10.2.13 symbol-plist [Accessor]

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.