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bug#51468: reftex-ref-style-alist in amsmath.el

From: Gustavo Barros
Subject: bug#51468: reftex-ref-style-alist in amsmath.el
Date: Fri, 29 Oct 2021 07:28:47 -0300
User-agent: mu4e 1.6.8; emacs 27.2

Hi Arash,

On Fri, 29 Oct 2021 at 11:31, Arash Esbati <arash@gnu.org> wrote:

My understanding of `reftex-ref-style-alist' being a custom variable is
that you can toggle the keys for the reference macros if you want to.
The reference styles get activated:

a) in RefTeX without AUCTeX: If you add an entry to
,----[ C-h v reftex-ref-style-default-list RET ] | reftex-ref-style-default-list is a variable defined in ‘reftex-vars.el’. | | Its value is ("Default") | | List of reference styles to be activated by default.
   | The order is significant and controls the order in which macros
   | can be cycled in the buffer for selecting a label.  The entries
   | in the list have to match the respective reference style names
   | used in the variable ‘reftex-ref-style-alist’.

b) in AUCTeX: When you have set `LaTeX-reftex-ref-style-auto-activate'
   to t.

So deleting an entry in `reftex-ref-style-alist' isn't intended to
prevent a reference style from being activated.

Understood. I was aware of `reftex-ref-style-default-list', but the only way to keep the ref styles responsive to the loaded packages is the AUCTeX way, leaving `LaTeX-reftex-ref-style-auto-activate' to t.

Re-adding the entry is due to supporting older Emacs'en. The entry for "AMSmath" was not present as the variable was introduced[1]. That entry
was added in 2018 and amsmath.el tries to fill the gap.

That's a good point, I hadn't thought of it. And explains the difference to "Varioref", "Cleveref", "Hyperref" etc. too.

I think the bottom line is set `LaTeX-reftex-ref-style-auto-activate' to
nil if you don't want AUCTeX to activate that reference style.

,----[ C-h v LaTeX-reftex-ref-style-auto-activate RET ]
| LaTeX-reftex-ref-style-auto-activate is a variable defined in ‘tex-style.el’. | | Its value is t | | Whether to activate automatically RefTeX reference styles.

Well, I do like what `LaTeX-reftex-ref-style-auto-activate' does for me, I just don't use `\eqref' enough to grant it an entry there. But, no worries, it is easy to keep an `("AMSmath" "amsmath" nil)' in `reftex-ref-style-alist' just as well.

Thanks for considering and for the thoughtful answer.


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