GNU bug report logs - #3467
23.0.94; let + make-local-variable => let value made global

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Message #90 received at 3467 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Lennart Borgman <lennart.borgman <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 3467 <at> debbugs.gnu.org
Subject: Re: bug#3467: 23.0.94; let + make-local-variable => let value made 
	global
Date: Sun, 7 Jun 2009 03:11:23 +0200

Rethinking. Everything is wrong in my solution and suggestion. Coming back.


On Sat, Jun 6, 2009 at 10:11 PM, Lennart
Borgman<lennart.borgman <at> gmail.com> wrote:
> On Sat, Jun 6, 2009 at 12:48 AM, Lennart
> Borgman<lennart.borgman <at> gmail.com> wrote:
>>
>> Sigh, and my suggestion was of course unnecessary stupid. What is
>> needed is of course to record values and frame+buffer localness and
>> dito values and reset them. Nothing less than this will ever work
>> correctly, or?
>>
>> And does not this apply to all uses of specbind + unbind_to?
>>
>> Can it be sufficient to just change specbind and unbind_to? Is there
>> anything else that will be affected by changes in the specbind stack?
>> Since info about buffer+frame is alwas needed should specbinding be
>> changed to the below form?
>>
>> struct specbinding
>>  {
>>    Lisp_Object symbol;
>>    Lisp_Object old_value;
>>    Lisp_Object old_buffer_value;
>>    Lisp_Object old_frame_value;
>>    specbinding_func func;
>>    Lisp_Object unused;         /* Dividing by 16 is faster than by 12 */
>>    Lisp_Object unused;
>>    Lisp_Object unused;
>>  };
>
> Here is a bit modified suggestion and some code where I try to
> implement it. Please notice that I have not tested the code. It is
> very possible that I have misunderstood something so please look at
> the code.
>
> struct specbinding
>  {
>    Lisp_Object symbol;
>    Lisp_Object old_value;
>    specbinding_func func;
>    // total 8 fields
>    Lisp_Object need_test_local;
>    Lisp_Object old_buffer;
>    Lisp_Object old_buffer_value;
>    Lisp_Object old_frame;
>    Lisp_Object old_frame_value;
>    //Lisp_Object unused;               /* Dividing by 16 is faster than by 12 */
>  };
>

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