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'''cpplint''' or '''cpplint.py''' is an open source [[Software:Lint|lint]]-like tool developed by [[Company:Google|Google]],
designed to ensure that [[C++]] code conforms to [https://google.github.io/styleguide/cppguide.html Google's coding style guides].

Therefore cpplint implements what Google considers best practices in C++ coding.
The script cpplint.py reads source code files and flags deviations from the style guide.
It also identifies syntax errors.
It is rules based, and uses a number of heuristics to identify bad code.<ref>{{cite thesis |url=https://engagedscholarship.csuohio.edu/cgi/viewcontent.cgi?context=etdarchive&article=1732#page=20 |format=PDF |last=Dutko |first=Adam M. |title=The Relational Database: a New Static Analysis Tool? |date=2011 |oclc=750403495 |issn=2572-3480 |number=733 |page=20 |type=Master of Science |publisher=Cleveland State University |url-status=live |archive-url=https://web.archive.org/web/20180518113320/https://engagedscholarship.csuohio.edu/cgi/viewcontent.cgi?referer=&httpsredir=1&article=1732&context=etdarchive |archive-date=18 May 2018}}</ref>

cpplint.py suffers from both false positives and false negatives.
False positives can be eliminated by tagging lines with {{nowrap|<code>// NOLINT</code>}}<ref>{{cite web|title=Google C++ Style Guide, section cpplint|first=Benjy|last=Weinberger|url=https://google.github.io/styleguide/cppguide.html#cpplint}}</ref> (or 
{{nowrap|<code>// NOLINT(rule)</code>}} to suppress only the incriminated <code>rule</code> category).

Moreover rules can be fine-grained selected using the options {{nowrap|<code>--verbose</code>}} and {{nowrap|<code>--filter</code>}}.
Line length rule can be configured with option {{nowrap|<code>--linelength</code>}}
and file extensions can be configured with {{nowrap|<code>--extensions</code>}} (by default: 'h', 'cpp', 'cc', 'cu' and 'cuh').
Some options can be stored in a configuration file {{nowrap|<code>CPPLINT.cfg</code>}}.

cpplint is implemented as a [[Python (programming language)|Python]] script.<ref>{{cite web|title=GIT URL for cpplint.py|author=Google|url=https://github.com/google/styleguide/tree/gh-pages/cpplint}}</ref>
It is distributed under the [[Software:BSD license|3 clause BSD license]].

==See also==
* [https://github.com/google/styleguide/tree/gh-pages/cpplint google/styleguide/cpplint - GitHub]
* [https://pypi.python.org/pypi/cpplint Advanced fork of cpplint on PyPI]

==References==
{{Reflist}}

{{Google FOSS}}

[[Category:Google software]]
[[Category:Software using the BSD license]]

{{Sourceattribution|Cpplint}}