* bug#240: 23.0.60; substitute-command-keys incorrect for self-insert-command
@ 2008-05-14 3:56 Drew Adams
0 siblings, 0 replies; 3+ messages in thread
From: Drew Adams @ 2008-05-14 3:56 UTC (permalink / raw
To: emacs-pretest-bug
emacs -Q
In *scratch* buffer, type this, then use C-x C-e after it:
(princ (substitute-command-keys "\\{global-map}") (current-buffer))
You will see this:
key binding
--- -------
\200 .. \377 self-insert-command
C-@ set-mark-command
C-a move-beginning-of-line
etc.
The bug is that the \200 and the \377 are treated differently. The
\200 is a single octal character; the \377 is four characters, \, 3,
7, 7.
This has consequences for code that uses this output as input.
In GNU Emacs 23.0.60.1 (i386-mingw-nt5.1.2600)
of 2008-05-04 on LENNART-69DE564
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --no-opt --cflags -Ic:/g/include
-fno-crossjumping'
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#240: 23.0.60; substitute-command-keys incorrect for self-insert-command
@ 2008-08-19 21:02 Chong Yidong
0 siblings, 0 replies; 3+ messages in thread
From: Chong Yidong @ 2008-08-19 21:02 UTC (permalink / raw
To: Drew Adams; +Cc: 240, emacs-devel
> emacs -Q
> In *scratch* buffer, type this, then use C-x C-e after it:
> (princ (substitute-command-keys "\\{global-map}") (current-buffer))
>
> You will see this:
>
> key binding
> --- -------
>
> \200 .. \377 self-insert-command
>
> The bug is that the \200 and the \377 are treated differently. The \200
> is a single octal character; the \377 is four characters, \, 3, 7, 7.
I believe this is simply how the Lisp printer behaves. Note that
string_count_byte8 is zero for \200, but one for \377; hence \200 is
printed literally, while \377 is converted into an escaped string.
Using `insert' rather than `princ' probably gives the result you want.
I'm no expert on this area, though, so maybe someone else could comment
more authoritatively.
^ permalink raw reply [flat|nested] 3+ messages in thread
* bug#240: 23.0.60; substitute-command-keys incorrect for self-insert-command
2008-08-19 21:02 Chong Yidong
@ 2008-08-19 21:43 ` Drew Adams
0 siblings, 0 replies; 3+ messages in thread
From: Drew Adams @ 2008-08-19 21:43 UTC (permalink / raw
To: 'Chong Yidong'; +Cc: 240, emacs-devel
> > emacs -Q
> > In *scratch* buffer, type this, then use C-x C-e after it:
> > (princ (substitute-command-keys "\\{global-map}") (current-buffer))
> >
> > You will see this:
> >
> > key binding
> > --- -------
> >
> > \200 .. \377 self-insert-command
> >
> > The bug is that the \200 and the \377 are treated
> differently. The \200
> > is a single octal character; the \377 is four characters,
> \, 3, 7, 7.
>
>
> I believe this is simply how the Lisp printer behaves. Note that
> string_count_byte8 is zero for \200, but one for \377; hence \200 is
> printed literally, while \377 is converted into an escaped string.
>
> Using `insert' rather than `princ' probably gives the result you want.
>
> I'm no expert on this area, though, so maybe someone else
> could comment more authoritatively.
1. Yes, thanks. This treats the \200 and \377 the same way - both are single
octal characters:
(with-current-buffer "foo"
(insert (substitute-command-keys
(concat "\\{" "global-map" "}"))))
2. I'm using this in the *Help* buffer. The behavior of using octal chars here
is new with Emacs 23, BTW. In Emacs 22, I see instead " .. y", where the first
char looks like a space char and the y is really a y with an
umlaut/diaresis/trema (two dots, at least). Dunno if the new behavior is
intended or not.
[I'm not sure those represent the same two character ranges, BTW, but in any
case in Emacs 22 there are no octal chars from `substitute-command-keys'.]
^ permalink raw reply [flat|nested] 3+ messages in thread
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