crackercat / re2c

Lexer generator for C, C++ and Go.

DESCRIPTION

re2c is a free and open-source lexer generator for C, C++ and Go.

Its main goal is generating fast lexers: at least as fast as their reasonably optimized hand-coded counterparts. Instead of using traditional table-driven approach, re2c encodes the generated finite state automata directly in the form of conditional jumps and comparisons. The resulting programs are faster and often smaller than their table-driven analogues, and they are much easier to debug and understand. re2c applies quite a few optimizations in order to speed up and compress the generated code.

Another distinctive feature is its flexible interface: instead of assuming a fixed program template, re2c lets the programmer write most of the interface code and adapt the generated lexer to any particular environment.

DOCUMENTATION

Official re2c website is re2c.org. It has a lot of examples.

DOWNLOAD

Release tarballs: https://github.com/skvadrik/re2c/releases

Source code:

$ git clone https://github.com/skvadrik/re2c.git
$ git clone https://git.code.sf.net/p/re2c/code-git

Github is the main repo, sourceforge is a mirror and can be slightly outdated.

CONTRIBUTING

re2c is an Open Source, community-driven project. See CONTRIBUTING.md for details about contributions to this repository.

BUILD

See BUILD.md or the online docs for instructions how to build re2c.

FEEDBACK

Bugtracker:

• https://github.com/skvadrik/re2c/issues

Mailing lists:

• [email protected]
• [email protected]

IRC channels:

• irc.oftc.net/#re2c
• irc.libera.chat/#re2c

You are welcome to ask for help or share your thoughts and ideas.

AUTHORS

Re2c was originally written by Peter Bumbulis [email protected]. Since then many people contributed to the project. The current maintainer is Ulya Trofimovich [email protected].