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by ryan davis



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ruby_parser version 3.0.0.a1 has been released!

Published 2012-05-22 @ 17:30

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) 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.a1 / 2012-05-22

This is the first alpha release of the 3.0.0 series. It is probably woefully incomplete, bug ridden, and hasn’t showered in several days. Please please please beat the crap out of it and send bugs/patches/complaints/suggestions.

  • 5 major enhancements:

    • 1.9 parsing! Thanks to EVERYONE for submitting patches for this!
    • Removed :arglist from everything but :op_asgn1
    • Removed :block from resbody
    • Removed :block from when
    • Removed :block nodes inside of scope nodes (defn/defs/class/sclass).
    • Removed :scope nodes in defn/defs/class/sclass nodes.
    • (probably more sexp cleanup to come before 3.0.0 final)
  • 25 minor enhancements:

    • 1.9: Fix !a. (wanabe)
    • 1.9: Method calling with postargs. (wanabe)
    • 1.9: Method definition with postargs. (wanabe)
    • 1.9: Support lambda args without parentheses. (wanabe)
    • Added R arg to rake debug to debug ruby straight up
    • Added RubyParser, subclassing Ruby18Parser but warning on instantiation.
    • Added backref_assign_error (needs tests)
    • Added bin/ruby_parse_extract_error to help with error submissions
    • Added debug task to help quickly get into a bug
    • Added more 18 vs 19 lexing tests for ?c.
    • Added ruby_parser.rb that pulls everything together in proper order.
    • Added tLABEL. (brynary)
    • Branched ruby_parser.y to ruby18_parser.y
    • Fix to pass test_lambda_args_block__19 test. (mrmargolis)
    • Got rid of one instance of unread_many. (Confusion)
    • Moved everything from RubyParser to RubyParserStuff and included module in both.
    • Refactored 1.9 args handling
    • Refactored and added new_resbody to ruby_parser_extras.
    • Refactored and added new_when
    • Refactored tests infrastructure and added both 1.8 and 1.9 test branches.
    • Removed unused methods: unread, begin_of_line? was_begin_of_line. (YAY!) (Confusion)
    • Renamed ruby_parser.y to ruby19_parser.y
    • RubyLexer now takes a version specifier.
    • Started doing comparative refactoring between MRI’s 1.9 parser and RP’s. Shouldn’t differ functionally except where we missed stuff in RP.
    • rake debug prints the output if it succeeds.
  • 21 bug fixes:

    • Added missing gvar arg error. (1.8)
    • Attach parser files to isolate to ensure they can build
    • Conditionalize handling of tLABEL to ruby19+. Fixes issue #33.
    • DOH. I deactivated some tests and never reactivated them. (Confusion ftw)
    • Duplicate the input so that heredoc processing doesn’t morph original. (banister)
    • Entirely reworked block arg handling. (1.8)
    • Fix ?x char literal. (nobu)
    • Fixed 4/5 of literal lambda tests (jamie)
    • Fixed deps for parser
    • Fixed lexing of ?c for ruby 1.8 and 1.9.
    • Fixed more Ruby 1.9 args tests (brynary)
    • Fixed reswords to match MRI (1.8, 1.9)
    • Fixed symbols with no spaces in method calls (e.g. foo:bar) (YAY! brynary)
    • Fixed ternary_nil_no_space and other ternary edge cases for 1.9. (lastobelus)
    • Fixed test_call_not_equal__19. First bug bounty! (albus522)
    • Made lambda w/o arg list zero out the arg slot.
    • Renamed awords to qwords to match stupid MRI naming. (1.8, 1.9) :(
    • Rolled out brynary’s symbols-no-spaces (foo:bar) changes when parsing 1.8 code
    • Split 1.8 from 1.9 open paren lexer. Gawd that’s ugly code.
    • Split block_var from for_var. (1.8, 1.9)
    • Use binread (and emulate in ruby 1.8) to avoid encoding issues
  • home: https://github.com/seattlerb/ruby_parser
  • rdoc: http://docs.seattlerb.org/ruby_parser
  • bugs: https://github.com/seattlerb/ruby_parser/issues