* `quit_char', `set-quit-char', and `set-input-mode'
@ 2012-05-11 23:55 Drew Adams
2012-05-12 9:57 ` Thien-Thi Nguyen
0 siblings, 1 reply; 2+ messages in thread
From: Drew Adams @ 2012-05-11 23:55 UTC (permalink / raw
To: emacs-devel
* Variable `quit-char' is only in the C code. There is no such Lisp variable.
* Function `set-quit-char' exists, but is not even mentioned in the Elisp
manual.
* Function `set-input-mode' is mentioned in the manual, but it just seems more
roundabout than `set-quit-char'.
Why isn't `set-quit-char' documented as the way to set the quit character? Is
there some advantage to using `set-input-mode' for this?
Why don't we have a Lisp variable for this (even a user option perhaps)? Why
must we use special functions to set this character, rather than just using
`set' with a variable?
If we had a variable, then code could check whether some event was equal to the
quit character, instead of checking only the hard-coded value 7 (C-g). If
something changes the `quit_char' from C-g to something else, then code testing
7 will no longer DTRT, no?
I'm guessing there are good reasons for some or all of these things - reasons
that would help me understand better. Explanation appreciated.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: `quit_char', `set-quit-char', and `set-input-mode'
2012-05-11 23:55 `quit_char', `set-quit-char', and `set-input-mode' Drew Adams
@ 2012-05-12 9:57 ` Thien-Thi Nguyen
0 siblings, 0 replies; 2+ messages in thread
From: Thien-Thi Nguyen @ 2012-05-12 9:57 UTC (permalink / raw
To: Drew Adams; +Cc: emacs-devel
() "Drew Adams" <drew.adams@oracle.com>
() Fri, 11 May 2012 16:55:46 -0700
I'm guessing there are good reasons for some or all of
these things - reasons that would help me understand
better. Explanation appreciated.
I ported Emacs 22 to VMS a while back, and fuzzily remember
playing w/ this corner (changing things to see what breaks).
Based on this, i would say these things are the way they are
primarily due to tradition (C-g ≡ ASCII BEL, which makes a
‘ding’, uncoincidentally) and inertia (no one has bothered
{ration,gener}alizing things further). That is also a guess.
^ permalink raw reply [flat|nested] 2+ messages in thread
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