symbol-plist

ToC

Allegro CL

ANSI Common Lisp

10 Symbols

10.2 Dictionary of Symbols

10.2.13 symbol-plist

Accessor

Syntax:

symbol-plist symbol

plist

(setf (symbol-plist symbol) new-plist)

Arguments and Values:

symbol - a symbol.

plist, new-plist - a property list.

Description:

Accesses the property list of symbol.

Examples:

 (setq sym (gensym))  #:G9723
 (symbol-plist sym)  ()
 (setf (get sym 'prop1) 'val1)   VAL1
 (symbol-plist sym)  (PROP1 VAL1)
 (setf (get sym 'prop2) 'val2)   VAL2
 (symbol-plist sym)  (PROP2 VAL2 PROP1 VAL1)
 (setf (symbol-plist sym) (list 'prop3 'val3))  (PROP3 VAL3)
 (symbol-plist sym)  (PROP3 VAL3)

Exceptional Situations:

Should signal an error of type type-error if symbol is not a symbol.

See Also:

get, remprop

Notes:

The use of setf should be avoided, since a symbol's property list is a global resource that can contain information established and depended upon by unrelated programs in the same Lisp image.

Allegro CL Implementation Details:

None.