ruby_parser version 3.20.1 has been released!

Published 2023-05-16 @ 20:50

ruby_parser (RP) is a ruby parser written in pure ruby (utilizing racc–which does by default use a C extension). It outputs s-expressions which can be manipulated and converted back to ruby via the ruby2ruby gem.

As an example:

def conditional1 arg1
  return 1 if arg1 == 0
  return 0
end

becomes:

s(:defn, :conditional1, s(:args, :arg1),
  s(:if,
    s(:call, s(:lvar, :arg1), :==, s(:lit, 0)),
    s(:return, s(:lit, 1)),
    nil),
  s(:return, s(:lit, 0)))

Tested against 801,039 files from the latest of all rubygems (as of 2013-05):

• 1.8 parser is at 99.9739% accuracy, 3.651 sigma
• 1.9 parser is at 99.9940% accuracy, 4.013 sigma
• 2.0 parser is at 99.9939% accuracy, 4.008 sigma
• 2.6 parser is at 99.9972% accuracy, 4.191 sigma
• 3.0 parser has a 100% parse rate.
  • Tested against 2,672,412 unique ruby files across 167k gems.
  • As do all the others now, basically.

Changes:

3.20.1 / 2023-05-16

• 1 minor enhancement:

  • Fixes Sexp#line_max in parser for many constructs: paren_args, arrays of various sorts, calls, classes, modules, etc.
• home: https://github.com/seattlerb/ruby_parser
• bugs: https://github.com/seattlerb/ruby_parser/issues
• rdoc: http://docs.seattlerb.org/ruby_parser