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doc: add C++ style comments to the style guide 

Adds instructions on how to format C++ comments to the C++ style guide,
as `cpplint.py` doesn't complain about C-style comments on the code.

PR-URL: https://github.com/nodejs/node/pull/17617
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>
pull/12855/merge
Matheus Marchini 2017-12-11 17:25:09 -02:00 committed by Ruben Bridgewater
parent 6918fff9c9
commit a17f426412
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CPP_STYLE_GUIDE.md
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@ -4,6 +4,7 @@
* [Formatting](#formatting)
* [Left-leaning (C++ style) asterisks for pointer declarations](#left-leaning-c-style-asterisks-for-pointer-declarations)
* [C++ style comments](#c-style-comments)
* [2 spaces of indentation for blocks or bodies of conditionals](#2-spaces-of-indentation-for-blocks-or-bodies-of-conditionals)
* [4 spaces of indentation for statement continuations](#4-spaces-of-indentation-for-statement-continuations)
* [Align function arguments vertically](#align-function-arguments-vertically)
@ -33,6 +34,26 @@ these rules:
`char* buffer;` instead of `char *buffer;`
## C++ style comments
Use C++ style comments (`//`) for both single-line and multi-line comments.
Comments should also start with uppercase and finish with a dot.
Examples:
```c++
// A single-line comment.
// Multi-line comments
// should also use C++
// style comments.
```
The codebase may contain old C style comments (`/* */`) from before this was the
preferred style. Feel free to update old comments to the preferred style when
working on code in the immediate vicinity or when changing/improving those
comments.
## 2 spaces of indentation for blocks or bodies of conditionals
```c++