From: Joel VanderWerf <vjoel@...>
Date: 2004-07-30T02:33:30+09:00
Subject: Re: code introspection

Robert Klemme wrote:
> "gabriele renzi" <surrender_it@remove.yahoo.it> schrieb im Newsbeitrag
> news:rkjcg0tf6o9g63lnb6lo9gk5bsjvg82kcd@4ax.com...
...
>>    load(filename, wrap=false)   => true
>>-----------------------------------------------------------------------
>>    Loads and executes the Ruby program in the file _filename_. If the
>>    filename does not resolve to an absolute path, the file is
>>searched
>>    for in the library directories listed in +$:+. If the optional
>>    _wrap_ parameter is +true+, the loaded script will be executed
>>    under an anonymous module, protecting the calling program's global
>>    namespace. In no circumstance will any local variables in the
>>    loaded file be propagated to the loading environment.
> 
> 
> Yes, but that doesn't help here since there's no way to find this
> anonymous module in order to find all classes defined in the file.  I
> tried that initially, too, but the return value of load is not the module
> but 'true' or 'false'.  Or am I missing somethig?

The anonymous module is not even reachable, so it will get GC-ed, as in 
this example:

irb(main):002:0> def foo; load "f.rb", true; end
=> nil
irb(main):003:0> ObjectSpace.each_object(Module){}
=> 372
irb(main):004:0> foo
=> true
irb(main):005:0> ObjectSpace.each_object(Module){}
=> 373
irb(main):006:0> foo
=> true
irb(main):007:0> ObjectSpace.each_object(Module){}
=> 374
irb(main):008:0> GC.start
=> nil
irb(main):009:0> ObjectSpace.each_object(Module){}
=> 372

Getting one's hands on the wrapper module is the raison d'etre of my 
little "script" lib (http://redshift.sourceforge.net/script). More 
simply, you can just read the file and use module_eval (but script adds 
some features).