{"id":207996,"date":"2025-07-08T08:01:29","date_gmt":"2025-07-08T00:01:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207996\/"},"modified":"2025-07-08T08:01:29","modified_gmt":"2025-07-08T00:01:29","slug":"%e4%bb%a3%e5%b8%81%e6%98%af%e5%90%a6%e5%ba%94%e8%af%a5%e6%88%90%e4%b8%ba-ast-%e8%8a%82%e7%82%b9%e7%9a%84%e4%b8%80%e9%83%a8%e5%88%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207996\/","title":{"rendered":"\u4ee3\u5e01\u662f\u5426\u5e94\u8be5\u6210\u4e3a AST \u8282\u70b9\u7684\u4e00\u90e8\u5206"},"content":{"rendered":"

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

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4ee3\u5e01\u662f\u5426\u5e94\u8be5\u6210\u4e3a AST \u8282\u70b9\u7684\u4e00\u90e8\u5206<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-27 18:48:47<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300a\u4ee3\u5e01\u662f\u5426\u5e94\u8be5\u6210\u4e3a AST \u8282\u70b9\u7684\u4e00\u90e8\u5206\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8eGolang<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span><\/p>\n

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

\u6211\u95ee\u8fd9\u4e2a\u95ee\u9898\u7684\u4e00\u4e9b\u80cc\u666f\u3002<\/h2>\n

\u6211\u6b63\u5728\u9605\u8bfb\u300awriting an interpreter in go\u300b\uff0c\u5728\u4e66\u4e2d\uff0ctoken<\/code> \u7ed3\u6784\u4f4d\u4e8e ast \u8282\u70b9\u5185\u90e8\u3002 node \u662f\u4e00\u79cd\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0 tokenliteral()<\/code> \u548c string()<\/code> \u6765\u5b9e\u73b0\u7684\u7c7b\u578b<\/p>\n

type integerliteral struct {\n    token token.token\n    value int64\n}\n\ntype node interface {\n    tokenliteral() string\n    string() string\n}\n<\/pre>\n
\u6211\u77e5\u9053\u5728\u73b0\u5b9e\u751f\u6d3b\u4e2d\uff0c\u7f16\u8bd1\u5668\u5fc5\u987b\u63d0\u4f9b\u9519\u8bef\u7684\u884c\u548c\u5217\u4f4d\u7f6e\uff0c\u800c\u8bcd\u6cd5\u5206\u6790\u5668\u65e0\u6cd5\u68c0\u6d4b\u5230\u9519\u8bef\uff0c\u56e0\u6b64\u5fc5\u987b\u5c06\u6b64\u4fe1\u606f\u4f20\u9012\u7ed9\u89e3\u6790\u5668\u3002\u4f8b\u5982\uff0cgo<\/code> \u7f16\u8bd1\u5668\u4f7f\u7528\u4e0b\u9762\u7684 ast \u8282\u70b9\u3002<\/p>\n
type Pos int\n\n\/\/ All node types implement the Node interface.\ntype Node interface {\n    Pos() token.Pos \/\/ position of first character belonging to the node\n    End() token.Pos \/\/ position of first character immediately after the node\n}\n<\/pre>\n
\u6211\u7684\u95ee\u9898\u7684\u957f\u7248\u672c<\/h2>\n
\u636e\u6211\u6240\u77e5\uff0c\u7f16\u8bd1\u524d\u7aef\u7684\u5de5\u4f5c\u65b9\u5f0f\u5982\u4e0b\uff1achars -> \u6807\u8bb0\u6d41 -> ast<\/code>\u3002\u5728\u6bcf\u4e2a\u7ea7\u522b\u4e2d\uff0c\u201c\u4e00\u4e9b\u4e8b\u7269\u201d\u90fd\u662f\u62bd\u8c61\u7684\u3002\u5728\u6211\u770b\u6765\uff0c token<\/code> \u4e0d\u5e94\u8be5\u662f ast node<\/code> \u7684\u4e00\u90e8\u5206<\/p>\n
    \n
  • \u4ee4\u724c\u662f\u5426\u5e94\u8be5\u662f ast node<\/code> \u7684\u4e00\u90e8\u5206<\/li>\n
  • \u60a8\u80fd\u5426\u4e3e\u4f8b\u8bf4\u660e pl \u9009\u62e9\u54ea\u79cd\u65b9\u5f0f<\/li>\n<\/ul>\n
     <\/p>\n
    \u6b63\u786e\u7b54\u6848<\/h2>\n
     <\/p>\n
    AST \u7684\u786e\u5207\u672c\u8d28\u662f\u7f16\u8bd1\u5668\uff08\u6216\u89e3\u6790\u5e93\uff09\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u4e0d\u540c\u7684 AST \u5b9e\u73b0\u5c06\u5177\u6709\u4e0d\u540c\u7684\u5b57\u6bb5\uff0c\u751a\u81f3\u540c\u4e00\u8bed\u8a00\u7684\u4e0d\u540c AST \u5b9e\u73b0\u4e5f\u662f\u5982\u6b64\u3002<\/p>\n
    \u51e0\u4e4e\u603b\u662f\u5b58\u5728\u67d0\u79cd\u673a\u5236\u4ece AST \u8282\u70b9\u63d0\u53d6\u6e90\u4f4d\u7f6e\u4fe1\u606f\uff0c\u5305\u62ec\u9519\u8bef\u6d88\u606f\u548c\u5d4c\u5165\u5728\u7f16\u8bd1\u8f93\u51fa\u4e2d\u7684\u8c03\u8bd5\u4fe1\u606f\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5411\u6bcf\u4e2a AST \u8282\u70b9\u7c7b\u578b\u6dfb\u52a0\u4e00\u4e2a\uff08\u6216\u591a\u4e2a\uff09\u4f4d\u7f6e\u5bf9\u8c61\u6765\u5b8c\u6210\u3002\u6216\u8005\uff0c\u4f4d\u7f6e\u4fe1\u606f\u53ef\u4ee5\u4fdd\u5b58\u5728\u53ef\u4ece AST \u8282\u70b9\u4ee5\u67d0\u79cd\u65b9\u5f0f\u53d1\u73b0\u7684\u4ee4\u724c\u5bf9\u8c61\u4e2d\u3002\u6216\u8005\u6df7\u5408\u4f7f\u7528\u8fd9\u4e9b\u7b56\u7565\u5e76\u63d0\u4f9b Location getter \u65b9\u6cd5\u3002<\/p>\n
    \u6211\u60f3\u4e0d\u51fa\u4e00\u4e2a\u597d\u7684\u7406\u7531\u6765\u575a\u6301\u6216\u7981\u6b62 AST \u4e2d\u7684\u4ee4\u724c\u5bf9\u8c61\u3002\u5f15\u7528\u5355\u4ee4\u724c\u6587\u5b57\u6216\u6807\u8bc6\u7b26\u7684 AST \u8282\u70b9\u5f88\u53ef\u80fd\u4fdd\u5b58\u5728 Token \u5bf9\u8c61\u4e2d\u3002\u4e3a\u4ec0\u4e48\u4e0d\u5462\uff1f<\/p>\n
    \u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u4ee3\u5e01\u662f\u5426\u5e94\u8be5\u6210\u4e3a AST \u8282\u70b9\u7684\u4e00\u90e8\u5206\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591aGolang\u77e5\u8bc6\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-207996","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207996","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=207996"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207996\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207996"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}