From: Eric Promislow <eric.promislow@...>
Date: 2006-11-01T06:40:12+09:00
Subject: Re: Puzzling over why ri can open the std ruby/ri .yaml files, but raw yaml can't

Simple workaround...

clsInfo = YAML.load(File.open(clsFile) { |io| io.read.gsub(/- !.*/, '-
') }

But I'd still appreciate hearing the cause for this bug.

Happens with the stock Ruby 1.8.2 on OS X 10.4 running on an i386,
but with a different error message.

- Eric

>
>   def get_class_info(clsName, info)
>     clsFile = "#{@sysdir}/#{clsName}/cdesc-#{clsName}.yaml"
>     puts "About to yaml <<#{clsFile}>>"
>     clsInfo = YAML.load(File.open(clsFile) { |io| io.read.gsub(/- !.*/, '- ') }
>     pp clsInfo
>   end
> end
>
> rifinder = RiFinder.new("c:/ruby/share/ri/1.8/system", nil, nil)
> rifinder.get_class_info("Abbrev", nil)
>
> #===========
>
> About to yaml <<c:/ruby/share/ri/1.8/system/Abbrev/cdesc-Abbrev.yaml>>
> I get this error:
> c:/ruby/lib/ruby/1.8/yaml.rb:133:in `transfer': invalid subclass
> (TypeError)
>         from c:/ruby/lib/ruby/1.8/yaml.rb:133:in `load'
>         from get_yaml_info.rb:19:in `get_class_info'
>         from get_yaml_info.rb:19:in `get_class_info'
>         from get_yaml_info.rb:25
>
> ruby 1.8.4 (2006-04-14) [i386-mswin32]
>
> It's the same code, and I don't see ri setting any options in the YAML
> namespace
> telling it to process types like "!ruby/struct:SM::Flow::P"
> differently, although I gather
> this is the problem.
>
> Any advice?
>
> I can use yaml.rb to read back files I've written out with it.  The
> problem is with the
> rdoc files.  But it works when I go through ri (after adding the bug
> fix at line 99
> of ri_descriptions.rb given in
> http://ruby.about.com/od/gettingstarted/qt/ruby_ri.htm).
> 
> Thanks,
> Eric