From: Martin Hart <martin@...>
Date: 2004-02-12T23:22:33+09:00
Subject: YAML and Class


Hi all,

I notice that the default YAML (ruby 1.8.1) does not dump or load Class by 
default.
I have extended my local copy to do so, but now I wonder if there is a reason 
why it does not support this feature that I have overlooked/not fully 
appreciated?

Cheers,
Martin

FYI - this is my patch (Is there another way of creating a class without 
having to eval the string?)

YAML.add_ruby_type(/^class/) { |type, val|
  val =~ /\A[A-Z][A-Za-z0-9_]*(::[A-Z][A-Za-z0-9_]*)*\z/ or raise YAML::Error, 
"Invalid Class: #{val.inspect}"
  eval val
}

class Class
  def to_yaml(opts = {})
    YAML::quick_emit(nil, opts) { |out|
      out << "!ruby/class "
      self.name.to_yaml(:Emitter => out)
    }
  end
  def is_complex_yaml?
    false
  end
end