Re: mutability?
Re: mutability?
- Subject: Re: mutability?
- From: Philippe Mougin <email@hidden>
- Date: Thu, 8 Jul 2004 18:32:23 +0200
Fuerthaller wrote:
[...]
> I hope you can aggree on my scenarios that
> there might be some reasonable use cases
> for the mutability status of an object.
Like you I think there are perfectly legitimate use cases where it
makes sense to determine at run-time whether a string is mutable,
especially in a dynamic language like Objective-C. Yes, this can be
misused and dangerous, but no more than the possibility of asking an
object about its class. And I hope no one is thinking about removing
this feature from Objective-C ;-)
I don't think that the right way to offer information about mutability
would be to add a public API. As you noted, the problem at hand comes
from the fact that, in the current implementation, non-mutable strings
are instances of a subclass of NSMutableString (how something like that
can pass design reviews and finds its way into the, otherwise
excellent, major framework of a major operating system will be a
subject of amazement for generations of developers). Just fix this
nonsense and the problem will disappear.
Best,
Philippe Mougin
F-Script: Interactive and scripting environment for Cocoa.
http://www.fscript.org
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