Just getting used to paredit in emacs on OS X - how come C-) doesn't work?
I've recently set up a Common Lisp programming environment in Mac OS X Leopard. One emacs module which I've found to be indispensable is paredit. Paredit is doing its part to help me wrangle my Lisp code more easily, but I've ran into a bit of a snare.
C-), bound to paredit-forward-slurp-sexp
, is not forward slurping sexps but instead echoing the number 0
. I'm using a Mac, alternating between iTerm and Terminal. The same problem is present in both apps.
I tried the same key combination in GNU Emacs' GUI version, and lo, it worked. Unfo开发者_运维技巧rtunately the graphical version of Emacs does not satisfy my needs; I would like to keep using my iTerm based rig.
So I ask you, stackoverflow: what do I have to do to get the C-) combo to register with iTerm?
For what is worth, on my Mac C-<right> and C-<left> are bound to Mission Control and move to the right and left spaces.
Having said that, C-Shift-<right> and C-Shift-<left> seem to do the trick and I can slurp and barf nicely on emacs with paredit.
IIRC, the modifier combination of Control and Shift cannot be sent to Emacs in a terminal. C-)
requires the shift key, so it's out of bounds. I'm not convinced that any amount of terminal tweaking will change this.
I believe paredit-forward-slurp-sexp
also gets bound to C-<right>
by default, which should work fine in a terminal, so perhaps you can train your fingers to use that key instead.
Based on Cosmin's blog I got this to work in iTerm2.
- Open Preferences > Profiles > Keys. (You may want to copy the default profile and change the copy.)
- Click the
+
under the Profile Shortcut Keys:. - Type
Ctrl+)
(ctrl+shift+leftparen). - For the Action select Send Escape Character and
- put
[1;5C
in the text-box.
I have a hunch your iTerm / Terminal programs are not actually able to send C-), because there is no such character in ASCII and I am pretty sure there is no sequence for it on the VT100.
You can verify this for yourself, though. Run emacs in your terminal emulator. Type C-). Then type C-h l ("view-lossage"). This will show you the last few hundred keys that Emacs saw you type. Try the same thing after typing a non-control ) to see if they are different. If not, you are out of luck unless you can configure iTerm / Terminal to send them to Emacs in distinct ways.
That said, you can always bind some other key to paredit-forward-slurp-sexp
.
I was running into the same kind of trouble with paredit's alternate C-<right> binding, and found tmux was causing my trouble - basically tmux was subsuming the C- and just passing along a <right>.
I found the solution at https://unix.stackexchange.com/a/34484, and it comprised adding
set-window-option -g xterm-keys on
to my ~/.tmux.conf.
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