5%8c%e5%85%a5%e7%b1%bb%e5%9e%8b%e6%8e%a5%e5%8f%a3%e7%9a%84%e4%b8%80%e9%a1%b9%e5%8a%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207896\/","title":{"rendered":"\u68c0\u67e5 Go \u7c7b\u578b\u662f\u5426\u5f71\u5b50\/\u5b9e\u73b0\u4e86\u5d4c\u5165\u7c7b\u578b\u63a5\u53e3\u7684\u4e00\u9879\u529f\u80fd"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u68c0\u67e5 Go \u7c7b\u578b\u662f\u5426\u5f71\u5b50\/\u5b9e\u73b0\u4e86\u5d4c\u5165\u7c7b\u578b\u63a5\u53e3\u7684\u4e00\u9879\u529f\u80fd<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-26 15:09:38<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4f60\u5728\u5b66\u4e60Golang<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300a\u68c0\u67e5 Go \u7c7b\u578b\u662f\u5426\u5f71\u5b50\/\u5b9e\u73b0\u4e86\u5d4c\u5165\u7c7b\u578b\u63a5\u53e3\u7684\u4e00\u9879\u529f\u80fd\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n

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

type a interface {\n  myfunc()\n}\n\ntype a struct {\n}\n\nfunc (a *a) myfunc() {...}\n \ntype b struct {\n  *a\n}\nvar _ a = &b{}\nvar _ a = (*b)(nil)<\/pre>\n
\u7531\u4e8e\u5d4c\u5165\u4e86 a\uff0cb \u5b9e\u73b0\u4e86\u63a5\u53e3 a\u3002\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u4e00\u5207\u987a\u5229\u3002<\/p>\n
\u4f46\u662f\u6211\u5982\u4f55\u68c0\u67e5\uff08\u9759\u6001\u6216\u5728\u8fd0\u884c\u65f6\uff09b \u662f\u5426\u5b9e\u73b0\u4e86\u81ea\u5df1\u7684 myfunc<\/code> \u7248\u672c\uff1f<\/p>\n
\u66f4\u65b0\uff1a\u65e0\u6cd5\u5728\u7f16\u8bd1\u65f6\u9759\u6001\u68c0\u67e5\u8fd9\u4e00\u70b9\u3002<\/p>\n
func (b *B) MyFunc() {...}\nvar _ ??? = &B{}\nvar _ ??? = (*B)(nil)<\/pre>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
tl;dr<\/em>\u4f60\u4e0d\u80fd\uff0c\u56e0\u4e3a@JimB\u63d0\u5230\u7684\u539f\u56e0\u3002<\/p>\n
\u56de\u590d\u60a8\u6700\u8fd1\u7684\u8bc4\u8bba\uff1a \u201c\u6211\u53ea\u662f\u60f3\u786e\u4fdd\u6846\u67b6\u7684\u7528\u6237\u83b7\u5f97\u4e00\u4e9b\u5173\u4e8e\u5982\u4f55\u6700\u597d\u5730\u4f7f\u7528\u754c\u9762\u7684\u63d0\u793a\u3002\u201d<\/em><\/p>\n
\u5982\u679c\u6211\u7684\u76ee\u6807\u662f\u5411\u6211\u7684\u7528\u6237\u5efa\u8bae\u6700\u4f73\u5b9e\u8df5\uff0c\u6211\u53ea\u4f1a\u5728\u67d0\u4e2a\u5730\u65b9\u8bb0\u5f55\u5b83\u3002\u662f\u7684\uff0c\u6709\u8fd9\u6837\u4e00\u4e2a\u795e\u8bdd\uff0c\u6ca1\u6709\u4eba\u9605\u8bfb\u6587\u6863\uff0c\u4f46\u65e0\u8bba\u5982\u4f55\uff0c\u5982\u679c\u60a8\u5141\u8bb8 B<\/code> \u4e0e A<\/code> \u7ec4\u5408\uff0c\u90a3\u4e48\u60a8\u7684\u8bbe\u8ba1\u7684\u8bed\u4e49\u6b63\u662f\u201cB \u53ef\u4ee5\u5177\u6709 A \u7684\u884c\u4e3a\u201d\u3002\u56e0\u6b64\uff0c\u8b66\u544a\u7528\u6237\u8fd9\u4e00\u70b9\u662f\u6ca1\u6709\u610f\u4e49\u7684\u3002\u8fd9\u5c31\u50cf\u60a8\u7ed9\u5ba2\u6237\u4e00\u628a\u9524\u5b50\u5e76\u8bf4\u201c\u8bb0\u4f4f\uff0c\u8fd9\u662f\u4e00\u628a B \u578b\u9524\u5b50\u201d\u3002\u597d\u5427\uff0c\u5b83\u4ecd\u7136\u662f\u4e00\u628a\u9524\u5b50\u3002\u5982\u679c\u60a8\u60f3\u8d4b\u4e88\u5ba2\u6237\u51fb\u4e2d\u9489\u5b50\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u4ed6\u4eec\u4ece\u54ea\u91cc\u5f97\u5230\u9524\u5b50\uff0c\u4ee5\u53ca\u4efb\u4f55\u76f8\u5173\u7684\u8b66\u544a\uff0c\u90fd\u4e0d\u662f\u91cd\u70b9\u3002<\/p>\n
