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On Wed, Oct 20, 2010 at 03:27:16AM +0900, Tim Garnett wrote:
> YAML serialization seems to be failing for me with any structure that
> involves a hash with a set key. Is there documentation anywhere on what
> sorts of objects are able to be serialized/deserialized via YAML? Or if
> this is a bug that's fixed in a newer ruby version (I'm using
> 1.9.1p378)?  I would have expected this to work...

This is a bug in Syck (the yaml parser / emitter in Ruby < 1.9.2).

The bug is fixed in Psych.  Psych ships with Ruby 1.9.2:

    irb(main):001:0> RUBY_VERSION
    => "1.9.2"
    irb(main):002:0> require 'psych'
    => true
    irb(main):003:0> require 'set'
    => true
    irb(main):004:0> Psych.load(Psych.dump({[1].to_set=>1}))
    => {#<Set: {1}>=>1}
    irb(main):005:0> Psych.load(Psych.dump([1,2,3].to_set)
    irb(main):006:1> )
    => #<Set: {1, 2, 3}>
    irb(main):007:0>

-- 
Aaron Patterson
http://tenderlovemaking.com/

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