ruby_parser version 3.0.0.a3 has been released!

Published 2012-07-03 @ 20:03

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) if arg1 == 0 then return 1 end return 0 end

becomes:

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

Changes:

3.0.0.a3 / 2012-07-03

• 1 major enhancement:

  • OMG! Implemented all the 1.9 arg crap and I went from 500 lines of structural diff to 32!

• 17 minor enhancements:

  • 1.9: !(…) is now a method call. ugh
  • 1.9: Added ENCODING keyword (returns Unsupported atm).
  • 1.9: Added support for “a.()” thingy. whatever you call it. Have I ever mentioned that ruby has too much syntax? I mean really…
  • 1.9: Moved kRETURN/kBREAK/kNEXT from command_call to command
  • 1.9: Removed when_args and refactored into args production.
  • 1.9: Support for not/! being a call to #!. why matz? why?!?
  • 1.9: Support for trailing comma support in opt call args.
  • 1.9: Switched keyword support to deal with 1.8 vs 1.9 differences.
  • 1.9: refactored and created command_asgn
  • 1.9: removed case/else from primary
  • 1.9: reworked mlhs and family. Now horrible things like ‘a, *, c = f’ work
  • 1.9: reworked top level rules from program to expr. Lots of lame refactorings in mri.
  • Moved ‘a[]’ from primary down to method_call
  • Removed ‘args trailer’ production from assoc_list (eg {1, 2}).
  • Removed 1.9 support for : as a terminator in do/then
  • RubyParser no longer subclasses the 18 parser, so I had to change some consts around.
  • Undeprecated RubyParser - but now it is a compound parser that tries 1.9 first.

• 3 bug fixes:

  • 1.9: fixed bang method name.
  • Fixed case/when/splat handling on both 1.8 and 1.9.
  • Removed lambda_body production from lambda
• bugs: https://github.com/seattlerb/ruby_parser/issues
• rdoc: http://docs.seattlerb.org/ruby_parser
• home: https://github.com/seattlerb/ruby_parser