re2c is in the public domain. The data structures and algorithms used in re2c are all either taken from documents available to the general public or are inventions of the author. Programs generated by re2c may be distributed freely. re2c itself may be distributed freely, in source or binary, unchanged or modified. Distributors may charge whatever fees they can obtain for re2c. If you do make use of re2c, or incorporate it into a larger project an acknowledgement somewhere (documentation, research report, etc.) would be appreciated.
re2c is distributed with no warranty whatever. The code is certain to contain errors. Neither the author nor any contributor takes responsibility for any consequences of its use.
This page describes re2c version 0.16.