interactive-stream-p (ANSI and GNU Common Lisp Document)

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#### 21.2.10 interactive-stream-p [Function]

`interactive-stream-p` stream ⇒ generalized-boolean

#### Arguments and Values::

stream—a stream.

generalized-boolean—a generalized boolean.

#### Description::

Returns true if stream is an interactive stream; otherwise, returns false.

#### Examples::

     (when (> measured limit)
       (let ((error (round (* (- measured limit) 100)
                           limit)))
         (unless (if (interactive-stream-p *query-io*)
                     (yes-or-no-p "The frammis is out of tolerance by ~D
                                   Is it safe to proceed? " error)
                     (< error 15))  ;15
           (error "The frammis is out of tolerance by ~D

#### Exceptional Situations::

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

#### See Also::

Stream Concepts