> For the complete documentation index, see [llms.txt](https://joungkyun.gitbook.io/annyung-3-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://joungkyun.gitbook.io/annyung-3-user-guide/annyung3-package-catalog/annyung3-addon-packages/pkg-addon-re2c.md).

# re2c

## Description:

re2c is a great tool for writing fast and flexible lexers. It has served many people well for many years and it deserves to be maintained more actively. re2c is on the order of 2-3 times faster than a flex based scanner, and its input model is much more flexible.

## Features:

## Reference:

* <http://re2c.org/manual/manual.html>
* <http://re2c.org/examples/examples.html>

## Dependencies:

* None

## Sub Packages:

* None

## Related Packages:

* [php-devel](/annyung-3-user-guide/annyung3-package-catalog/annyung3-base-packages/pkg-base-php.md)
* [php56-devel](/annyung-3-user-guide/annyung3-package-catalog/annyung3-addon-packages/pkg-addon-php56.md)