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# Google Style Guides
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2018-01-31 01:36:50 +08:00
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Every major open-source project has its own style guide: a set of conventions
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(sometimes arbitrary) about how to write code for that project. It is much
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easier to understand a large codebase when all the code in it is in a
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consistent style.
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“Style” covers a lot of ground, from “use camelCase for variable names” to
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“never use global variables” to “never use exceptions.” This project
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([google/styleguide](https://github.com/google/styleguide)) links to the
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style guidelines we use for Google code. If you are modifying a project that
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originated at Google, you may be pointed to this page to see the style guides
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that apply to that project.
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This project holds the [C++ Style Guide][cpp], [C# Style Guide][csharp],
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[Swift Style Guide][swift], [Objective-C Style Guide][objc],
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[Java Style Guide][java], [Python Style Guide][py], [R Style Guide][r],
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[Shell Style Guide][sh], [HTML/CSS Style Guide][htmlcss],
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[JavaScript Style Guide][js], [TypeScript Style Guide][ts], [AngularJS Style Guide][angular],
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[Common Lisp Style Guide][cl], and [Vimscript Style Guide][vim]. This project
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also contains [cpplint][cpplint], a tool to assist with style guide compliance,
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and [google-c-style.el][emacs], an Emacs settings file for Google style.
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If your project requires that you create a new XML document format, the [XML
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Document Format Style Guide][xml] may be helpful. In addition to actual style
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rules, it also contains advice on designing your own vs. adapting an existing
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format, on XML instance document formatting, and on elements vs. attributes.
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The style guides in this project are licensed under the CC-By 3.0 License,
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which encourages you to share these documents.
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See [https://creativecommons.org/licenses/by/3.0/][ccl] for more details.
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The following Google style guides live outside of this project:
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[Go Code Review Comments][go] and [Effective Dart][dart].
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2021-04-09 02:08:23 +08:00
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## Contributing
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With few exceptions, these style guides are copies of Google's internal style guides
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to assist developers working on Google owned and originated open source projects.
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Changes to the style guides are made to the internal style guides first and
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eventually copied into the versions found here.
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Pull requests are regularly closed without comment.
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Issues that raise questions, justify changes on technical merits,
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or point out obvious mistakes may get some engagement and could in theory lead to changes,
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but we are primarily optimizing for Google's internal needs.
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<a rel="license" href="https://creativecommons.org/licenses/by/3.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/3.0/88x31.png" /></a>
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[cpp]: https://google.github.io/styleguide/cppguide.html
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[csharp]: https://google.github.io/styleguide/csharp-style.html
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[swift]: https://google.github.io/swift/
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[objc]: objcguide.md
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[java]: https://google.github.io/styleguide/javaguide.html
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[py]: https://google.github.io/styleguide/pyguide.html
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[r]: https://google.github.io/styleguide/Rguide.html
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[sh]: https://google.github.io/styleguide/shellguide.html
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[htmlcss]: https://google.github.io/styleguide/htmlcssguide.html
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[js]: https://google.github.io/styleguide/jsguide.html
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[ts]: https://google.github.io/styleguide/tsguide.html
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[angular]: https://google.github.io/styleguide/angularjs-google-style.html
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[cl]: https://google.github.io/styleguide/lispguide.xml
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[vim]: https://google.github.io/styleguide/vimscriptguide.xml
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[cpplint]: https://github.com/google/styleguide/tree/gh-pages/cpplint
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[emacs]: https://raw.githubusercontent.com/google/styleguide/gh-pages/google-c-style.el
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[xml]: https://google.github.io/styleguide/xmlstyle.html
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[go]: https://golang.org/wiki/CodeReviewComments
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[dart]: https://www.dartlang.org/guides/language/effective-dart
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[ccl]: https://creativecommons.org/licenses/by/3.0/
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