ruby_parser version 3.12.0 has been released!

Published 2018-12-04 @ 13:30

ruby_parser (RP) is a ruby parser written in pure ruby (utilizing racc–which does by default use a C extension). RP’s output is the same as ParseTree’s output: s-expressions using ruby’s arrays and base types.

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

Changes:

3.12.0 / 2018-12-04

• 3 minor enhancements:

  • 2.5: Allow rescue/ensure/else in normal do blocks. (presidentbeef)
  • Added stabby proc with do/end as block call argument. (presidentbeef)
  • Holy cow levels of optimization from presidentbeef. I write slow bad code.

• 1 bug fix:

  • Improve handling of single-quoted symbols and labels. (mvz)
• home: https://github.com/seattlerb/ruby_parser
• bugs: https://github.com/seattlerb/ruby_parser/issues
• rdoc: http://docs.seattlerb.org/ruby_parser