Parse any language you can describe in BNF -- Release 2
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This is a working repository for RELEASE 2 of the Marpa.

NOTICE to CONTRIBUTORS: Marpa::R2 is not completely frozen, but it is
largely closed to new features.  In making exceptions, the welfare of
the current application base is primary -- new features should be fully
compatible and to have a low-risk of introducing new problems.

Bug fixes to Marpa::R2 are welcome, and get the Marpa projects highest

If you want to work on a new feature, it is best to ask before investing
a lot of time or effort into it.

Contributing to Marpa::R2

This is the repository for Marpa::R2, release 2 of the Marpa Perl

By submitting code to this repository, you are considered to have
signed off on the Developer's Certificate of Origin, which is given

All code contributed must be compatible with version 3 of the Lesser
GNU General Public License (LGPLv3), which is the license covering
the Marpa::R2 distribution as a whole.

Copyright assignments are not required (or requested). All code
retains its original ownership.  One implication of this ownership
structure is that any attempt to change the licensing will require
the agreement of all copyright holders.  As a practical matter,
this means that it will soon become impractical to change the

It is imperative that all contributed code be legitimately free
software.  For that reason, code from anonymous (or pseudonymous)
contributors will not be accepted.  By contributing code to this
repository, all contributors "sign off" on that code, agreeing that
the code can be distributed under the LGPL.  Code which has not
been licensed as free software by its owner, or which risks creating
copyright-related problems (such as code which derives from
reverse-engineering efforts lacking proper safeguards) cannot be

Developer's Certificate of Origin

>  By making a contribution to this project, I certify that:
>  (a) The contribution was created in whole or in part by me and I
>      have the right to submit it under the open source license
>      indicated in the file; or
>  (b) The contribution is based upon previous work that, to the best
>      of my knowledge, is covered under an appropriate open source
>      license and I have the right under that license to submit that
>      work with modifications, whether created in whole or in part
>      by me, under the same open source license (unless I am
>      permitted to submit under a different license), as indicated
>      in the file; or
>  (c) The contribution was provided directly to me by some other
>      person who certified (a), (b) or (c) and I have not modified
>      it.
>  (d) I understand and agree that this project and the contribution
>      are public and that a record of the contribution (including all
>      personal information I submit with it, including my sign-off) is
>      maintained indefinitely and may be redistributed consistent with
>      this project or the open source license(s) involved.