From: Anders Bengtsson <ndrsbngtssn@...>
Date: 2004-06-07T23:06:53+09:00
Subject: Re: Custom marshalling with YAML

 --- Michael Neumann <mneumann@ntecs.de> wrote:
> How about this:
> 
>   module Kernel
>     def to_yaml
>       if respond_to? :_dump
>         _dump(nil).to_yaml    # TODO: _dump takes one paramter
>       else
>         raise 
>       end
>     end
>   end

That would be a nice solution. But the string returned by _dump
probably won't be valid YAML.

If I have the following class

class Foo
  def _dump(x)
    "foo"
  end

  def to_yaml
    _dump
  end
end

then YAML.dump(Foo.new) will return "foo". But that's no good, since
there's nothing to tell it that this "foo" should be de-YAMLed into a
new Foo instance.
Marshal.dump(Foo.new) will return "\004\010u:\010Foo\010foo", with all
the needed meta-data.

> _load is a class method!

Yes. :) But what's the corresponding method for YAML?

/Anders


=====
__________________________________________________
Anders Bengtsson              ndrsbngtssn@yahoo.se
Stockholm, Sweden

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