From: masa@...
Date: 2001-05-16T11:17:39+09:00
Subject: [ruby-talk:15230] Re: Discussion on new Ruby features

Hi,

>From: matz@zetabits.com (Yukihiro Matsumoto)
>Subject: [ruby-talk:15227] Re: Discussion on new Ruby features

> The only elegant solution I can think of:
> 
>   * introduce reference counting.
> 
>   * + for String and Array (and others) concat to self, if reference
>     count is 1, which means there's no alias to the object.

I have another idea;

  * + concat to self, if reference count is *0*, which means
    there's no *reference* to the object.

Then,

  x = a + b + c

will be equivalent to

  temp_obj  = a + b  # temp_obj is an imaginary variable, no reference to it.
  temp_obj << c	     # for String
  x = temp_obj

Masa Tanaka