| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
Arguments: fspec &optional stream
Starting in Allegro CL release 6.0, the new fwrapper facility, described in fwrappers-and-advice.htm, replaces the advice facility, and continued use of the advice facility is deprecated.
This function prints a description of the advice on
fspec and then returns nil
. fspec must be a function
name (it is typically a symbol) identifying a function or
macro. stream specifies the stream where the
description will be written. The default value for
stream is t
, indicating
the stream which is the value of *standard-output*
.
Advice is described by name and listed in the order in which it runs. The following (rather simple-minded) example shows how the output looks.
See also fwrappers-and-advice.htm for general information on the new fwrapper facility and the older, now deprecated, advice facility in Allegro CL.
;; Define the function and the advice: (defun foo nil nil) (excl:advise foo :before jack nil (format t "jack~%")) (excl:advise foo :before nil nil (format t "nil 1~%")) (excl:advise foo :before nil 100 (format t "nil 2~%")) (excl:advise foo :after jill nil (format t "jill~%")) (excl:advise foo :after nil nil (format t "nil 3~%")) ;; Now when foo is run, the following is printed: USR(12): (foo) nil 1 jack nil 2 jill nil 3 nil USER(13): (excl:describe-advice 'foo) Before advice: (nil (format t "nil 1~%")) (jack (format t "jack~%")) (nil (format t "nil 2~%")) After advice: (jill (format t "jill~%")) (nil (format t "nil 3~%")) nil USER(14):
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |