empty default captions for src blocks

empty default captions for src blocks

[Dominik Ernst]

Hallo,

I have a small question, I hope it is right here. The following org code:

#+CAPTION: caption of block 1
#+BEGIN_SRC
vmpovapd %%zmm0, %zmm1
#+END_SRC


#+BEGIN_SRC
vmpovapd %%zmm0, %zmm1
#+END_SRC

is exported (in my setup) to latex as:

\lstset{language=phiassembler,caption={caption of block1},numbers=none}
\begin{lstlisting}
vmpovapd %%zmm0, %zmm1
\end{lstlisting}

\begin{lstlisting}
vmpovapd %%zmm0, %zmm1
\end{lstlisting}

which results in the rendered pdf as two listings with the same caption, 
although only the first block has a caption. I think this is because of 
the lstlistings statemachine, that is maniupulated through lstset. It 
has an unchanged state in the second listing, which then gets the same 
caption.

Is there an easy way to  fix this? My hack so far is to modify 
ox-latex.el so that

2171:    (when caption-str `(("caption" ,caption-str)))

becomes:

2171:    (if caption-str `(("caption" ,caption-str)) `(("caption" ,"{}")) )

which adds a default empty caption, which makes everything behave like I 
want it to, so no wrong captions on source blocks where I define no 
caption. My org version is 8.2.5h.

Regards,
Dominik

Re: empty default captions for src blocks

[Dominik Ernst]

By the way, the same applies to labels. I had hoped, that moving the options
from lstset into [] brackets in front of the region would make it be valid
for that element only, but it did nothing.

Re: empty default captions for src blocks

[Bastien]

Hi Dominik,

Dominik Ernst <dominik.ernst@gmx.de> writes:

> I have a small question, I hope it is right here.

It is!

> #+BEGIN_SRC
> vmpovapd %%zmm0, %zmm1
> #+END_SRC

(Btw, you need a language after BEGIN_SRC ...)

> which results in the rendered pdf as two listings with the same caption, 

Bug confirmed and fixed in maint, with a dummy fix:

Nicolas, do you see another way around this?

-- 
 Bastien

Re: empty default captions for src blocks

[Nicolas Goaziou]

Hello,

Bastien <bzg@gnu.org> writes:

> Bug confirmed and fixed in maint, with a dummy fix:
>
> Nicolas, do you see another way around this?

Well, not really. But it looks like a bug on the "listings" side, not
the Org one. If we add a workaround in Org core, it may stay here
forever, even after the bug is fixed upstream. I think the OP should
first ask "listings" maintainer about it.


Regards,

-- 
Nicolas Goaziou

Re: empty default captions for src blocks

[Bastien]

Hi Nicolas,

Nicolas Goaziou <n.goaziou@gmail.com> writes:

> Well, not really. But it looks like a bug on the "listings" side, not
> the Org one. If we add a workaround in Org core, it may stay here
> forever, even after the bug is fixed upstream. I think the OP should
> first ask "listings" maintainer about it.

Dominik, can you ask the listings maintainers about this?

In the meantime, let's stick with the current workaround.

-- 
 Bastien