From: Brian Candler <B.Candler@...>
Date: 2003-05-13T22:58:55+09:00
Subject: Ruby<->Perl and syck-0.25 problem

Any syck users out there? I have an urgent need to get some Perl<->Ruby
communication and I thought YAML RPC would be a good way to do this, now
there is a fast YAML parser for Ruby (this assumes there is a decent YAML
implementation for Perl of course, which syck doesn't support)

However I've tried installing syck-0.25 and it seems to have some bits
missing:

irb(main):002:0> require 'yaml'
NameError: undefined method `add_ruby_type' for YAML:Module
        from /usr/local/lib/ruby/site_ruby/1.6/yaml/rubytypes.rb:26
        from /usr/local/lib/ruby/site_ruby/1.6/yaml.rb:19:in `require'
        from /usr/local/lib/ruby/site_ruby/1.6/yaml.rb:19
        from (irb):2:in `require'
        from (irb):2

Grepping the source I can see where add_ruby_type and add_builtin_type are
used, but not where they are defined.

Am I missing some magic source file?

Also, anybody have any other smart ideas about how to exchange a tree of
objects between Ruby and Perl? SOAP is too slow, and XMLRPC doesn't keep the
inter-object references properly (in fact I think it dies completely when
given a circular reference). A simple request-response model is all I need,
and the two bits are on the same machine, so no need to go via a socket if
there's a direct way of integrating them.

Cheers...

Brian.