{"id":207706,"date":"2025-07-08T14:48:55","date_gmt":"2025-07-08T06:48:55","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207706\/"},"modified":"2025-07-08T14:48:55","modified_gmt":"2025-07-08T06:48:55","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-ast-%e8%a7%a3%e6%9e%90%e5%99%a8%e4%b8%ad%e5%b0%86%e7%b1%bb%e5%9e%8b%e8%a7%a3%e6%9e%90%e4%b8%ba%e5%8e%9f%e8%af%ad","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207706\/","title":{"rendered":"\u5982\u4f55\u5728 AST \u89e3\u6790\u5668\u4e2d\u5c06\u7c7b\u578b\u89e3\u6790\u4e3a\u539f\u8bed"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5982\u4f55\u5728 AST \u89e3\u6790\u5668\u4e2d\u5c06\u7c7b\u578b\u89e3\u6790\u4e3a\u539f\u8bed<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-24 20:18:32<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u79ef\u7d2f\u77e5\u8bc6\uff0c\u80dc\u8fc7\u79ef\u84c4\u91d1\u94f6\uff01\u6bd5\u7adf\u5728Golang\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u9047\u5230\u5404\u79cd\u5404\u6837\u7684\u95ee\u9898\uff0c\u5f80\u5f80\u90fd\u662f\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u6ca1\u6709\u638c\u63e1\u597d\u800c\u5bfc\u81f4\u7684\uff0c\u56e0\u6b64\u57fa\u7840\u77e5\u8bc6\u70b9\u7684\u79ef\u7d2f\u662f\u5f88\u91cd\u8981\u7684\u3002\u4e0b\u9762\u672c\u6587\u300a\u5982\u4f55\u5728 AST \u89e3\u6790\u5668\u4e2d\u5c06\u7c7b\u578b\u89e3\u6790\u4e3a\u539f\u8bed\u300b\uff0c\u5c31\u5e26\u5927\u5bb6\u8bb2\u89e3\u4e00\u4e0b\u77e5\u8bc6\u70b9\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/p>\n

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

\u6211\u60f3\u63d0\u53d6\u51fd\u6570\u7684\u7b7e\u540d\uff0c\u4ee5\u4fbf\u80fd\u591f\u5728\u5b83\u4eec\u4e0a\u751f\u6210\u4e00\u4e9b\u5305\u88c5\u65b9\u6cd5\u3002\u4e3a\u6b64\uff0c\u6211\u6b63\u5728\u4f7f\u7528 golang.org\/x\/tools\/go\/packages<\/code> \u8fd9\u4e3a\u6211\u63d0\u4f9b\u4e86\u9605\u8bfb ast \u7684\u53ef\u80fd\u6027\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5bf9\u4e8e\u51fd\u6570 func myfunc(param int)<\/code> \u5b9a\u4e49\uff0c\u60a8\u4f1a\u6536\u5230\u4e00\u4e9b<\/p>\n

ast.funcdecl{\n    type: *fieldlist{\n        list: []*field{\n            {\n                names: []*ident{ \/*...*\/ },\n                type:  nil, \/*...*\/\n            },\n        },\n    },\n}<\/pre>\n
\u5176\u4e2d type \u4ee3\u8868\u7c7b\u578b\u3002<\/p>\n
\u6211\u60f3\u4e3a\u6240\u6709 int<\/code> \u53c2\u6570\u751f\u6210\u4e00\u4e9b\u7279\u6b8a\u4ee3\u7801\uff0c\u4f46 int \u4e5f\u53ef\u4ee5\u901a\u8fc7\u67d0\u79cd\u7c7b\u578b\u58f0\u660e\u9690\u85cf<\/p>\n
type MyType int<\/pre>\n
\u5982\u4f55\u5c06 ast<\/code> \u7c7b\u578b\u8f6c\u6362\u4e3a\u7f16\u8bd1\u5668\u62e5\u6709\u7684\u771f\u5b9e\u7c7b\u578b\uff1f<\/p>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
\u5c06 \u548c \u6dfb\u52a0\u5230\u52a0\u8f7d\u6a21\u5f0f\u3002\u8fd9\u6837\uff0c\u6bcf\u4e2a\u52a0\u8f7d\u7684\u5305\u90fd\u4f1a\u521d\u59cb\u5316\u5176 \u5b57\u6bb5\uff0c\u5e76\u4e14\u8be5\u5b57\u6bb5\u7684\u7c7b\u578b \u6709\u4e00\u4e2a\u540d\u4e3a \u7684\u5b57\u6bb5\uff0c\u5b83\u5c06 ast \u8868\u8fbe\u5f0f\u6620\u5c04\u5230\u7c7b\u578b\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u4f7f\u7528\u5b83\uff1a<\/p>\n
func main() {\n    loadConfig := new(packages.Config)\n    loadConfig.Mode = packages.NeedSyntax | packages.NeedTypes | packages.NeedTypesInfo\n    loadConfig.Fset = token.NewFileSet()\n    pkgs, err := packages.Load(loadConfig, \"syscall\")\n    if err != nil {\n        panic(err)\n    }\n\n    for _, pkg := range pkgs {\n        for _, syn := range pkg.Syntax {\n            for _, dec := range syn.Decls {\n                if fd, ok := dec.(*ast.FuncDecl); ok && fd.Name.Name == \"Kill\" {\n                    x1 := fd.Type.Params.List[0].Type \/\/ int\n                    x2 := fd.Type.Params.List[1].Type \/\/ syscall.Signal\n\n                    tv1 := pkg.TypesInfo.Types[x1]\n                    tv2 := pkg.TypesInfo.Types[x2]\n\n                    if basic, ok := tv1.Type.(*types.Basic); ok {\n                        fmt.Printf(\"%#v\\n\", basic) \/\/ int\n                    }\n\n                    if named, ok := tv2.Type.(*types.Named); ok {\n                        fmt.Printf(\"%v\\n\", named.Obj())         \/\/ *types.TypeName (Signal)\n                        fmt.Printf(\"%#v\\n\", named.Underlying()) \/\/ *types.Basic (int)\n                    }\n                }\n            }\n        }\n    }\n}\n<\/pre>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u5982\u4f55\u5728 AST \u89e3\u6790\u5668\u4e2d\u5c06\u7c7b\u578b\u89e3\u6790\u4e3a\u539f\u8bed\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/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-207706","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207706","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=207706"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207706\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}