;;; The caller can supply :ALLOW-OTHER-KEYS T to suppress checking. ((lambda (&key x) x) :x 1 :y 2 :allow-other-keys t) => 1 ;;; The callee can use &ALLOW-OTHER-KEYS to suppress checking. ((lambda (&key x &allow-other-keys) x) :x 1 :y 2) => 1 ;;; :ALLOW-OTHER-KEYS NIL is always permitted. ((lambda (&key) t) :allow-other-keys nil) => T ;;; As with other keyword arguments, only the left-most pair ;;; named :ALLOW-OTHER-KEYS has any effect. ((lambda (&key x) x) :x 1 :y 2 :allow-other-keys t :allow-other-keys nil) => 1 ;;; Only the left-most pair named :ALLOW-OTHER-KEYS has any effect, ;;; so in safe code this signals a PROGRAM-ERROR (and might enter the ;;; debugger). In unsafe code, the consequences are undefined. ((lambda (&key x) x) ;This call is not valid :x 1 :y 2 :allow-other-keys nil :allow-other-keys t)
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