{"id":20270966,"url":"https://github.com/swiftdo/markup","last_synced_at":"2026-05-27T23:31:18.491Z","repository":{"id":133784181,"uuid":"357554985","full_name":"swiftdo/markup","owner":"swiftdo","description":"swift 字符解析大法","archived":false,"fork":false,"pushed_at":"2021-04-14T07:52:08.000Z","size":30,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":2,"default_branch":"main","last_synced_at":"2025-03-03T23:59:57.525Z","etag":null,"topics":["parser","swift"],"latest_commit_sha":null,"homepage":"","language":"Swift","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/swiftdo.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2021-04-13T13:01:44.000Z","updated_at":"2021-04-14T07:52:10.000Z","dependencies_parsed_at":null,"dependency_job_id":"1bf63c5b-f503-4a39-9b12-470ebe58013c","html_url":"https://github.com/swiftdo/markup","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/swiftdo/markup","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/swiftdo%2Fmarkup","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/swiftdo%2Fmarkup/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/swiftdo%2Fmarkup/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/swiftdo%2Fmarkup/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/swiftdo","download_url":"https://codeload.github.com/swiftdo/markup/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/swiftdo%2Fmarkup/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":33588345,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-26T15:22:16.424Z","status":"online","status_checked_at":"2026-05-27T02:00:06.184Z","response_time":53,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["parser","swift"],"created_at":"2024-11-14T12:35:21.651Z","updated_at":"2026-05-27T23:31:18.475Z","avatar_url":"https://github.com/swiftdo.png","language":"Swift","funding_links":[],"categories":[],"sub_categories":[],"readme":"## markup\n\n学习编译原理，用来练手的 Parser 小项目。\n\nparser 的工作即是将代码片段转换成计算机可读的数据结构的过程。这个“计算机可读的数据结构”更专业的说法是“抽象语法树（abstract syntax tree）”，简称AST。\nAST 是代码片段具体语义的抽象表达，它不包含该段代码的所有细节，比如缩进、换行这些细节，所以，我们可以使用 parser 转换出 AST。\n\n## Parser 的结构\n\n一般来说，一个 parser 会由两部分组成：\n\n* 词法解析器(lexer/scanner/tokenizer)\n* 对应语法的解释器（parser）\n\n在解释某段代码的时候，先由词法解释器将代码段转化成一个一个的词组流（token），再交由解释器对词组流进行语法解释，转化为对应语法的抽象解释，即是 AST 了。\n\n从根节点从上向下，不断递归，识别根节点的过程。这个解析的过程也被称为**递归下降解析器**。\n\n## 项目功能\n\n```\n\"The *quick*, ~red~ brown fox jumps over a _*lazy dog*_.\"\n```\n\n需要将此解析为：\n\n```\nThe \u003cstrong\u003equick\u003c/strong\u003e, \u003cdel\u003ered\u003c/del\u003e brown fox jumps over a \u003ci\u003e\u003cstrong\u003elazy dog\u003c/strong\u003e\u003c/i\u003e.\n```\n\n语法树：\n\n![](http://blog.loveli.site/mweb/16183814046437.jpg)\n\n\n## 参考\n* [Writing a Lightweight Markup Parser in Swift](https://medium.com/makingtuenti/writing-a-lightweight-markup-parser-in-swift-5c8a5f0f793f)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fswiftdo%2Fmarkup","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fswiftdo%2Fmarkup","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fswiftdo%2Fmarkup/lists"}