Commit 3afc838f authored by Chong Yidong's avatar Chong Yidong
Browse files

(Quitting): Clarify effects of C-g.

parent 9a1c2249
......@@ -44,15 +44,17 @@ and cancels the command that invoked the recursive edit.
@cindex quitting
@kindex C-g
Quitting with @kbd{C-g} is the way to get rid of a partially typed
command, or a numeric argument that you don't want. It also stops a
running command in the middle in a relatively safe way, so you can use
it if you accidentally give a command which takes a long time. In
particular, it is safe to quit out of a kill command; either your text
will @emph{all} still be in the buffer, or it will @emph{all} be in
the kill ring, or maybe both. Quitting an incremental search does
special things, documented under searching; it may take two successive
@kbd{C-g} characters to get out of a search (@pxref{Incremental
Search}).
command, or a numeric argument that you don't want. Furthermore, if
you are in the middle of a command that is running, @kbd{C-g} stops
the command in a relatively safe way. For example, if you quit out of
a kill command that is taking a long time, either your text will
@emph{all} still be in the buffer, or it will @emph{all} be in the
kill ring, or maybe both. If the region is active, @kbd{C-g}
deactivates the mark, unless Transient Mark mode is off
(@pxref{Persistent Mark}). If you are in the middle of an incremental
search, @kbd{C-g} does special things; it may take two successive
@kbd{C-g} characters to get out of a search. @xref{Incremental
Search}, for details.
On MS-DOS, the character @kbd{C-@key{BREAK}} serves as a quit character
like @kbd{C-g}. The reason is that it is not feasible, on MS-DOS, to
......@@ -66,7 +68,6 @@ with the user. By contrast, it @emph{is} feasible to recognize
@xref{MS-DOS Keyboard}.
@end ifnottex
@findex keyboard-quit
@kbd{C-g} works by setting the variable @code{quit-flag} to @code{t}
the instant @kbd{C-g} is typed; Emacs Lisp checks this variable
......
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