symbol-plist (Accessor)

Syntax:

(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.