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Re: Emacs 26.1 release branch created
From: |
Alan Mackenzie |
Subject: |
Re: Emacs 26.1 release branch created |
Date: |
Wed, 27 Sep 2017 18:43:25 +0000 |
User-agent: |
Mutt/1.7.2 (2016-11-26) |
Hello, Philippe.
On Wed, Sep 27, 2017 at 13:54:29 +0200, Philippe Vaucher wrote:
> > > Early Lisps had only dynamic binding because people didn't know better.
> > But
> > > now we know that global mutable state is almost always undesirable and
> > > avoid id wherever we can.
> > But my buffers are global mutable states. The whole world is a global
> > mutable state. Literally. How can we model them without such things in
> > our languages? Why would we want to?
> I think this is the wrong way to approach this. What counts here are the
> benefits: by avoiding global mutable state we make code that is easier to
> reason about, easier to test, etc.
What about the costs? Emacs has a large state, including variable
numbers of buffers, variable variables (libraries can be loaded at any
time), variable properties and text properties, ....
What you're asserting, I think, is that there is a better way to house
this state rather than "globally". No details of this other way have
been forthcoming.
> There is simply no real argument for using global mutable state when we can
> avoid it, .....
I suspect that in Emacs we can't. Or if we could, it would be at too
great a cost.
> .... except for somewhat weak arguments like "it's convenient" or
> "it'd require too much refactoring".
They're weak arguments? I'd like to hear what might be considered
strong ones!
> Philippe
--
Alan Mackenzie (Nuremberg, Germany).
- Re: Emacs 26.1 release branch created, (continued)
- Re: Emacs 26.1 release branch created, Paul Eggert, 2017/09/25
- Re: Emacs 26.1 release branch created, Philipp Stephani, 2017/09/26
- RE: Emacs 26.1 release branch created, Drew Adams, 2017/09/26
- Re: Emacs 26.1 release branch created, Alan Mackenzie, 2017/09/26
- Re: Emacs 26.1 release branch created, Alexis, 2017/09/27
- Re: Emacs 26.1 release branch created, Richard Stallman, 2017/09/27
- Re: Emacs 26.1 release branch created, Alexis, 2017/09/27
- Re: Emacs 26.1 release branch created, Óscar Fuentes, 2017/09/27
- Re: Emacs 26.1 release branch created, Alexis, 2017/09/27
- Re: Emacs 26.1 release branch created, Philippe Vaucher, 2017/09/27
- Re: Emacs 26.1 release branch created,
Alan Mackenzie <=
- Re: Emacs 26.1 release branch created, Philippe Vaucher, 2017/09/28
- Re: Emacs 26.1 release branch created, Eli Zaretskii, 2017/09/29
- Re: Emacs 26.1 release branch created, Eli Zaretskii, 2017/09/29
- RE: Emacs 26.1 release branch created, Drew Adams, 2017/09/30
- Re: Emacs 26.1 release branch created, Paul Eggert, 2017/09/30
- RE: Emacs 26.1 release branch created, Drew Adams, 2017/09/30
- Re: Emacs 26.1 release branch created, Paul Eggert, 2017/09/25
- Re: Emacs 26.1 release branch created, Alan Mackenzie, 2017/09/30
- Re: Emacs 26.1 release branch created, Paul Eggert, 2017/09/30
- Re: Emacs 26.1 release branch created, Paul Eggert, 2017/09/25