ruby_parser version 3.14.1 has been released!

Published 2019-10-29 @ 21:10

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

Changes:

3.14.1 / 2019-10-29

• 1 minor enhancement:

  • Declared that ruby_parser supports ruby 2.2 and up.

• 3 bug fixes:

  • Fixed a problem with %W with a null-byte terminator. (wtf?) (spohlenz)
  • Fixed line numbering for command (eg methods without parentheses) arguments. (mvz)
  • Fixed lineno on new dxstrs. (presidentbeef)
• home: https://github.com/seattlerb/ruby_parser
• bugs: https://github.com/seattlerb/ruby_parser/issues
• rdoc: http://docs.seattlerb.org/ruby_parser