Re: Why shouldn't we have a #if .... #else .... #endif construct in Emacs Lisp?

[Richard Stallman <rms@gnu.org>]

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  > Org mode uses `fboundp' check to fontify arbitrary source blocks:

  > #+begin_src language
  > ...
  > #+end_src

  > The corresponding code does the following:

  > (defun org-src-font-lock-fontify-block (lang start end)
  >   "Fontify code block between START and END using LANG's syntax.
  > This function is called by Emacs' automatic fontification, as long
  > as `org-src-fontify-natively' is non-nil."
  > ...
  >     (let ((lang-mode (org-src-get-lang-mode lang)))
  >       (when (fboundp lang-mode)
  >       <fontify using LANG-MODE's native fontification>

We may be talking about different kincs of cases.

As I understand it, the proposal was to handle at compile time
certain conditionals at _top-level_ in the source file being compiled.
Things like

(if (fboundp 'whatever)
  ...conditional-code...)

However, what you've shown is a conditional inside a function definition
that is part of org-mode -- right?

The proposal I think we are discussing would have no effect at all on
cases like that.  So this example would get the unchanged curent
behavior, just as you asked for.


-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)