0

I want to comment out all environments say myenv in a tex-file. I can find them with the regexp:

\\begin{myenv}\(.\|\n\).*?\\end{myenv}

(instead of \n I had do type C-q C-j).

But what would be the correct regexp for replacing? How to reverse it, i.e. uncomment all environments myenv?

  • 1
    Can be done in emacs. But I wonder whether it would be better to use the LaTeX-package "comment" for this purpose. With this package you can set \excludecomment{myenv} in the document preamble. Your regexp is interesting in the aspect that you only allow one newline behind \\begin{myenv} and the backslash for the or-operator is missing. I would expect \\begin{myenv}\(.\|n\)*\\end{myenv} as regexp. – Tobias Mar 22 '16 at 11:59
  • I just wanted to add that you have to type C-q C-j for the newline character n in my last comment. You have already mentioned that in your question. – Tobias Mar 22 '16 at 12:09
  • I think a better solution would be to write a loop to find all myenv environments and applying comment-region to each match. Or apply uncomment-region to undo it. You should be able to use the same regexp for both cases. (Sorry, don't have the time to flesh this out to a proper answer.) – Harald Hanche-Olsen Mar 22 '16 at 12:23
1

I think, for what you are doing, the comment by Tobias provides a superior solution. And this question gives quite a few options for commenting out chunks of code. That said, I'll assume this is an issue with using emacs, rather than latex.

Make your entire regex match a group \(regex\), then the regex to replace it will be similar to \\iffalse \1 \\fi.

An easier solution would be to write a keyboard macro that finds the begin\end environment commands and inserts the comment code there.

0

M-x re-search-forward RET

MY_REGEXP RET

followed by M-x comment-dwim RET

;;;

comment-dwim is at M-;

After re-search-forward the region should be visible.

If not C-x C-x resp. M-xexchange-point-and-markRET

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.