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  ANSI Common Lisp   7 Objects   7.7 Dictionary of Objects

7.7.10 slot-exists-p Function

slot-exists-p object slot-name    generalized-boolean

Arguments and Values:
object - an object.

slot-name - a symbol.

generalized-boolean - a generalized boolean.

Returns true if the object has a slot named slot-name.

Affected By:
defclass, defstruct

See Also:
defclass, slot-missing

Although no implementation is required to do so, implementors are strongly encouraged to implement the function slot-exists-p using the function slot-exists-p-using-class described in the Metaobject Protocol.

Allegro CL Implementation Details:

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