From a1fd42c0c24a52df360d45252bd1e44253ae31b3 Mon Sep 17 00:00:00 2001 From: "Richard M. Stallman" Date: Tue, 10 May 1994 07:24:27 +0000 Subject: [PATCH] (syms_of_keyboard): Doc fix. --- src/keyboard.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/src/keyboard.c b/src/keyboard.c index 2cfc6895977..910bbf68da7 100644 --- a/src/keyboard.c +++ b/src/keyboard.c @@ -6067,11 +6067,21 @@ Buffer modification stores t in this variable."); Vcommand_hook_internal = Qnil; DEFVAR_LISP ("pre-command-hook", &Vpre_command_hook, - "Normal hook run before each command is executed."); + "Normal hook run before each command is executed.\n\ +While the hook is run, its value is temporarily set to nil\n\ +to avoid an unbreakable infinite loop if a hook function gets an error.\n\ +As a result, a hook function cannot straightforwardly alter the value of\n\ +`pre-command-hook'. See the Emacs Lisp manual for a way of\n\ +implementing hook functions that alter the set of hook functions."); Vpre_command_hook = Qnil; DEFVAR_LISP ("post-command-hook", &Vpost_command_hook, - "Normal hook run after each command is executed."); + "Normal hook run after each command is executed.\n\ +While the hook is run, its value is temporarily set to nil\n\ +to avoid an unbreakable infinite loop if a hook function gets an error.\n\ +As a result, a hook function cannot straightforwardly alter the value of\n\ +`post-command-hook'. See the Emacs Lisp manual for a way of\n\ +implementing hook functions that alter the set of hook functions."); Vpost_command_hook = Qnil; DEFVAR_LISP ("lucid-menu-bar-dirty-flag", &Vlucid_menu_bar_dirty_flag, -- 2.39.5