Re: Pandoc and nested emhases

[Max Nikulin <manikulin@gmail.com>]

On 18/02/2022 07:47, Juan Manuel Macías wrote:
> 
> Otherwise, if you export to LaTeX with pandoc (v. 2.14.2), the result is
> (to my surprise) correct:
> 
> str="/lorem /ipsum/ dolor/"
> pandoc -f org -t latex <<< $str
> \emph{lorem \emph{ipsum} dolor}

2.5-3build2 from Ubuntu-20.04 works in the same way.

I like such behavior:

echo "/lorem =ip/ sum= dolor/" | pandoc -f org -t latex
\emph{lorem \texttt{ip/\ sum} dolor}

I know at least one more persons who will be happy as well:
https://list.orgmode.org/87pmtqp79s.fsf@web.de/T/#u 
mid:87pmtqp79s.fsf@web.de
(tracked as a confirmed bug at https://updates.orgmode.org/)

printf '/lorem\nipsum [[https://orgmode.org/,service][dolor]] ipsum/\n' 
| pandoc -f org -t latex
\emph{lorem ipsum \href{https://orgmode.org/,service}{dolor} ipsum}

> Another (more abstract) doubt that arises, although I am not an expert
> in matters of grammar and specifications. If nested emphases of the same
> category are not possible in Org, should this be understood as a bug or
> a feature? What implication does it have if a external parser, like
> Pandoc, parses them just "fine"?

Nicolas Goaziou explicitly stated that current behavior is correct, see 
"[Patch] to correctly sort the items with emphasis marks in a list". 
Tue, 20 Apr 2021 22:37:31 +0200. mid:874kg0ae0k.fsf@nicolasgoaziou.fr
https://list.orgmode.org/874kg0ae0k.fsf@nicolasgoaziou.fr/

Nicolas confirmed it when I posted a similar example later in the 
following discussion:

Ihor Radchenko. c47b535bb origin/main org-element: Remove dependency on 
‘org-emphasis-regexp-components’
Thu, 18 Nov 2021 20:25:33 +0800. mid:87tug93b2a.fsf@localhost
https://list.orgmode.org/87tug93b2a.fsf@localhost/
> My intuition says that the current parser behaviour is not correct. It
> would make more sense to prioritise link over italics. However, it would
> require a major change in the parser - instead of a single pass, the
> parser may parse different types of objects sequentially.

Nicolas Goaziou. c47b535bb origin/main org-element: Remove dependency on 
‘org-emphasis-regexp-components’
Thu, 18 Nov 2021 13:35:19 +0100. mid:87y25l8wvs.fsf@nicolasgoaziou.fr
https://list.orgmode.org/87y25l8wvs.fsf@nicolasgoaziou.fr/
> I disagree. Priority should be given to the first object being started.
> This is, IMO, the only sane way to handle syntax.

And once more in response to my message:

Nicolas Goaziou. org parser and priorities of inline elements.
Sat, 27 Nov 2021 20:02:31 +0100. mid:87mtlppgl4.fsf@nicolasgoaziou.fr
https://list.orgmode.org/87mtlppgl4.fsf@nicolasgoaziou.fr/
> I don't see any incentive to change the order objects are parsed, once
> you know how Org does it. This is just a red herring. What is useful,
> however, is to fontify them the way Org sees them.

So formally this feature of pandoc is a bug (due to different kind of 
parser). It is the reason why a corpus of tests should exist in a format 
that can be easily imported from various programming languages.