From: Aria Stewart <aredridel@...>
Date: 2009-11-01T02:15:42+09:00
Subject: Re: In-place parameter modification

>>
>> I wonder why Object (or BasicObject) doesn't know this trick.
>>
>> I also wonder why "replace" isn't called "replace!" :)
>
> This is cool, but it only works for mutating methods that already  
> exist,
> if you want to write your own you're out of luck, as far as the core
> classes go.

Unless you hack in C or use evil.rb.
They're just C structs, ultimately, and you can do ALL sorts of fun  
with them.

Immediates could be tricky, though, since the reference to them /is/  
the data. No struct in sight.