Allow customizing rebox-language-character-alist

[rcoacci]

I'm trying to use Rebox2 for Fortran programming (yes, I know...), and since Fortran 90 uses "!" as comment char, Rebox2 doesn't work. Looking at the code it seems that allowing rebox-language-character-alist or even better use the mode's comment char (if possible) instead of hardcoding the possible chars.

[lewang]

You can customize rebox-language-character-alist and call rebox-register-all-templates.

[lewang]

The box detection could be made dynamic but I don't think enough people use this to make it worth the trouble.

[rrgalvan]

Hello:

I am also one of those rare persons interested in Fortran 90 and Emacs. Some time ago I customized rebox2 by adding Fortran as "language #7", specifically:

• I added the list (7 . "!") to rebox-language-character-alist
• I added to rebox-regexp-star the following line:
  "^[ \t]*!+" ; 7

Now rebox2 comments work in my Emacs for Fortran90. If you wish, I can send you a patch (although I think it is not difficult to include the changes by hand)

[ashiklom]

Building on the previous answer, for what it's worth, I was able to get this to work with Fortran 90 using the following use-package configuration:

(use-package rebox2
  :ensure t
  :config
  (add-to-list 'rebox-language-character-alist '(7 . "!"))
  (setq rebox-regexp-start (vconcat rebox-regexp-start '("^[ \t]*!+")))
  (rebox-register-all-templates)
  )

In theory, it should be pretty straightforward to further expand this to other comment types by just changing the ! to whatever the correct comment character is.