From: "Shot (Piotr Szotkowski)" <shot@...>
Date: 2009-11-16T00:55:12+09:00
Subject: Re: Ruby Inline over two times slower under 1.9 than under 1.8?

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Roger Pack:

>>> here's a working example (well worked once upon a time).
>>> http://betterlogic.com/roger/?p=3D1849

>>>> RubyParser.new.parse(File.read 'hello.rb')
>> NoMethodError: undefined method `clear' for nil:NilClass

> Hmm. Maybe a bug in ruby parser?

Argh, sorry, I mis-pasted. The problem is with RubyToRubyC#process.

With just ruby2c 1.0.0.7:

>> RubyParser.new.parse(File.read 'hello.rb')
=3D> s(:class, :Hello, =E2=80=A6
>> RubyToRubyC.new.process(RubyParser.new.parse(File.read 'hello.rb'))
=3D> "// class Hello < =E2=80=A6

With also RubyToC 1.0.0.5:

>> RubyParser.new.parse(File.read 'hello.rb')
=3D> s(:class, :Hello, =E2=80=A6
>> RubyToRubyC.new.process(RubyParser.new.parse(File.read 'hello.rb'))
NoMethodError: undefined method `clear' for nil:NilClass
  from /home/shot/opt/ruby-1.8.7-svn/lib/ruby/gems/1.8/gems/ruby_parser-2.0=
=2E4/lib/ruby_parser_extras.rb:938:in `reset'

Apparently, =E2=80=98require 'ruby_to_ruby_c'=E2=80=99 pulls in RubyToC=E2=
=80=99s
ruby_to_ruby_c.rb (rather than ruby2c=E2=80=99s =E2=80=93 wich makes sense,
as R comes before r when sorting), and it=E2=80=99s the one that can=E2=80=
=99t
handle the same Sexp.

> So RubyToC 1.0.0.5 only works with an older
> version of ruby_parser, is that right?

I get the above with ruby_parser 2.0.0
as well. With ruby_parse 1.0.0 I get

>> RubyToAnsiC.new.process(RubyParser.new.parse(File.read 'hello.rb'))
NoMethodError: undefined method `[]' for nil:NilClass
  from /home/shot/opt/ruby-1.8.7-svn/lib/ruby/gems/1.8/gems/ruby_parser-1.0=
=2E0/lib/ruby_lexer.rb:2510:in `dynamic?'
  from /home/shot/opt/ruby-1.8.7-svn/lib/ruby/gems/1.8/gems/ruby_parser-1.0=
=2E0/lib/ruby_lexer.rb:191:in `gettable'
  from lib/ruby_parser.y:1429:in `_reduce_426'
  from /home/shot/opt/ruby-1.8.7-svn/lib/ruby/1.8/racc/parser.rb:331:in `__=
send__'
  from /home/shot/opt/ruby-1.8.7-svn/lib/ruby/1.8/racc/parser.rb:331:in `_r=
acc_do_reduce'

(Note: I=E2=80=99m not that fluent yet with all the RubyToRubyC vs. RubyToA=
nsiC
details, so my reasoning might be very flawed above. Do let me know if
you want me to test anything specific; all I can say for sure is that
ruby2c 1.0.0.7 works with ruby_parser 2.0.4=E2=80=99s output.)

=E2=80=94 Shot
--=20
Founding member of the Hyphenation Society, a grassroots-based,
not-for-profit, locally-owned-and-operated, cooperatively-managed,
modern-American-English-usage-improvement association.
                                                       [Rick Moen]

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