What would Squeak be like without non-local returns
reefedjib at yahoo.com
Wed Nov 7 01:20:50 UTC 2007
----- Original Message -----
From: "Igor Stasenko" <siguctua at gmail.com>
To: "The general-purpose Squeak developers list"
<squeak-dev at lists.squeakfoundation.org>
Sent: Tuesday, November 06, 2007 4:19 PM
Subject: Re: What would Squeak be like without non-local returns
> On 07/11/2007, Rob Withers <reefedjib at yahoo.com> wrote:
>> I'll just throw this out and see what turns up. As you have probably
>> heard, I am toying with adding eventual refs to Squeak. Unfortunately,
>> don't play well with non-local returns. Igor and I had been discussing
>> could be done with methods having non-local returns adn it is looking
>> So I thought to look at another piece of the puzzle and question its
> I don't think that their existence are questionable.
> Their have own purpose and in example you shown it proves that using
> non-local returns is much more convenient and easier for developer.
Yeah, I agree. My brain is wired to think that way, cause if it is time to
exit the method, then go ahead.
> If there are problems between exceptions/non-local returns and
> eventual refs, then they must be solved in one way or another but
> without sacrificing other language features.
E states that non-local returns are bad and we are seeing th implications of
that statement. Our candidate solution of mixing non-local returns and
eventual refs is not pretty.
> When i started my comments about need of special care with any stack
> unwinding operations i just wanted to point that you must take special
> care. It not that easy as removing non-local returns, but its
> solvable. So, i think, a better direction is to find a solution rather
> than looking how to put new feature by removing old one.
I wanted to consider the possibility. We shouldn't leave rocks unturned.
Knowing we have blocks in play within the execution of a method, we say we
want to synchronize the execution of the method and not run it eventually.
How do we do this?
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