From: Dmitry Bilunov <kmeaw@...>
Date: 2007-08-08T20:21:19+09:00
Subject: Re: non-constant strings

dohzya wrote:
> Hi,
> 
> 2007/8/7, Dmitry Bilunov <kmeaw@kmeaw.com>:
>>   # Creates an instance. Guaranties, that a command is safe.
>>   end
>>
>>
>>
> You want to freeze the object @command, not the class String, don't
> you ?
> So you don't need to use an Immutable_String class, just add
> @command.freeze in your code

It will make impossible changing @command inside instance methods (which 
can be guaranteed to be safe). If there is a way to unfreeze a frozen 
object, then this method could be called externally and one can gain 
write access to an internal instance variable.
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