immutability and become (Was: Re: [squeak-dev] immutability)
siguctua at gmail.com
Thu Mar 18 04:15:25 UTC 2010
As well, as i could simply do:
object isMutable ifFalse: [ object becomeForward: object clone ].
And so, #become becomes a universal tool to defeat an immutability.
On 18 March 2010 06:00, Igor Stasenko <siguctua at gmail.com> wrote:
> Yes, i am against adding immutability bit in VM.
> But if we going that way, then please explain me how VM will respect
> immutability and #become: or #becomeForward:
> at the same time.
> The problem is following:
> suppose your object (a) is referencing object (b).
> now you doing:
> a beImmutable.
> and then
> b becomeForward: c.
> which leads to replacement of reference to (b) by reference to (c)
> in an object (a), which is immutable.
> You could say, lets ignore this.
> Then, apparently , expect to see a hacky code, which as a workaround
> of immutability, using #become..
> Best regards,
> Igor Stasenko AKA sig.
Igor Stasenko AKA sig.
More information about the Squeak-dev