\f
;;;; Hook manipulation functions.
-(defun run-hooks (&rest hooklist)
- "Takes hook names and runs each one in turn. Major mode functions use this.
-Each argument should be a symbol, a hook variable.
-These symbols are processed in the order specified.
-If a hook symbol has a non-nil value, that value may be a function
-or a list of functions to be called to run the hook.
-If the value is a function, it is called with no arguments.
-If it is a list, the elements are called, in order, with no arguments.
-
-To make a hook variable buffer-local, use `make-local-hook', not
-`make-local-variable'."
- (while hooklist
- (let ((sym (car hooklist)))
- (and (boundp sym)
- (symbol-value sym)
- (let ((value (symbol-value sym)))
- (if (and (listp value) (not (eq (car value) 'lambda)))
- (while value
- (if (eq (car value) t)
- ;; t indicates this hook has a local binding;
- ;; it means to run the global binding too.
- (let ((functions (default-value sym)))
- (while functions
- (funcall (car functions))
- (setq functions (cdr functions))))
- (funcall (car value)))
- (setq value (cdr value)))
- (funcall value)))))
- (setq hooklist (cdr hooklist))))
-
-(defun run-hook-with-args-until-success (hook &rest args)
- "Run HOOK with the specified arguments ARGS.
-HOOK should be a symbol, a hook variable. Its value should
-be a list of functions. We call those functions, one by one,
-passing arguments ARGS to each of them, until one of them
-returns a non-nil value. Then we return that value.
-If all the functions return nil, we return nil.
-
-To make a hook variable buffer-local, use `make-local-hook', not
-`make-local-variable'."
- (and (boundp hook)
- (symbol-value hook)
- (let ((value (symbol-value hook))
- success)
- (while (and value (not success))
- (if (eq (car value) t)
- ;; t indicates this hook has a local binding;
- ;; it means to run the global binding too.
- (let ((functions (default-value hook)))
- (while (and functions (not success))
- (setq success (apply (car functions) args))
- (setq functions (cdr functions))))
- (setq success (apply (car value) args)))
- (setq value (cdr value)))
- success)))
-
-(defun run-hook-with-args-until-failure (hook &rest args)
- "Run HOOK with the specified arguments ARGS.
-HOOK should be a symbol, a hook variable. Its value should
-be a list of functions. We call those functions, one by one,
-passing arguments ARGS to each of them, until one of them
-returns nil. Then we return nil.
-If all the functions return non-nil, we return non-nil.
-
-To make a hook variable buffer-local, use `make-local-hook', not
-`make-local-variable'."
- ;; We must return non-nil if there are no hook functions!
- (or (not (boundp hook))
- (not (symbol-value hook))
- (let ((value (symbol-value hook))
- (success t))
- (while (and value success)
- (if (eq (car value) t)
- ;; t indicates this hook has a local binding;
- ;; it means to run the global binding too.
- (let ((functions (default-value hook)))
- (while (and functions success)
- (setq success (apply (car functions) args))
- (setq functions (cdr functions))))
- (setq success (apply (car value) args)))
- (setq value (cdr value)))
- success)))
-
-;; Tell C code how to call this function.
+;; We used to have this variable so that C code knew how to run hooks. That
+;; calling convention is made obsolete now the hook running functions are in C.
(defconst run-hooks 'run-hooks
"Variable by which C primitives find the function `run-hooks'.
-Don't change it.")
+Don't change it. Don't use it either; use the hook running C primitives.")
(defun make-local-hook (hook)
"Make the hook HOOK local to the current buffer.