Instaparse is a library for generating parsers from context-free grammars.
https://github.com/engelberg/instaparse

The big news for this release is that Alex Engelberg has combined the
Clojure version with the Clojurescript version of instaparse (initiated by
Lucas Bradstreet in 2014) so that moving forward, we can maintain both
versions as part of the same codebase.  Instaparse leverages a number of
Clojure interfaces and subtle features that differ between Clojure and
Clojurescript, so merging the ports was a significant effort.

Also, to achieve backwards compatibility, Alex wrote the cljsee leiningen
plugin which splits cljc files into clj and cljs files for compatibility
with Clojure 1.5 and 1.6.  Check out cljsee if you are interested in
maintaining backwards compatibility in your own cljc-based projects.  (
https://github.com/aengelberg/cljsee)

The one new feature is a defparser macro, especially relevant to the
Clojurescript port because it makes it possible to build the parser at
compile time so the Clojurescript code will execute more quickly.

Other than that one addition, the behavior should be identical to the prior
release.

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