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Re: [Bug-AUCTeX] 11.86: tex-preview's showlabels option doesn't work wit
From: |
Ralf Angeli |
Subject: |
Re: [Bug-AUCTeX] 11.86: tex-preview's showlabels option doesn't work with amsmath's multline environment; workaround found |
Date: |
Sat, 30 Oct 2010 17:48:25 +0200 |
* address@hidden (2010-10-30) writes:
> It is a known problem that latex-preview's showlabels option doesn't
> work with amsmath's multline environment: the label simply doesn't show
> up in the preview of these equations. This has previously been reported
> in http://www.mail-archive.com/address@hidden/msg00653.html quite a
> few years ago. As I rely quite heavily on this option (I think reftex
> doesn't use the previews so it isn't as convenient), this bug is rather
> annoying.
RefTeX works directly with the LaTeX source, not the typeset output.
> Using the attached test file, I think I have found the problem. When
> the multline environment is used, the content is expanded twice in
> amsmath.sty's \multline@, the first time for measurement only.
> address@hidden is thus also called twice, but the second time \next is
> equal to address@hidden and processing get skipped.
Thanks for debugging this.
> If I remove this
> duplication check, by editing the definition of address@hidden in
> prshowlabels.def:
>
> - address@hidden
> + \iffalse\egroup\romannumeral\else
>
> Labels then show up normally.
Hm, but AFAIU this would also remove the feature that labels equal to
the last one are ignored. I'm not sure when a situation with multiple
identical labels usually occurs. I could provoke that by using "eq:foo"
in your test file where you had "eq:foo1" and "eq:foo2" but I am not
sure if this is what David had in mind when he wrote the code.
David, could you please comment?
--
Ralf