Hi, my name is Helfer Thomas. I am a new user to pandoc.

I am trying to create a slideshow using pandoc. The following pandoc-markdown code leads to an error in pdf output but not in html output :

• removing code introduced in the standard
  • enable\_if{.cpp}, typetraits{.cpp}, shared\_ptr{.cpp} <!-- end -->

I am using pandoc 1.12.4.2.

I used to following command to build the pdf:

pandoc -f markdown+tex_math_single_backslash --slide-level 2 --toc -t beamer -V theme:Warsaw test.md -o test.pdf

I used this command to build the html output :

pandoc -s -f markdown+tex_math_single_backslash --slide-level 2 --toc --mathjax -i -t revealjs -V theme:night test.md -o test.html

Helfer Thomas

My example code seems to have been interpreted. The undersores in enable_if and shared_ptr shall not be escaped.

Sincerly

I'm seeing this too on pandoc 1.13.0.1.

It seems to be a beamer specific issue, running

pandoc -f markdown -t beamer  test.md -o test.pdf 

results in the same error, but running

pandoc -f markdown -t latex  test.md -o test.pdf

works fine. However, the backslashes are showing in the pdf output, is that your intention?

Also, the error persists when the backslashes are removed from the markdown source.

For anyone following along, the two beamer/latex outputs can be generated with:

pandoc -s -f markdown -t beamer  test.md -o test_beamer.tex

and

pandoc -s -f markdown -t latex  test.md -o test_latex.tex

Both contain unescaped underscores, so I'm actually more surprised that test_latex.tex compiles correctly.

beamer frames with verbatim content (that means a content which needs special \catcode settings) needs the option fragile:

If you wish to use a {verbatim} environment in a frame, you have to add the option [fragile] to the {frame} environment. In this case, you really have to use the {frame} environment (not the \frame command) and the \end{frame} must be alone on a single line. Using this option will cause the frame contents to be written to an external file and the read back. See the description of the {frame} environment for more details.

Using the following page:
http://pbelmans.wordpress.com/2011/02/20/why-latex-beamer-needs-fragile-when-using-verbatim

I found a workaround is to use the option [fragile] after each begin{frame} containing verbatim code. Is this a satisfying solution ?

note : this was tested on the tex file generated by pandoc.

Sincerly,

Helfer Thomas

The LaTeX writer seems to already have this functionality, but it isn't getting triggered; see https://github.com/jgm/pandoc/blob/master/src/Text/Pandoc/Writers/LaTeX.hs#L272

Hello,
I am posting here because I've recently had the same issue using pandoc to produce beamer slideshows and found this thread. I was wondering if there is progress ? Would it be possible to add a 'fragile' option to markdown elements converted into frames for instance ? Message from @mszep suggests that pandoc already includes this, but it does not seem to perform well. But wonderful toolbox anyway !