slot-exists-p (ANSI and GNU Common Lisp Document)

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#### 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.

#### Description::

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

#### Affected By::

defclass, defstruct

#### See Also::

defclass , slot-missing

#### Notes::

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.