Major Section: SWITCHES-PARAMETERS-AND-MODES
Example: ; Turn off all guard-checking for the indicated calls of append and car: (with-guard-checking :none (car (append 3 4))) General Form: (with-guard-checking val form)where
valevaluates to a legal guard-checking value (see set-guard-checking, or evaluate
*guard-checking-values*to see the list of such values), and
formis a form to be evaluated as though we had first executed
(set-guard-checking val). Of course, this gaurd-checking setting is active only during evaluation of
form, and is ignored once evaluation passes into raw Lisp functions (see guards-and-evaluation).