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Re: Removing unloaded functions from auto-mode-alist.
From: |
David Kastrup |
Subject: |
Re: Removing unloaded functions from auto-mode-alist. |
Date: |
Mon, 25 Apr 2005 00:00:44 +0200 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Lute Kamstra <address@hidden> writes:
> David Kastrup <address@hidden> writes:
>
>> Lute Kamstra <address@hidden> writes:
>>
>>> Consider the following situation:
>>>
>>> function 'a is autoloaded: (autoload "blabla" ...).
>>> function 'b is autoloaded: (autoload "other" ...).
>>> function 'c is defined.
>>> function 'd is unbound.
>>>
>>> "blabla" defines 'a, 'b, 'c, and 'd as functions.
>>>
>>> Do (require 'blabla) and then (unload-feature 'blabla).
>>>
>>> Currently, all four functions will be unbound by unload-feature.
>>> You propose to let unload-feature restore both 'a and 'b to their
>>> previous autoloads [1].
>>
>> Sure.
>>
>>> But what should be done with 'c?
>>>
>>> I think restoring 'c to its previous definition would be the right
>>> thing to do.
>>
>> Not at all. The purpose of unload-feature is to be able to restore
>> a state, most particular to conserve memory. So unload-feature
>> should not waste memory by keeping in effect a history of load
>> sequences around. Its purpose should be confined to unloading
>> those features that _can_ reasonably be unloaded. And that means
>> no functions whatsoever that _redefine_ stuff. The main purpose of
>> the autoload restoration is to restore autoloads into the package
>> itself, not foreign autoloads.
>
> For me, it is most intuitive/logical that unload-feature tries to
> undo the effects of loading the feature.
If it can.
> It is very uncommon that a feature redefines a function (or a
> variable), so keeping track of such cases will not waste much
> memory.
But it is very common that one loads and evals one and the same file
over and over. We don't want to keep a history of that.
>> I think that unload-feature should in the case of c being redefined
>> simply barf and refuse to unload the feature.
>
> That's quite extreme. And it would require you too keep track of
> redefinitions.
Of the fact that they happened. That is about one cons cell worth of
data. Old definitions, in contrast, can take any amount of data.
> Why not use that tracking machinery to just restore these rare
> cases?
They don't seem exactly rare to me.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
- Re: Removing unloaded functions from auto-mode-alist., (continued)
- Re: Removing unloaded functions from auto-mode-alist., David Kastrup, 2005/04/20
- Re: Removing unloaded functions from auto-mode-alist., David Kastrup, 2005/04/20
- Re: Removing unloaded functions from auto-mode-alist., Richard Stallman, 2005/04/21
- Re: Removing unloaded functions from auto-mode-alist., David Kastrup, 2005/04/21
- Re: Removing unloaded functions from auto-mode-alist., Richard Stallman, 2005/04/23
- Re: Removing unloaded functions from auto-mode-alist., David Kastrup, 2005/04/20
- Re: Removing unloaded functions from auto-mode-alist., Stefan Monnier, 2005/04/20
- Re: Removing unloaded functions from auto-mode-alist., Lute Kamstra, 2005/04/24
- Re: Removing unloaded functions from auto-mode-alist., David Kastrup, 2005/04/24
- Re: Removing unloaded functions from auto-mode-alist., Lute Kamstra, 2005/04/24
- Re: Removing unloaded functions from auto-mode-alist.,
David Kastrup <=
- Re: Removing unloaded functions from auto-mode-alist., Lute Kamstra, 2005/04/24
- Re: Removing unloaded functions from auto-mode-alist., David Kastrup, 2005/04/24
- Re: Removing unloaded functions from auto-mode-alist., Richard Stallman, 2005/04/26
- Re: Removing unloaded functions from auto-mode-alist., Lute Kamstra, 2005/04/20
- Re: Removing unloaded functions from auto-mode-alist., Lute Kamstra, 2005/04/19
- Re: Removing unloaded functions from auto-mode-alist., Andreas Schwab, 2005/04/19
- Re: Removing unloaded functions from auto-mode-alist., David Kastrup, 2005/04/20
Re: Removing unloaded functions from auto-mode-alist., Lute Kamstra, 2005/04/19