On Tue, Dec 8, 2020 at 8:02 PM Pascal Costanza wrote:
>
> The implementation of ContextL relies heavily on the CLOS MOP, and among
> other things on runtime class redefinition and corresponding updates of
> class instances. You can find the details how the class redefinition
> machinery is used i
On Tue, Dec 8, 2020 at 3:21 PM d...@refined-audiometrics.com <
d...@refined-audiometrics.com> wrote:
> I am interested to hear arguments in both directions. But you haven’t
> outlined the alternative, other than to state that they exist. What are
> these alternatives?
>
The main purpose of my or
On Tue, Dec 8, 2020 at 4:17 PM Svante Carl v. Erichsen <
svante.v.erich...@web.de> wrote:
> Hi!
>
> It is used all the time while working on a live system (image).
>
> If you want raw performance, you can often substitute structs, if you
> can live with the downsides: all objects from a class must
> On 7 Dec 2020, at 05:52, Jean-Claude Beaudoin
> wrote:
>
>
> Hello Pros of Common Lisp,
>
> Here is my attempt at starting a significant (and hopefully useful) debate on
> a subject squarely about Common Lisp and its internals.
>
> My main stance here is to state that I have yet to see,
I see it and use it a lot. Maybe that's not significant to you, but it's
significant to me.
Zach
On Tue, Dec 8, 2020 at 2:51 PM Jean-Claude Beaudoin <
jean.claude.beaud...@gmail.com> wrote:
>
> Hello Pros of Common Lisp,
>
> Here is my attempt at starting a significant (and hopefully useful) deb
Hi!
It is used all the time while working on a live system (image).
If you want raw performance, you can often substitute structs, if you
can live with the downsides: all objects from a class must be thrown
away on redefinition (which might be OK if you want to treat e. g. a
production system as
I once used update-instance-for-redefined-class in ASDF, when I was
trying to make a smooth upgrade from ASDF 1 to ASDF 2. The problem I
found is that proper support for class redefinition requires the
cooperation not only of the underlying object system, but also of all
the parts of the implementa
I am interested to hear arguments in both directions. But you haven’t outlined
the alternative, other than to state that they exist. What are these
alternatives?
I use these MOP functions indirectly whenever I perform a CHANGE-CLASS on
objects, mimicking something akin to Smalltalk BECOME. And
Updating instances when classes are redefined is critical to interactive
development with the REPL.
If you want to see why it's so critical, try working with Python and
modifying a class definition. You have to shut down the interpreter and
start over, which is a huge pain if your system has
Pascal Costanza wrote:
>>
>>
>> > Parallel GC is no problem and implemented.
>>
>>
>> Which CL implementations have a parallel GC?
I'm a little late to the conversation, but we have been experimenting
with a multi-threaded garbage collector that runs mostly in parallel
with the lisp applicati
Hello Pros of Common Lisp,
Here is my attempt at starting a significant (and hopefully useful) debate
on a subject squarely about Common Lisp and its internals.
My main stance here is to state that I have yet to see, in a significant
application, any use of functions #'cl:make-instance-obsolete a
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