From: Eric Hodel <drbrain@...7.net>
Date: 2008-12-16T15:22:49+09:00
Subject: Re: marshal_load, marshal_dump

On Dec 15, 2008, at 17:20 PM, Tim Hunter wrote:
> Eric Hodel wrote:
>> On Dec 13, 2008, at 14:36 PM, Tim Hunter wrote:
>>> Currently RMagick uses the old _dump and _load methods to marshal/ 
>>> unmarshal images. I'd like to start using the new marshal_load and  
>>> marshal_dump methods. What is the impact of switching? Can I just  
>>> replace _dump and _load with marshal_dump and marshal_load?  
>>> Suppose I have an image that was dumped using an old version of  
>>> RMagick. How do I support loading it?
>> Note that _dump/_load occurs before allocate and marshal_dump/ 
>> marshal_load occurs after.  In some instances this is an important  
>> distinction.
>
> Absolutely. I wish I could find some examples of custom marshal_dump/ 
> marshal_load implementations. Searching thru the 1.8.7/1.9.1 sources  
> didn't turn up anything illuminating.

Look in RubyGems.  Gem::Specification, Gem::Version and  
Gem::Requirement have custom marshal methods.