ToC DocOverview CGDoc RelNotes Index PermutedIndex
Allegro CL
Home Previous Up Next Table of Contents Index
  3.4 Lambda Lists   3.4.1 Ordinary Lambda Lists   3.4.1.4 Specifiers for keyword parameters   3.4.1.4.1 Suppressing Keyword Argument Checking

3.4.1.4.1.1 Examples of Suppressing Keyword Argument Checking

;;; 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)

Home Previous Up Next Table of Contents Index
© Franz Inc. All Rights Reserved - File last updated 2022-07-25