Evaluate diary-style expression entries

[przemekd]

Does this feature exist in Emacs orgmode core?

Yes

Orgmode link

https://orgmode.org/manual/Weekly_002fdaily-agenda.html

Feature value

By using diary-style expression entries such as:

%%(diary-remind '(diary-anniversary 06 02 1969) 14) %d. wedding anniversary

one can easily add anniversaries and holidays into the agenda.
Right now it seems to be unsupported.

Additional context

No response

[kristijanhusak]

@przemekd did you use the diary style within emacs? I never used it, and syntax seems a bit confusing. If you have experience with it, providing brief explanation would be super helpful.

[przemekd]

@kristijanhusak yeah, I do use it. I admit, it is confusing but also really useful at the same time. I don't think I can explain it better than the official documentation:

• https://www.gnu.org/software/emacs/manual/html_node/emacs/Special-Diary-Entries.html
• https://www.gnu.org/software/emacs/manual/html_node/emacs/Sexp-Diary-Entries.html

diary-remind used in the example above creates a reminder that a particular date comes close.

[TravonteD]

As a note for this %%() is just calling a function diary-remind, so I think generic support for calling functions using the %%() syntax would get us most of the way, then the function diary-remind could be implemented in this repo (or in a plugin)

[przemekd]

@TravonteD Do you mean adding support for calling functions here first? Are there any materials on how to start developing something like that? I could try to help here and try to implement it myself.