From: Eric Promislow <eric.promislow@...>
Date: 2006-11-01T06:05:12+09:00
Subject: Puzzling over why ri can open the std ruby/ri .yaml files, but raw yaml can't

If I run <<ri Abbrev>>, no problem.

But with this code:

##########
require 'yaml'
require 'pp'

class RiFinder
  def initialize(sysdir)
    @sysdir = sysdir
  end

  def get_class_info(clsName, info)
    clsFile = "#{@sysdir}/#{clsName}/cdesc-#{clsName}.yaml"
    puts "About to yaml <<#{clsFile}>>"
    clsInfo = File.open(clsFile) { |io| YAML.load(io) }
    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