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bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-f
From: |
martin rudalics |
Subject: |
bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions] |
Date: |
Tue, 27 Oct 2020 19:05:37 +0100 |
> I'd like to help you, but I don't understand: are you updating Emacs to
> master in all 50 of those drives? Do you do this 50 times? By hand?
> Why can't you update your eldoc-tooltip.el in the process?
Every year I experience around two or three crashes among my machines
which run various operating systems ranging from Windows XP to Windows
10 and old stable to unstable Debian. When a HD drive crashes, I try
to recreate the prior state by plugging in an older disk or copy the
contents of that older disk into a new one. Thereafter, I usually
update my Emacs repositories reusing my older libraries. If I also have
to update my libraries, I'm ending up in Augean stables.
> I don't understand how this can work: it's essential that ElDoc calls
> eldoc-documentation-functions _through_ eldoc-documentation-function:
> that's the only way it can deal with both old-style libraries that set
> the latter and new-style library that set the former. That's the key to
> backward compatibility, and it's working correctly for many old and new
> packages. Furthermore, this link between the two variables _precedes_
> my code (see SHA c0fcbd2c119b8418855f0931aceefbef717c5e53): I just added
> the async support.
Then I fail to understand why my old code stopped working after your
changes. On the version of master I'm currently using here it's even
documented in the Elisp manual as
‘eldoc-documentation-function’
This variable holds the function which is used to retrieve
documentation for the item at point from the functions in the hook
‘eldoc-documentation-functions’. By default,
‘eldoc-documentation-function’ returns the first documentation
string produced by the ‘eldoc-documentation-functions’ hook.
> If "function definitions" were at stake, I would certainly agree with
> you. But they're not.
Here 'elisp-eldoc-documentation-function' is a function defined in
elisp-mode.el. IIUC this function has gone now.
> If you are going to update Emacs to master in N servers, you might as
> well update your library in those N servers. If you're updating it by
> hand, then this doesn't seem like a tremendous extra effort to expend.
> If you're using a script, just put the library update in that script. I
> personally use Git to good effect for this: push once, pull many times.
This is not something I do once to be done for ever. It's something
that I usually have to do in a troublesome situation where I have to
recover from a previous crash and I'm trying to make some system run
again. I can't afford to plug in all sorts of hard disk drives in order
to make them future-proof.
> Alternatively, and perhaps even better, you're invited to contribute
> your library to Emacs (or GNU ELPA). Then you'll just have to update
> Emacs, using your preferred method.
I'd still have to update each of my .emacs and install the respective
calls for each version of Emacs I might use there.
martin
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], (continued)
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/07
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/07
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], martin rudalics, 2020/10/08
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/08
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], martin rudalics, 2020/10/09
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/24
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/26
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], martin rudalics, 2020/10/27
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], martin rudalics, 2020/10/27
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/27
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions],
martin rudalics <=
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/27
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], martin rudalics, 2020/10/28
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/28
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], martin rudalics, 2020/10/31
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], Lars Ingebrigtsen, 2020/10/28
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/28
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], João Távora, 2020/10/30
- bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], martin rudalics, 2020/10/31
bug#43609: 28.0.50; eldoc-documentation-function [vs new eldoc-display-functions], Yuan Fu, 2020/10/22