\u81f3\u4e8e\u6280\u672f\u7ec6\u8282\uff1a<\/p>\n
\u7c7b\u578b\u7684\u65b9\u6cd5\u96c6\u5c31\u662f\u7f16\u8bd1\u5668\u786e\u5b9a\u8be5\u7c7b\u578b\u662f\u5426\u6ee1\u8db3\u63a5\u53e3\u6240\u9700\u7684\u5168\u90e8\u5185\u5bb9\u3002\u8fd9\u4e9b\u65b9\u6cd5\u5982\u4f55\u5230\u8fbe\u90a3\u91cc\u5e76\u4e0d\u91cd\u8981\u3002<\/p>\n
\u4e0d\u5e78\u7684\u662f\uff0cGo \u89c4\u8303\u5728\u8fd9\u4e00\u70b9\u4e0a\u5e76\u4e0d\u662f\u975e\u5e38\u7b80\u5355\uff0c\u4f46\u53ef\u4ee5\u62fc\u51d1\u51fa\u4e00\u4e2a\u89e3\u91ca\u3002<\/p>\n
\u5408\u6cd5\u9009\u62e9\u5668\uff1a<\/p>\n
\u90a3\u4e48 b.MyFunc<\/code> \u662f\u5408\u6cd5\u7684\u9009\u62e9\u5668\u5417\uff1f\u662f\u7684\uff0c\u56e0\u4e3a\u5b83\u5f15\u7528\u4e86\u5d4c\u5165\u7ed3\u6784\u7684\u65b9\u6cd5\u3002\u8fd9\u79cd\u65b9\u6cd5\u79f0\u4e3a\u63d0\u5347<\/em>\u3002\u7136\u540e\uff1a<\/p>\n
\u6700\u540e\uff1a<\/p>\n
\u8fd9\u5c31\u662f\u60a8\u53ef\u4ee5\u4ece\u89c4\u683c\u4e2d\u83b7\u5f97\u7684\u5168\u90e8\u4fe1\u606f\u3002\u6ca1\u6709\u63d0\u53ca\u4e3a\u4ec0\u4e48\u6216\u5982\u4f55\u5c06\u65b9\u6cd5\u5305\u542b\u5728\u65b9\u6cd5\u96c6\u4e2d\u4e3a\u4e86\u6ee1\u8db3\u63a5\u53e3<\/em>\u3002<\/p>\n
\u73b0\u5728\u552f\u4e00\u7684\u9644\u52a0\u4fe1\u606f\u662f\uff0c\u5f53 B<\/code> \u5728\u5176\u65b9\u6cd5\u96c6\u4e2d\u76f4\u63a5\u6216\u901a\u8fc7\u5d4c\u5165 A<\/code> \u786e\u5b9e\u6709 MyFunc<\/code> \u65f6\uff0c\u5982\u679c\u60a8\u8c03\u7528 b.MyFunc<\/code>\uff0c\u5219 B<\/code> \u7684\u5b9e\u73b0\u4f1a\u7531\u4e8e\u6df1\u5ea6<\/em>\u89c4\u5219\u800c\u8fd0\u884cwhich is a formal way to, substantially, define a behavior similar to what in OOP is overriding: a selector x.f<\/code> denotes f<\/code> at the shallowest depth, and when f<\/code> results from embedding a type A<\/code>, its depth is its depth in A<\/code>+ 1\uff0c\u800c\u76f4\u63a5\u58f0\u660e\u7684\u65b9\u6cd5\u6df1\u5ea6\u4e3a0\u3002<\/p>\n
\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u68c0\u67e5 Go \u7c7b\u578b\u662f\u5426\u5f71\u5b50\/\u5b9e\u73b0\u4e86\u5d4c\u5165\u7c7b\u578b\u63a5\u53e3\u7684\u4e00\u9879\u529f\u80fd\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/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-207896","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207896","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=207896"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207896\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}