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logical not condition in ibuffer config
From: |
Hikaru Ichijyo |
Subject: |
logical not condition in ibuffer config |
Date: |
Sun, 11 Mar 2018 15:17:52 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) |
I've been setting up ibuffer to group my buffer listing into
categories. I've encountered a situation where I may want to make an
exception to one of the rules. This is my config:
--8<---------------cut here---------------start------------->8---
ibuffer-saved-filter-groups
(quote (("Default"
("IRC" (mode . erc-mode))
("Web" (mode . w3m-mode))
("Mail & News" (or
(mode . message-mode)
(mode . mail-mode)
(mode . gnus-group-mode)
(mode . gnus-summary-mode)
(mode . gnus-article-mode)))
("Dired" (mode . dired-mode))
("Text" (mode . text-mode))
("HTML/CSS" (or
(mode . html-mode)
(mode . css-mode)))
("Config" (or
(mode . conf-space-mode)
(mode . conf-unix-mode)
(mode . conf-xdefaults-mode)))
("Shell" (mode . shell-script-mode))
("Perl" (mode . perl-mode))
("Lisp & Emacs" (or
(mode . emacs-lisp-mode)
(mode . bookmark-bmenu-mode)
(name . "^\\*Packages\\*$")))
("Docs" (or
(name . "^\\*info\\*$")
(name . "^\\*Man "))))))
--8<---------------cut here---------------end--------------->8---
I am finding that the "Lisp & Emacs" group catches my bbdb buffer,
because it is in Emacs-Lisp mode, but I would rather this went to
Default, since I rarely edit it directly.
So, I want to use a 'not' condition in these rules, to say, "Put
anything in 'Lisp & Emacs' that's in emacs-lisp-mode,
bookmark-bmenu-mode, or is named '*Packages*', except for buffers named
'bbdb'."
The problem is, I'm not really sure how I can use "or" operators here to
begin with, aside from seeing that they work, having based this config
on common configurations I've seen in other people's ~/.emacs files.
This whole section seems to define an alist. How does it get executed?
When I try to use "and" or "not", it doesn't work, but for some reason,
"or" does work. Something more is going on here beyond just an alist
definition. I am still learning Emacs Lisp, obviously.
Is there a way I can use other operators like "not" and "and" in this
ibuffer setup? It would be useful for cases where you want a rule exception.
--
He that would make his own liberty secure must guard even his enemy from
oppression; for if he violates this duty, he establishes a precedent
that will reach to himself.
--Thomas Paine