JRuby Prism - A new parser for a new era | blog.jruby.org

JRuby has added support for the new backend parser Prism via the gem: jruby-prism-parser. Installing this gem will give you access to enable Prism (export JRUBY_OPTS="-Xparser.prism"). At this stage jruby-prism-parser is at the technology preview stage but capable of running pretty much everything: Rake, RSpec, RubyGems, Bundler, etc… We plan on this being the default parser when we release our next major JRuby release (9.5) which will be targeting Ruby 3.3 support.We encourage all JRuby users to give it a try and help us work out any kinks. Both in our integration with Prism and for Prism itself as it is still under heavy development.