6.6 Advice functions and macros
The main functions used for advice are introduced below. See the reference pages for full details.
The main macro used to define new pieces of advice is
Pieces of around advice should use
call-next-advice to invoke the next piece of advice. As explained earlier this either calls the next piece of around advice (if one exists), or calls the combination of before advice, the original definition, and after advice. It may only be called from within the body of the around advice.
To remove a piece of advice, use the macro
delete-advice or the function
LispWorks User Guide and Reference Manual - 21 Dec 2011