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Re: Screenshots, frame shots straight from Emacs
From: |
Stefan Monnier |
Subject: |
Re: Screenshots, frame shots straight from Emacs |
Date: |
Tue, 20 Jul 2021 17:48:45 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
>> -(require 'cl)
>> +(require 'cl-lib)
> What is the difference?
They provide the same features but under different names (i.e. the
above change should generally come with other changes to adjust to the
different names; they seemed to be missing from the patch).
E.g. `cl` provides `position` and `mapcar*` whereas `cl-lib` provides
`cl-position` and `cl-mapcar`. All the functions/macros/variables
exported by `cl-lib` use the `cl-` prefix.
[ Note that in Emacsā„24.3, `(require 'cl)` will require `cl-lib` under
the hood (and then re-export its functions under the old name), and
the reverse holds for Emacs<24.3 if you use the forward compatibility
`cl-lib` package from GNU ELPA. So loading `cl` may also sometimes
end up defining the `cl-<foo>` functions, and loading `cl-lib` may
also sometimes define the "not cl-<foo>" functions. ]
> Why is that needed?
Because `cl` is deprecated.
> Is it it backward compatible?
Featurewise, almost. But it does require code changes (mostly adding
`cl-` prefixes).
> There have been changes to working with cl package for some time, has
> the dust settled yet?
AFAIK the dust settled back when Emacs-24.3 was released with `cl-lib`.
`cl-lib` was slated to (slowly) replace `cl`. In the upcoming Emacs-28,
`cl` is officially deprecated (tho still fully supported). In some
future release the plan is to remove `cl` from Emacs itself, tho we
may then create a GNU ELPA package for it.
IOW, there's no hurry, but moving packages away from `cl` is
recommended (as is the conversion to use `lexical-binding`: all files
bundled with Emacs-28 use `lexical-binding`).
Stefan
- Re: Screenshots, frame shots straight from Emacs, (continued)
- Re: Screenshots, frame shots straight from Emacs, Tomas Hlavaty, 2021/07/20
- Re: Screenshots, frame shots straight from Emacs, Leo Butler, 2021/07/20
- Re: Screenshots, frame shots straight from Emacs, Tomas Hlavaty, 2021/07/20
- Re: Screenshots, frame shots straight from Emacs, Leo Butler, 2021/07/20
- Re: Screenshots, frame shots straight from Emacs, Tomas Hlavaty, 2021/07/20
- Re: Screenshots, frame shots straight from Emacs, Tomas Hlavaty, 2021/07/31
- Re: Screenshots, frame shots straight from Emacs, Emanuel Berg, 2021/07/31
- Re: Screenshots, frame shots straight from Emacs, Eduardo Ochs, 2021/07/31
- Re: Screenshots, frame shots straight from Emacs, Stefan Monnier, 2021/07/20
- Re: Screenshots, frame shots straight from Emacs,
Stefan Monnier <=
- Re: Screenshots, frame shots straight from Emacs, Leo Butler, 2021/07/21
- Re: Screenshots, frame shots straight from Emacs, Stefan Monnier, 2021/07/21
- cl-lib questions (was: Re: Screenshots, frame shots straight from Emacs), Emanuel Berg, 2021/07/21
- Re: cl-lib questions, Stefan Monnier, 2021/07/21
- Re: cl-lib questions, Emanuel Berg, 2021/07/21
- Re: Screenshots, frame shots straight from Emacs, Tomas Hlavaty, 2021/07/22
- Re: Screenshots, frame shots straight from Emacs, Stefan Monnier, 2021/07/22
- Re: Screenshots, frame shots straight from Emacs, Emanuel Berg, 2021/07/22
- Re: Screenshots, frame shots straight from Emacs, Jean Louis, 2021/07/23
- Re: Screenshots, frame shots straight from Emacs, Emanuel Berg, 2021/07/31